Zerodha Trading Bot

Instructions

Implementation Reference

• index.js:67-80 (registration)

  Registration of the 'Buy-Stock' MCP tool, including inline Zod input schema and the main handler function that initializes the trading client and delegates to placeOrder.
  server.tool( "Buy-Stock", "This tool buys a stock in the zerodha trading platform for the given quantity and stock name at the current market price for the given user", { stock: z.string(), qty: z.number() }, async ({ stock, qty }) => { try { const trading = await initializeTrading(); const response = await trading.placeOrder(stock, qty, "BUY"); return { content: [{ type: "text", text: String(response) }] }; } catch (error) { return { content: [{ type: "text", text: `Error: ${error.message}` }] }; } } );
• index.js:71-79 (handler)

  The inline handler function for the Buy-Stock tool, which handles input parameters, initializes trading, places the BUY order, and returns response or error.
  async ({ stock, qty }) => { try { const trading = await initializeTrading(); const response = await trading.placeOrder(stock, qty, "BUY"); return { content: [{ type: "text", text: String(response) }] }; } catch (error) { return { content: [{ type: "text", text: `Error: ${error.message}` }] }; } }
• index.js:70-70 (schema)

  Zod schema for Buy-Stock tool input: stock (string), qty (number).
  { stock: z.string(), qty: z.number() },
• trading.js:15-39 (helper)

  Supporting helper: placeOrder method in ZerodhaTrading class that performs the actual market order placement via KiteConnect API.
  async placeOrder(tradingsymbol, quantity, type) { if (!tradingsymbol || !quantity || !type) { throw new Error( "Please provide all required parameters: tradingsymbol, quantity, and type" ); } try { const response = await this.kc.placeOrder("regular", { exchange: "NSE", tradingsymbol: tradingsymbol, transaction_type: type, quantity: quantity, product: "CNC", order_type: "MARKET", }); return response; } catch (err) { if (err.error_type === "InputException") { throw new Error( `Invalid trading symbol or order parameters: ${err.message}` ); } throw err; }
• index.js:16-24 (helper)

  Supporting helper: initializeTrading function that obtains a valid access token and instantiates the ZerodhaTrading client.
  async function initializeTrading() { try { const accessToken = await tokenManager.getValidToken(); return new ZerodhaTrading(apiKey, accessToken); } catch (error) { console.error("Error initializing trading:", error.message); throw error; } }