How do I publish API documentation for external developers?

To publish API documentation for external developers, aim for clear, accessible, versioned, and interactive docs that cover both “how to use it” and “what to expect.”

1) Put your docs where developers can find them

Common options:

• Dedicated docs site: e.g. docs.yourcompany.com
• Developer portal: includes docs, API keys, changelogs, status page, support
• Public repository: if your API is open source or you want community contributions

2) Include the essentials

External developers usually need:

• API overview: what the API does, who it’s for
• Authentication: API keys, OAuth, JWT, etc.
• Base URLs: sandbox vs production
• Quick start: first successful request in 5 minutes
• Endpoints: method, path, parameters, request/response examples
• Error codes: what they mean and how to handle them
• Rate limits: limits and retry guidance
• Pagination/filtering/sorting: if applicable
• Webhooks/events: setup, signature verification, retries
• SDKs and sample code: if you provide them
• Changelog/versioning: breaking changes and deprecation policy
• Support/contact: how to get help

3) Use a standard format

Good documentation is easier to maintain when your API definition drives it.

Popular approaches:

• OpenAPI/Swagger for REST APIs
• AsyncAPI for event-driven APIs
• GraphQL schema docs for GraphQL APIs

These can auto-generate:

• Reference docs
• Interactive “try it” consoles
• Client SDKs

4) Make it interactive

External developers benefit from:

• Try-it-out requests
• Example responses
• Copyable curl / JS / Python snippets
• Sandbox environment
• Postman collections

5) Organize for developer tasks, not your internal architecture

A good structure is:

1. Getting started
2. Authentication
3. Core concepts
4. Common workflows
5. Endpoint reference
6. Webhooks
7. Errors and troubleshooting
8. Changelog

6) Document versioning and deprecations clearly

To avoid breaking integrations:

• Publish semantic versions or explicit API versions in the URL/header
• Maintain separate docs for each active version
• Announce deprecations with timelines and migration guides

7) Keep docs synchronized with the API

Best practices:

• Generate reference docs from your API spec
• Add docs review to your release process
• Test examples periodically
• Keep a changelog and release notes

8) Secure what should be public

Make sure external docs do not expose:

• Secrets or private endpoints
• Internal-only IPs/services
• Production credentials
• Sensitive sample data

9) Improve discoverability and trust

Helpful additions:

• Search
• Status page
• FAQ
• Known issues
• Code samples
• Latency/uptime info
• Compliance/security docs if relevant

10) Recommended tooling

Depending on your stack:

• OpenAPI + Swagger UI / Redoc
• Stoplight
• ReadMe
• Docusaurus / MkDocs for written guides
• Postman
• GitHub Pages / Netlify / Vercel for hosting

Simple example structure

Developer Portal
├── Getting Started
├── Authentication
├── API Reference
│   ├── Users
│   ├── Orders
│   └── Webhooks
├── SDKs
├── Changelog
├── Status
└── Support

If you want, I can also help you with:

• a template for an API docs site
• an OpenAPI-based publishing workflow
• a checklist for external developer documentation