An API docs project usually starts with a reference generator or an empty navigation tree. I built this API documentation page outline to start somewhere more useful: a developer should be able to choose a safe request, recognize its result, inspect exact behavior, and recover when the request fails.
The template has seven page jobs, not seven arbitrary menu labels. It keeps a quickstart from trying to become a field catalog, and it keeps a reference page from pretending it selected the right first request.
Download the API documentation template
Download the API documentation page outline
The file is Markdown, so you can put it beside an OpenAPI description, a documentation repository, or a content brief. Replace the bracketed instructions with product facts, then remove any page whose reader decision does not exist in your API.
API documentation template: assign each page a reader job
| Reader moment | Page that owns it | Completion state |
|---|---|---|
| I need to know where to begin | Documentation homepage | The reader can identify a first task and its starting route. |
| I have test access and need proof it works | Quickstart | A safe request returns a recognizable result. |
| I need to create or send a credential | Authentication guide | The credential format, scope, and predictable failure path are explicit. |
| I need the exact contract | API reference | The operation, parameters, schemas, responses, and relevant limits are inspectable. |
| My request failed | Error and troubleshooting guide | The status, likely cause, diagnostic detail, and recovery action are local. |
| My system receives an event | Webhooks or event guide | Verification, payload behavior, duplicates, and failed delivery are documented. |
| The API changed | Version and change guide | Affected versions, required action, compatibility boundary, and destination are named. |
The OpenAPI Specification provides a strong structure for paths, operations, parameters, request bodies, responses, and security. It does not decide which operation is safe for a new developer to run or what recovery step follows a product-specific failure, so the template gives those tasks dedicated homes.
Start the API docs project with a homepage and quickstart
The homepage is a router, not a welcome message. It should name the reader's first task and make authentication, the quickstart, reference, and support state reachable before the reader has to understand your object model.
The quickstart owns first success. Give it a safe credential boundary, one complete request, and one result the reader can recognize, then link the exact operation instead of repeating every field in the guide.
GitHub keeps a versioned REST reference and quickstart within the same documentation system, and Notion's API quickstart starts from a development credential before it moves into its API surface. Those routes work because a reader can make an early choice without treating a reference index as an onboarding plan.
Keep authentication and API reference exact
Authentication deserves a guide because obtaining a credential is often a separate task from sending it. The guide can explain the test-safe process and the first failure state, while the reference records the scheme, scope behavior, header format, and endpoint-specific security requirements.
Reference owns details that need stable names: method, path, parameter type, required state, default, constraint, body schema, response schema, and limits. Stripe's API reference organizes objects and endpoints for that exact inspection job, which is different from choosing the first request worth running.
A generated reference can cover more surface as the API changes. It cannot know whether a list endpoint is harmless in your product, whether a retry is safe, or which permission problem a developer can solve without support.
Add recovery, events, and changes before the API grows
An error guide needs more than a table of status codes. For each recoverable failure, name the state that caused it, the response field or request identifier worth inspecting, the action that changes the state, and the point where support must investigate.
Cloudflare publishes a distinct API reference route, giving guides stable destinations for exact operations. Keep a recovery link near the operation or error it explains, because a generic support page makes a developer reconstruct the failed request from scratch.
Webhooks and version changes often arrive later because they do not block the first demo. They become expensive omissions once integrations depend on event verification, replay behavior, deprecated fields, or a migration date, so give them a page owner before the outline grows.
Use the template to create a working API docs route
The API documentation best-practices guide explains the first-request path in more detail. The developer portal examples guide helps you inspect whether a portal keeps that path visible once the reference grows.
Fill the outline around one safe request first. If a developer can choose a route, authenticate, send that request, inspect its contract, recover from a predictable failure, and find the next change, you have the spine of an API docs project instead of a list of pages.