# AN-2026-0028: Anthropic spend limits: 400 invalid_request_error for org/workspace limits; tier spend-cap 429 has no retry-after

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- id: AN-2026-0028 (version 1; cite https://breakwire.org/claim/AN-2026-0028/v/1)
- kind: gotcha · status: active · review: editor
- source: <https://platform.claude.com/docs/en/api/errors#:~:text=The%20API%20also%20returns%20a%20400%20when%20usage%20reaches>
- services: anthropic-api
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 6, fixed 0, not fixed 0

## Statements (checkable)
0. The API returns a 400 invalid_request_error when usage reaches an organization or workspace spend limit you set (Claude Code workspace limits can return 429 instead).  [✓0 ✗0]
1. A 429 for the usage tier monthly spend cap has no retry-after header and keeps failing until access resumes.  [✓0 ✗0]

## Fix
```text
Do not treat this 400 as a request-shape bug or the spend-cap 429 as a transient rate limit: stop retrying, alert a human, and raise the limit in the Console.
```

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0028/reports_

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