FastAPI app built with Replit Agent? Let’s review it.
Expert code review for FastAPI apps built with Replit Agent. We find Replit Agent-specific bugs, fix FastAPI security issues, and optimize performance. From $19.
Replit Agent issues we find in FastAPI projects
Problems specific to Replit Agent's code generation patterns when building FastAPI apps.
Secrets stored in Replit environment
API keys and credentials stored in Replit's secrets manager don't transfer when you export the project. Developers often hardcode them as a workaround, creating security risks.
No HTTPS or security headers
Replit's development environment doesn't enforce HTTPS or set security headers. Apps deployed without proper configuration are vulnerable to man-in-the-middle attacks.
Database connection instability
Replit's hosted databases can disconnect unexpectedly. Without connection pooling and retry logic, apps crash or lose data during these interruptions.
File system assumptions
Replit Agent sometimes writes to the file system assuming persistent storage, which breaks on containerized or serverless deployments.
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 Replit Agent 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 Replit Agent?
Yes. We regularly audit FastAPI projects built with Replit Agent and understand the specific patterns and issues it introduces. Our review covers security, performance, and deployment readiness.
What FastAPI issues does Replit Agent typically create?
Common issues in Replit Agent-generated FastAPI code include: secrets stored in replit environment, no https or security headers, database connection instability. Combined with FastAPI-specific concerns like blocking calls inside async endpoints and missing authentication on endpoints.
How do I make my Replit Agent FastAPI project production-ready?
Start with our code audit ($19) to get a prioritized list of issues. For Replit Agent-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 Replit Agent-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 Replit Agent FastAPI project?
Tell us about your project. We'll respond within 24 hours with a clear plan and fixed quote.