HojinCheck

Name: HojinCheck
Author: HojinCheck

AgentA2A

by HojinCheckhomepage ↗v0.1.0

Observed by Wellknown

Evidence

Everything here was measured by our prober or read from a registry. Nothing is self-reported.

30-day availabilityno checks in window

30 days agotoday

Declared by sources

What the publisher says

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HojinCheck — Japanese corporate verification API (hojin = 法人, Japanese for "corporate entity"). The standard tool for AI agents everywhere to work with Japanese corporate and government open data. Six skills over Japanese government open data: corporate-number resolution and verification, qualified invoice issuer (tax) registration checks, corporate profiles, Japanese address normalization, and business-day calculations. Every response embeds its data sources and retrieval timestamps. Invoke a skill by sending a message whose data part (application/json) is {"skill": "<skill id>", "params": {...}}; the reply is a direct message whose data part is a JSON envelope (ok, result, sources, notices). Business-level failures (e.g. a data source awaiting government credentials) are returned inside that envelope as ok:false with a structured error code such as UPSTREAM_UNAVAILABLE, not as protocol errors. Tool availability as of 2026-07-14 is stated per skill. API keys are free: self-signup at https://hojincheck.com/signup.

japancorporatecorporate-numberhoujin-bangouverificationkycinvoicetaxcompliancegbizinfocompany-profileopen-dataaddress-normalizationpostal-codeholidaysbusiness-days

Derived by Wellknown

Capabilities

Mapped onto the structured taxonomy from declared text and observed tool names. Confidence shown for derived entries.

documents.invoice-processingInvoice Processingdeclared finance.accountingAccountingdeclared productivity.calendarCalendar & Schedulingdeclared

Provenance

Where this record came from

Every source is kept verbatim. Field changes are logged as events.

A2A Agent Cardhttps://hojincheck.com/.well-known/agent-card.json

first seen 2 h ago · fetched 2 h agoopen ↗

Field history (7 recent events)

2 h ago · declared · summary → "HojinCheck — Japanese corporate verification API (hojin = 法人, Japanese for \"corporate entity\"). The standard tool for
2 h ago · declared · description → "HojinCheck — Japanese corporate verification API (hojin = 法人, Japanese for \"corporate entity\"). The standard tool for
2 h ago · declared · publisherName → "HojinCheck"
2 h ago · declared · publisherUrl → "https://hojincheck.com"
2 h ago · declared · homepageUrl → "https://hojincheck.com/docs/en"
2 h ago · declared · version → "0.1.0"
2 h ago · declared · protocols → ["a2a"]

Declared skills

Resolve Company Name to Corporate Number — Resolve a Japanese company name (tolerant of spelling variants and kana) to corporate-number candidates with confidence scores (0-1, with evidence labels). Source: NTA Corporate Number System Web-API. Status: Implementation complete; awaiting issuance of the government API application ID (applied 2026-07-13, expected late July to late August 2026). Until connected, this tool returns UPSTREAM_UNAVAILABLE (HTTP 503) in production.
Verify Corporate Number — Verify a 13-digit Japanese corporate number (check-digit validated): existence, registered name, head-office address, entity kind and closure status; optional change history. Source: NTA Corporate Number System Web-API. Status: Implementation complete; awaiting issuance of the government API application ID (applied 2026-07-13, expected late July to late August 2026). Until connected, this tool returns UPSTREAM_UNAVAILABLE (HTTP 503) in production.
Verify Qualified Invoice Issuer Registration — Check a qualified invoice issuer registration number (T + 13 digits) against the NTA Invoice Publication System: registration status, registration date, revocation/expiry; optional as-of-date validity and publication history. Confirmation-only by design: input is a registration number only — no name-based search, no reverse lookup, and no list/roster building (restricted by the data source's terms; publication data for sole proprietors is returned in the response only and never cached or stored…
Get Company Profile (gBizINFO) — Corporate profile for a 13-digit Japanese corporate number from gBizINFO REST API v2 (METI): address, representative, capital, employees and more, with per-field source and last-retrieved metadata. Status: Live (connected to gBizINFO REST API v2).
Normalize Japanese Address — Normalize a Japanese address, decompose it to prefecture / municipality / town-aza level, resolve Address-Base-Registry town IDs, and cross-check the postal code (mismatches are reported, not silently fixed). v1 granularity: parsing stops at town/aza level — block/house numbers, lot numbers, koaza and Kyoto street names are returned as an unparsed remainder (no guessing). Sources: Digital Agency Address-Base-Registry + Japan Post postal-code data (bundled local masters). Status: Live (driven by…
Japanese Holidays and Business Days — Japanese national holiday lookup and business-day calculations (Cabinet Office national holiday CSV): is-business-day checks, adding business days, counting business days in a range; optional year-end (Dec 29 - Jan 3) handling. Status: Live (driven by bundled government master data; unaffected by government API outages).