fetchOHLCV

Instructions

Implementation Reference

• src/tools/market-tools.ts:196-247 (registration)

  Registers the 'fetchOHLCV' tool on the MCP server, including description, input schema, and inline handler function.

    server.tool(
      "fetchOHLCV",
      "Fetch OHLCV candlestick data for a symbol on an exchange",
      {
        exchangeId: z.string().describe("Exchange ID (e.g., 'binance', 'coinbase')"),
        symbol: z.string().describe("Trading symbol (e.g., 'BTC/USDT')"),
        timeframe: z.string().default("1h").describe("Timeframe (e.g., '1m', '5m', '1h', '1d')"),
        since: z.number().optional().describe("Timestamp in ms to fetch data since (optional)"),
        limit: z.number().optional().describe("Limit the number of candles returned (optional)")
      },
      async ({ exchangeId, symbol, timeframe, since, limit }) => {
        try {
          // 공개 인스턴스 사용
          const exchange = ccxtServer.getPublicExchangeInstance(exchangeId);
  
          // 거래소가 OHLCV 데이터를 지원하는지 확인
          if (!exchange.has['fetchOHLCV']) {
            return {
              content: [
                {
                  type: "text",
                  text: `Exchange ${exchangeId} does not support OHLCV data fetching`
                }
              ],
              isError: true
            };
          }
          
          const ohlcv = await exchange.fetchOHLCV(symbol, timeframe, since, limit);
          
          return {
            content: [
              {
                type: "text",
                text: JSON.stringify(ohlcv, null, 2)
              }
            ]
          };
        } catch (error) {
          return {
            content: [
              {
                type: "text",
                text: `Error fetching OHLCV data: ${(error as Error).message}`
              }
            ],
            isError: true
          };
        }
      }
    );
  }

• src/tools/market-tools.ts:206-246 (handler)

  The handler function that implements the core logic: retrieves public CCXT exchange instance, checks support for fetchOHLCV, fetches the data, and returns JSON stringified OHLCV array or error.

    async ({ exchangeId, symbol, timeframe, since, limit }) => {
      try {
        // 공개 인스턴스 사용
        const exchange = ccxtServer.getPublicExchangeInstance(exchangeId);
  
        // 거래소가 OHLCV 데이터를 지원하는지 확인
        if (!exchange.has['fetchOHLCV']) {
          return {
            content: [
              {
                type: "text",
                text: `Exchange ${exchangeId} does not support OHLCV data fetching`
              }
            ],
            isError: true
          };
        }
        
        const ohlcv = await exchange.fetchOHLCV(symbol, timeframe, since, limit);
        
        return {
          content: [
            {
              type: "text",
              text: JSON.stringify(ohlcv, null, 2)
            }
          ]
        };
      } catch (error) {
        return {
          content: [
            {
              type: "text",
              text: `Error fetching OHLCV data: ${(error as Error).message}`
            }
          ],
          isError: true
        };
      }
    }
  );

• src/tools/market-tools.ts:199-205 (schema)

  Zod schema for input validation: exchangeId (string), symbol (string), timeframe (string, default '1h'), since (number optional), limit (number optional).

  {
    exchangeId: z.string().describe("Exchange ID (e.g., 'binance', 'coinbase')"),
    symbol: z.string().describe("Trading symbol (e.g., 'BTC/USDT')"),
    timeframe: z.string().default("1h").describe("Timeframe (e.g., '1m', '5m', '1h', '1d')"),
    since: z.number().optional().describe("Timestamp in ms to fetch data since (optional)"),
    limit: z.number().optional().describe("Limit the number of candles returned (optional)")
  },

• src/server.ts:372-372 (registration)

  Top-level call to registerMarketTools in CcxtMcpServer's registerTools method, which includes registration of fetchOHLCV.

  registerMarketTools(this.server, this);