Japan Corporate-Number (法人番号) API
payment-ready until 2026-10-17
Look up, search, and name-match Japanese corporations against the official 国税庁 (National Tax Agency) corporate-number registry. x402-enabled for AI agents doing KYC, vendor reconciliation (名寄せ), invoice verification, or company research in Japan.
Part of the Agentic JP operator hub
Call it x402 v2
x402 v2
- Base URL
- https://houjin.agentic-jp.com
- Payment
- x402 v2, header channel
$ curl -i 'https://houjin.agentic-jp.com/corporation/7010401052137' An unpaid request returns HTTP 402 with the payment terms. Sign a payment authorization, then retry with the PAYMENT-SIGNATURE header.
Endpoints 6 paid routes on houjin.agentic-jp.com
Prices as captured in the 402 response: median $0.005 across the 6 endpoints, unchanged since first capture.
Example 402 response
Endpoints and prices
| Method | Path | Description | Price | Network | Asset | 402 channel | Captured |
|---|---|---|---|---|---|---|---|
| POST | / | No description | $0.0032 | Base+ | USDC | header | since 09-23 |
| GET | / | No description | $0.005 | Base+ | USDC | header | since 09-23 |
| POST | / | No description | $0.25 | Base+ | USDC | header | since 09-23 |
| POST | / | No description | $0.015 | Base+ | USDC | header | since 09-23 |
| GET | / | No description | $0.001 | Base+ | USDC | header | since 09-23 |
| POST | / | No description | $0.005 | Base+ | USDC | header | since 09-23 |
Payment evidence
402 payload captured at . Check evidence JSON · Measurement methodology.
First of 6 payloads captured by the monitor.
150 lines, scroll inside
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"resource": "https://houjin.agentic-jp.com/corporation/:number"
},
"payTo": "0x38c9F689274E2fC3AE360744eF88ce212077a584",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2",
"resource": "https://houjin.agentic-jp.com/corporation/:number"
},
"payTo": "0x38c9F689274E2fC3AE360744eF88ce212077a584",
"amount": "5000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP",
"resource": "https://houjin.agentic-jp.com/corporation/:number"
},
"payTo": "2BTzdCAcCLaNA2SSZ1YjJvTtscNCpUMUEjLY3LyBpNMk",
"amount": "5000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://houjin.agentic-jp.com/corporation/:number",
"mimeType": "application/json",
"description": "Japanese company lookup by 13-digit corporate number (法人番号) — official trade name (Japanese and registered English), registered address, postal code, corporation kind, and lifecycle status. `status` is \"active\" or \"closed\"; a closed record carries the closure cause/date and the successor's 法人番号 after a merger. Sourced from the 国税庁 (National Tax Agency) corporate registry. The leading check digit is validated before lookup."
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"pathParams": {
"number": "7010401052137"
},
"queryParams": {}
},
"output": {
"type": "json",
"example": {
"city": "港区",
"name": "国立印刷局",
"status": "active",
"street": "虎ノ門二丁目2番5号",
"name_en": null,
"corp_kind": "101",
"name_kana": null,
"address_en": null,
"close_date": null,
"prefecture": "東京都",
"change_date": "2015-10-05",
"close_cause": null,
"postal_code": "1058445",
"update_date": "2018-04-02",
"address_full": "東京都港区虎ノ門二丁目2番5号",
"process_kind": "01",
"assignment_date": "2015-10-05",
"corp_kind_label": "National government agency",
"prefecture_code": "13",
"corporate_number": "7000012050002",
"close_cause_label": null,
"successor_corporate_number": null
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"pathParams": {
"type": "object",
"required": [
"number"
],
"properties": {
"number": {
"type": "string",
"description": "A 13-digit Japanese corporate number (法人番号). Hyphens/spaces are tolerated. The leading digit is a check digit; invalid numbers are rejected with 400 before any DB lookup."
}
}
},
"queryParams": {
"type": "object",
"properties": {}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
},
"routeTemplate": "/corporation/:number"
}
},
"x402Version": 2
} Other captured 402 responses (5)
Captured payload 2 of 6
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"resource": "https://houjin.agentic-jp.com/verify"
},
"payTo": "0x38c9F689274E2fC3AE360744eF88ce212077a584",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2",
"resource": "https://houjin.agentic-jp.com/verify"
},
"payTo": "0x38c9F689274E2fC3AE360744eF88ce212077a584",
"amount": "5000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP",
"resource": "https://houjin.agentic-jp.com/verify"
},
"payTo": "2BTzdCAcCLaNA2SSZ1YjJvTtscNCpUMUEjLY3LyBpNMk",
"amount": "5000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://houjin.agentic-jp.com/verify",
"mimeType": "application/json",
"description": "KYB / KYC verification of a Japanese company: reconcile a company name (+ optional address) against the official JP corporate registry (名寄せ). Returns ranked candidate 法人番号 with a 0-1 confidence score, handling 株式会社 / (株) / ㈱ spelling variation and matching Japanese or English names. A dissolved corporation is never reported as `verified` even on an exact name match. Use it to confirm a vendor, customer, or invoice counterparty."
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"city": "千代田区",
"name": "株式会社サンプル商事",
"prefecture": "東京都"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"best": {
"matched": {
"city": true,
"name": true,
"name_exact": true,
"prefecture": true
},
"confidence": 0.96,
"corporation": {
"city": "港区",
"name": "国立印刷局",
"status": "active",
"street": "虎ノ門二丁目2番5号",
"name_en": null,
"corp_kind": "101",
"name_kana": null,
"address_en": null,
"close_date": null,
"prefecture": "東京都",
"change_date": "2015-10-05",
"close_cause": null,
"postal_code": "1058445",
"update_date": "2018-04-02",
"address_full": "東京都港区虎ノ門二丁目2番5号",
"process_kind": "01",
"assignment_date": "2015-10-05",
"corp_kind_label": "National government agency",
"prefecture_code": "13",
"corporate_number": "7000012050002",
"close_cause_label": null,
"successor_corporate_number": null
}
},
"verified": true,
"candidates": [
{
"matched": {
"city": true,
"name": true,
"name_exact": true,
"prefecture": true
},
"confidence": 0.96,
"corporation": {
"city": "港区",
"name": "国立印刷局",
"status": "active",
"street": "虎ノ門二丁目2番5号",
"name_en": null,
"corp_kind": "101",
"name_kana": null,
"address_en": null,
"close_date": null,
"prefecture": "東京都",
"change_date": "2015-10-05",
"close_cause": null,
"postal_code": "1058445",
"update_date": "2018-04-02",
"address_full": "東京都港区虎ノ門二丁目2番5号",
"process_kind": "01",
"assignment_date": "2015-10-05",
"corp_kind_label": "National government agency",
"prefecture_code": "13",
"corporate_number": "7000012050002",
"close_cause_label": null,
"successor_corporate_number": null
}
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"required": [
"name"
],
"properties": {
"city": {
"type": "string",
"description": "City / ward, to disambiguate. Optional."
},
"name": {
"type": "string",
"description": "Corporation name to reconcile against the registry. Required."
},
"prefecture": {
"type": "string",
"description": "Prefecture, to disambiguate. Optional."
},
"corporate_number": {
"type": "string",
"description": "A 法人番号 the caller wants confirmed against the name/address. Optional."
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 3 of 6
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"resource": "https://houjin.agentic-jp.com/report"
},
"payTo": "0x38c9F689274E2fC3AE360744eF88ce212077a584",
"amount": "250000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2",
"resource": "https://houjin.agentic-jp.com/report"
},
"payTo": "0x38c9F689274E2fC3AE360744eF88ce212077a584",
"amount": "250000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP",
"resource": "https://houjin.agentic-jp.com/report"
},
"payTo": "2BTzdCAcCLaNA2SSZ1YjJvTtscNCpUMUEjLY3LyBpNMk",
"amount": "250000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://houjin.agentic-jp.com/report",
"mimeType": "application/json",
"description": "Japanese company KYB report in one call — company lookup + verification from a corporate number or company name. Returns the official 国税庁 registry record, lifecycle status, kana + romaji name readings, risk flags (closed registry, recent registration/changes), an English summary, and the dataset vintage. Use for counterparty due diligence, supplier onboarding, or invoice fraud checks — replaces 3-4 separate lookups."
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"corporate_number": "7000012050002"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"status": "active",
"data_as_of": "2026-05-14",
"resolution": {
"method": "corporate_number"
},
"risk_flags": [],
"summary_en": "国税庁 is an active government agency registered in 東京都, 千代田区; no risk flags.",
"name_readings": {
"kana": "コクゼイチョウ",
"romaji": "kokuzeichou"
},
"corporate_number": "7000012050002"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"properties": {
"city": {
"type": "string",
"description": "Optional city/ward filter for name resolution"
},
"name": {
"type": "string",
"maxLength": 128,
"description": "Company trade name (Japanese or English) to resolve when the number is unknown"
},
"prefecture": {
"type": "string",
"description": "Optional prefecture filter for name resolution"
},
"corporate_number": {
"type": "string",
"description": "13-digit Japanese corporate number (法人番号). Either this or `name` is required."
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 4 of 6
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"resource": "https://houjin.agentic-jp.com/stats"
},
"payTo": "0x38c9F689274E2fC3AE360744eF88ce212077a584",
"amount": "1000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2",
"resource": "https://houjin.agentic-jp.com/stats"
},
"payTo": "0x38c9F689274E2fC3AE360744eF88ce212077a584",
"amount": "1000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP",
"resource": "https://houjin.agentic-jp.com/stats"
},
"payTo": "2BTzdCAcCLaNA2SSZ1YjJvTtscNCpUMUEjLY3LyBpNMk",
"amount": "1000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://houjin.agentic-jp.com/stats",
"mimeType": "application/json",
"description": "Dataset metadata for this Japanese (JP) corporate-number API — how many corporations are loaded and which prefectures are covered."
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {}
},
"output": {
"type": "json",
"example": {
"loaded": true,
"data_source": "国税庁 法人番号公表サイト",
"prefectures": [
"東京都"
],
"prefecture_count": 1,
"corporation_count": 1074321
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 5 of 6
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"resource": "https://houjin.agentic-jp.com/search"
},
"payTo": "0x38c9F689274E2fC3AE360744eF88ce212077a584",
"amount": "15000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2",
"resource": "https://houjin.agentic-jp.com/search"
},
"payTo": "0x38c9F689274E2fC3AE360744eF88ce212077a584",
"amount": "15000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP",
"resource": "https://houjin.agentic-jp.com/search"
},
"payTo": "2BTzdCAcCLaNA2SSZ1YjJvTtscNCpUMUEjLY3LyBpNMk",
"amount": "15000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://houjin.agentic-jp.com/search",
"mimeType": "application/json",
"description": "Japanese company search: look up companies in the official JP corporate registry by trade name and/or location. Partial-name match on both the Japanese and registered English name, with width/abbreviation normalization, filterable by prefecture, city, and corporation kind. Returns up to 50 corporations with their 法人番号 and lifecycle status. Dynamic pricing: a base fee plus a small per-result fee."
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"name": "トヨタ",
"limit": 20,
"prefecture": "愛知県"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"count": 1,
"results": [
{
"city": "港区",
"name": "国立印刷局",
"status": "active",
"street": "虎ノ門二丁目2番5号",
"name_en": null,
"corp_kind": "101",
"name_kana": null,
"address_en": null,
"close_date": null,
"prefecture": "東京都",
"change_date": "2015-10-05",
"close_cause": null,
"postal_code": "1058445",
"update_date": "2018-04-02",
"address_full": "東京都港区虎ノ門二丁目2番5号",
"process_kind": "01",
"assignment_date": "2015-10-05",
"corp_kind_label": "National government agency",
"prefecture_code": "13",
"corporate_number": "7000012050002",
"close_cause_label": null,
"successor_corporate_number": null
}
],
"truncated": false
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"required": [],
"properties": {
"city": {
"type": "string",
"description": "City / ward substring (\"港区\")."
},
"name": {
"type": "string",
"description": "Partial trade-name match (商号の部分一致). Width/abbreviation normalized."
},
"limit": {
"type": "number",
"description": "Max results, 1-50 (default 50)."
},
"corp_kind": {
"type": "string",
"description": "3-digit corporation-kind code (e.g. \"301\" = stock company)."
},
"prefecture": {
"type": "string",
"description": "Prefecture name (\"東京都\") or JIS prefecture code (\"13\")."
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 6 of 6
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"resource": "https://houjin.agentic-jp.com/batch"
},
"payTo": "0x38c9F689274E2fC3AE360744eF88ce212077a584",
"amount": "3200",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2",
"resource": "https://houjin.agentic-jp.com/batch"
},
"payTo": "0x38c9F689274E2fC3AE360744eF88ce212077a584",
"amount": "3200",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP",
"resource": "https://houjin.agentic-jp.com/batch"
},
"payTo": "2BTzdCAcCLaNA2SSZ1YjJvTtscNCpUMUEjLY3LyBpNMk",
"amount": "3200",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://houjin.agentic-jp.com/batch",
"mimeType": "application/json",
"description": "Look up many Japanese (JP) corporate numbers (法人番号) in one request (up to 50). Dynamic pricing by item count with a volume discount."
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"items": [
{
"id": "a",
"corporate_number": "7000012050002"
},
{
"id": "b",
"corporate_number": "1010001000001"
}
]
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"count": 2,
"results": [
{
"id": "a",
"data": {
"city": "港区",
"name": "国立印刷局",
"status": "active",
"street": "虎ノ門二丁目2番5号",
"name_en": null,
"corp_kind": "101",
"name_kana": null,
"address_en": null,
"close_date": null,
"prefecture": "東京都",
"change_date": "2015-10-05",
"close_cause": null,
"postal_code": "1058445",
"update_date": "2018-04-02",
"address_full": "東京都港区虎ノ門二丁目2番5号",
"process_kind": "01",
"assignment_date": "2015-10-05",
"corp_kind_label": "National government agency",
"prefecture_code": "13",
"corporate_number": "7000012050002",
"close_cause_label": null,
"successor_corporate_number": null
},
"success": true
},
{
"id": "b",
"error": {
"code": "CORPORATION_NOT_FOUND",
"message": "No corporation with that number"
},
"success": false
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"required": [
"items"
],
"properties": {
"items": {
"type": "array",
"description": "Corporate numbers to look up in one call (max 50). Each item has an `id` (echoed back) and a 13-digit `corporate_number`."
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Can I trust it score from our own monitoring
score from our own monitoring
#67 of 362 in Data. Bands: strong 93+, solid 75+, mixed 55+, weak below 55.
- Reliability
- 99.9% uptime since 09-23
- Compliance
- A 14/14 checks pass
- Price
- $0.001 to $0.25 p10 in Data
- Risk
- clean no risk flag
- Traction
- $0.00 30d 0 buyers
14/14 compliance checks
- 402 payload captured
- accepts[] array present
- payTo address recoverable
- payTo at accepts[0].payTo (conformant shape)
- payTo is a valid on-chain address
- atomic price declared
- atomic price in a sane range
- asset (token) address declared
- network resolves to CAIP-2
- payment scheme declared
- served over HTTPS
- declares the current x402 version (2)
- EIP-712 domain parameters present on every EVM entry
- x402 v2 envelope delivered in the payment-required header
402 terms unchanged since 2026-09-23. Last up 2026-10-10.
── Site signals
- homepage reachable
- openapi doc
- pricing page
- llms.txt
- robots.txt
- terms page
How the score works
What the score read on this service: status online, 99.9% uptime 30d, 704ms response p95, x402 compliance 14 of 14, $0.001 price against the category, on-chain traction measured. Each of those is measured, and each is published in full below.
The score comes from our own monitoring, never from reviews, operator claims, or a language model: reliability, x402 compliance, price against the category, a deterministic risk flag, and a small on-chain traction term, weighted by ranking generation 3. It is not placement anyone can buy: the paid verify tier is reported beside it and is not one of its inputs. Every component below stays published and read-only.
Bands on the 0 to 100 measured score: strong at 93 and above, solid from 75, mixed from 55, weak below 55. Price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, so the score places a service in its own field.
It is a score inside Data, and only there: price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, which here means 362 listings, this one among them: the same 362 the position above is counted against. When the two differ, the field is the wider one, because a listing we have measured too little of to rank still sits in the field the price and the speed are normalized over. The same service in a different field would read differently. The same engine answers GET /api/v1/best, and asked for a different pool (the whole directory, or another filter) it returns a different number for this service under this same ranking generation. Neither is more correct: they answer different questions, and the methodology states which is which.
Traction is a conservative undercount.
All measured facts
What it does
Look up, search, and name-match Japanese corporations against the official 国税庁 (National Tax Agency) corporate-number registry. x402-enabled for AI agents doing KYC, vendor reconciliation (名寄せ), invoice verification, or company research in Japan.
Japan Corporate-Number (法人番号) API is a listed x402 Data API. Captured payment terms name Base, Polygon, Solana. Monitoring and settlement figures below describe the observations available to this directory; an unpaid HTTP 402 check does not prove that a paid call will deliver.
Assessment computed at . Latest service check observed at . Service data JSON · Measurement methodology.
Page rendered at . This response time is separate from the observation and computation times attached to each measurement.
Latest endpoint observation: . Latest price capture: . Prices are recorded quotes, not a promise of availability. Token assets and payment terms are listed separately. Endpoint data JSON · Price history JSON · Measurement methodology.
Assessment computed at . Uptime uses the stated daily-rollup window; response times are in milliseconds, compliance is passed/evaluated checks, and traction is a measured settlement floor. The comparison score is out of 100 within this category. Assessment JSON · Measurement methodology.
Observed daily coverage: 2026-09-11 to 2026-10-10 UTC. Daily monitoring and settlement rollups do not expose their computation time; a bucket date is not an update timestamp. Uptime and response JSON · Volume JSON · Buyers JSON · Measurement methodology.
Ranked from the measured category pool, refreshed at most once a minute. The comparison has no persisted computation timestamp; the assessment time above belongs to this service only. Ranking API documentation · Ranking methodology.
x402 List home · Services · Data
- uptime · latest daily rollup
- 100%
- uptime 7d
- 100%
- uptime 30d
- 99.9%
- uptime 90d
- 99.9%
- response p95
- 704ms
- avg response
- 616ms
- total checks
- 1,549
Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.
- price (min)
- $0.001
- price (max)
- $0.25
- category percentile (min)
- p10 in Data
- category percentile (max)
- p83 in Data
- endpoints / prices
- 6 / 5
- model
- tiered
- stability
- 100%
No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.
- domain age
- -
- registrar
- -
- hosting
- custom
- domain created
- ---
Identity facts, not a risk score.
- assessment volume 30d
- $0.00
- exact assessment volume 30d (USD)
- 0
- assessment recorded at (UTC)
- 2026-10-10T14:53:00.314Z
- buyers 30d
- 0
- settlements 30d
- 0
- measured since
- --- (start of our harvest window)
- last settlement
- ---
- top buyer share
- -
- top 3 buyers share
- -
- concentrated volume
- no
- trend 7d vs 30d
- -
- networks
- eip155:137, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpKuc147dw2N9d
- volume all-time
- $0
- settlements all-time
- 0
- median settlement 30d
- -
- max settlement 30d
- -
Assessment volume uses the latest 30d assessment. Over time sums daily address snapshots, rounded to cents and refreshed separately. The two sources can differ in timing, precision and shared-address attribution. Amounts use cents for comparison; known sub-cent values keep up to 12 significant digits. The exact stored assessment value is shown above.
Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.
Top buyer share lowers the on-chain traction part of the ranking score behind this page's verdict and /best, by up to half when one address holds all 30d volume. The Recommended and Highest volume sorts of the services list do not use it; they use the Concentrated volume rule instead.
- member since
- 2026-09-23
Recent checks
| Checked at (UTC) | Status | HTTP | Response | Endpoints |
|---|---|---|---|---|
| Online | 402 | 395ms | 6 | |
| Online | 402 | 480ms | 6 | |
| Online | 402 | 394ms | 6 | |
| Online | 402 | 301ms | 6 | |
| Online | 402 | 351ms | 6 | |
| Online | 402 | 318ms | 6 | |
| Online | 402 | 461ms | 6 | |
| Online | 402 | 297ms | 6 | |
| Online | 402 | 197ms | 6 | |
| Online | 402 | 470ms | 6 | |
| Online | 402 | 509ms | 6 | |
| Online | 402 | 327ms | 6 | |
| Online | 402 | 532ms | 6 | |
| Online | 402 | 463ms | 6 | |
| Online | 402 | 312ms | 6 | |
| Online | 402 | 334ms | 6 | |
| Online | 402 | 293ms | 6 | |
| Online | 402 | 385ms | 6 |
Changes0 in 30d
No changes recorded in the last 30 days.
Over time
- Volume 30d
- $0.00
- Uptime
- 1 of 17 completed days below 100%
More charts
09-11 to 10-10* UTC
Scores over time
09-11 to 10-10* UTC
09-11 to 10-10* UTC
09-11 to 10-10* UTC
Scores: one day per column, 09-11 to 10-10*, on the columns of Response time. Uptime held below 100% on some days in this window, including any partial day. Daily readings remain in the Uptime strip and Values. The checklist grew from 11 to 14 checks on 2026-07-28, before this window. Pillar lines use their own low and high. Exact dated readings are available in each readout and in Values.
Each series spans only the dates it has data for. Every series is also served as JSON at /api, /scores, /volume and /buyers.
Values
* today so far, partial (UTC).
The uptime summary counts completed UTC days only. The strip, readouts and table retain today's partial reading.
Daily snapshot total, no volume data in the last 30d. The visible 30d total in Traction comes from the latest assessment. These sources can differ in their window, refresh time, cent rounding and shared-address attribution.
Daily address snapshots: 2026-09-11 to 2026-10-10 UTC; * today so far, partial (UTC). Daily snapshots store cents. A recorded $0.00 with settlements cannot distinguish exact zero from volume rounded away. Lost precision is unavailable here.
Settlement volume uses the stored USD valuation of tracked payments; it is distinct from token quantities. USD-pegged assets are valued at 1 USD per token in these rollups. The measured settlement floor does not cover all payments to this service.
Assessment history last recorded at . Each UTC day uses its last recorded run; missing readings stay unmeasured. Assessment history JSON · Measurement methodology.
| Day | Volume | Buyers | Settlements | Uptime | Response | Compliance | Price percentile | Site signals |
|---|---|---|---|---|---|---|---|---|
| 2026-09-23 | no data | no data | no data | 100% | 982.35ms | 14/14 | p10 | 4/6 |
| 2026-09-24 | no data | no data | no data | 98.89% | 1348.98ms | 14/14 | p10 | 4/6 |
| 2026-09-25 | no data | no data | no data | 100% | 1122.24ms | 14/14 | p10 | 4/6 |
| 2026-09-26 | no data | no data | no data | 100% | 720.69ms | 14/14 | p10 | 4/6 |
| 2026-09-27 | no data | no data | no data | 100% | 735.78ms | 14/14 | p10 | 4/6 |
| 2026-09-28 | no data | no data | no data | 100% | 478.23ms | 14/14 | p10 | 4/6 |
| 2026-09-29 | no data | no data | no data | 100% | 370.12ms | 14/14 | p10 | 4/6 |
| 2026-09-30 | no data | no data | no data | 100% | 391.10ms | 14/14 | p10 | 4/6 |
| 2026-10-01 | no data | no data | no data | 100% | 614.14ms | 14/14 | p10 | 4/6 |
| 2026-10-02 | no data | no data | no data | 100% | 604.63ms | 14/14 | p10 | 4/6 |
| 2026-10-03 | no data | no data | no data | 100% | 486.18ms | 14/14 | p10 | 4/6 |
| 2026-10-04 | no data | no data | no data | 100% | 501.90ms | 14/14 | p10 | 4/6 |
| 2026-10-05 | no data | no data | no data | 100% | 470.01ms | 14/14 | p10 | 4/6 |
| 2026-10-06 | no data | no data | no data | 100% | 411.84ms | 14/14 | p10 | 4/6 |
| 2026-10-07 | no data | no data | no data | 100% | 468.34ms | 14/14 | p10 | 4/6 |
| 2026-10-08 | no data | no data | no data | 100% | 564.91ms | 14/14 | p10 | 4/6 |
| 2026-10-09 | no data | no data | no data | 100% | 463.66ms | 14/14 | p10 | 4/6 |
| 2026-10-10* | no data | no data | no data | 100% | 435.05ms | 14/14 | p10 | 4/6 |
Alternatives in Data
5 of 361 other ranked services in Data, ordered by the same measured score.
Own this service?
Keep this listing accurate. Ownership is proven with a domain check and every change is reviewed by hand.
Update this listingEarn the verified tier: x402list pays a real call to this endpoint and, if it delivers, the service is delivery-verified. The fee covers the cost of the probe, not the badge; there is no refund if the call does not deliver. Agent and API only, no in-browser signing. See /api.
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HTML
<a href="https://x402-list.com/services/ japan-corporate-number-api? utm_source=badge& utm_medium=referral& utm_campaign=embed"> <img src="https://x402-list.com/ badge/ japan-corporate-number-api.svg" alt="Japan Corporate-Number (法人番号) API listed on x402-list" height="28"> </a>
Markdown
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HTML, live uptime variant
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Delisting
To request delisting, email info@x402-list.com or update your listing at /services/japan-corporate-number-api/update.