{"slug":"agent402-tools-api-openapi-validate-payload-115828","title":"Validate a JSON payload against the request or response schema for one operation","host":"agent402.tools","method":"POST","resource":"https://agent402.tools/api/openapi-validate-payload","category":"code","description":"Validate a JSON payload against the request or response schema for one operation in an OpenAPI 3.x or Swagger 2.x spec. Locate the operation by operationId or method+path; choose `part: \"request\"` or `part: \"response\"` (status defaults to the first 2xx). Deterministic subset of JSON Schema: type, re","price_listed":0.001,"price_asked":0.001,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":938,"reported_calls_30d":5,"reported_payers_30d":1,"networks":["algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=","eip155:10","eip155:1329","eip155:137","eip155:143","eip155:42161","eip155:42220","eip155:43114","eip155:4663","eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","stellar:pubnet"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"operationId":"createUser","part":"request","payload":{"age":"thirty","extra":"noise","name":"Alice"},"spec":{"openapi":"3.0.0","paths":{"/users":{"post":{"operationId":"createUser","requestBody":{"content":{"application/json":{"schema":{"additionalProperties":false,"properties":{"age":{"type":"integer"},"email":{"type":"string"},"name":{"type":"string"},"role":{"enum":["admin","user"],"type":"string"}},"required":["name","email"],"type":"object"}}}},"responses":{"201":{"description":"ok"}}}}}}},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"properties":{"method":{"description":"HTTP method (use with `path` if no operationId)"},"operationId":{"description":"operationId to validate against (preferred)"},"part":{"description":"Schema to validate against: \"request\" or \"response\""},"path":{"description":"Path template (use with `method` if no operationId)"},"payload":{"description":"JSON value to validate"},"spec":{"description":"OpenAPI/Swagger document (object or JSON string)"},"status":{"description":"Response status when part=\"response\" (defaults to first 2xx)"}},"required":["spec","part","payload"]},"bodyType":{"enum":["json","form-data","text"],"type":"string"},"method":{"enum":["POST"],"type":"string"},"type":{"const":"http","type":"string"}},"required":["type","method","bodyType","body"],"type":"object"},"output":{"properties":{"example":{"properties":{"errors":{"items":{"properties":{"message":{"type":"string"},"path":{"type":"string"},"rule":{"type":"string"}},"type":"object"},"type":"array"},"schemaPresent":{"type":"boolean"},"valid":{"type":"boolean"}},"required":["valid","schemaPresent","errors"],"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-09-24","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.001,"price_match":true,"latency_ms":938,"error":null}],"description_full":"Validate a JSON payload against the request or response schema for one operation in an OpenAPI 3.x or Swagger 2.x spec. Locate the operation by operationId or method+path; choose `part: \"request\"` or `part: \"response\"` (status defaults to the first 2xx). Deterministic subset of JSON Schema: type, required, enum, properties, items, additionalProperties:false, oneOf/anyOf/allOf, $ref-detection (not dereferenced).","last_updated":"2026-09-21T11:08:58.152Z","schemes":["exact","upto"]}