mirrored listing x402 eip155:8453

Entity and counterparty verification by identifier or name

Entity and counterparty verification by identifier or name. Resolves US healthcare providers (CMS NPI), legal entities (GLEIF LEI), US banks (FDIC), SEC filers (EDGAR CIK or ticker), and US tax exempt orgs (IRS EIN). Returns legal name, status, jurisdiction, identifiers, and a provenance URL to the official source. For KYC, KYB, due diligence, and onboarding agent workflows.

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Claim this listing
50000 (raw units)
price
7
calls / 30d
1
unique payers
2026-08-26
updated

Provider

api.osf-master-server.com · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x72f62dE8b70d6CFa8Cc2dF6f21F243f289F3396c",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "50000",
    "maxTimeoutSeconds": 300
  }
]

Output schema

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "pathParams": {
          "query": ":query"
        },
        "queryParams": {
          "format": "json"
        },
        "type": "http"
      },
      "output": {
        "example": {
          "audit_receipt": {
            "lookup_id": "uuid",
            "result_sha256": "..."
          },
          "compliance_note": "A registry match is an identity SIGNAL, not a full due-diligence determination. Confirm against the linked official source and follow your institution's onboarding/KYB process before acting.",
          "coverage_note": "Resolved against US CMS NPI (healthcare providers), GLEIF LEI (global legal entities), FDIC (US insured banks), SEC EDGAR (US filers), and the IRS EO BMF (US tax exempt organizations) only. This is not a complete global registry of all businesses or individuals; absence here does not mean an entity does not exist.",
          "match_count": 1,
          "matches": [
            {
              "entity_type": "legal_entity",
              "identifier": "254900C6J3WN4F1AU607",
              "identifier_type": "LEI",
              "jurisdiction": "US-DE",
              "match_basis": "identifier",
              "name": "Defiance KSM TipRanks Analyst ETF",
              "provenance_url": "https://search.gleif.org/#/record/254900C6J3WN4F1AU607",
              "registry": "GLEIF"
            }
          ],
          "query": "254900C6J3WN4F1AU607",
          "result": "FOUND",
          "service": "OSF Identity - Entity Lookup"
        },
        "type": "json"
      }
    },
    "routeTemplate": "/x402/identity/entity/:query",
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "pathParams": {
              "type": "object"
            },
            "queryParams": {
              "properties": {
                "format": {
                  "description": "Response format (json).",
                  "type": "string"
                }
              },
              "required": [
                "format"
              ],
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "properties": {
                "audit_receipt": {
                  "type": "object"
                },
                "compliance_note": {
                  "type": "string"
                },
                "coverage_note": {
                  "type": "string"
                },
                "match_count": {
                  "type": "integer"
                },
                "matches": {
                  "type": "array"
                },
                "query": {
                  "type": "string"
                },
                "result": {
                  "description": "FOUND, NOT_FOUND, LOOKUP_UNAVAILABLE, or INVALID_INPUT",
                  "type": "string"
                },
                "service": {
                  "type": "string"
                }
              },
              "required": [
                "service",
                "query",
                "result",
                "match_count",
                "matches",
                "compliance_note",
                "audit_receipt"
              ],
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

Use it

curl

curl "https://api.osf-master-server.com/x402/identity/entity/:query"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://api.osf-master-server.com/x402/identity/entity/:query");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://api.osf-master-server.com/x402/identity/entity/:query")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Machine-readable

Everything on this page is also available as clean JSON at /resources/5067.json, and this resource appears in /discovery/resources and /discovery/search.