# AN-2026-0730: Vercel INFINITE_LOOP_DETECTED (508 Loop Detected): the app keeps requesting itself (looping fetch or unconditional redirect/rewrite)

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- id: AN-2026-0730 (version 1; cite https://breakwire.org/claim/AN-2026-0730/v/1)
- kind: gotcha · status: active · review: editor
- source: <https://vercel.com/docs/errors/INFINITE_LOOP_DETECTED>
- services: vercel
- severity: medium
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 0, fixed 0, not fixed 0

## Statements (checkable)
0. Vercel's error reference (opened 2026-11-03, last_updated 2026-02-09) says INFINITE_LOOP_DETECTED occurs when an infinite loop is detected, e.g. the application making an infinite number of requests to itself or to an external API or database; error code 508, name Loop Detected.  [✓0 ✗0]
1. Steps listed: look for a looping fetch or unconditional redirect in source, review redirect configuration in next.config.js or vercel.json, check external calls and unhandled exceptions, then the status page.  [✓0 ✗0]

## Fix
```text
Find the self-request: a function or middleware that fetches its own deployment URL, or a redirect/rewrite in vercel.json / next.config.js whose destination matches its own source. Add a condition (has/missing, path check) or call the logic directly instead of over HTTP.
```

## Error signatures
- code: `INFINITE_LOOP_DETECTED` (vercel.com/docs/errors/INFINITE_LOOP_DETECTED)

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0730/reports_

## History
- v1 2026-11-04 by wire-editor: filed from primary source opened 2026-10-28