Singapore LTA MCP Server

Instructions

Implementation Reference

• src/index.ts:209-236 (handler)

  The handler for the 'train_alerts' tool. Fetches real-time train service alerts from the LTA DataMall API using axios and returns the JSON response or an error message.

  case "train_alerts": {
    try {
      const response = await axios.get('https://datamall2.mytransport.sg/ltaodataservice/TrainServiceAlerts', {
        headers: {
          'AccountKey': process.env.LTA_API_KEY!,
          'accept': 'application/json'
        }
      });
      
      return {
        content: [{
          type: "text",
          text: JSON.stringify(response.data, null, 2)
        }]
      };
    } catch (error) {
      if (axios.isAxiosError(error)) {
        return {
          content: [{
            type: "text",
            text: `LTA API error: ${error.response?.data?.Message ?? error.message}`
          }],
          isError: true
        };
      }
      throw error;
    }
  }

• src/index.ts:82-89 (schema)

  The input schema and description for the 'train_alerts' tool, registered in the ListTools response. No input parameters are required.

  {
    name: "train_alerts",
    description: "Get real-time train service alerts including service disruptions and shuttle services. Updates when there are changes.",
    inputSchema: {
      type: "object",
      properties: {} // No parameters needed
    }
  },