Endpoint documentation structure in Rest API - Step-by-Step Execution

Concept Flow - Endpoint documentation structure

Start

↓

Define Endpoint URL

↓

Specify HTTP Method

↓

Describe Purpose

↓

List Request Parameters

↓

Show Request Example

↓

List Response Fields

↓

Show Response Example

↓

Add Error Codes

↓

End

This flow shows the steps to write clear API endpoint documentation from URL to errors.

Execution Sample

Rest API

GET /users/{id}
Description: Get user info
Parameters: id (path, required)
Response: 200 OK with user data
Errors: 404 if user not found

This example documents a GET endpoint to fetch user info by ID.

Execution Table

Step	Section	Action	Details
1	Define Endpoint URL	Set URL pattern	/users/{id}
2	Specify HTTP Method	Choose method	GET
3	Describe Purpose	Explain what it does	Get user info by ID
4	List Request Parameters	Detail parameters	id (path, required)
5	Show Request Example	Provide example	GET /users/123
6	List Response Fields	Describe response data	User object with id, name, email
7	Show Response Example	Provide example	{ "id": 123, "name": "Alice", "email": "[e-mail]" }
8	Add Error Codes	List possible errors	404 if user not found
9	End	Finish documentation	Complete endpoint doc

💡 All sections completed to fully document the endpoint.

Variable Tracker

Section	Content
Endpoint URL	/users/{id}
HTTP Method	GET
Purpose	Get user info by ID
Request Parameters	id (path, required)
Request Example	GET /users/123
Response Fields	User object with id, name, email
Response Example	{ "id": 123, "name": "Alice", "email": "[e-mail]" }
Error Codes	404 if user not found

Key Moments - 3 Insights

Why do we specify HTTP method separately from the URL?

Because the same URL can support different actions like GET or POST, so specifying method clarifies what the endpoint does (see execution_table step 2).

What is the purpose of showing request and response examples?

Examples help users understand how to call the endpoint and what data to expect, making the documentation practical (see execution_table steps 5 and 7).

Why list error codes in endpoint documentation?

To inform users what errors might happen and how to handle them, improving robustness (see execution_table step 8).

Visual Quiz - 3 Questions

Look at the execution table, what HTTP method is used for the endpoint?

A PUT

B POST

C GET

D DELETE

💡 Hint

Check step 2 in the execution_table where HTTP Method is specified.

At which step do we provide an example of the response data?

A Step 4

B Step 7

C Step 5

D Step 8

💡 Hint

Look for the step labeled 'Show Response Example' in the execution_table.

If the endpoint had no errors to document, which step would be skipped?

A Step 8

B Step 6

C Step 3

D Step 9

💡 Hint

Step 8 is about adding error codes, see execution_table.

Concept Snapshot

Endpoint documentation structure:
- Define URL and HTTP method
- Describe purpose clearly
- List request parameters
- Show request and response examples
- Include response fields
- Add error codes if any
This helps users understand and use the API endpoint correctly.

Full Transcript

Endpoint documentation structure guides writing clear API docs. Start by defining the endpoint URL and HTTP method. Then describe what the endpoint does. List all request parameters with details. Provide examples of requests and responses to show usage. Describe response fields so users know what data to expect. Finally, add error codes to inform users about possible failures. This step-by-step approach ensures the documentation is complete and easy to follow.