{"openapi":"3.1.0","info":{"title":"Nonprofit Verify","version":"1.0.0","description":"Pay-per-call US nonprofit verification for AI agents via x402 (Base mainnet).","contact":{"email":"support@example.com"}},"paths":{"/verify":{"post":{"summary":"Verify a US nonprofit by EIN","requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","required":["ein"],"properties":{"ein":{"type":"string","example":"530196605","description":"9-digit Employer Identification Number (dashes optional)."}}}}}},"responses":{"200":{"description":"Nonprofit verification result with audit receipt"},"400":{"description":"Invalid input"},"402":{"description":"Payment required (x402)"},"404":{"description":"No organization found for this EIN"}}}}}}