curl -X GET https://api.rapidcall.ai/api/billing/recent-usage \
  -H "Authorization: Bearer YOUR_API_KEY"

{
  "usage": [
    {
      "callId": "call_8f3a2b1c4d5e",
      "agentName": "Sales Assistant",
      "type": "inbound",
      "duration": 185,
      "model": "gpt-4.1",
      "cost": {
        "total": 0.0387,
        "llm": 0.0215,
        "tts": 0.0114,
        "stt": 0.0028,
        "telephony": 0.0030
      },
      "createdAt": "2026-04-02T14:22:00Z"
    },
    {
      "callId": "call_1a2b3c4d5e6f",
      "agentName": "Support Agent",
      "type": "inbound",
      "duration": 312,
      "model": "claude-3.5-sonnet",
      "cost": {
        "total": 0.0642,
        "llm": 0.0418,
        "tts": 0.0152,
        "stt": 0.0042,
        "telephony": 0.0030
      },
      "createdAt": "2026-04-02T13:15:00Z"
    },
    {
      "callId": "call_7g8h9i0j1k2l",
      "agentName": "Sales Outreach Agent",
      "type": "outbound",
      "duration": 97,
      "model": "gpt-4o",
      "cost": {
        "total": 0.0156,
        "llm": 0.0078,
        "tts": 0.0048,
        "stt": 0.0015,
        "telephony": 0.0015
      },
      "createdAt": "2026-04-02T11:48:00Z"
    }
  ],
  "periodTotal": 142.87
}