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PennyRail OpenAPI Mock Response Schema Validator
x402
PennyRail OpenAPI Mock Response Schema Validator is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.001/call, status down (last checked 2026-10-31).
Validates a JSON request or response payload against an OpenAPI 3.x or Swagger 2.x operation schema, returning a machine-readable settlement result
Price / call$0.001
Success—
StatusDown
How this service works
Machine-readable settlement service
Output
Returns a machine-readable object indicating whether the submitted JSON payload is valid against the provided OpenAPI/Swagger schema, including any validation errors, field violations, or conformance details.
Example use cases
CI pipeline schema conformance check
“Before we ship this release, validate that our API's response JSON matches the OpenAPI 3.x operation schema in our spec — flag any fields that are missing or have the wrong type.”
Mock response verification for API design
“I wrote a mock response for our new endpoint — can you run it through the OpenAPI schema validator and confirm it fully conforms to the Swagger 2.x operation definition?”
Third-party API integration debugging
“We're getting weird errors from a vendor API — can you validate the request payload we're sending against their published OpenAPI 3.x schema and tell me what's wrong with it?”
Technical details
Endpoint
POSThttps://pennyrail.vercel.app/api/p/nano/openapi.mock-response--schema-mock?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, pay-per-call OpenAPI/Swagger schema validation without standing up your own validator infrastructure. Particularly useful in agent pipelines that need to verify API payloads on-the-fly against operation schemas as part of automated integration testing or CI workflows.
Side effects
- Malformed or missing input object returns a generic error
- Schema not recognized or unsupported OpenAPI version may return validation failure
- Overly permissive response schema (additionalProperties: true) means success responses vary widely
- Network or deployment errors on Vercel may cause 5xx responses
- Ambiguous or incomplete OpenAPI operation definitions may yield false positives
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
Schema · Response
{
"type": "object",
"additionalProperties": true
}Tags
x402
Reviews
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