●

Japan Corporate-Number (法人番号) API

Data PAYMENT-READY

payment-ready until 2026-09-30

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

Pay from $0.001 to $0.25 per request in USDC on Base / Polygon / Solana, settled onchain via the x402 protocol, no signup, no API key needed.

measured since 2026-05-18 (start of our harvest window) · $0 all-time · last settled 2026-09-22

BASE URL https://houjin.agentic-jp.com │ WEBSITE https://houjin.agentic-jp.com │ ENDPOINTS 6 │ NETWORK Base / Polygon / Solana │ ASSET USDC │ MEMBER SINCE 2026-09-23 │ MONITORED SINCE 2026-09-23

VERDICT

ranking generation 3

solid 89/100 #18 of 321 in Data by measured score

What the score read on this service: status online, 100% uptime 24h (no 30d window yet), 223ms 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.

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 321 listings, this one among them. That set is wider than the 321 the position above is counted against, 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.

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.

ALTERNATIVES IN DATA

Other Data services in this directory, ordered by the same measured score. The figures are ours: 30-day uptime from our own probes, 30-day settlement volume read on-chain (a conservative undercount, and null where we cannot measure it, never a zero).

Ranked alternative x402 services in the same category, with band, measured score, 30-day uptime and 30-day on-chain settlement volume
SERVICE	BAND	SCORE	UPTIME 30D	VOL 30D
StableEnrich	strong	95	100%	$2.0k
glim.sh	strong	95	100%	$47.00
SniperX•x402	strong	95	100%	$315.07
cn402	strong	94	100%	$35.79
API Acre	solid	92	99.5%	$31.95

5 of 320 other ranked services in Data · see the whole category

ASSESSMENT

updated 2h ago

The parts the verdict above is computed from, each with its proof. Click any chip. Measured values stay read-only; unknown is honest, and an unknown is never counted as a zero.

reliability 100%

uptime 24h: -
uptime 7d: -
uptime 30d: -
uptime 90d: -
response p95: 223ms
avg response: 223ms
total checks: 1

Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.

compliance A (14/14)

14 of 14 x402 conformance checks pass. Full checklist below.

jump to compliance checklist

price $0.001 to $0.25 (p10 in Data)

price (min): $0.001
price (max): $0.25
category percentile (min): p10 in Data
category percentile (max): p84 in Data
endpoints / prices: 6 / 5
model: tiered
stability: 100%

risk clean

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.

traction $0.00 30d · 0 buyers

volume 30d: $0.00
buyers 30d: 0
settlements 30d: 0
measured since: 2026-05-18 (start of our harvest window)
last settlement: 2026-09-22
top buyer share: -
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: -
settled via: -

Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.

Top buyer share is a concentration signal, not part of the ranking score.

WHAT IT DOES

ai-derived

No AI synthesis has been produced for this service yet.

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
METHOD	PATH	PRICE	NETWORK	ASSET	402 CHANNEL
POST	/batch	$0.0032	Base/Polygon/Solana	USDC	header
GET	/corporation/7010401052137	$0.005	Base/Polygon/Solana	USDC	header
POST	/report	$0.25	Base/Polygon/Solana	USDC	header
POST	/search	$0.015	Base/Polygon/Solana	USDC	header
GET	/stats	$0.001	Base/Polygon/Solana	USDC	header
POST	/verify	$0.005	Base/Polygon/Solana	USDC	header

6 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to GET /corporation/7010401052137 returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request

curl -i 'https://houjin.agentic-jp.com/corporation/7010401052137'

// 402 response (captured by monitor) · 6 payloads · click to expand

[
  {
    "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
  },
  {
    "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
  },
  {
    "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
  },
  {
    "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
  },
  {
    "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
  },
  {
    "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
  }
]

OVER TIME

All charts use the 7d selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/japan-corporate-number-api/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted). The on-chain series roll up hourly, so the latest day can be up to about an hour behind; distinct buyers are counted per payout address, so a service that settles to more than one address is an upper bound.

UPTIME

7d UPTIME 100%

RESPONSE TIME

AVG RESP 579ms

PRICE (captured 402, USD)

Median across 6 endpoints. Use the selector to isolate one.

SUB-SCORES (uptime + x402 compliance)

checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression

VOLUME (on-chain settlement, USD)

DISTINCT BUYERS

COMPLIANCE

14/14 checks pass · grade A

last 402 captured 2026-09-23 · last up 2026-09-23

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

SITE PILLARS

homepage reachable
openapi doc
pricing page
llms.txt
robots.txt
terms page

recent checks (9) live · click to expand

TIME STATUS RESP CAUSE

11:49:02 UTC ● OK 478ms

11:33:12 UTC ● SLOW 2109ms

11:17:02 UTC ● OK 453ms

11:01:03 UTC ● OK 497ms

10:45:01 UTC ● OK 274ms

10:29:02 UTC ● OK 351ms

10:13:02 UTC ● OK 402ms

09:57:02 UTC ● OK 425ms

09:41:01 UTC ● OK 223ms

EMBED THIS BADGE

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status

Japan Corporate-Number (法人番号) API uptime on x402-list — live uptime

// 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

[![Japan Corporate-Number (法人番号) API on x402-list](https://x402-list.com/badge/japan-corporate-number-api.svg)](https://x402-list.com/services/japan-corporate-number-api?utm_source=badge&utm_medium=referral&utm_campaign=embed)

// HTML · live uptime variant

<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?data=uptime" alt="Japan Corporate-Number (法人番号) API uptime on x402-list" height="28">
</a>

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