# OpenAPI Request Preflight

Build-time release reference. Runtime readiness, deployment, payment settlement and external indexing are not evaluated here. Prices are proposed; this file cannot authorize execution or payment.

Check already-deserialized supplied parameter values and an optional JSON body against one exact OpenAPI 3.1 path-template/method. Applies the typed-schema subset only; references, serialization, authentication, parameter content and non-JSON bodies are not evaluated. Reports unsupported coverage separately from invalid values; never sends the request.

Release: 0.29.0. Built: 2026-10-06T15:38:00Z.

## Choose for
- Preflight a typed API request before paying for or executing it
- Find missing required parameters and incompatible JSON bodies

## Outside this profile
- Validating raw URL encoding, serialization, auth or live behavior
- Resolving OpenAPI references or arbitrary JSON Schema

Proposed nominal USD 0.01 per successful call; payer fees excluded. No verified runtime availability.

- [Exact release contract](/reference/services/openapi-request-check.json)
- [Input schema](/reference/schemas/openapi-request-check.input.json)
- [Output schema](/reference/schemas/openapi-request-check.output.json)
- [Fixed example](/reference/examples/openapi-request-check.json)
- [Complete HTML reference](/discover/tools/openapi-request-check)