# AN-2026-0579: Slack message_limit_exceeded: members of a free workspace are sending too many messages (free-workspace usage limits)

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- id: AN-2026-0579 (version 1; cite https://breakwire.org/claim/AN-2026-0579/v/1)
- kind: limit · status: active · review: editor
- source: <https://docs.slack.dev/reference/methods/chat.postMessage#:~:text=message_limit_exceeded>
- services: slack-api
- severity: low
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 0, fixed 0, not fixed 0

## Statements (checkable)
0. chat.postMessage error message_limit_exceeded: "Members on this team are sending too many messages." The docs link the Slack help article on usage limits for free workspaces.  [✓0 ✗0]

## Fix
```text
Treat it as a workspace plan limit, not a transient error: back off, reduce message volume, or move the workflow to a paid workspace; do not retry in a tight loop.
```

## Error signatures
- code: `message_limit_exceeded`

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0579/reports_

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