Forest Web – OpenAPI Payload Validator

x402

Forest Web – OpenAPI Payload Validator is a paid API for AI agents from http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-10).

Validates a single JSON request or response payload against the documented JSON schema for a specific OpenAPI or Swagger operation path and method.

Price / call$0.002

Seller volume →—

Success—

StatusUnknown

How this service works

Machine-readable contract for active Forest paid capabilities. Unsigned paid calls return HTTP 402 with a PAYMENT-REQUIRED x402 challenge.

Output

A validation result indicating whether the supplied JSON payload conforms to the JSON schema extracted from the specified OpenAPI/Swagger operation. Includes any validation errors, mismatched fields, missing required properties, or type violations found in the payload relative to the documented schema.

Example use cases

Pre-flight request body check

“Before I send this JSON to the API, can you validate it as a POST request body against the OpenAPI spec at https://petstore3.swagger.io/api/v3/openapi.json for the /pet path and tell me if there are any schema errors?”

Response conformance audit

“I got a 200 response from the GET /orders/{id} endpoint — here's the JSON payload. Can you check it against the swagger spec at https://myapi.example.com/swagger.json to see if the response actually matches what the spec documents?”

CI schema regression check

“As part of our build pipeline, validate this JSON as the PATCH /accounts/{id} request body against the spec at https://internal.example.com/openapi.yaml and flag any fields that violate the documented schema.”

Technical details

Endpoint

POSThttps://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/openapi/payload-validate?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need deterministic, schema-level validation of a single JSON payload against a specific OpenAPI or Swagger operation without actually invoking the described API. It is ideal for pre-flight checks before sending requests, CI/CD regression tests, response conformance audits, and agent pipelines that need to verify payload structure before trusting or forwarding data. Prefer this over general JSON Schema validators when you want automatic schema extraction from a live OpenAPI spec URL rather than supplying a schema manually.

Side effects

Spec URL is not publicly accessible or returns non-200 — fetch fails
Spec is not valid OpenAPI or Swagger format — parsing error returned
Path or method combination not found in the spec — operation not found error
Status code not documented for the given operation — scope resolution fails
Payload contains deeply nested or recursive references that exceed bounded resolution — truncated validation
Invalid JSON payload supplied — parse error before validation begins

Input

Schema · Request body

Field	Type	Description
url	string	Public HTTP(S) URL to inspect, resolve, or compare.
part	—	Public part value used to scope this lookup.
path	string	Repository file path whose public metadata should be checked.
method	string	HTTP method for the bounded public probe.
status	string	Public status value used to scope this lookup.
payload	—	Public payload value used to scope this lookup.

Output

Schema · Response

{
  "type": "json",
  "example": {
    "ok": true,
    "data": {
      "url": "example",
      "found": false,
      "scope": "documented_schema_validation_only_no_api_execution",
      "valid": false,
      "version": "example",
      "requested": {
        "part": "request",
        "path": "example",
        "method": "GET",
        "status": "example"
      },
      "truncated": false,
      "violations": [],
      "parse_valid": false,
      "content_type": "example",
      "schema_scope": "forest_bounded_json_schema_subset_v1",
      "schema_state": "validated",
      "matched_status": "example",
      "schema_present": false,
      "operation_count": 0,
      "violation_count": 0,
      "unsupported_keywords": []
    },
    "meta": {
      "cache": "miss",
      "provider": "openapi-parser",
      "checked_at": "2026-01-01T00:00:00.000Z",
      "duration_ms": 0
    },
    "version": "1",
    "capability": "openapi.payload-validate"
  }
}

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