Bolt
api
CORS Preflight Request Timeout - OPTIONS Request Failing
POST or other non-simple requests fail because the CORS preflight OPTIONS request times out. Browser doesn't even send the actual request.
Requests work in some browsers but not others, or fail intermittently.
Error Messages You Might See
OPTIONS request timeout
Preflight request failed
No 'Access-Control-Allow-Methods' header
CORS preflight failed
Common Causes
- Server doesn't handle OPTIONS method
- OPTIONS request takes too long to respond
- Firewall blocking OPTIONS method
- CORS headers missing in OPTIONS response
- Preflight cache too short, requesting too frequently
How to Fix It
Ensure server responds to OPTIONS: if(request.method === 'OPTIONS') return new Response(null, { status: 200, headers: corsHeaders })
Response must include CORS headers: 'Access-Control-Allow-Methods', 'Access-Control-Allow-Headers', 'Access-Control-Max-Age'
Set long max-age: 'Access-Control-Max-Age': '86400' (24 hours)
Use middleware to add CORS to all routes
Real developers can help you.
hanson1014
Full-stack developer experienced in fixing and deploying AI-generated apps from Lovable, Bolt.new, Cursor, and Replit. I specialize in debugging Supabase integration issues (auth flows, RLS policies, database connections), fixing broken deployments, resolving routing/blank screen problems, and cleaning up messy React/Vite codebases. I also build production apps with the Claude API and have shipped a Mac desktop dev tool (Nexterm from scratch. Based in Hong Kong, fast turnaround.
Anthony Akpan
Developer with 8 years of experience building softwares fro startups
David Olverson
Solo dev shipping production apps with AI-assisted development. I specialize in rescuing broken Lovable/Bolt/Cursor builds and taking them to production. 10+ apps shipped including SaaS CRMs, gaming platforms, real estate tools, and Discord bots. Stack: Next.js 16, TypeScript, Tailwind CSS, FastAPI, PostgreSQL, Prisma. I use Claude Code with 50+ custom skills for rapid delivery. Average turnaround: 2-4 weeks from broken prototype to production.
Costea Adrian
Embedded Engineer specilizing in perception systems. Latest project was a adas camera calibration system.
Rudra Bhikadiya
I build and fix web apps across Next.js, Node.js, and DBs.
Comfortable jumping into messy code, broken APIs, and mysterious bugs.
If your project works in theory but not in reality, I help close that gap.
Jen Jacobsen
I’m a Full-Stack Developer with over 10 years of experience building modern web and mobile applications. I enjoy working across the full product lifecycle — turning ideas into real, well-built products that are intuitive for users and scalable for businesses.
I particularly enjoy building mobile apps, modern web platforms, and solving complex technical problems in a way that keeps systems clean, reliable, and easy to maintain.
Vlad Temian
15+ years shipping production infrastructure for startups. Former CTO at qed.builders (acquired by The Sandbox).
Cursor ambassador and agentic tooling builder.
I've scaled systems, automated deployments, and built observability tools for AI coding workflows. I specialize in taking vibe-coded apps from broken prototype to production-ready: fixing Supabase auth/RLS, Stripe integrations, deployment pipelines, and cleaning up AI-generated spaghetti.
I build tools in this space (agentprobe, claudebin, micode) and understand both sides: how AI generates code and why it breaks.
https://blog.vtemian.com/
Kingsley Omage
Fullstack software engineer passionate about AI Agents, blockchain, LLMs.
Tejas Chokhawala
Full-stack engineer with 5 years experience building production web apps using React, Next.js and TypeScript.
Focused on performance, clean architecture and shipping fast.
Experienced with Supabase/Postgres backends, Stripe billing, and building AI-assisted developer tools.
Alvin Voo
I’ve watched the tech landscape evolve over the last decade—from the structured days of Java Server Pages to the current "wild west" of Agentic-driven development. While AI can "vibe" a frontend into existence, I specialize in the architecture that keeps it from collapsing.
My expertise lies in the critical backend infrastructure: the parts that must be fast, secure, and scalable. I thrive on high-pressure environments, such as when I had only three weeks to architect and launch an Ethereum redemption system with minimal prior crypto knowledge, turning it into a major revenue stream.
What I bring to your project:
Forensic Debugging: I don't just "patch" bugs; I use tools like Datadog and Explain Analyzers to map out bottlenecks and resolve root causes—like significantly reducing memory usage by optimizing complex DB joins.
Full-Stack Context: Deep experience in Node.js and React, ensuring backends play perfectly with mobile and web teams.
Sanity in the Age of AI: I bridge the gap between "best practices" and modern speed, ensuring your project isn't just built fast, but built to last.
You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
What is preflight?
Browser sends OPTIONS request to check if server allows cross-origin request. Server responds with allowed methods/headers
How long should preflight cache?
Access-Control-Max-Age: 86400 (24 hours). Longer is better - fewer OPTIONS requests
Which requests need preflight?
Non-simple: PUT, DELETE, POST with custom headers. Simple: GET, HEAD, POST with form-data