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agent402.tools OpenAPI-to-cURL Command Builder
x402
agent402.tools OpenAPI-to-cURL Command Builder is a paid API for AI agents from agent402.tools, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Generates a runnable curl command for a specified operation in an OpenAPI 3.x or Swagger 2.x spec, resolving path parameters, required query params, and headers using example values from the spec.
Price / call$0.002
Success—
StatusUnknown
How this service works
Build a runnable curl command for one operation in an OpenAPI 3.x or Swagger 2.x spec. Locate the operation by operationId (preferred) or by method + path, substitute path parameters using the spec's example values, include required query and header parameters with their example values, and attach a JSON body when the operation defines one. Returns the structured request (method, url, headers, body) alongside the assembled curl string with POSIX single-quote escaping.
Output
A complete, runnable curl command string with path parameters substituted, required query parameters and headers included, based on example values found in the provided OpenAPI or Swagger spec.
Example use cases
Example prompt
“Take this OpenAPI spec and build me a runnable curl command for the 'createUser' operation — use the example values from the spec to fill in path params and required headers.”
Technical details
Endpoint
POSThttps://agent402.tools/api/openapi-to-curlWhen to prefer
Use this endpoint when you have an OpenAPI 3.x or Swagger 2.x spec and need a ready-to-run curl command for a specific operation, especially when you want parameters auto-filled from spec examples rather than writing the curl command manually.
Side effects
- operationId not found in spec — returns error indicating missing or mismatched operationId
- spec is invalid or unparseable JSON/YAML — returns parse error
- method + path combo does not match any operation — returns not found error
- required path parameter has no example value in spec — may return incomplete or placeholder curl command
- malformed input schema — returns validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| path | — | Path template (use with `method` if no operationId) |
| spec | — | OpenAPI/Swagger document (object or JSON string) |
| method | — | HTTP method (use with `path` if no operationId) |
| operationId | — | operationId of the operation to render (preferred) |
Output
Schema · Response
{
"type": "json",
"example": {
"url": "https://api.example.com/users/u_42?fields=name%2Cemail",
"body": null,
"curl": "curl -X GET 'https://api.example.com/users/u_42?fields=name%2Cemail'",
"method": "GET",
"headers": {}
}
}Tags
x402
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