curl "https://api.chatgrid.ai/v1/boards/a1b2c3d4-e5f6-7890-abcd-ef1234567890/chats/b2c3d4e5-f6a7-8901-bcde-f12345678901/messages?limit=50" \
  -H "Authorization: Bearer cgk_live_a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6"

{
  "object": "list",
  "data": [
    {
      "id": "d4e5f6a7-b8c9-0123-defa-234567890123",
      "role": "user",
      "content": "What are the top SaaS marketing channels?",
      "model": null,
      "created_at": "2026-03-15T12:50:00.000Z",
      "metadata": null
    },
    {
      "id": "e5f6a7b8-c9d0-1234-efab-345678901234",
      "role": "assistant",
      "content": "Here are the top 3 SaaS marketing channels:\n\n1. **Content Marketing & SEO** ...",
      "model": "anthropic/claude-sonnet-4",
      "created_at": "2026-03-15T12:50:05.000Z",
      "metadata": {
        "usage": {
          "prompt_tokens": 245,
          "completion_tokens": 312,
          "total_tokens": 557
        },
        "finish_reason": "stop"
      }
    }
  ],
  "has_more": false,
  "cursor": null
}