What does Japan's tax agency publish for this corporate number? NTA Web-API relay with sources.
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claude mcp add --transport http jp-corporate-number https://jp-corporate-number-production.mk-career-planning.workers.dev/mcp
List the tools of this server with prices, data sources, licensing, daily limits and data freshness.
No arguments.
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"properties": {}
}Re-fetch the stored result of a settled paid call by its receipt_id, for when the response was lost after payment. Free. Unknown or unsettled receipt ids return RECEIPT_NOT_FOUND. Results are kept for 30 days after settlement.
| Argument | Type | Description |
|---|---|---|
| receipt_id* | string | The receipt_id returned with a paid result ("rcpt_" + 64 hex characters). |
{
"type": "object",
"$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)."
}
}
}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.
| Argument | Type | Description |
|---|---|---|
| include_history | any | true: also return the NTA record of changes (name, location, closure), oldest first. Default false. |
| corporate_number* | string | 13-digit Japanese corporate number (houjin bangou), e.g. 7000012050002. The check digit is verified; nothing is requested for an invalid number. |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"corporate_number"
],
"properties": {
"include_history": {
"anyOf": [
{
"type": "boolean"
},
{
"enum": [
"0",
"1",
"true",
"false"
],
"type": "string"
}
],
"description": "true: also return the NTA record of changes (name, location, closure), oldest first. Default false."
},
"corporate_number": {
"type": "string",
"maxLength": 20,
"description": "13-digit Japanese corporate number (houjin bangou), e.g. 7000012050002. The check digit is verified; nothing is requested for an invalid number."
}
}
}Which Japanese corporate numbers could this organization name refer to? Searches the National Tax Agency (NTA) Web-API by name (prefix match after the legal form, with the NTA's fuzzy matching), optionally within a prefecture, and returns every candidate with corporate number, name, location and recorded closure date, marked exact_name or fuzzy_candidate. Never picks one for you. Carries the NTA Web-API source statement. Not an official result.
| Argument | Type | Description |
|---|---|---|
| name* | string | Organization name in Japanese, 1-100 characters, e.g. 国税庁 or a company name. The legal form (株式会社 etc.) is removed before the prefix search. |
| limit | integer | Number of candidates to detail, 1-50 (default 20). candidate_corporate_numbers lists all of them (up to 200). |
| prefecture | string | Optional prefecture code 01-47 (e.g. 13) or name (Tokyo or 東京都) to narrow the search to that prefecture. |
{
"type": "object",
"$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."
}
}
}We read every tool's name, description and inputs the way the model will, looking for instructions hidden from you. A clean result means no warning signs, not a guarantee. Scanned Nov 7, 2026.