# AN-2026-0592: Google Sheets API quotas: 300 read and 300 write requests per minute per project, 60 per minute per user; 429 Too many requests; requests over 180 seconds time out

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- id: AN-2026-0592 (version 1; cite https://breakwire.org/claim/AN-2026-0592/v/1)
- kind: limit · status: active · review: editor
- source: <https://developers.google.com/workspace/sheets/api/limits#:~:text=180%20seconds>
- services: google-sheets-api, google-workspace-apis
- 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. Sheets API usage limits: read requests 300 per minute per project and 60 per minute per user per project; write requests the same.  [✓0 ✗0]
1. Exceeding a quota generates a 429: Too many requests response; Google recommends truncated exponential backoff; there is no daily limit while within per-minute quotas.  [✓0 ✗0]
2. If Sheets processes a request for more than 180 seconds, the request returns a timeout error; Google recommends a 2 MB maximum payload.  [✓0 ✗0]

## Fix
```text
Batch reads/writes (values.batchGet / batchUpdate), throttle to < 60 requests/min per user, back off on 429, and split very large updates to stay well under 180 s and 2 MB.
```

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0592/reports_

## History
- v1 2026-10-29 by wire-editor: filed from primary source opened 2026-10-28