{"uid":"cap_4Th7xF5CjuFOxGygEo2_I","slug":"pennyrail-openapi-mock-response-validator-c3317229","name":"PennyRail OpenAPI Mock Response Validator","description":"Machine-readable settlement service","url":"https://pennyrail.vercel.app/api/p/nano/openapi.mock-response--openapi-mock-response","method":"POST","headers":{},"bodySchema":{"type":"object","required":["input"],"properties":{"input":{"type":"object"}}},"responseSchema":{"type":"object","additionalProperties":true},"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_aQ0kQ7nSjCvdZQaTh6Ntb","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 payload against an OpenAPI 3.x or Swagger 2.x operation schema, returning a mock or validated response","exampleAgentPrompt":"Can you validate this JSON payload against my OpenAPI 3.x operation schema and tell me if it conforms, and give me a mock response if it does?","exampleUseCases":[{"title":"Pre-flight API request validation","prompt":"Before I send this order payload to the payments API, can you check it against the OpenAPI spec to make sure it's valid JSON and conforms to the schema?"},{"title":"Mock response for frontend development","prompt":"I'm building the frontend and the backend isn't ready yet — can you generate a mock OpenAPI response for the GET /users/{id} operation based on this Swagger 2.x schema?"},{"title":"CI pipeline schema conformance check","prompt":"I want to verify that the response my staging API returned for POST /invoices actually matches what the OpenAPI 3.x spec says the response should look like — can you check it?"}],"resultDescription":"Returns a validation result indicating whether the input JSON payload conforms to the specified OpenAPI 3.x or Swagger 2.x operation schema, along with any validation errors and a mock response object where applicable.","failureModes":["Malformed or missing input JSON payload returns a schema validation error","Unsupported OpenAPI or Swagger version yields an unrecognized schema error","Payload that does not conform to the operation schema returns a list of constraint violations","Empty or null input object may return a required field error","Network or cold-start latency on Vercel may occasionally cause timeout"],"whenToPreferThis":"Choose this endpoint when you need a lightweight, pay-per-call OpenAPI/Swagger schema validation and mock-response service without standing up your own validation infrastructure. Particularly useful in CI/CD pipelines, agent workflows that build or test APIs dynamically, or frontend development where a backend isn't yet available.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T07:18:24.446Z","isFirstParty":false}