Lunch Money MCP Server

import { z } from "zod"; import axios from "axios"; // Export schema object for MCP tool registration (DRY principle) export const getTransactionsInputSchema = { start_date: z.string().optional().describe("Start date (YYYY-MM-DD)"), end_date: z.string().optional().describe("End date (YYYY-MM-DD)"), category_id: z.number().optional().describe("Filter by category ID"), }; // Create Zod object for type inference const getTransactionsArgsSchema = z.object(getTransactionsInputSchema); export async function handleGetTransactions( args: z.infer<typeof getTransactionsArgsSchema> ) { try { // Validate API key is present const apiKey = process.env.LUNCH_MONEY_API_KEY; if (!apiKey) { return { content: [ { type: "text" as const, text: "Error: LUNCH_MONEY_API_KEY environment variable is required", }, ], isError: true, }; } const { start_date, end_date, category_id } = args; // Build URL with query parameters using native URLSearchParams const url = new URL("https://dev.lunchmoney.app/v1/transactions"); if (start_date) url.searchParams.append("start_date", start_date); if (end_date) url.searchParams.append("end_date", end_date); if (category_id) url.searchParams.append("category_id", String(category_id)); const response = await axios.get(url.toString(), { headers: { Authorization: `Bearer ${apiKey}`, }, }); return { content: [ { type: "text" as const, text: JSON.stringify(response.data, null, 2), }, ], }; } catch (error) { return { content: [ { type: "text" as const, text: `Error fetching transactions: ${ error instanceof Error ? error.message : String(error) }`, }, ], isError: true, }; } }