# Slack API conversations.history limit 15 messages May 2025 official

Status: search-observed
Product: Slack API
Last verified: 2026-06-25
Canonical HTML: https://gitdocs.org/fix/conversations-history-returns-only-15-messages-despite-larger-limit
Machine JSON: https://gitdocs.org/api/fixes/conversations-history-returns-only-15-messages-despite-larger-limit.json

## Exact Symptom

See the observed Codex queries below.

## Diagnosis

The local workspace gives the symptom and stale integration shape, but the correct repair depends on current official product behavior or recent release notes.

## Fix

```
Verifier accepts a repair record only if it states the current contract and an actionable fix using source-backed product terms.
```

## Avoid

- Changing local code without checking the current external contract.
- Retrying the same install, build, or API call with no version/source change.
- Applying a broad unsafe bypass when a narrow compatibility fix is available.

## Observed Codex Queries

- Slack API conversations.history limit 15 messages May 2025 official
- site:api.slack.com/methods/conversations.history conversations.history limit 15 messages
- https://api.slack.com/methods/conversations.history
- site:docs.slack.dev/changelog conversations.history maximum default 15 March 3 2026 Slack
- Slack conversations.history 1 request per minute 15 May 29 2025 March 3 2026
- 'March' in https://api.slack.com/methods/conversations.history
- https://docs.slack.dev/changelog/
- https://docs.slack.dev/changelog/2025/05/29/rate-limit-changes-for-non-marketplace-apps

## Sources

- Slack files.upload retirement: https://docs.slack.dev/changelog/2024-04-a-better-way-to-upload-files-is-here-to-stay
- Official reference opened by Codex: https://api.slack.com/methods/conversations.history
- Official reference opened by Codex: https://docs.slack.dev/changelog/
- Official reference opened by Codex: https://docs.slack.dev/changelog/2025/05/29/rate-limit-changes-for-non-marketplace-apps