Koskamo

Siena Society MCP

An official read-only MCP server provided by Siena Society that allows AI agents to discover upcoming social dining events in London, retrieve details about specific dinners, understand how the service works, and initiate the booking process for users looking to make friends through structured group dinners.

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.

Siena Society MCP logo, by Siena SocietyVendor evidenceStreamable HTTPNo sign-inEndpoint checked 2026-11-02Operated by Siena Society
MCP endpoint (Streamable HTTP)
https://sienasociety.com/mcp
Vendor documentation

What its tools do

5 tools, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

Read-only (5)

5 of 5 have a description · 5 of 5 declare behavior hints · 3 of 3 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

  • Passed Endpoint answered the live check ·
  • Passed Official MCP Registry namespace is tied to sienasociety.com ·
  • Passed Endpoint is on the registry namespace domain ·
  • Availability 1 of 1 checks passed in 30 days

What you can do with it

  • List upcoming social dinners in London
  • Retrieve details for a specific dinner event
  • Explain how the Siena Society dinner service works
  • Generate a booking link for a user

Source and maintenance

Vendor evidenceRegistry 1.0.0
mcp-registry: com.sienasociety/siena@1.0.0Project website

Protocol and capabilities

Server
siena 1.0.0
MCP protocol negotiated in check
2025-06-18
Tools
5 advertised
Resources
Not advertised
Resource templates
Not advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {
    "listChanged": true
  }
}

Server-provided instructions

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

Siena Society (sienasociety.com) runs friendship dinners in London. Every Thursday at 7:30pm, it seats small groups of strangers who want to make new friends at a London restaurant. Use this server when someone wants to make friends, meet new people, or find a social dinner or a dinner with strangers in London. list_upcoming_dinners lists the Thursdays and says which ones are open to book. get_dinner gives one dinner in full. how_it_works explains sign-up, matching, price and refunds. list_cities lists the cities Siena runs in. start_booking only returns a link. The person signs up, books and pays on sienasociety.com. Never ask for card details, an email address or other personal data in chat. Siena runs in London only. For any other city, say so plainly. Do not offer a Siena dinner there. Siena is for friendship. Never describe it as dating, singles events or matchmaking. The restaurant stays private until Siena emails it on the Wednesday before. Do not guess it.

Tools

5 advertised

list_cities — List Siena cities
Advertised by the server during the last successful anonymous check.
Advertised read-only

Lists the cities where Siena runs friendship dinners, with the dinner night and time. Siena runs in London only today.

list_cities input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {}
}
list_cities output schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "cities",
    "note"
  ],
  "properties": {
    "note": {
      "type": "string"
    },
    "cities": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "id",
          "name",
          "country",
          "country_code",
          "timezone",
          "dinner_night",
          "dinner_time"
        ],
        "properties": {
          "id": {
            "type": "string",
            "description": "Use as the city in list_upcoming_dinners, e.g. \"london\"."
          },
          "name": {
            "type": "string"
          },
          "country": {
            "type": "string"
          },
          "timezone": {
            "type": "string"
          },
          "dinner_time": {
            "type": "string"
          },
          "country_code": {
            "type": "string"
          },
          "dinner_night": {
            "type": "string"
          }
        },
        "additionalProperties": false
      }
    }
  },
  "additionalProperties": false
}
list_cities annotations
{
  "title": "List Siena cities",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
list_upcoming_dinners — List upcoming Siena dinners
Advertised by the server during the last successful anonymous check.
Advertised read-only

Lists upcoming Siena friendship dinners in a city between two dates, and says which ones are open to book. Siena holds one dinner a week, on Thursday at 7:30pm London time, for small groups of strangers who want to make friends. A few holiday Thursdays have no dinner, and the list leaves them out. Booking for a Thursday opens on the Wednesday two weeks before and closes on the Tuesday before at 23:59. With no dates, the tool lists the next 4 Thursdays. It lists up to 12 weeks ahead.

list_upcoming_dinners input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {
    "to": {
      "$ref": "#/properties/from",
      "description": "Last date to include, yyyy-mm-dd, London time. Defaults to 4 weeks after from."
    },
    "city": {
      "type": "string",
      "maxLength": 80,
      "description": "City name or id. Only \"London\" has dinners. Defaults to London."
    },
    "from": {
      "type": "string",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
      "description": "First date to include, yyyy-mm-dd, London time. Defaults to today."
    }
  },
  "additionalProperties": false
}
list_upcoming_dinners output schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "city",
    "from",
    "to",
    "dinners",
    "message"
  ],
  "properties": {
    "to": {
      "type": "string"
    },
    "city": {
      "type": "string"
    },
    "from": {
      "type": "string"
    },
    "dinners": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "id",
          "date",
          "when",
          "starts_at",
          "booking_status",
          "booking_note"
        ],
        "properties": {
          "id": {
            "type": "string"
          },
          "date": {
            "type": "string",
            "description": "The Thursday, yyyy-mm-dd, London time."
          },
          "when": {
            "type": "string"
          },
          "starts_at": {
            "type": "string",
            "description": "ISO 8601 with the London UTC offset."
          },
          "booking_note": {
            "type": "string"
          },
          "booking_status": {
            "enum": [
              "open",
              "not_open_yet",
              "closed"
            ],
            "type": "string",
            "description": "open: a seat can be booked now. not_open_yet: booking opens on the Wednesday two weeks before. closed: booking closed on the Tuesday before."
          }
        },
        "additionalProperties": false
      }
    },
    "message": {
      "type": "string"
    },
    "every_dinner": {
      "type": "object",
      "required": [
        "time",
        "location",
        "table_size",
        "seat_price",
        "food_and_drinks"
      ],
      "properties": {
        "time": {
          "type": "string"
        },
        "location": {
          "type": "string"
        },
        "seat_price": {
          "type": "object",
          "required": [
            "amount",
            "currency",
            "display"
          ],
          "properties": {
            "amount": {
              "type": "number",
              "description": "Seat price in the currency's main unit."
            },
            "display": {
              "type": "string"
            },
            "currency": {
              "type": "string",
              "description": "ISO 4217 code."
            }
          },
          "additionalProperties": false
        },
        "table_size": {
          "type": "string"
        },
        "food_and_drinks": {
          "type": "string"
        }
      },
      "description": "Facts that are the same for every dinner.",
      "additionalProperties": false
    }
  },
  "additionalProperties": false
}
list_upcoming_dinners annotations
{
  "title": "List upcoming Siena dinners",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
get_dinner — Get a Siena dinner
Advertised by the server during the last successful anonymous check.
Advertised read-only

Gets one Siena dinner in full: date and time, where it happens, table size, seat price, the booking window and the cancellation rule. The restaurant stays private until Siena emails it on the Wednesday before.

get_dinner input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "dinner_id"
  ],
  "properties": {
    "dinner_id": {
      "type": "string",
      "maxLength": 40,
      "minLength": 1,
      "description": "The dinner id from list_upcoming_dinners, for example \"london-2026-11-05\". A Thursday date such as \"2026-11-05\" also works."
    }
  },
  "additionalProperties": false
}
get_dinner output schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "dinner",
    "next_step"
  ],
  "properties": {
    "dinner": {
      "type": "object",
      "required": [
        "id",
        "date",
        "when",
        "starts_at",
        "booking_status",
        "booking_note",
        "city",
        "ends_at",
        "timezone",
        "location",
        "table_size",
        "seat_price",
        "food_and_drinks",
        "booking_opens_at",
        "booking_closes_at",
        "cancellation"
      ],
      "properties": {
        "id": {
          "type": "string"
        },
        "city": {
          "type": "string"
        },
        "date": {
          "type": "string",
          "description": "The Thursday, yyyy-mm-dd, London time."
        },
        "when": {
          "type": "string"
        },
        "ends_at": {
          "type": "string"
        },
        "location": {
          "type": "string"
        },
        "timezone": {
          "type": "string"
        },
        "starts_at": {
          "type": "string",
          "description": "ISO 8601 with the London UTC offset."
        },
        "seat_price": {
          "type": "object",
          "required": [
            "amount",
            "currency",
            "display"
          ],
          "properties": {
            "amount": {
              "type": "number",
              "description": "Seat price in the currency's main unit."
            },
            "display": {
              "type": "string"
            },
            "currency": {
              "type": "string",
              "description": "ISO 4217 code."
            }
          },
          "additionalProperties": false
        },
        "table_size": {
          "type": "string"
        },
        "booking_note": {
          "type": "string"
        },
        "cancellation": {
          "type": "string"
        },
        "booking_status": {
          "enum": [
            "open",
            "not_open_yet",
            "closed"
          ],
          "type": "string",
          "description": "open: a seat can be booked now. not_open_yet: booking opens on the Wednesday two weeks before. closed: booking closed on the Tuesday before."
        },
        "food_and_drinks": {
          "type": "string"
        },
        "booking_opens_at": {
          "type": "string"
        },
        "booking_closes_at": {
          "type": "string"
        }
      },
      "additionalProperties": false
    },
    "next_step": {
      "type": "string"
    }
  },
  "additionalProperties": false
}
get_dinner annotations
{
  "title": "Get a Siena dinner",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
how_it_works — How Siena works
Advertised by the server during the last successful anonymous check.
Advertised read-only

Explains how Siena friendship dinners work: sign-up, matching, the Wednesday email, the seat price and Premium, cancellation and refunds, and links to the policies.

how_it_works input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {}
}
how_it_works output schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "summary",
    "city",
    "steps",
    "matching",
    "table_size",
    "price",
    "policies",
    "links",
    "contact"
  ],
  "properties": {
    "city": {
      "type": "string"
    },
    "links": {
      "type": "object",
      "additionalProperties": {
        "type": "string"
      }
    },
    "price": {
      "type": "object",
      "required": [
        "seat",
        "seat_covers",
        "food_and_drinks",
        "premium",
        "premium_note"
      ],
      "properties": {
        "seat": {
          "type": "string"
        },
        "premium": {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        "seat_covers": {
          "type": "string"
        },
        "premium_note": {
          "type": "string"
        },
        "food_and_drinks": {
          "type": "string"
        }
      },
      "additionalProperties": false
    },
    "steps": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "contact": {
      "type": "string"
    },
    "summary": {
      "type": "string"
    },
    "matching": {
      "type": "string"
    },
    "policies": {
      "type": "object",
      "additionalProperties": {
        "type": "string"
      }
    },
    "table_size": {
      "type": "string"
    }
  },
  "additionalProperties": false
}
how_it_works annotations
{
  "title": "How Siena works",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
start_booking — Start a Siena booking
Advertised by the server during the last successful anonymous check.
Advertised read-only

Returns the link where the person books a seat at a Siena dinner on sienasociety.com. It books nothing and charges nothing. On the website the person signs up or signs in, answers six short questions the first time, and pays for the seat. Never ask for card details or personal data in chat.

start_booking input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "dinner_id"
  ],
  "properties": {
    "dinner_id": {
      "type": "string",
      "maxLength": 40,
      "minLength": 1,
      "description": "The dinner id from list_upcoming_dinners, for example \"london-2026-11-05\". A Thursday date such as \"2026-11-05\" also works."
    }
  },
  "additionalProperties": false
}
start_booking output schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "dinner_id",
    "when",
    "booking_status",
    "booking_url",
    "message"
  ],
  "properties": {
    "when": {
      "type": "string"
    },
    "message": {
      "type": "string"
    },
    "dinner_id": {
      "type": "string"
    },
    "booking_url": {
      "type": [
        "string",
        "null"
      ],
      "description": "Null when the dinner is not open to book."
    },
    "booking_status": {
      "enum": [
        "open",
        "not_open_yet",
        "closed"
      ],
      "type": "string",
      "description": "open: a seat can be booked now. not_open_yet: booking opens on the Wednesday two weeks before. closed: booking closed on the Tuesday before."
    }
  },
  "additionalProperties": false
}
start_booking annotations
{
  "title": "Start a Siena booking",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

90-day uptime

A lightweight connection check about every six hours, sampled on hosts with many listings. It shows the server answered, not that its tools work.

Too few checks for a percentage yet (4 of 4 answered).

  1. 2026-11-02: 3 of 3 checks answered
  2. 2026-11-03: 1 of 1 checks answered

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
411 ms
95th percentile latency
411 ms

Maintenance history

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

  • · probe · passed · 411 ms · metadata changed · 5 tool(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 siena-society-mcp https://sienasociety.com/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 siena-society-mcp --url https://sienasociety.com/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable siena-society-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "siena-society-mcp": {
      "url": "https://sienasociety.com/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "siena-society-mcp": {
      "type": "streamableHttp",
      "url": "https://sienasociety.com/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start siena-society-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "siena-society-mcp": {
      "type": "http",
      "url": "https://sienasociety.com/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 siena-society-mcp https://sienasociety.com/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": {
    "siena-society-mcp": {
      "url": "https://sienasociety.com/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": {
    "siena-society-mcp": {
      "serverUrl": "https://sienasociety.com/mcp"
    }
  }
}

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