docs/architecture/6-api-design-and-integration.md

# 6. API Design and Integration

### 6.1 API Integration Strategy
**API Integration Strategy:** Extend existing `/api/posts` endpoints while maintaining compatibility
**Authentication:** Use existing JWT token authentication
**Versioning:** No versioning needed, following existing API patterns

### 6.2 New API Endpoints

#### POST /api/posts/keyword-analysis
**Method:** POST
**Endpoint:** /api/posts/keyword-analysis
**Purpose:** Analyze keyword frequency and relevance
**Integration:** With existing posts API and authentication

**Request:**
```json
{
  "keywords": ["keyword1", "keyword2"]
}
```

**Response:**
```json
{
  "results": {
    "keyword1": "daily",
    "keyword2": "weekly"
  },
  "status": "success"
}
```