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.
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 headerMachine-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.