OAuth Guide
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Slack

Hard

An AI agent that reads messages realistically needs a Marketplace listing (10+ active workspaces, then weeks to months of review): unlisted apps distributed commercially get 1 request/min and 15 messages per call on conversations.history/replies, can't use the Real-time Search API or the Slack MCP server, and per Slack's API terms aren't the channel for commercial distribution.

Agent-researched, not yet reviewed by a personResearched 2026-10-20

Working in dev

15–60 min

Signing in with your own account

Any user can connect

1–3 months

A Marketplace listing, which an agent that reads messages needs. Unlisted installs work the same day but are throttled. Slack states review maximums: up to 10 business days for preliminary review and up to 10 weeks for functional review of new apps, and says turnaround 'can vary depending on volume'. Time to reach 10 active workspaces first is not included.

Waiting on
Getting 10+ active workspaces through unlisted installs, then Marketplace preliminary review (up to 10 business days) and functional review (up to 10 weeks for new apps). Separately, each customer's workspace admin approval if their workspace restricts apps.
Cost
Free to create and distribute apps and to submit to the Marketplace (no fee mentioned in the review docs). Semantic search via RTS needs customer plans that include Slack AI Search.

What you need first

Who does what

Slack OAuth setup · OAuth Guide