Koskamo

ICOS Carbon Portal MCP

An official Model Context Protocol server operated by ICOS ERIC that provides AI assistants with access to greenhouse-gas observations across atmosphere, ocean, and ecosystem domains. It allows users to discover datasets, compute statistics on the server, fetch data, and automatically retrieve citations, licenses, and DOIs via RO-Crate data passports for every answer.

Visit ICOS ERIC

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

ICOS Carbon Portal MCP logo, by ICOS ERICVendor evidenceStreamable HTTPNo sign-inEndpoint checked 2026-11-01Operated by ICOS ERIC
MCP endpoint (Streamable HTTP)
https://mcp.icos-cp.eu/mcp
Vendor documentation

What you can do with it

  • List ICOS datasets with domain and coverage details
  • Compute aggregate statistics like mean or sum on the server
  • Fetch observations filtered by station, time, or region
  • Retrieve citation text, license, and DOI for data sources

Source and maintenance

Vendor evidenceRegistry 0.2.0
mcp-registry: eu.icos-cp/icos@0.2.0Project website

Protocol and capabilities

Server
icos 0.2.0
MCP protocol
2025-06-18
Tools
8 advertised
Resources
3 advertised
Resource templates
2 advertised
Prompts
3 advertised
Server-advertised capabilities
{
  "tools": {
    "listChanged": false
  },
  "prompts": {
    "listChanged": false
  },
  "resources": {
    "subscribe": false,
    "listChanged": false
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

ICOS (Integrated Carbon Observation System) observations: atmospheric greenhouse gases (CO2, CH4, N2O, CO, radon, 14CO2) and meteorology at ICOS stations, surface-ocean CO2 (SOCAT and ICOS ocean), and ecosystem fluxes (FLUXNET and near-real-time ETC data). How to use these tools: 1. search_variables to find the variable id -- ids look like icos-obspack.co2.co2. Prefer the primary measurement over its companions (std_dev, nvalue, flags). find_stations lists the stations carrying a variable, near a place, in a box or by name -- use it to turn "Hyltemossa" into HTM150. 2. estimate before get_data: it says how many rows a selection has. 3. For a mean, total, range or count, call aggregate -- it computes over the WHOLE selection on the server, by station, day, month or year. Never average rows from get_data yourself: get_data returns at most a few thousand rows, for looking at; for anything larger give the user its download_url. 4. The ecosystem fluxes NEE, GPP and RECO are served by /query as their PRESCRIBED reference slices -- NEE_VUT_REF (variable u* threshold, reference variant), GPP_NT_VUT_REF and RECO_NT_VUT_REF (night-time partitioning). Use those. The other variants (CUT, the u* percentiles, daytime partitioning) live in the zarr cubes NEE, GPP and RECO: search_variables lists them with access "zarr", and describe_variable gives the xarray line that reads any slice. Their UNITS differ by store: icos-fluxnet's daily/weekly/monthly/yearly NEE is gC m-2 d-1 (yearly gC m-2 y-1), the near-real-time icos-eco-nrt NEE is umol m-2 s-1 per half-hour -- say which when comparing. 5. The released stores (icos-fluxnet, icos-obspack releases) end months before today. For the latest days or weeks -- "this week", "latest", "recent" -- use the near-real-time data: icos-eco-nrt for ecosystem fluxes and meteorology, the NRT tail of icos-obspack for gases. 6. Two ocean stores, easily confused: icos-socat is the ICOS OCEAN NETWORK's own release (ICOS ships and stations, ICOS Ocean Level 2, its own DOI) -- "ICOS ocean data" means this one; socat is the GLOBAL SOCAT synthesis (every contributor worldwide, SOCAT v2026, the SOCAT DOI) -- "SOCAT" means this one, and socat-gridded is its monthly 1x1 degree grid. Cite the store you actually used. 7. For a gridded product, estimate's rows ARE the grid cells with data: that number answers "how many cells", do not count them by hand. 8. Always cite: every data answer carries the citation, licence (CC BY 4.0) and DOI. Pass them on to the user. Station ids are CASE-SENSITIVE: atmosphere stations are a trigram plus the sampling height (HTM150 = Hyltemossa, 150 m), FLUXNET sites are mixed-case site codes (SE-Htm).

Tools

8 advertised

list_datasets
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

List the ICOS datasets: one per data store, with domain (atmosphere, ocean, ecosystem), time and space coverage, licence and DOI.

list_datasets input schema
{
  "type": "object",
  "title": "list_datasetsArguments",
  "properties": {}
}
list_datasets output schema
{
  "type": "object",
  "$defs": {
    "Dataset": {
      "type": "object",
      "title": "Dataset",
      "required": [
        "store",
        "title",
        "domain",
        "n_variables",
        "agent_guide_url",
        "croissant_url"
      ],
      "properties": {
        "doi": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "Doi",
          "default": null
        },
        "store": {
          "type": "string",
          "title": "Store"
        },
        "title": {
          "type": "string",
          "title": "Title"
        },
        "domain": {
          "type": "string",
          "title": "Domain"
        },
        "lat_max": {
          "anyOf": [
            {
              "type": "number"
            },
            {
              "type": "null"
            }
          ],
          "title": "Lat Max",
          "default": null
        },
        "lat_min": {
          "anyOf": [
            {
              "type": "number"
            },
            {
              "type": "null"
            }
          ],
          "title": "Lat Min",
          "default": null
        },
        "license": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "License",
          "default": null
        },
        "lon_max": {
          "anyOf": [
            {
              "type": "number"
            },
            {
              "type": "null"
            }
          ],
          "title": "Lon Max",
          "default": null
        },
        "lon_min": {
          "anyOf": [
            {
              "type": "number"
            },
            {
              "type": "null"
            }
          ],
          "title": "Lon Min",
          "default": null
        },
        "summary": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "Summary",
          "default": null
        },
        "n_variables": {
          "type": "integer",
          "title": "N Variables",
          "description": "variables queryable through estimate and get_data; 0 means the store is read with xarray only (see its agent guide)"
        },
        "croissant_url": {
          "type": "string",
          "title": "Croissant Url"
        },
        "agent_guide_url": {
          "type": "string",
          "title": "Agent Guide Url"
        },
        "time_coverage_end": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "Time Coverage End",
          "default": null
        },
        "time_coverage_start": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "Time Coverage Start",
          "default": null
        }
      }
    }
  },
  "title": "Datasets",
  "required": [
    "datasets"
  ],
  "properties": {
    "datasets": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/Dataset"
      },
      "title": "Datasets"
    }
  }
}
list_datasets annotations
{
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}
search_variables
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

Find variable ids in the ICOS catalogue by name, quantity or unit. The ids are what estimate and get_data take. Primary measurements come before their companions (standard deviation, value counts, flags).

search_variables input schema
{
  "type": "object",
  "title": "search_variablesArguments",
  "required": [
    "text"
  ],
  "properties": {
    "text": {
      "type": "string",
      "title": "Text",
      "description": "what to look for: a gas, a quantity or a name, e.g. 'co2', 'methane', 'net ecosystem exchange', 'fCO2'"
    },
    "limit": {
      "type": "integer",
      "title": "Limit",
      "default": 15,
      "maximum": 50,
      "minimum": 1
    },
    "store": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Store",
      "default": null,
      "description": "limit to one store, e.g. icos-obspack.zarr"
    },
    "domain": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Domain",
      "default": null,
      "description": "atmosphere, ocean or ecosystem"
    }
  }
}
search_variables output schema
{
  "type": "object",
  "$defs": {
    "Variable": {
      "type": "object",
      "title": "Variable",
      "required": [
        "id",
        "name",
        "store",
        "query_kind"
      ],
      "properties": {
        "id": {
          "type": "string",
          "title": "Id"
        },
        "axes": {
          "anyOf": [
            {
              "type": "object",
              "additionalProperties": {
                "type": "array",
                "items": {
                  "type": "string"
                }
              }
            },
            {
              "type": "null"
            }
          ],
          "title": "Axes",
          "default": null,
          "description": "zarr variables: each extra axis and its labels"
        },
        "name": {
          "type": "string",
          "title": "Name"
        },
        "unit": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "Unit",
          "default": null
        },
        "store": {
          "type": "string",
          "title": "Store"
        },
        "access": {
          "enum": [
            "query",
            "zarr"
          ],
          "type": "string",
          "title": "Access",
          "default": "query",
          "description": "query: estimate/get_data/aggregate serve it; zarr: a multi-dimensional variable (e.g. the ONEFlux NEE cube) read with xarray -- see zarr_recipe, and `prescribed` for its /query slice"
        },
        "domain": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "Domain",
          "default": null
        },
        "long_name": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "Long Name",
          "default": null
        },
        "prescribed": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "Prescribed",
          "default": null,
          "description": "zarr variables: the id of the preferred slice /query serves"
        },
        "query_kind": {
          "type": "string",
          "title": "Query Kind",
          "description": "station_time (series at stations), obs_table (ship/cruise observations) or grid (gridded product)"
        },
        "zarr_recipe": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "Zarr Recipe",
          "default": null
        },
        "quality_flag": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "Quality Flag",
          "default": null
        },
        "vocabulary_uri": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "Vocabulary Uri",
          "default": null
        }
      }
    }
  },
  "title": "Variables",
  "required": [
    "variables",
    "n_matches"
  ],
  "properties": {
    "n_matches": {
      "type": "integer",
      "title": "N Matches"
    },
    "variables": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/Variable"
      },
      "title": "Variables"
    }
  }
}
search_variables annotations
{
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}
describe_variable
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

One variable in full: names, unit, which dataset, its coverage, how its quality flag is read, licence and DOI. For a multi-dimensional variable read through zarr (access 'zarr'), its axes with their labels, the slice /query serves (prescribed) and an xarray line for any other slice.

describe_variable input schema
{
  "type": "object",
  "title": "describe_variableArguments",
  "required": [
    "id"
  ],
  "properties": {
    "id": {
      "type": "string",
      "title": "Id",
      "description": "a variable id from search_variables"
    }
  }
}
describe_variable output schema
{
  "type": "object",
  "title": "VariableDetail",
  "required": [
    "id",
    "name",
    "store",
    "query_kind",
    "dataset_title"
  ],
  "properties": {
    "id": {
      "type": "string",
      "title": "Id"
    },
    "doi": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Doi",
      "default": null
    },
    "axes": {
      "anyOf": [
        {
          "type": "object",
          "additionalProperties": {
            "type": "array",
            "items": {
              "type": "string"
            }
          }
        },
        {
          "type": "null"
        }
      ],
      "title": "Axes",
      "default": null,
      "description": "zarr variables: each extra axis and its labels"
    },
    "name": {
      "type": "string",
      "title": "Name"
    },
    "unit": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Unit",
      "default": null
    },
    "store": {
      "type": "string",
      "title": "Store"
    },
    "access": {
      "enum": [
        "query",
        "zarr"
      ],
      "type": "string",
      "title": "Access",
      "default": "query",
      "description": "query: estimate/get_data/aggregate serve it; zarr: a multi-dimensional variable (e.g. the ONEFlux NEE cube) read with xarray -- see zarr_recipe, and `prescribed` for its /query slice"
    },
    "domain": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Domain",
      "default": null
    },
    "license": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "License",
      "default": null
    },
    "variants": {
      "anyOf": [
        {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        {
          "type": "null"
        }
      ],
      "title": "Variants",
      "default": null,
      "description": "the multi-dimensional variables this one is the PRESCRIBED slice of; their other slices are read through zarr (describe_variable on one gives the recipe)"
    },
    "long_name": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Long Name",
      "default": null
    },
    "prescribed": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Prescribed",
      "default": null,
      "description": "zarr variables: the id of the preferred slice /query serves"
    },
    "query_kind": {
      "type": "string",
      "title": "Query Kind",
      "description": "station_time (series at stations), obs_table (ship/cruise observations) or grid (gridded product)"
    },
    "zarr_recipe": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Zarr Recipe",
      "default": null
    },
    "quality_flag": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Quality Flag",
      "default": null
    },
    "dataset_title": {
      "type": "string",
      "title": "Dataset Title"
    },
    "vocabulary_uri": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Vocabulary Uri",
      "default": null
    },
    "quality_control": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Quality Control",
      "default": null,
      "description": "how the store's QC flag is read; apply_qc=true applies the recommended rule"
    },
    "time_coverage_end": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Time Coverage End",
      "default": null
    },
    "time_coverage_start": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Time Coverage Start",
      "default": null
    }
  }
}
describe_variable annotations
{
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}
estimate
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

How big a selection is -- rows, stations, time span -- without fetching it. Call this before get_data.

estimate input schema
{
  "type": "object",
  "title": "estimateArguments",
  "required": [
    "id"
  ],
  "properties": {
    "id": {
      "type": "string",
      "title": "Id",
      "description": "a variable id from search_variables"
    },
    "end": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "End",
      "default": null,
      "description": "ISO date or datetime, EXCLUSIVE"
    },
    "start": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Start",
      "default": null,
      "description": "ISO date or datetime, inclusive (2025-01-01)"
    },
    "cruise": {
      "anyOf": [
        {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Cruise",
      "default": null,
      "description": "cruise expocodes, a list or a string; ocean observation tables only"
    },
    "lat_max": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 90,
          "minimum": -90
        },
        {
          "type": "null"
        }
      ],
      "title": "Lat Max",
      "default": null
    },
    "lat_min": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 90,
          "minimum": -90
        },
        {
          "type": "null"
        }
      ],
      "title": "Lat Min",
      "default": null
    },
    "lon_max": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 180,
          "minimum": -180
        },
        {
          "type": "null"
        }
      ],
      "title": "Lon Max",
      "default": null
    },
    "lon_min": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 180,
          "minimum": -180
        },
        {
          "type": "null"
        }
      ],
      "title": "Lon Min",
      "default": null
    },
    "station": {
      "anyOf": [
        {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Station",
      "default": null,
      "description": "station ids -- a list, or one id (or several, comma-separated) as a string; CASE-SENSITIVE: HTM150 (trigram + sampling height) for atmosphere, SE-Htm for FLUXNET sites"
    },
    "apply_qc": {
      "type": "boolean",
      "title": "Apply Qc",
      "default": true,
      "description": "DEFAULT TRUE: drop the observations the store's recommended quality control rejects; false keeps every observation, flagged ones included"
    },
    "height_max": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "title": "Height Max",
      "default": null
    },
    "height_min": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "title": "Height Min",
      "default": null
    }
  }
}
estimate output schema
{
  "type": "object",
  "title": "Estimate",
  "required": [
    "id",
    "rows",
    "exact"
  ],
  "properties": {
    "id": {
      "type": "string",
      "title": "Id"
    },
    "note": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Note",
      "default": null
    },
    "rows": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "title": "Rows",
      "description": "rows the selection holds; None when only an upper bound is known"
    },
    "exact": {
      "type": "boolean",
      "title": "Exact"
    },
    "time_max": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Time Max",
      "default": null
    },
    "time_min": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Time Min",
      "default": null
    },
    "est_bytes": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "title": "Est Bytes",
      "default": null
    },
    "n_stations": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "title": "N Stations",
      "default": null
    },
    "rows_at_most": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "title": "Rows At Most",
      "default": null
    }
  }
}
estimate annotations
{
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}
get_data
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

Observations for one variable, filtered by box, time, station, cruise, height and quality control. Returns at most max_rows rows as a table, the total, a download URL for the whole selection, and the citation the user must be given with any use of the data.

get_data input schema
{
  "type": "object",
  "title": "get_dataArguments",
  "required": [
    "id"
  ],
  "properties": {
    "id": {
      "type": "string",
      "title": "Id",
      "description": "a variable id from search_variables"
    },
    "end": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "End",
      "default": null,
      "description": "ISO date or datetime, EXCLUSIVE"
    },
    "start": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Start",
      "default": null,
      "description": "ISO date or datetime, inclusive (2025-01-01)"
    },
    "cruise": {
      "anyOf": [
        {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Cruise",
      "default": null,
      "description": "cruise expocodes, a list or a string; ocean observation tables only"
    },
    "lat_max": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 90,
          "minimum": -90
        },
        {
          "type": "null"
        }
      ],
      "title": "Lat Max",
      "default": null
    },
    "lat_min": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 90,
          "minimum": -90
        },
        {
          "type": "null"
        }
      ],
      "title": "Lat Min",
      "default": null
    },
    "lon_max": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 180,
          "minimum": -180
        },
        {
          "type": "null"
        }
      ],
      "title": "Lon Max",
      "default": null
    },
    "lon_min": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 180,
          "minimum": -180
        },
        {
          "type": "null"
        }
      ],
      "title": "Lon Min",
      "default": null
    },
    "station": {
      "anyOf": [
        {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Station",
      "default": null,
      "description": "station ids -- a list, or one id (or several, comma-separated) as a string; CASE-SENSITIVE: HTM150 (trigram + sampling height) for atmosphere, SE-Htm for FLUXNET sites"
    },
    "apply_qc": {
      "type": "boolean",
      "title": "Apply Qc",
      "default": true,
      "description": "DEFAULT TRUE: drop the observations the store's recommended quality control rejects; false keeps every observation, flagged ones included"
    },
    "max_rows": {
      "type": "integer",
      "title": "Max Rows",
      "default": 100,
      "maximum": 2000,
      "minimum": 1,
      "description": "rows to return; the whole selection is at download_url"
    },
    "height_max": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "title": "Height Max",
      "default": null
    },
    "height_min": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "title": "Height Min",
      "default": null
    }
  }
}
get_data output schema
{
  "type": "object",
  "$defs": {
    "Citation": {
      "type": "object",
      "title": "Citation",
      "properties": {
        "doi": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "Doi",
          "default": null
        },
        "license": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "License",
          "default": null
        },
        "sources": {
          "anyOf": [
            {
              "type": "array",
              "items": {
                "type": "string"
              }
            },
            {
              "type": "null"
            }
          ],
          "title": "Sources",
          "default": null,
          "description": "the citation of each data object the selection came from -- what to cite when there is no collection citation (near-real-time data)"
        },
        "citation": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "Citation",
          "default": null
        },
        "n_sources": {
          "anyOf": [
            {
              "type": "integer"
            },
            {
              "type": "null"
            }
          ],
          "title": "N Sources",
          "default": null,
          "description": "how many data objects the selection came from; in a data answer their citations are listed only when there are three or fewer -- get_citation (with the same stations) lists them all"
        },
        "license_url": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "License Url",
          "default": null
        },
        "selection_id": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "Selection Id",
          "default": null,
          "description": "stable id of this exact selection over this exact store version"
        },
        "store_version": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "Store Version",
          "default": null
        }
      },
      "description": "In data answers the author list is shortened (first author et al.);\nget_citation gives the full citation."
    }
  },
  "title": "Data",
  "required": [
    "id",
    "columns",
    "rows",
    "rows_returned",
    "rows_total",
    "truncated",
    "download_url",
    "citation"
  ],
  "properties": {
    "id": {
      "type": "string",
      "title": "Id"
    },
    "note": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Note",
      "default": null
    },
    "rows": {
      "type": "array",
      "items": {
        "type": "array",
        "items": {}
      },
      "title": "Rows"
    },
    "columns": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "title": "Columns"
    },
    "citation": {
      "$ref": "#/$defs/Citation"
    },
    "truncated": {
      "type": "boolean",
      "title": "Truncated"
    },
    "rows_total": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "title": "Rows Total",
      "description": "rows in the whole selection, when known"
    },
    "download_url": {
      "type": "string",
      "title": "Download Url",
      "description": "the selection as CSV when it fits one download; when it does not, the FIRST of download_urls"
    },
    "download_urls": {
      "anyOf": [
        {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        {
          "type": "null"
        }
      ],
      "title": "Download Urls",
      "default": null,
      "description": "when the selection is larger than one download (the proxy caps an answer at 500,000 rows): one CSV link per time window, together the WHOLE selection -- give the user all of them"
    },
    "rows_returned": {
      "type": "integer",
      "title": "Rows Returned"
    },
    "download_complete": {
      "type": "boolean",
      "title": "Download Complete",
      "default": true,
      "description": "false when no set of links could be planned to cover the whole selection; the note says what is missing"
    }
  }
}
get_data annotations
{
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}
get_citation
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

How to cite a variable's data: the citation text, licence and DOI from its data passport, and -- for a selection (stations, a time window, a box) -- every data object it came from, in full. Data answers carry a short citation and only the COUNT of their sources; this lists them.

get_citation input schema
{
  "type": "object",
  "title": "get_citationArguments",
  "required": [
    "id"
  ],
  "properties": {
    "id": {
      "type": "string",
      "title": "Id",
      "description": "a variable id from search_variables"
    },
    "end": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "End",
      "default": null,
      "description": "ISO date or datetime, EXCLUSIVE"
    },
    "start": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Start",
      "default": null,
      "description": "ISO date or datetime, inclusive (2025-01-01)"
    },
    "lat_max": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 90,
          "minimum": -90
        },
        {
          "type": "null"
        }
      ],
      "title": "Lat Max",
      "default": null
    },
    "lat_min": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 90,
          "minimum": -90
        },
        {
          "type": "null"
        }
      ],
      "title": "Lat Min",
      "default": null
    },
    "lon_max": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 180,
          "minimum": -180
        },
        {
          "type": "null"
        }
      ],
      "title": "Lon Max",
      "default": null
    },
    "lon_min": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 180,
          "minimum": -180
        },
        {
          "type": "null"
        }
      ],
      "title": "Lon Min",
      "default": null
    },
    "station": {
      "anyOf": [
        {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Station",
      "default": null,
      "description": "station ids -- a list, or one id (or several, comma-separated) as a string; CASE-SENSITIVE: HTM150 (trigram + sampling height) for atmosphere, SE-Htm for FLUXNET sites"
    }
  }
}
get_citation output schema
{
  "type": "object",
  "title": "Citation",
  "properties": {
    "doi": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Doi",
      "default": null
    },
    "license": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "License",
      "default": null
    },
    "sources": {
      "anyOf": [
        {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        {
          "type": "null"
        }
      ],
      "title": "Sources",
      "default": null,
      "description": "the citation of each data object the selection came from -- what to cite when there is no collection citation (near-real-time data)"
    },
    "citation": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Citation",
      "default": null
    },
    "n_sources": {
      "anyOf": [
        {
          "type": "integer"
        },
        {
          "type": "null"
        }
      ],
      "title": "N Sources",
      "default": null,
      "description": "how many data objects the selection came from; in a data answer their citations are listed only when there are three or fewer -- get_citation (with the same stations) lists them all"
    },
    "license_url": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "License Url",
      "default": null
    },
    "selection_id": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Selection Id",
      "default": null,
      "description": "stable id of this exact selection over this exact store version"
    },
    "store_version": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Store Version",
      "default": null
    }
  },
  "description": "In data answers the author list is shortened (first author et al.);\nget_citation gives the full citation."
}
get_citation annotations
{
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}
aggregate
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

Statistics over a WHOLE selection, computed on the server: count, mean, min, max, sum and standard deviation of one variable, overall or per station, year, month or day. Use this for any average, total, range or trend instead of reading rows. Any size: a selection over 500,000 rows is split by time on the server and merged exactly. `std` is the POPULATION standard deviation (ddof 0). `sum` adds the values as stored, which is a total only for values that are themselves totals per row: summing a RATE (umol m-2 s-1 per half-hour, gC m-2 d-1 per day) or a concentration gives no physical quantity -- for a flux total multiply the mean by the period.

aggregate input schema
{
  "type": "object",
  "title": "aggregateArguments",
  "required": [
    "id"
  ],
  "properties": {
    "by": {
      "enum": [
        "none",
        "station",
        "year",
        "month",
        "day",
        "station_year",
        "station_month"
      ],
      "type": "string",
      "title": "By",
      "default": "none",
      "description": "the groups: none (one result), station, a period, or both"
    },
    "id": {
      "type": "string",
      "title": "Id",
      "description": "a variable id from search_variables"
    },
    "end": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "End",
      "default": null,
      "description": "ISO date or datetime, EXCLUSIVE"
    },
    "start": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Start",
      "default": null,
      "description": "ISO date or datetime, inclusive (2025-01-01)"
    },
    "cruise": {
      "anyOf": [
        {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Cruise",
      "default": null,
      "description": "cruise expocodes, a list or a string; ocean observation tables only"
    },
    "lat_max": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 90,
          "minimum": -90
        },
        {
          "type": "null"
        }
      ],
      "title": "Lat Max",
      "default": null
    },
    "lat_min": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 90,
          "minimum": -90
        },
        {
          "type": "null"
        }
      ],
      "title": "Lat Min",
      "default": null
    },
    "lon_max": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 180,
          "minimum": -180
        },
        {
          "type": "null"
        }
      ],
      "title": "Lon Max",
      "default": null
    },
    "lon_min": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 180,
          "minimum": -180
        },
        {
          "type": "null"
        }
      ],
      "title": "Lon Min",
      "default": null
    },
    "station": {
      "anyOf": [
        {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Station",
      "default": null,
      "description": "station ids -- a list, or one id (or several, comma-separated) as a string; CASE-SENSITIVE: HTM150 (trigram + sampling height) for atmosphere, SE-Htm for FLUXNET sites"
    },
    "apply_qc": {
      "type": "boolean",
      "title": "Apply Qc",
      "default": true,
      "description": "DEFAULT TRUE: drop the observations the store's recommended quality control rejects; false keeps every observation, flagged ones included"
    },
    "height_max": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "title": "Height Max",
      "default": null
    },
    "height_min": {
      "anyOf": [
        {
          "type": "number"
        },
        {
          "type": "null"
        }
      ],
      "title": "Height Min",
      "default": null
    }
  }
}
aggregate output schema
{
  "type": "object",
  "$defs": {
    "Citation": {
      "type": "object",
      "title": "Citation",
      "properties": {
        "doi": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "Doi",
          "default": null
        },
        "license": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "License",
          "default": null
        },
        "sources": {
          "anyOf": [
            {
              "type": "array",
              "items": {
                "type": "string"
              }
            },
            {
              "type": "null"
            }
          ],
          "title": "Sources",
          "default": null,
          "description": "the citation of each data object the selection came from -- what to cite when there is no collection citation (near-real-time data)"
        },
        "citation": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "Citation",
          "default": null
        },
        "n_sources": {
          "anyOf": [
            {
              "type": "integer"
            },
            {
              "type": "null"
            }
          ],
          "title": "N Sources",
          "default": null,
          "description": "how many data objects the selection came from; in a data answer their citations are listed only when there are three or fewer -- get_citation (with the same stations) lists them all"
        },
        "license_url": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "License Url",
          "default": null
        },
        "selection_id": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "Selection Id",
          "default": null,
          "description": "stable id of this exact selection over this exact store version"
        },
        "store_version": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "Store Version",
          "default": null
        }
      },
      "description": "In data answers the author list is shortened (first author et al.);\nget_citation gives the full citation."
    }
  },
  "title": "Aggregate",
  "required": [
    "id",
    "variable",
    "by",
    "groups",
    "n_groups",
    "rows_used",
    "download_url",
    "citation"
  ],
  "properties": {
    "by": {
      "type": "string",
      "title": "By"
    },
    "id": {
      "type": "string",
      "title": "Id"
    },
    "note": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Note",
      "default": null
    },
    "unit": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Unit",
      "default": null
    },
    "groups": {
      "type": "array",
      "items": {
        "type": "object",
        "additionalProperties": true
      },
      "title": "Groups",
      "description": "one entry per group: its keys (station, period), n (finite values), and mean, min, max, sum, std over them (null when n is 0)"
    },
    "citation": {
      "$ref": "#/$defs/Citation"
    },
    "n_groups": {
      "type": "integer",
      "title": "N Groups"
    },
    "variable": {
      "type": "string",
      "title": "Variable"
    },
    "rows_used": {
      "type": "integer",
      "title": "Rows Used"
    },
    "download_url": {
      "type": "string",
      "title": "Download Url"
    },
    "download_urls": {
      "anyOf": [
        {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        {
          "type": "null"
        }
      ],
      "title": "Download Urls",
      "default": null
    },
    "download_complete": {
      "type": "boolean",
      "title": "Download Complete",
      "default": true
    }
  }
}
aggregate annotations
{
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}
find_stations
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

The stations that carry a variable: id, name, position, sampling height, country, ecosystem -- near a point (sorted by distance), in a box, by name or by country. The ids are what estimate and get_data take as station=.

find_stations input schema
{
  "type": "object",
  "title": "find_stationsArguments",
  "required": [
    "id"
  ],
  "properties": {
    "id": {
      "type": "string",
      "title": "Id",
      "description": "a station-based variable id from search_variables"
    },
    "text": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Text",
      "default": null,
      "description": "part of a station's id or name, e.g. 'Hyltemossa', 'HTM', 'Hyy'"
    },
    "limit": {
      "type": "integer",
      "title": "Limit",
      "default": 50,
      "maximum": 200,
      "minimum": 1
    },
    "country": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Country",
      "default": null,
      "description": "two-letter code, e.g. SE"
    },
    "lat_max": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 90,
          "minimum": -90
        },
        {
          "type": "null"
        }
      ],
      "title": "Lat Max",
      "default": null
    },
    "lat_min": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 90,
          "minimum": -90
        },
        {
          "type": "null"
        }
      ],
      "title": "Lat Min",
      "default": null
    },
    "lon_max": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 180,
          "minimum": -180
        },
        {
          "type": "null"
        }
      ],
      "title": "Lon Max",
      "default": null
    },
    "lon_min": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 180,
          "minimum": -180
        },
        {
          "type": "null"
        }
      ],
      "title": "Lon Min",
      "default": null
    },
    "near_lat": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 90,
          "minimum": -90
        },
        {
          "type": "null"
        }
      ],
      "title": "Near Lat",
      "default": null,
      "description": "search around this point, with near_lon and radius_km"
    },
    "near_lon": {
      "anyOf": [
        {
          "type": "number",
          "maximum": 180,
          "minimum": -180
        },
        {
          "type": "null"
        }
      ],
      "title": "Near Lon",
      "default": null
    },
    "radius_km": {
      "type": "number",
      "title": "Radius Km",
      "default": 300,
      "maximum": 20000,
      "exclusiveMinimum": 0
    }
  }
}
find_stations output schema
{
  "type": "object",
  "$defs": {
    "Station": {
      "type": "object",
      "title": "Station",
      "required": [
        "id"
      ],
      "properties": {
        "id": {
          "type": "string",
          "title": "Id",
          "description": "the id station= takes, case-sensitive"
        },
        "url": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "Url",
          "default": null
        },
        "name": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "Name",
          "default": null
        },
        "country": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "Country",
          "default": null
        },
        "latitude": {
          "anyOf": [
            {
              "type": "number"
            },
            {
              "type": "null"
            }
          ],
          "title": "Latitude",
          "default": null
        },
        "ecosystem": {
          "anyOf": [
            {
              "type": "string"
            },
            {
              "type": "null"
            }
          ],
          "title": "Ecosystem",
          "default": null
        },
        "elevation": {
          "anyOf": [
            {
              "type": "number"
            },
            {
              "type": "null"
            }
          ],
          "title": "Elevation",
          "default": null
        },
        "longitude": {
          "anyOf": [
            {
              "type": "number"
            },
            {
              "type": "null"
            }
          ],
          "title": "Longitude",
          "default": null
        },
        "distance_km": {
          "anyOf": [
            {
              "type": "number"
            },
            {
              "type": "null"
            }
          ],
          "title": "Distance Km",
          "default": null
        },
        "sampling_height": {
          "anyOf": [
            {
              "type": "number"
            },
            {
              "type": "null"
            }
          ],
          "title": "Sampling Height",
          "default": null,
          "description": "intake height above ground, m (atmosphere)"
        }
      }
    }
  },
  "title": "StationList",
  "required": [
    "variable",
    "stations",
    "n_matches"
  ],
  "properties": {
    "stations": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/Station"
      },
      "title": "Stations"
    },
    "variable": {
      "type": "string",
      "title": "Variable"
    },
    "n_matches": {
      "type": "integer",
      "title": "N Matches"
    }
  }
}
find_stations annotations
{
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}

Prompts

3 advertised

station_record — A station's record

Advertised by the server during the last successful anonymous check.

Plot or describe one station's time series.

quantity
No description
station
No description
period
No description
compare_stations — Compare stations

Advertised by the server during the last successful anonymous check.

Compare one quantity across several stations.

quantity
No description
stations
No description
period
No description
ocean_region — Ocean CO2 in a region

Advertised by the server during the last successful anonymous check.

What surface-ocean CO2 observations exist in a region.

region
No description
period
No description

Resources

3 advertised

catalogue

Advertised by the server during the last successful anonymous check.

every queryable variable of the public stores: id, names, unit, QC flag, store

catalogue URI
icos://catalogue

MIME type: application/json

llms_txt

Advertised by the server during the last successful anonymous check.

the service's own guide for language models

llms_txt URI
icos://llms.txt

MIME type: text/plain

data_passport

Advertised by the server during the last successful anonymous check.

what the data passport in every answer contains and how to cite

data_passport URI
icos://data-passport

MIME type: text/markdown

agent_guide

Advertised by the server during the last successful anonymous check.

how to open and read one ICOS store: layout, coordinates, QC, citation -- written for agents

agent_guide URI template
icos://stores/{store}/agent-guide

MIME type: application/json

croissant

Advertised by the server during the last successful anonymous check.

the store's Croissant (ML dataset) description: every queryable variable with its unit

croissant URI template
icos://stores/{store}/croissant

MIME type: application/ld+json

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks
1 of 1 (100%)
Average latency
1280 ms
95th percentile latency
1280 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 1280 ms · metadata changed · 8 tool(s), 3 resource(s), 2 resource template(s), 3 prompt(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http icos-carbon-portal-mcp https://mcp.icos-cp.eu/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).
Codex configuration
codex mcp add icos-carbon-portal-mcp --url https://mcp.icos-cp.eu/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable icos-carbon-portal-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "icos-carbon-portal-mcp": {
      "url": "https://mcp.icos-cp.eu/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "icos-carbon-portal-mcp": {
      "type": "streamableHttp",
      "url": "https://mcp.icos-cp.eu/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start icos-carbon-portal-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "icos-carbon-portal-mcp": {
      "type": "http",
      "url": "https://mcp.icos-cp.eu/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.
Gemini CLI configuration
gemini mcp add --transport http icos-carbon-portal-mcp https://mcp.icos-cp.eu/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.
Claude Desktop configuration
{
  "mcpServers": {
    "icos-carbon-portal-mcp": {
      "url": "https://mcp.icos-cp.eu/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.
Windsurf configuration
{
  "mcpServers": {
    "icos-carbon-portal-mcp": {
      "serverUrl": "https://mcp.icos-cp.eu/mcp"
    }
  }
}

Let your agent find its tools

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