Polygon MCP Server

Instructions

Implementation Reference

• src/index.ts:62-80 (handler)

  The handler function for get_latest_quote tool. Fetches the latest NBBO quote from Polygon API for the specified ticker and returns the JSON response or an error message.

  get_latest_quote: async (args: { ticker: string }) => {
    try {
      const response = await polygonApi.get(`/v2/last/nbbo/${args.ticker}`);
      return {
        content: [{
          type: "text",
          text: JSON.stringify(response.data, null, 2)
        }]
      };
    } catch (error: any) {
      return {
        content: [{
          type: "text",
          text: `Error getting latest quote: ${error.response?.data?.message || error.message}`
        }],
        isError: true
      };
    }
  },

• src/index.ts:258-271 (registration)

  Tool registration in the ListTools handler, specifying name, description, and input schema for get_latest_quote.

  {
    name: "get_latest_quote",
    description: "Get real-time quote for a ticker",
    inputSchema: {
      type: "object",
      properties: {
        ticker: {
          type: "string",
          description: "Ticker symbol (e.g., AAPL)"
        }
      },
      required: ["ticker"]
    }
  },

• src/index.ts:261-270 (schema)

  Input schema definition for the get_latest_quote tool, requiring a 'ticker' string parameter.

  inputSchema: {
    type: "object",
    properties: {
      ticker: {
        type: "string",
        description: "Ticker symbol (e.g., AAPL)"
      }
    },
    required: ["ticker"]
  }