{"uid":"cap_oNvtYwOw3erl10RzT0FYi","slug":"pennyrail-openapi-payload-validator-2157fdf1","name":"PennyRail OpenAPI Payload Validator","description":"Validate a JSON request or response payload against one OpenAPI 3.x / Swagger 2.x operation schema. Supports deterministic JSON-Schema validation rules without external calls. Exact-match PennyRail gap-arbitrage route.","url":"https://pennyrail.vercel.app/api/bazaar/openapi-validate","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"type":"object","description":"Input for OpenAPI payload validator.","additionalProperties":true},"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"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_JxPA_T7QdsNej9ds1fDb9","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates a JSON request or response body against an OpenAPI 3.x/Swagger 2.x operation schema using deterministic JSON-Schema rules, with no external calls.","exampleAgentPrompt":"Can you validate this JSON body against my OpenAPI 3.x operation schema? It's a POST request with a JSON body type — I need to know if it passes all the schema constraints deterministically without hitting any external services.","exampleUseCases":[{"title":"CI pipeline API contract check","prompt":"Before we deploy, can you validate this JSON request payload against our OpenAPI 3.1 operation schema to make sure it conforms — it's a POST with a JSON body and I need a deterministic pass or fail?"},{"title":"Debugging malformed API response","prompt":"I'm getting unexpected errors — can you check whether this JSON response body actually matches our Swagger 2.x schema for this POST endpoint and tell me exactly which fields are invalid?"},{"title":"Agent self-validating outbound calls","prompt":"Before I send this API call, validate my JSON request body against the OpenAPI 3.x spec I have — it's a POST with a JSON body type and I want to catch any schema violations before they hit the server."}],"resultDescription":"Returns a structured validation result indicating whether the submitted JSON body passes or fails against the specified OpenAPI/Swagger schema, including details of any schema violations or constraint mismatches found during deterministic JSON-Schema evaluation.","failureModes":["Invalid or malformed OpenAPI schema provided — returns schema parse error","Body type mismatch (e.g. sending binary as JSON) — returns type error","Missing required fields in the input object — returns 400 bad request","Unsupported OpenAPI version — returns unsupported version error","Malformed JSON body that cannot be parsed — returns parse failure"],"whenToPreferThis":"Choose this endpoint when you need fast, deterministic, self-contained JSON-Schema validation against an OpenAPI 3.x or Swagger 2.x spec without any external HTTP calls or network dependencies. Ideal for CI pipelines, agent pre-flight checks before issuing API calls, or any scenario requiring offline, reproducible schema conformance testing at very low cost ($0.001 per call).","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:41:31.158Z","isFirstParty":false}