How do I generate code samples for API docs?

A good way to generate code samples for API docs is to make them derived from the API definition, not hand-written in isolation. That keeps samples accurate as the API changes.

Common approaches

1) Generate from an OpenAPI spec

If your API has an OpenAPI/Swagger definition, you can generate request examples and client snippets from it.

Typical tools:

• OpenAPI Generator
• Swagger Codegen
• Stoplight
• Redocly
• Postman (for collections/examples)

Example:

• Define endpoints, parameters, request bodies, and response schemas in OpenAPI.
• Use a docs tool to render:
  • curl
  • JavaScript / TypeScript
  • Python
  • Java / C#
  • etc.

2) Use language-specific snippet templates

If you don’t have OpenAPI, you can still create reusable templates:

• Store sample requests in a structured format
• Fill placeholders from endpoint metadata
• Render different languages from the same source

This is common in docs sites built with:

• Docusaurus
• MkDocs
• Sphinx
• ReadMe
• Mintlify

3) Generate from real API examples

If you have example requests/responses in tests or Postman collections:

• Export those examples
• Convert them into docs snippets
• Keep them synchronized with automated checks

This is useful if your API is already tested and documented through examples.

Best practices

Keep samples synchronized

Automate generation so examples update when:

• endpoints change
• auth changes
• request/response schemas change

Include complete, runnable samples

Each sample should show:

• base URL
• auth headers
• required parameters
• request body
• expected response

Provide multiple formats

Usually the most useful docs include:

• curl
• JavaScript/TypeScript
• Python
• one or two popular SDK languages

Make examples realistic

Use realistic placeholder values:

• user_123
• sk_live_...
• cus_abc123

Avoid vague placeholders like string or value unless the docs clearly explain them.

Simple workflow

1. Define your API in OpenAPI.
2. Add example request/response bodies.
3. Use a docs generator to render examples.
4. Add CI checks to ensure examples still compile or validate.
5. Regenerate docs automatically on API changes.

Example

For an endpoint like:

• POST /v1/users

You might generate:

curl -X POST https://api.example.com/v1/users \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"name":"Ada Lovelace","email":"ada@example.com"}'

And equivalent snippets in Python, JavaScript, etc.

If you want the easiest route

• Have OpenAPI? Use Redocly / Swagger UI / OpenAPI Generator
• Need polished docs site? Use Mintlify / ReadMe / Stoplight
• Need custom docs? Generate snippets from your OpenAPI spec with your own script

If you want, I can show you:

1. a Python script to generate samples from OpenAPI, or
2. a full workflow for generating curl, JS, and Python snippets automatically.