You will get a fixed Vercel API route bug fix
Project details
I will fix one focused Vercel API route or serverless function issue in an existing Next.js, JavaScript, TypeScript, or Python project. Typical problems are 404 or 405 responses, wrong route placement, failed fetch calls, deployment/runtime mismatches, or serverless config issues. I work from your repo or minimal reproduction, keep the change scoped, and return a short handover with root cause, changed files, and verification steps. This project covers one clearly reproducible issue, not a full app rebuild or feature rewrite.
Programming Languages
JavaScript, Python, TypeScriptWhat's included $75
These options are included with the project scope.
$75
- Delivery Time 2 days
- Number of Revisions 0
- Bug Investigation
- Fix Documentation
Frequently asked questions
About Sebastian
AI-Built App Broken? I Fix & Ship Next.js / Supabase / Vercel Apps
Sindelfingen, Germany - 3:13 am local time
That's exactly what I fix. I take broken or half-finished AI-built React/Next.js + Supabase apps and get them working again - scoped and fast, without rewriting your whole project.
What's different: every fix ships verified, not "should work." I reproduce your exact bug first, fix it, then prove it's gone - the failing case passes, the app still builds and runs, nothing else broke. You get a short plain-language handover: what was wrong, what I changed, and how it was verified. No black box.
Good fits: a broken or failing route, auth/login issues, Supabase or database errors, a failed Vercel deploy, a webhook or API call that doesn't work, a repetitive task that should be a script.
To start I need: repo access (GitHub), what should happen, the current error or a screenshot, and how to run it. I keep access minimal and never touch payments, secrets, or customer data beyond what the fix needs.
Steps for completing your project
After purchasing the project, send requirements so Sebastian can start the project.
Delivery time starts when Sebastian receives requirements from you.
Sebastian works on your project following the steps below.
Revisions may occur after the delivery date.
Diagnose failing endpoint
Review the repo or reproduction, failing route, logs, deployment URL, and expected behavior.
Apply focused fix
Fix the API route, serverless function config, or fetch/runtime mismatch causing the issue.