Japan Finance Reference Checks

Measured conclusion: Deep-tested. L2 outcome: tools_ok.

Which JPY rate did Japan Customs publish for a date? Is a firm on an FSA list? Hosted. No advice.

Add to your agent

Copy this into your MCP client config:

{
  "mcpServers": {
    "Japan Finance Reference Checks": {
      "url": "https://jp-finance-production.mk-career-planning.workers.dev/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (7)

• catalog read-only

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

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world not declared

• jp_customs_fx read-only

  Which JPY rate did Japan Customs publish for this currency on this date? Input: ISO 4217 code and YYYY-MM-DD date. Returns status (valid/invalid/unknown), the inclusive effective period, the JPY rate as published with its base units (1 or 100), source URLs, retrieval and verification times and SHA-256 hashes. Dates from 2021-08-15. Unpublished periods and unlisted currencies return unknown. Reference for customs and bookkeeping only; not a market or remittance rate; no tax calculation.

  Parameters:

  • currency (required) — string — Uppercase ISO 4217 alpha-3 code, e.g. USD
  • date (required) — string — Calendar date YYYY-MM-DD (Japan), e.g. 2026-10-07

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• jp_fsa_registry_lookup read-only

  Is this business (name, registration or 13-digit corporate number) on a Japan FSA register or warning list? Exact match (optional domain) against FSA registers (financial instruments, crypto-asset exchange, electronic payment instruments, funds transfer, money lending) and warnings to unregistered businesses. Returns matches with registration type, entity tie (domain alone: unverified), name candidates and as-of dates. Stated scope only; no warning match is not proof none exists. No advice.

  Parameters:

  • name — string — Business name as written, e.g. 株式会社SBI証券 or Bybit Fintech Limited
  • domain — string — Optional domain or URL, e.g. example.com
  • number — string — Registration number (e.g. 関東財務局長(金商)第44号) or 13-digit corporate number

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• fsa_register_changes read-only

  Which entries were added to, dropped from, changed in or returned to Japan FSA registers and warning lists since a date? From this service's own record of list versions (the FSA publishes only current lists). Each change has the list, registration number, name as published (personal names withheld), before/after fields, observed_at and the list as-of date. Reasons are not published or inferred. History starts at tracking_since; free window: last 30 days.

  Parameters:

  • since (required) — string — ISO 8601 date or date-time with time zone, e.g. 2026-10-01 or 2026-10-01T00:00:00Z
  • list — string — Optional: one list id (fib, cae, epi, fts, ml, w_fib_dom, w_fib_ovs, w_fib_qii, w_cae_dom, w_cae_ovs) or registers / warnings; default all lists
  • limit — integer — Maximum number of changes, 1-500 (default 100)
  • change_type — string — Optional filter: added, no_longer_listed, details_changed or relisted

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

• fsa_enforcement_by_corporate_number read-only

  Which rows of the Japan FSA case list of adverse administrative actions (business improvement or suspension orders and similar, by the FSA and Local Finance Bureaus, fiscal 2002 to the list's as-of date) state this 13-digit corporate number? Rows as published: date, action type, legal basis, business type, lifted flag, with the list version, SHA-256 and the scope of what was checked. Zero rows is not_found_in_checked_records with that scope; after the as-of date is unknown. No name search.

  Parameters:

  • corporate_number (required) — string — 13-digit Japanese corporate number (houjin bangou), e.g. 3010401049814. The check digit is verified.
  • since — string — Optional: only actions published on or after this date (YYYY-MM-DD). A date after the list's as-of date returns unknown.

  Hints: read-only yes · destructive not declared · idempotent yes · open-world yes

• get_receipt 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 90 days after settlement.

  Parameters:

  • receipt_id (required) — string — The receipt_id returned with a paid result ("rcpt_" + 64 hex characters).

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world not declared

• jp_customs_fx_batch read-only

  Which JPY rates did Japan Customs publish for these 1-50 currency/date pairs? One call returns ordered per-item status, effective periods, JPY rates as published with base units (1 or 100), source URLs, retrieval and verification times and hashes, read from one dataset snapshot. Dates from 2021-08-15. Unpublished periods and unlisted currencies return unknown. Not charged if no item can be answered. No date selection, tax calculation, market or remittance rates, or forecasts.

  Parameters:

  • items (required) — array — 1 to 50 items {currency, date}; order kept, duplicates answered twice

  Hints: read-only yes · destructive not declared · idempotent not declared · open-world yes

Publisher website

Measured by MCPYP probing. Untested fields are omitted, never estimated. Listing is always free; MCPYP never proxies calls or stores user tokens.