Testing for your GPT Engineer-built Express app
Expert testing for Express apps built with GPT Engineer. We audit GPT Engineer-generated Express code for testing issues. From $19.
GPT Engineer issues we find in Express projects
Problems specific to GPT Engineer's code generation patterns when building Express apps.
No authentication system
GPT Engineer generates functional UIs but typically skips authentication entirely. All routes and data are publicly accessible.
Direct database access from client
Some generated apps query databases directly from the frontend without an API layer, exposing database credentials and structure.
Incomplete feature implementations
Features that look complete in the UI but don't actually work end-to-end. Buttons that don't submit, forms that don't save, and links that go nowhere.
Express testing issues we check for
Testing-specific Express problems that need attention before production.
No helmet middleware for security headers
Express apps without the helmet middleware are missing critical security headers like Content-Security-Policy, X-Content-Type-Options, and HSTS, leaving the app vulnerable to common web attacks.
Missing input validation and sanitization
Request body, query params, and URL params used directly without validation. No express-validator, zod, or joi — enabling injection attacks and unexpected crashes.
Unstructured error handling
No global error-handling middleware. Errors either crash the process, leak stack traces to clients, or get silently swallowed with no logging.
What our testing covers
Everything included when we testing your GPT Engineer Express project.
Start with a self-serve audit
Get a professional testing of your GPT Engineer Express project at a fixed price.
External Security Scan
Black-box review of your public-facing app. No code access needed.
- OWASP Top 10 vulnerability check
- SSL/TLS configuration analysis
- Security header assessment
- Expert review within 24h
Code Audit
In-depth review of your source code for security, quality, and best practices.
- Security vulnerability analysis
- Code quality review
- Dependency audit
- Architecture review
- Expert + AI code analysis
Complete Bundle
Both scans in one package with cross-referenced findings.
- Everything in both products
- Cross-referenced findings
- Unified action plan
100% credited toward any paid service. Start with an audit, then let us fix what we find.
How it works
Three steps to get your GPT Engineer Express app production-ready.
Tell us about your app
Share your project details and what you need help with.
Expert + AI audit
A human expert assisted by AI reviews your code within 24 hours.
Launch with confidence
We fix what needs fixing and stick around to help.
Frequently asked questions
Can you testing my GPT Engineer-built Express app?
Yes. We regularly handle testing for Express projects built with GPT Engineer. We understand GPT Engineer's code patterns and the specific Express issues they introduce. Our review covers the full stack from frontend to backend.
What Express testing issues does GPT Engineer typically create?
Common testing issues in GPT Engineer-generated Express code include: no authentication system, direct database access from client, incomplete feature implementations. On the Express side, we often find: no helmet middleware for security headers, missing input validation and sanitization, unstructured error handling.
How much does testing cost for a GPT Engineer Express project?
Start with our $19 automated audit to get a prioritized list of issues. For hands-on testing work on GPT Engineer-built Express projects, we provide a fixed quote after reviewing the audit results. No surprises.
Related resources
Other Express Technologies
Other GPT Engineer Express Services
Get testing for your GPT Engineer Express app
Tell us about your project. We'll respond within 24 hours with a clear plan and fixed quote.