Write API docs developers love

Create a free Postman account and build a Collection that mirrors your API routes. Add example request bodies and expected responses for each endpoint. Use Postman's Export feature to generate an OpenAPI 3.0 spec file you will reuse in the next tools.

Host your OpenAPI spec file on a public URL (a GitHub Gist or your server works fine). Point Swagger UI at that URL using the SwaggerUIBundle initializer. Embed it in a /docs route of your app so developers can explore and test endpoints without leaving the browser.

Sign up for ReadMe and create a new project. Import your OpenAPI spec to auto-populate the API reference section. Add authentication guides and quickstart tutorials in the Guides section, then share the project URL with your API consumers.