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Design a REST API for My Feature
This prompt produces a complete, production-ready REST API design including endpoint definitions, request/response schemas, error handling, and authentication strategy. It follows REST conventions and accounts for your scale requirements. Use the output as your technical spec before writing a single line of code.
The Prompt0 of 6 slots filled. Copy as-is or fill more.
Please design a RESTful API for the following feature. Act as a senior backend engineer with expertise in API design best practices.
Project context:
- What the product does:
- Feature to design:
- Tech stack (optional):
- Authentication method:
- Expected scale:
Requirements:
Please design:
1. **Endpoint list** - HTTP method, URL path, and purpose for each endpoint
2. **Request/response schemas** - JSON body structure with field names and types
3. **Authentication and authorization** - which endpoints require auth, any role-based access
4. **HTTP status codes** - what to return for success, validation errors, not found, unauthorized
5. **Error response format** - a consistent error object structure
6. **Pagination** - approach for list endpoints (cursor-based or offset)
7. **Versioning strategy** - how to handle future breaking changes
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How to use this prompt
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Fill the slots
Edit the highlighted fields above. Same-named slots stay synced.
2
Copy filled
The copy button writes the version with your inputs already filled in.
3
Paste & send
Use it in ChatGPT, Claude, Gemini, or Copilotly.
4
Ask follow-ups
Drill into specific points: "Expand on #3" or "What about X?"
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Pro tips for better results
โDescribe your product and feature in detail - the more context you give, the more domain-appropriate the endpoint names and data models will be
โSpecify your authentication method upfront since it affects every endpoint's design
โAsk for an OpenAPI/Swagger YAML spec as a follow-up to generate documentation and client code automatically
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Why this prompt works
Most people write one-line prompts and get generic, surface-level AI responses. This prompt is engineered to produce expert-level output because it bakes in three principles that meaningfully shift response quality:
Role assignment
It tells the AI to act as a specific professional (a engineering & code expert), activating more relevant knowledge and shifting away from generic advice.
Structured output
It specifies the exact response format - numbered steps, comparisons, risk ratings - so you get organized, actionable answers instead of a wall of prose.
Context anchoring
The slots you just filled force the AI to ground every recommendation in your specific situation instead of defaulting to textbook advice.
For sharper output, use this prompt with Engineering Copilot - it already has engineering & code expertise built in and ships output in the format you expect.
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Works with every AI platform
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ChatGPT
Compatible
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Claude
Compatible
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Gemini
Compatible
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Copilotly
Best results
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Frequently asked questions
What does the "Design a REST API for My Feature" prompt do?
This prompt produces a complete, production-ready REST API design including endpoint definitions, request/response schemas, error handling, and authentication strategy. It follows REST conventions and accounts for your scale requirements. Use the output as your technical spec before writing a single line of code.
Can I use this prompt with ChatGPT?
Yes. This prompt works with ChatGPT, Claude, Gemini, and any other AI platform. For the best engineering & code results, use it with Copilotly's Engineering Copilot copilot, which has built-in domain expertise.
Is this prompt free?
Completely free. Fill the slots above, copy the result, and use it with any AI tool. No account required to read, fill, or copy prompts.
How do I customize this prompt?
Replace the highlighted placeholders inline above with your specific details. The more context you provide, the better the AI response. Switch to "Raw" mode in the top-bar to see the unfilled template.
What AI copilot is best for engineering & code prompts?
Copilotly's Engineering Copilot is purpose-built for engineering & code tasks. Unlike generic AI chatbots that hedge or refuse professional advice, Copilotly's copilots use domain-specific frameworks, terminology, and output formats.
The real valueA prompt is a starting line.
A prompt is a starting line.
A copilot runs the race.
Engineering Copilot already knows the right questions to ask, the right format to return, and the follow-ups to drive. Free to start, no card needed.
Open Engineering CopilotAI API design promptREST API design AIChatGPT API designAI design REST endpointsAPI schema generator AI
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