IG Trading MCP

Instructions

Implementation Reference

• src/services/ig-service.js:67-83 (handler)

  Core handler function that switches the IG trading account by sending a PUT request to '/session' endpoint with the accountId and updates the session tokens.

  async switchAccount(accountId) {
    try {
      const response = await this.apiClient.put('/session', { accountId }, 1);
      
      config.setSessionTokens({
        'x-security-token': response.headers['x-security-token'],
        cst: response.headers.cst,
        lightstreamerEndpoint: config.sessionTokens.lightstreamerEndpoint,
        currentAccountId: accountId
      });
  
      logger.info(`Switched to account: ${accountId}`);
      return response.data;
    } catch (error) {
      logger.error('Account switch failed:', error.message);
      throw error;
    }

• src/services/mcp-service.js:100-113 (schema)

  Tool schema definition including input validation requiring 'accountId'.

  {
    name: 'ig_switch_account',
    description: 'Switch to a different trading account',
    inputSchema: {
      type: 'object',
      properties: {
        accountId: {
          type: 'string',
          description: 'Account ID to switch to',
        },
      },
      required: ['accountId'],
    },
  },

• src/services/mcp-service.js:567-576 (handler)

  MCP server dispatch handler that calls the igService.switchAccount method and formats the response.

  case 'ig_switch_account':
    const switchResult = await igService.switchAccount(args.accountId);
    return {
      content: [
        {
          type: 'text',
          text: JSON.stringify(switchResult, null, 2),
        },
      ],
    };

• src/services/mcp-service.js:506-509 (registration)

  Registers the list of tools including ig_switch_account by returning the TOOLS array in response to ListToolsRequest.

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