Vercel·Fixdeployintermediate

Vercel Function Timing Out

Quick Answer

Vercel free tier has a 10-second function timeout. Long-running operations hit this limit. Start with "Optimize or move long operations" before making broader code changes.

You're in the right place if...

!504 Gateway Timeout
!API routes return timeout error
!Functions work locally but timeout on Vercel

Why this happens

Vercel free tier has a 10-second function timeout. Long-running operations hit this limit.

Fix

Optimize or move long operations

Solutions by priority:

1. Move long operations to background jobs
2. Use streaming responses instead of waiting
3. Switch to Railway for long-running processes
4. Add vercel.json to increase timeout (Pro only):
{
  "functions": {
    "api/long-task.ts": {
      "maxDuration": 60
    }
  }
}

Prevent this next time

Design API routes to complete in under 10 seconds. Use streaming for AI responses. Use queues for heavy processing.