QuantConnect MCP Server

Instructions

Implementation Reference

• quantconnect_mcp/src/tools/file_tools.py:186-263 (handler)

  The core handler function for the 'update_file_content' tool, decorated with @mcp.tool() and implementing the logic to update file content in a QuantConnect project via authenticated API request.

  @mcp.tool()
  async def update_file_content(
      project_id: int, name: str, content: str
  ) -> Dict[str, Any]:
      """
      Update the content of a file in a QuantConnect project.
  
      Args:
          project_id: ID of the project containing the file
          name: Name of the file to update
          content: New content for the file
  
      Returns:
          Dictionary containing update result
      """
      auth = get_auth_instance()
      if auth is None:
          return {
              "status": "error",
              "error": "QuantConnect authentication not configured. Use configure_auth() first.",
          }
  
      try:
          # Prepare request data
          request_data = {"projectId": project_id, "name": name, "content": content}
  
          # Make API request
          response = await auth.make_authenticated_request(
              endpoint="files/update", method="POST", json=request_data
          )
  
          # Parse response
          if response.status_code == 200:
              data = response.json()
  
              if data.get("success", False):
                  return {
                      "status": "success",
                      "project_id": project_id,
                      "file_name": name,
                      "content_length": len(content),
                      "message": f"Successfully updated content of file '{name}' in project {project_id}",
                  }
              else:
                  # API returned success=false
                  errors = data.get("errors", ["Unknown error"])
                  return {
                      "status": "error",
                      "error": "File content update failed",
                      "details": errors,
                      "project_id": project_id,
                      "file_name": name,
                  }
  
          elif response.status_code == 401:
              return {
                  "status": "error",
                  "error": "Authentication failed. Check your credentials and ensure they haven't expired.",
              }
  
          else:
              return {
                  "status": "error",
                  "error": f"API request failed with status {response.status_code}",
                  "response_text": (
                      response.text[:500]
                      if hasattr(response, "text")
                      else "No response text"
                  ),
              }
  
      except Exception as e:
          return {
              "status": "error",
              "error": f"Failed to update file content: {str(e)}",
              "project_id": project_id,
              "file_name": name,
          }

• quantconnect_mcp/main.py:46-52 (registration)

  Entry point registration block calling register_file_tools(mcp), which registers the update_file_content tool among file tools.

  safe_print("🔧 Registering QuantConnect tools...")
  register_auth_tools(mcp)
  register_project_tools(mcp)
  register_file_tools(mcp)
  register_backtest_tools(mcp)
  register_live_tools(mcp)
  register_optimization_tools(mcp)

• quantconnect_mcp/src/server.py:73-79 (registration)

  Server core registration block calling register_file_tools(mcp) to register the file tools including update_file_content.

  safe_print("🔧 Registering QuantConnect tools...")
  register_auth_tools(mcp)
  register_project_tools(mcp)
  register_file_tools(mcp)
  register_backtest_tools(mcp)
  register_live_tools(mcp)
  register_optimization_tools(mcp)

• quantconnect_mcp/src/tools/file_tools.py:8-8 (registration)

  The register_file_tools function definition, which contains the @mcp.tool() decorators for all file tools including update_file_content.

  def register_file_tools(mcp: FastMCP):