Koskamo

Japan Corporate Number (NTA) MCP

An MCP server that relays and processes data from the National Tax Agency of Japan's Corporate Number System Web-API. It allows agents to look up corporate details by number or search by name, providing assignment dates, closure records, and candidate matches without requiring user accounts or API keys.

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.

Japan Corporate Number (NTA) MCP logo, by MK Career PlanningCommunity listingStreamable HTTPNo sign-inEndpoint checked 2026-11-07Published by MK Career Planning
MCP endpoint (Streamable HTTP)
https://jp-corporate-number-production.mk-career-planning.workers.dev/mcp
Vendor documentation

What its tools do

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

Read-only (4)

4 of 4 have a description · 4 of 4 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 ·
  • Availability 1 of 1 checks passed in 30 days

What you can do with it

  • Lookup corporate details by 13-digit number
  • Search corporate numbers by organization name
  • Retrieve closure dates and cause codes
  • Get change history for a corporate entity

Source and maintenance

Community listingRegistry 0.1.0
mcp-registry: io.github.mk-career-planning/jp-corporate-number@0.1.0Project website

Protocol and capabilities

Server
jp-corporate-number 0.1.0
MCP protocol negotiated in check
2025-11-25
Tools
4 advertised
Resources
Not advertised
Resource templates
Not advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {
    "listChanged": true
  }
}

Tools

4 advertised

catalog — Catalog: tools, prices and limits
Advertised by the server during the last successful anonymous check.
Advertised read-only

List the tools of this server with prices, data sources, licensing, daily limits and data freshness.

catalog input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "properties": {}
}
catalog output schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "server",
    "payment",
    "daily_limits",
    "paused",
    "tools",
    "legal",
    "terms"
  ],
  "properties": {
    "legal": {
      "type": "object",
      "properties": {},
      "additionalProperties": {}
    },
    "terms": {
      "type": "string",
      "description": "URL of the terms of service."
    },
    "tools": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "name",
          "price_usd",
          "description"
        ],
        "properties": {
          "name": {
            "type": "string"
          },
          "price_usd": {
            "type": "number",
            "description": "Price per call in USD (0 = free)."
          },
          "description": {
            "type": "string"
          }
        },
        "additionalProperties": {}
      },
      "description": "Every tool of this server with its price."
    },
    "paused": {
      "type": "object",
      "description": "Operator pause flags (true = paused).",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {
        "type": "boolean"
      }
    },
    "server": {
      "type": "object",
      "required": [
        "name",
        "version",
        "stage"
      ],
      "properties": {
        "name": {
          "type": "string"
        },
        "stage": {
          "type": "string"
        },
        "version": {
          "type": "string"
        }
      },
      "additionalProperties": {}
    },
    "payment": {
      "type": "object",
      "required": [
        "protocol",
        "network",
        "asset",
        "enabled"
      ],
      "properties": {
        "asset": {
          "type": "string"
        },
        "enabled": {
          "type": "boolean"
        },
        "network": {
          "type": "string"
        },
        "protocol": {
          "type": "string"
        }
      },
      "additionalProperties": {}
    },
    "provenance": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "source",
          "upstream_updated_at",
          "retrieved_at",
          "content_sha256",
          "parser_version",
          "fetch_status",
          "processed_by"
        ],
        "properties": {
          "source": {
            "type": "object",
            "required": [
              "publisher",
              "url"
            ],
            "properties": {
              "url": {
                "type": "string"
              },
              "publisher": {
                "type": "string"
              }
            },
            "description": "Publisher and URL of the upstream document or dataset.",
            "additionalProperties": {}
          },
          "fetch_status": {
            "enum": [
              "found",
              "empty",
              "stale",
              "unavailable",
              "unsupported"
            ],
            "type": "string",
            "description": "found / empty / stale / unavailable / unsupported (see catalog fetch_status_values)."
          },
          "processed_by": {
            "type": "string"
          },
          "retrieved_at": {
            "type": [
              "string",
              "null"
            ],
            "description": "When this service retrieved the upstream data (null if unknown)."
          },
          "content_sha256": {
            "type": [
              "string",
              "null"
            ]
          },
          "parser_version": {
            "type": "string"
          },
          "upstream_updated_at": {
            "type": [
              "string",
              "null"
            ],
            "description": "Update time stated by the upstream, or null when it states none."
          }
        },
        "description": "Freshness receipt for one upstream source.",
        "additionalProperties": {}
      },
      "description": "Freshness receipts for every upstream source used."
    },
    "daily_limits": {
      "type": "object",
      "properties": {},
      "description": "Daily limits of paid calls (calls, usd, timezone) or a misconfiguration notice.",
      "additionalProperties": {}
    },
    "fetch_status_values": {
      "type": "object",
      "propertyNames": {
        "type": "string"
      },
      "additionalProperties": {
        "type": "string"
      }
    }
  },
  "additionalProperties": {}
}
catalog annotations
{
  "readOnlyHint": true
}
nta_corporate_number_lookup — National Tax Agency record for a corporate number
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

What does Japan's National Tax Agency (NTA) publish for this 13-digit corporate number? Returns the name, furigana, English name, kind, location, assignment date and, when the record states it, the closure date with the recorded cause code and successor corporate number (no reason is inferred). Optional change history. Distinguishes not found in the NTA records from could not check. Carries the NTA Web-API source statement. Not an official result.

nta_corporate_number_lookup input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "corporate_number"
  ],
  "properties": {
    "include_history": {
      "anyOf": [
        {
          "type": "boolean"
        },
        {
          "enum": [
            "0",
            "1",
            "true",
            "false"
          ],
          "type": "string"
        }
      ],
      "description": "true: also return the NTA record of changes (name, location, closure), oldest first. Default false."
    },
    "corporate_number": {
      "type": "string",
      "maxLength": 20,
      "description": "13-digit Japanese corporate number (houjin bangou), e.g. 7000012050002. The check digit is verified; nothing is requested for an invalid number."
    }
  }
}
nta_corporate_number_lookup output schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "attribution",
    "legal_notice",
    "query",
    "registry",
    "status",
    "unknown_reason",
    "status_as_of",
    "last_observed_at",
    "source_url",
    "matched_records",
    "match_basis",
    "limitations",
    "record",
    "record_state",
    "closure",
    "history",
    "fetched_at",
    "answered_at",
    "provenance",
    "terms"
  ],
  "properties": {
    "query": {
      "type": "object",
      "required": [
        "corporate_number",
        "include_history"
      ],
      "properties": {
        "include_history": {
          "type": "boolean"
        },
        "corporate_number": {
          "type": "string"
        }
      },
      "additionalProperties": {}
    },
    "terms": {
      "type": "string",
      "description": "URL of the terms of service."
    },
    "record": {
      "anyOf": [
        {
          "type": "object",
          "required": [
            "corporate_number"
          ],
          "properties": {
            "corporate_number": {
              "type": [
                "string",
                "null"
              ]
            }
          },
          "additionalProperties": {}
        },
        {
          "type": "null"
        }
      ]
    },
    "status": {
      "enum": [
        "listed",
        "not_found_in_checked_records",
        "no_longer_listed_since",
        "expired",
        "unknown"
      ],
      "type": "string",
      "description": "listed / not_found_in_checked_records / unknown (see unknown_reason). A failure or a missing application ID is never reported as not found."
    },
    "closure": {
      "anyOf": [
        {
          "type": "object",
          "required": [
            "recorded",
            "close_date",
            "close_cause"
          ],
          "properties": {
            "recorded": {
              "type": "boolean"
            },
            "close_date": {
              "type": [
                "string",
                "null"
              ]
            },
            "close_cause": {
              "type": [
                "string",
                "null"
              ]
            }
          },
          "additionalProperties": {}
        },
        {
          "type": "null"
        }
      ]
    },
    "history": {
      "anyOf": [
        {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {},
            "additionalProperties": {}
          }
        },
        {
          "type": "null"
        }
      ]
    },
    "registry": {
      "type": "string"
    },
    "fetched_at": {
      "type": [
        "string",
        "null"
      ]
    },
    "provenance": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "source",
          "upstream_updated_at",
          "retrieved_at",
          "content_sha256",
          "parser_version",
          "fetch_status",
          "processed_by"
        ],
        "properties": {
          "source": {
            "type": "object",
            "required": [
              "publisher",
              "url"
            ],
            "properties": {
              "url": {
                "type": "string"
              },
              "publisher": {
                "type": "string"
              }
            },
            "description": "Publisher and URL of the upstream document or dataset.",
            "additionalProperties": {}
          },
          "fetch_status": {
            "enum": [
              "found",
              "empty",
              "stale",
              "unavailable",
              "unsupported"
            ],
            "type": "string",
            "description": "found / empty / stale / unavailable / unsupported (see catalog fetch_status_values)."
          },
          "processed_by": {
            "type": "string"
          },
          "retrieved_at": {
            "type": [
              "string",
              "null"
            ],
            "description": "When this service retrieved the upstream data (null if unknown)."
          },
          "content_sha256": {
            "type": [
              "string",
              "null"
            ]
          },
          "parser_version": {
            "type": "string"
          },
          "upstream_updated_at": {
            "type": [
              "string",
              "null"
            ],
            "description": "Update time stated by the upstream, or null when it states none."
          }
        },
        "description": "Freshness receipt for one upstream source.",
        "additionalProperties": {}
      },
      "description": "Freshness receipts for every upstream source used."
    },
    "source_url": {
      "type": "string"
    },
    "answered_at": {
      "type": "string"
    },
    "attribution": {
      "type": "object",
      "required": [
        "source_statement_ja",
        "source_statement_en",
        "notice_ja",
        "notice_en",
        "fetched_at",
        "retrieved_on",
        "notice_ja_with_date",
        "not_official_ja",
        "not_official_en",
        "source_url",
        "webapi_terms_url",
        "processed_by"
      ],
      "properties": {
        "notice_en": {
          "type": "string"
        },
        "notice_ja": {
          "type": "string"
        },
        "fetched_at": {
          "type": [
            "string",
            "null"
          ]
        },
        "source_url": {
          "type": "string"
        },
        "processed_by": {
          "type": "string"
        },
        "retrieved_on": {
          "type": [
            "string",
            "null"
          ]
        },
        "not_official_en": {
          "type": "string"
        },
        "not_official_ja": {
          "type": "string"
        },
        "webapi_terms_url": {
          "type": "string"
        },
        "notice_ja_with_date": {
          "type": [
            "string",
            "null"
          ]
        },
        "source_statement_en": {
          "type": "string"
        },
        "source_statement_ja": {
          "type": "string"
        }
      },
      "description": "Required source statement of the NTA Corporate Number System Web-API terms (Article 6; source_statement_ja is the required wording), the source notice with the retrieval date, and the statement that this is processed by MK Career Planning and is not an official government result. Keep it when you pass results on.",
      "additionalProperties": {}
    },
    "limitations": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "match_basis": {
      "enum": [
        "exact_id",
        "exact_name",
        "fuzzy_candidate",
        "none"
      ],
      "type": "string"
    },
    "legal_notice": {
      "type": "string"
    },
    "record_state": {
      "anyOf": [
        {
          "enum": [
            "closure_recorded",
            "no_closure_recorded",
            "record_withdrawn"
          ],
          "type": "string"
        },
        {
          "type": "null"
        }
      ]
    },
    "status_as_of": {
      "type": [
        "string",
        "null"
      ],
      "description": "lastUpdateDate stated by the NTA Web-API."
    },
    "unknown_reason": {
      "type": [
        "string",
        "null"
      ],
      "description": "One of upstream_not_configured, rate_capped, too_many_results, upstream_access_restricted, upstream_app_id_rejected, upstream_error, record_withdrawn when status is unknown."
    },
    "matched_records": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {},
        "additionalProperties": {}
      }
    },
    "last_observed_at": {
      "type": [
        "string",
        "null"
      ]
    }
  },
  "additionalProperties": {}
}
nta_corporate_number_lookup annotations
{
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true
}
nta_corporate_number_search — Corporate number candidates for an organization name (NTA)
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

Which Japanese corporate numbers could this organization name refer to? Searches the National Tax Agency (NTA) Web-API by name (prefix match after the legal form, with the NTA's fuzzy matching), optionally within a prefecture, and returns every candidate with corporate number, name, location and recorded closure date, marked exact_name or fuzzy_candidate. Never picks one for you. Carries the NTA Web-API source statement. Not an official result.

nta_corporate_number_search input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "name"
  ],
  "properties": {
    "name": {
      "type": "string",
      "maxLength": 100,
      "description": "Organization name in Japanese, 1-100 characters, e.g. 国税庁 or a company name. The legal form (株式会社 etc.) is removed before the prefix search."
    },
    "limit": {
      "type": "integer",
      "maximum": 50,
      "minimum": 1,
      "description": "Number of candidates to detail, 1-50 (default 20). candidate_corporate_numbers lists all of them (up to 200)."
    },
    "prefecture": {
      "type": "string",
      "maxLength": 20,
      "description": "Optional prefecture code 01-47 (e.g. 13) or name (Tokyo or 東京都) to narrow the search to that prefecture."
    }
  }
}
nta_corporate_number_search output schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "attribution",
    "legal_notice",
    "query",
    "status",
    "unknown_reason",
    "total",
    "returned",
    "truncated",
    "exact_name_matches",
    "candidate_corporate_numbers",
    "candidate_corporate_numbers_truncated",
    "candidates",
    "status_as_of",
    "source_url",
    "fetched_at",
    "answered_at",
    "limitations",
    "provenance",
    "terms"
  ],
  "properties": {
    "query": {
      "type": "object",
      "required": [
        "name",
        "prefecture",
        "limit"
      ],
      "properties": {
        "name": {
          "type": "string"
        },
        "limit": {
          "type": "number"
        },
        "prefecture": {
          "type": [
            "string",
            "null"
          ]
        }
      },
      "additionalProperties": {}
    },
    "terms": {
      "type": "string",
      "description": "URL of the terms of service."
    },
    "total": {
      "type": [
        "number",
        "null"
      ],
      "description": "Number of organizations the NTA counted for this search."
    },
    "status": {
      "enum": [
        "candidates_found",
        "no_candidates_found",
        "unknown"
      ],
      "type": "string",
      "description": "candidates_found / no_candidates_found / unknown (see unknown_reason). A failure is never reported as no candidates."
    },
    "returned": {
      "type": "number"
    },
    "truncated": {
      "type": "boolean"
    },
    "candidates": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "corporate_number",
          "name",
          "location",
          "close_date",
          "match_basis",
          "nta_record_url"
        ],
        "properties": {
          "name": {
            "type": [
              "string",
              "null"
            ]
          },
          "location": {
            "type": [
              "string",
              "null"
            ]
          },
          "close_date": {
            "type": [
              "string",
              "null"
            ]
          },
          "match_basis": {
            "enum": [
              "exact_name",
              "fuzzy_candidate"
            ],
            "type": "string"
          },
          "nta_record_url": {
            "type": "string"
          },
          "corporate_number": {
            "type": [
              "string",
              "null"
            ]
          }
        },
        "additionalProperties": {}
      }
    },
    "fetched_at": {
      "type": [
        "string",
        "null"
      ]
    },
    "provenance": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "source",
          "upstream_updated_at",
          "retrieved_at",
          "content_sha256",
          "parser_version",
          "fetch_status",
          "processed_by"
        ],
        "properties": {
          "source": {
            "type": "object",
            "required": [
              "publisher",
              "url"
            ],
            "properties": {
              "url": {
                "type": "string"
              },
              "publisher": {
                "type": "string"
              }
            },
            "description": "Publisher and URL of the upstream document or dataset.",
            "additionalProperties": {}
          },
          "fetch_status": {
            "enum": [
              "found",
              "empty",
              "stale",
              "unavailable",
              "unsupported"
            ],
            "type": "string",
            "description": "found / empty / stale / unavailable / unsupported (see catalog fetch_status_values)."
          },
          "processed_by": {
            "type": "string"
          },
          "retrieved_at": {
            "type": [
              "string",
              "null"
            ],
            "description": "When this service retrieved the upstream data (null if unknown)."
          },
          "content_sha256": {
            "type": [
              "string",
              "null"
            ]
          },
          "parser_version": {
            "type": "string"
          },
          "upstream_updated_at": {
            "type": [
              "string",
              "null"
            ],
            "description": "Update time stated by the upstream, or null when it states none."
          }
        },
        "description": "Freshness receipt for one upstream source.",
        "additionalProperties": {}
      },
      "description": "Freshness receipts for every upstream source used."
    },
    "source_url": {
      "type": "string"
    },
    "answered_at": {
      "type": "string"
    },
    "attribution": {
      "type": "object",
      "required": [
        "source_statement_ja",
        "source_statement_en",
        "notice_ja",
        "notice_en",
        "fetched_at",
        "retrieved_on",
        "notice_ja_with_date",
        "not_official_ja",
        "not_official_en",
        "source_url",
        "webapi_terms_url",
        "processed_by"
      ],
      "properties": {
        "notice_en": {
          "type": "string"
        },
        "notice_ja": {
          "type": "string"
        },
        "fetched_at": {
          "type": [
            "string",
            "null"
          ]
        },
        "source_url": {
          "type": "string"
        },
        "processed_by": {
          "type": "string"
        },
        "retrieved_on": {
          "type": [
            "string",
            "null"
          ]
        },
        "not_official_en": {
          "type": "string"
        },
        "not_official_ja": {
          "type": "string"
        },
        "webapi_terms_url": {
          "type": "string"
        },
        "notice_ja_with_date": {
          "type": [
            "string",
            "null"
          ]
        },
        "source_statement_en": {
          "type": "string"
        },
        "source_statement_ja": {
          "type": "string"
        }
      },
      "description": "Required source statement of the NTA Corporate Number System Web-API terms (Article 6; source_statement_ja is the required wording), the source notice with the retrieval date, and the statement that this is processed by MK Career Planning and is not an official government result. Keep it when you pass results on.",
      "additionalProperties": {}
    },
    "limitations": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "legal_notice": {
      "type": "string"
    },
    "status_as_of": {
      "type": [
        "string",
        "null"
      ]
    },
    "unknown_reason": {
      "anyOf": [
        {
          "enum": [
            "upstream_not_configured",
            "rate_capped",
            "too_many_results",
            "upstream_access_restricted",
            "upstream_app_id_rejected",
            "upstream_error"
          ],
          "type": "string"
        },
        {
          "type": "null"
        }
      ]
    },
    "exact_name_matches": {
      "type": "number"
    },
    "candidate_corporate_numbers": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Every candidate's corporate number kept by this service (up to 200), including those not detailed in candidates (never collapsed to one)."
    },
    "candidate_corporate_numbers_truncated": {
      "type": "boolean"
    }
  },
  "additionalProperties": {}
}
nta_corporate_number_search annotations
{
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true
}
get_receipt — Get receipt of a paid call
Advertised by the server during the last successful anonymous check.
Advertised read-only

Re-fetch the stored result of a settled paid call by its receipt_id, for when the response was lost after payment. Free. Unknown or unsettled receipt ids return RECEIPT_NOT_FOUND. Results are kept for 30 days after settlement.

get_receipt input schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "receipt_id"
  ],
  "properties": {
    "receipt_id": {
      "type": "string",
      "maxLength": 80,
      "minLength": 1,
      "description": "The receipt_id returned with a paid result (\"rcpt_\" + 64 hex characters)."
    }
  }
}
get_receipt output schema
{
  "type": "object",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "required": [
    "receipt_id",
    "tool",
    "settled_at",
    "payment",
    "result",
    "provenance",
    "terms"
  ],
  "properties": {
    "tool": {
      "type": "string",
      "description": "Name of the paid tool that produced the result."
    },
    "terms": {
      "type": "string",
      "description": "URL of the terms of service."
    },
    "result": {
      "description": "The stored result, exactly as returned by the paid call."
    },
    "payment": {
      "type": "object",
      "required": [
        "network",
        "transaction"
      ],
      "properties": {
        "network": {
          "type": [
            "string",
            "null"
          ]
        },
        "transaction": {
          "type": [
            "string",
            "null"
          ]
        }
      },
      "additionalProperties": {}
    },
    "provenance": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "source",
          "upstream_updated_at",
          "retrieved_at",
          "content_sha256",
          "parser_version",
          "fetch_status",
          "processed_by"
        ],
        "properties": {
          "source": {
            "type": "object",
            "required": [
              "publisher",
              "url"
            ],
            "properties": {
              "url": {
                "type": "string"
              },
              "publisher": {
                "type": "string"
              }
            },
            "description": "Publisher and URL of the upstream document or dataset.",
            "additionalProperties": {}
          },
          "fetch_status": {
            "enum": [
              "found",
              "empty",
              "stale",
              "unavailable",
              "unsupported"
            ],
            "type": "string",
            "description": "found / empty / stale / unavailable / unsupported (see catalog fetch_status_values)."
          },
          "processed_by": {
            "type": "string"
          },
          "retrieved_at": {
            "type": [
              "string",
              "null"
            ],
            "description": "When this service retrieved the upstream data (null if unknown)."
          },
          "content_sha256": {
            "type": [
              "string",
              "null"
            ]
          },
          "parser_version": {
            "type": "string"
          },
          "upstream_updated_at": {
            "type": [
              "string",
              "null"
            ],
            "description": "Update time stated by the upstream, or null when it states none."
          }
        },
        "description": "Freshness receipt for one upstream source.",
        "additionalProperties": {}
      },
      "description": "Freshness receipts for every upstream source used."
    },
    "receipt_id": {
      "type": "string",
      "description": "Receipt id of the settled paid call (\"rcpt_\" + 64 hex). Use with get_receipt."
    },
    "settled_at": {
      "type": [
        "string",
        "null"
      ]
    }
  },
  "additionalProperties": {}
}
get_receipt annotations
{
  "readOnlyHint": true
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

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
846 ms
95th percentile latency
846 ms

Maintenance history

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

  • · probe · passed · 846 ms · metadata changed · 4 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 japan-corporate-number-nta-mcp https://jp-corporate-number-production.mk-career-planning.workers.dev/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 japan-corporate-number-nta-mcp --url https://jp-corporate-number-production.mk-career-planning.workers.dev/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable japan-corporate-number-nta-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "japan-corporate-number-nta-mcp": {
      "url": "https://jp-corporate-number-production.mk-career-planning.workers.dev/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "japan-corporate-number-nta-mcp": {
      "type": "streamableHttp",
      "url": "https://jp-corporate-number-production.mk-career-planning.workers.dev/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start japan-corporate-number-nta-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "japan-corporate-number-nta-mcp": {
      "type": "http",
      "url": "https://jp-corporate-number-production.mk-career-planning.workers.dev/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 japan-corporate-number-nta-mcp https://jp-corporate-number-production.mk-career-planning.workers.dev/mcp

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.
Claude Desktop configuration
https://jp-corporate-number-production.mk-career-planning.workers.dev/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": {
    "japan-corporate-number-nta-mcp": {
      "serverUrl": "https://jp-corporate-number-production.mk-career-planning.workers.dev/mcp"
    }
  }
}

Let your agent find its tools

Find servers like Japan Corporate Number (NTA) MCP from your agent. Add Koskamo once to search the index for endpoints, access requirements, and client setup. Public discovery needs no key.

Connect Koskamo Explore workflows
See all 6,916