Polygon MCP Server

Instructions

Implementation Reference

• src/index.ts:119-137 (handler)

  The asynchronous handler function that implements the get_daily_open_close tool by calling the Polygon API to retrieve daily open and close prices for a given ticker and date.

  get_daily_open_close: async (args: { ticker: string; date: string }) => {
    try {
      const response = await polygonApi.get(`/v1/open-close/${args.ticker}/${args.date}`);
      return {
        content: [{
          type: "text",
          text: JSON.stringify(response.data, null, 2)
        }]
      };
    } catch (error: any) {
      return {
        content: [{
          type: "text",
          text: `Error getting daily open/close: ${error.response?.data?.message || error.message}`
        }],
        isError: true
      };
    }
  },

• src/index.ts:312-329 (registration)

  Registration of the get_daily_open_close tool in the ListTools handler, including its name, description, and input schema for validation.

  {
    name: "get_daily_open_close",
    description: "Get daily open/close prices",
    inputSchema: {
      type: "object",
      properties: {
        ticker: {
          type: "string",
          description: "Ticker symbol (e.g., AAPL)"
        },
        date: {
          type: "string",
          description: "Date (YYYY-MM-DD format)"
        }
      },
      required: ["ticker", "date"]
    }
  },

• src/index.ts:315-328 (schema)

  Input schema defining the parameters (ticker and date) for the get_daily_open_close tool.

  inputSchema: {
    type: "object",
    properties: {
      ticker: {
        type: "string",
        description: "Ticker symbol (e.g., AAPL)"
      },
      date: {
        type: "string",
        description: "Date (YYYY-MM-DD format)"
      }
    },
    required: ["ticker", "date"]
  }