FastAPI app built with Cursor? Let’s review it.
Expert code review for FastAPI apps built with Cursor. We find Cursor-specific bugs, fix FastAPI security issues, and optimize performance. From $19.
Cursor issues we find in FastAPI projects
Problems specific to Cursor's code generation patterns when building FastAPI apps.
Exposed API keys in client code
Cursor often places sensitive keys and secrets directly in client-side components or .env files without the NEXT_PUBLIC prefix distinction, making them accessible in the browser.
Missing input validation on API routes
Server actions and API routes generated by Cursor frequently accept user input without sanitization or schema validation, opening the door to injection attacks.
Unhandled async errors
Cursor wraps code in try/catch inconsistently. Failed API calls, database queries, and file operations often crash the app silently or show raw error messages to users.
Race conditions in state management
Multiple rapid state updates or concurrent API calls cause stale data, UI flickers, and inconsistent behavior — especially in forms and real-time features.
FastAPI issues we check for
Common FastAPI problems that affect production readiness.
Blocking calls inside async endpoints
Synchronous database calls, file operations, or HTTP requests inside async def endpoints block the entire event loop, making your API unresponsive under load.
Missing authentication on endpoints
API routes that handle sensitive data or actions without any auth middleware — Depends() for authentication is simply not included in the route definition.
No CORS configuration
CORSMiddleware either missing (blocking all cross-origin requests) or set to allow_origins=['*'] (allowing any website to call your API).
Pydantic models without validation constraints
Request models that accept any string length, any number range, and any format. No Field() constraints, so invalid data flows through your system.
Start with a self-serve audit
Get a professional review of your Cursor FastAPI 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.
Frequently asked questions
Can you review FastAPI code generated by Cursor?
Yes. We regularly audit FastAPI projects built with Cursor and understand the specific patterns and issues it introduces. Our review covers security, performance, and deployment readiness.
What FastAPI issues does Cursor typically create?
Common issues in Cursor-generated FastAPI code include: exposed api keys in client code, missing input validation on api routes, unhandled async errors. Combined with FastAPI-specific concerns like blocking calls inside async endpoints and missing authentication on endpoints.
How do I make my Cursor FastAPI project production-ready?
Start with our code audit ($19) to get a prioritized list of issues. For Cursor-built FastAPI projects, the typical path is: fix security gaps, address FastAPI-specific performance issues, then configure deployment. We provide a fixed quote after the audit.
How much does it cost to review Cursor-generated FastAPI code?
Our code audit starts at $19 and covers security, performance, architecture, and deployment readiness. For fixes, our Fix & Ship plan is $199. Larger projects get a custom fixed quote — no hourly billing or surprises.
Related resources
Need help with your Cursor FastAPI project?
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