---
title: "API Documentation Template"
description: "This template defines the standard structure and conventions for API documents within the Sirius project, ensuring comprehensive API specifications and usage documentation."
template: "TEMPLATE.template"
version: "1.0.0"
last_updated: "2025-01-03"
author: "AI Assistant"
tags: ["template", "api", "endpoints", "specifications", "integration"]
categories: ["project-management", "development"]
difficulty: "intermediate"
prerequisites: ["ABOUT.documentation.md"]
related_docs:
  - "ABOUT.documentation.md"
  - "TEMPLATE.documentation-standard.md"
dependencies: []
llm_context: "high"
search_keywords:
  ["api template", "endpoints", "api documentation", "integration specs"]
---

# [API Name] API Documentation

## Purpose

This document provides comprehensive API documentation for [specific API/service] within the Sirius project. API documents serve as authoritative sources for endpoint specifications, request/response formats, authentication, and integration examples.

## When to Use

- **API Integration**: When implementing client applications
- **API Development**: When building or modifying API endpoints
- **Testing**: When writing tests for API functionality
- **Debugging**: When troubleshooting API issues
- **Code Review**: When reviewing API implementation

## How to Use

### Quick Start

1. **Check the Base URL** and authentication requirements
2. **Review the Common Patterns** for typical usage
3. **Find the specific endpoint** you need
4. **Follow the examples** for implementation
5. **Use the troubleshooting section** for common issues

### Base URL

```
http://localhost:9001/api/v1
```

### Authentication

[Description of authentication method - API key, JWT, OAuth, etc.]

```bash
# Example authentication
curl -H "Authorization: Bearer <token>" \
  -H "Content-Type: application/json" \
  http://localhost:9001/api/v1/endpoint
```

## What It Is

### API Overview

[Description of what this API does, its purpose, and key capabilities]

### Endpoints

#### [Endpoint 1]

- **Method**: `GET|POST|PUT|DELETE`
- **Path**: `/api/v1/endpoint1`
- **Description**: [What this endpoint does]
- **Authentication**: [Required/Optional]
- **Parameters**:
  - `param1` (required, string): [Description]
  - `param2` (optional, integer): [Description]
- **Request Body**: [If applicable]
- **Response**: [Response format and status codes]
- **Example Request**:

```bash
curl -X GET "http://localhost:9001/api/v1/endpoint1?param1=value&param2=123" \
  -H "Authorization: Bearer <token>"
```

- **Example Response**:

```json
{
  "status": "success",
  "data": {
    "field1": "value1",
    "field2": "value2"
  }
}
```

#### [Endpoint 2]

- **Method**: `GET|POST|PUT|DELETE`
- **Path**: `/api/v1/endpoint2`
- **Description**: [What this endpoint does]
- **Authentication**: [Required/Optional]
- **Request Body**:

```json
{
  "field1": "string",
  "field2": "integer",
  "field3": {
    "nested_field": "string"
  }
}
```

- **Response**: [Response format and status codes]
- **Example Request**:

```bash
curl -X POST "http://localhost:9001/api/v1/endpoint2" \
  -H "Authorization: Bearer <token>" \
  -H "Content-Type: application/json" \
  -d '{
    "field1": "value1",
    "field2": 123,
    "field3": {
      "nested_field": "nested_value"
    }
  }'
```

- **Example Response**:

```json
{
  "status": "success",
  "data": {
    "id": "generated_id",
    "field1": "value1",
    "field2": 123
  }
}
```

### Data Models

#### [Model 1]

```json
{
  "id": "string",
  "name": "string",
  "description": "string",
  "created_at": "datetime",
  "updated_at": "datetime"
}
```

#### [Model 2]

```json
{
  "id": "string",
  "field1": "string",
  "field2": "integer",
  "field3": {
    "nested_field": "string"
  },
  "field4": ["string"]
}
```

### Error Responses

#### Standard Error Format

```json
{
  "status": "error",
  "error": {
    "code": "ERROR_CODE",
    "message": "Human readable error message",
    "details": "Additional error details"
  }
}
```

#### Common Error Codes

| Code              | HTTP Status | Description               | Resolution                         |
| ----------------- | ----------- | ------------------------- | ---------------------------------- |
| `INVALID_REQUEST` | 400         | Request format is invalid | Check request body and parameters  |
| `UNAUTHORIZED`    | 401         | Authentication required   | Provide valid authentication token |
| `FORBIDDEN`       | 403         | Insufficient permissions  | Check user permissions             |
| `NOT_FOUND`       | 404         | Resource not found        | Verify resource ID and existence   |
| `INTERNAL_ERROR`  | 500         | Server error              | Contact support or retry later     |

### Rate Limiting

- **Limit**: [Requests per time period]
- **Headers**: [Rate limit headers returned]
- **Example**: `X-RateLimit-Limit: 1000, X-RateLimit-Remaining: 999`

### Pagination

- **Method**: [Offset-based, cursor-based, etc.]
- **Parameters**: [page, limit, offset, etc.]
- **Response Format**: [How pagination data is returned]

```json
{
  "data": [...],
  "pagination": {
    "page": 1,
    "limit": 20,
    "total": 100,
    "pages": 5
  }
}
```

## Troubleshooting

### FAQ

**Q: [Common API question 1]**
A: [Answer with specific examples and solutions]

**Q: [Common API question 2]**
A: [Answer with specific examples and solutions]

**Q: [Common API question 3]**
A: [Answer with specific examples and solutions]

### Command Reference

| Command        | Purpose        | Example     | Notes              |
| -------------- | -------------- | ----------- | ------------------ |
| `curl -X GET`  | [What it does] | `[example]` | [Additional notes] |
| `curl -X POST` | [What it does] | `[example]` | [Additional notes] |
| `curl -X PUT`  | [What it does] | `[example]` | [Additional notes] |

### Common Issues

| Issue     | Symptoms          | Root Cause       | Solution           |
| --------- | ----------------- | ---------------- | ------------------ |
| [Issue 1] | [How to identify] | [Why it happens] | [Step-by-step fix] |
| [Issue 2] | [How to identify] | [Why it happens] | [Step-by-step fix] |
| [Issue 3] | [How to identify] | [Why it happens] | [Step-by-step fix] |

### Debugging Steps

1. **Check [specific thing]**: [How to check and what to look for]
2. **Verify [specific thing]**: [How to verify and expected results]
3. **Test [specific thing]**: [How to test and success criteria]
4. **Review [specific thing]**: [What to review and common patterns]

## Lessons Learned

### [Date] - [What was learned]

[Description of API lesson learned and how it improved the system]

### [Date] - [What was learned]

[Description of API lesson learned and how it improved the system]

---

_This document follows the Sirius Documentation Standard. For questions about documentation structure, see [ABOUT.documentation.md](../ABOUT.documentation.md)._