IG Trading MCP

Instructions

Implementation Reference

• src/services/ig-service.js:465-473 (handler)

  Core handler function that executes the tool logic by sending a PUT request to the IG API to add the specified epic to the watchlist.

  async addToWatchlist(watchlistId, epic) {
    try {
      const response = await this.apiClient.put(`/watchlists/${watchlistId}`, { epic });
      return response.data;
    } catch (error) {
      logger.error(`Failed to add ${epic} to watchlist:`, error.message);
      throw error;
    }
  }

• src/services/mcp-service.js:766-775 (handler)

  MCP server dispatch handler for the tool that calls the IGService method and formats the response.

  case 'ig_add_to_watchlist':
    const addResult = await igService.addToWatchlist(args.watchlistId, args.epic);
    return {
      content: [
        {
          type: 'text',
          text: JSON.stringify(addResult, null, 2),
        },
      ],
    };

• src/services/mcp-service.js:485-502 (schema)

  Tool schema definition including name, description, and input schema used for registration and validation.

  {
    name: 'ig_add_to_watchlist',
    description: 'Add an epic to a watchlist',
    inputSchema: {
      type: 'object',
      properties: {
        watchlistId: {
          type: 'string',
          description: 'Watchlist ID',
        },
        epic: {
          type: 'string',
          description: 'Epic to add',
        },
      },
      required: ['watchlistId', 'epic'],
    },
  },

• src/services/mcp-service.js:506-510 (registration)

  Registers all tools including ig_add_to_watchlist by setting the ListToolsRequestHandler to return the TOOLS array.

  server.setRequestHandler(ListToolsRequestSchema, async () => {
    return {
      tools: TOOLS,
    };
  });