> ## Documentation Index
> Fetch the complete documentation index at: https://docs.chatgrid.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Create Edge

> Creates a connection between two nodes on the same board.

Both the source and target nodes must exist on the specified board. If either
node is missing, a `404` error is returned.

<RequestExample>
  ```bash cURL theme={null}
  curl -X POST "https://api.chatgrid.ai/v1/boards/a1b2c3d4-e5f6-7890-abcd-ef1234567890/edges" \
    -H "Authorization: Bearer cgk_live_a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6" \
    -H "Content-Type: application/json" \
    -d '{
      "source_node_id": "e5f6a7b8-c9d0-1234-efab-345678901234",
      "target_node_id": "11223344-5566-7788-99aa-bbccddeeff00",
      "type": "data-flow",
      "data": { "weight": 1.0 }
    }'
  ```
</RequestExample>

<ResponseExample>
  ```json 201 theme={null}
  {
    "object": "edge",
    "data": {
      "id": "f6a7b8c9-d0e1-2345-fabc-456789012345",
      "board_id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
      "source_node_id": "e5f6a7b8-c9d0-1234-efab-345678901234",
      "target_node_id": "11223344-5566-7788-99aa-bbccddeeff00",
      "edge_type": "data-flow",
      "edge_data": { "weight": 1.0 },
      "created_at": "2026-03-15T10:35:00.000Z",
      "updated_at": "2026-03-15T10:35:00.000Z"
    }
  }
  ```

  ```json 404 (node not found) theme={null}
  {
    "object": "error",
    "status": 404,
    "code": "not_found",
    "message": "Source node not found on this board"
  }
  ```
</ResponseExample>