Complete API Contract with Valid OpenAPI Spec
This is a ready-made prompt from the Zayenha Prompt library in Programming & Tech, written for claude-sonnet-4-7. It has a main prompt to copy into the model, built-in quality guards, and a verification prompt to run in a second window to review the answer. The full text needs the Plus plan; the description is open to all.
Design a complete REST API contract as a valid OpenAPI 3.1 spec: paths, schemas, status codes, auth, and errors, without inventing nonstandard fields or codes, with OWASP API security in mind.
Your current plan: free
Locking an API contract so frontend and backend teams work in parallel, generating client and server code from the spec, documenting a public partner API before launch.
Built-in quality guards
No fabricated status codes, headers, or fields that are nonstandard or unmentioned
OWASP API Security Top 10 applied to authorization, input, and rate limiting
OpenAPI 3.1 spec syntactically valid and tool-verifiable
Cover paths, schemas, errors, security, and versioning without truncation
Frequently asked questions
How do I use this prompt?
Copy the main prompt and paste it into claude-sonnet-4-7 or the model you use, replace what is in square brackets with your details, then run the verification prompt in a second window with the answer pasted in, and review it before relying on it.
Is this prompt free?
Its full text requires the Plus plan or higher. Free prompts you can copy at once without an account are on the ready-made Arabic prompts page.
Which model was this prompt written for?
It was written for claude-sonnet-4-7 and follows how that model works; you can run it on other models too, reviewing the result, since no single wording guarantees the best result on every model.