Are you affected by Slack's 1 req/min rate limit?

Slack throttled conversations.history and conversations.replies to 1 request/minute, 15 messages per request for non-Marketplace apps. New installs: May 29, 2025. Existing installs: March 3, 2026. Answer four questions to see if this hits you, and what to do about it.

1. What kind of Slack app are you running?

Listed on the Slack MarketplaceApproved through the Marketplace review process. Internal: only my own workspace uses it"Internal customer-built" in Slack's terms. Unlisted, but used by other workspacesYou distribute it to customers via Add-to-Slack but it's not in the Marketplace. I'm not sure

2. Which token are you using?

Bot token (xoxb-…)Most apps. User token (xoxp-…)Acts as a specific user. Different rate-limit class. Legacy/personal tokenAn admin or a user generated it manually.

3. Roughly how many messages do you need to pull?

Total across all channels in the backfill.

# of channels.

4. Over what date range?

Earliest date you need.

Latest date.

Are you affected by Slack's 1 req/min rate limit?

1. What kind of Slack app are you running?

2. Which token are you using?

3. Roughly how many messages do you need to pull?

4. Over what date range?

What to do