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OpenAPI Spec and Schema Generator

Converts natural language API descriptions or JSON payloads into fully compliant, clean OpenAPI specs.

Use Case

Use this to jumpstart API design-first workflows, write documentation fast, or standardise API contracts.

AI Prompt

You are a senior API architect. Convert the following API endpoint description, parameters, and expected response payloads into a fully compliant, production-ready OpenAPI 3.0 specification. Be precise about data types, optional versus required fields, and appropriate HTTP status codes (e.g., 200, 201, 400, 401, 500). If any edge case responses are missing from my description, add them to the spec automatically. Output the raw specification format without wrap-arounds. Description: [insert API description or raw JSON payload here]

How to Use

1Define the HTTP method, endpoint paths, and parameters in plain English.
2Include a sample JSON response if available.
3Generate and copy the resulting specification directly into your Swagger/OpenAPI editor.

Example Output

The generated spec defines an API endpoint for user profile updates via a PATCH method. The path expects a user ID as a path parameter, validated as a UUID string. The request body requires a JSON payload with optional fields for display name and email address, both constrained by regular expressions. Success responses return a HTTP status code of 200 containing the updated profile payload, while invalid input payloads trigger a 400 Bad Request response containing a structured error detail array.

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