heyibad/quickbook-mcp

Add input validation to customer handler

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#1 opened on Oct 26, 2025

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enhancementgood first issuehacktoberfest

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Description

Description

The customer handler (create-quickbooks-customer.handler.ts) currently accepts any customer data without validating required fields. This can lead to API errors and poor user experience.

Proposed Solution

Add Zod schema validation for customer data before making API calls to QuickBooks.

Requirements

  • Create a Zod schema for customer data validation
  • Add validation before API call in createQuickbooksCustomer function
  • Return clear validation errors to the user
  • Update tests to cover validation scenarios

Example Implementation

\\ ypescript import { z } from 'zod';

const CustomerSchema = z.object({ DisplayName: z.string().min(1, 'Display name is required'), // Add other required fields }); \`n

Benefits

  • Better error messages for users
  • Catch errors before API calls
  • Improve code reliability

Contributor guide

Research direction
Look at the existing create quickbooks customer.handler.ts file and the QuickBooks API documentation to understand the required fields for customer creation. Then implement a Zod schema that validates these fields and integrate it into the handler function before the API call.
Tech stack
typescriptnodejs
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GitTypeScriptZod
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70