# Verify API Key (WordPress Plugin)

**GET /api/v1/plugin/status**

Verify that an API key is valid and retrieve site information. This endpoint is used by the WordPress plugin to verify the connection and display quota information.

**Authentication**: Required (API Key)

**Headers**:
- `Authorization: Bearer {api_key}`

**Example Request**:

```bash
curl -X GET http://localhost:8000/api/v1/plugin/status \
  -H "Authorization: Bearer live_sk_a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6q7r8s9t0"
```

**Example Response** (200 OK):

```json
{
  "site_id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "tenant_id": "t1t2t3t4-t5t6-7890-tttt-tttttttttttt",
  "domain": "example.com",
  "site_url": "https://example.com",
  "status": "active",
  "is_verified": true,
  "storage_used_bytes": 52428800,
  "search_requests_count": 234,
  "monthly_pages_indexed": 50,
  "total_pages_indexed": 145,
  "search_index_name": "site_a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "api_key_prefix": "live_sk_a1b2",
  "api_key_last_four": "s9t0",
  "plugin_version": "1.0.0",
  "message": "API key is valid"
}
```

**Notes**:
- Used by WordPress plugin to verify connection on plugin activation
- Returns site information and usage tracking statistics
- If the API key is invalid or missing, returns 401 Unauthorized
- Usage-based billing: No quotas or limits, only usage tracking for billing
- If the request reaches this handler, the API key has already been validated by the middleware
- API key must start with `live_sk_` or `test_sk_` prefix

**Error Responses**:

This endpoint returns errors in **RFC 9457 (Problem Details for HTTP APIs)** format.

**Content-Type**: `application/problem+json`

**401 Unauthorized** - Invalid or missing API key:
```json
{
  "type": "about:blank",
  "title": "Unauthorized",
  "status": 401,
  "detail": "Invalid or missing API key"
}
```

**500 Internal Server Error**:
```json
{
  "type": "about:blank",
  "title": "Internal Server Error",
  "status": 500,
  "detail": "Failed to verify API key"
}
```
