curl --request GET \
  --url https://openrouter.ai/api/v1/images/models \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "architecture": {
        "input_modalities": [
          "text"
        ],
        "output_modalities": [
          "image"
        ]
      },
      "created": 1692901234,
      "description": "A text-to-image model.",
      "endpoints": "/api/v1/images/models/bytedance-seed/seedream-4.5/endpoints",
      "id": "bytedance-seed/seedream-4.5",
      "name": "Seedream 4.5",
      "supported_parameters": {
        "resolution": {
          "type": "enum",
          "values": [
            "1K",
            "2K",
            "4K"
          ]
        }
      },
      "supports_streaming": false
    }
  ]
}