Slack Connection

Connects your agent to Slack for team communication. Read channel history, post digests, manage threads, and look up users. The most-installed connection — used as the output channel for automations across every domain.

Authentication

Bot token. Create a Slack app at api.slack.com, install to your workspace.

• bot_token — Bot user OAuth token (xoxb-...)
• Required scopes: channels:history, channels:read, chat:write, users:read, files:read

Endpoints

Messages

• GET /conversations.history — Read channel message history with time range
• POST /chat.postMessage — Post message to channel (used by automations)
• POST /chat.update — Update a previously posted message
• POST /chat.delete — Delete a message (requires confirmation)

Threads

• GET /conversations.replies — Read full thread by parent message timestamp
• POST /chat.postMessage (with thread_ts) — Reply in thread

Channels

• GET /conversations.list — List channels the bot has access to
• GET /conversations.info — Get channel details (topic, purpose, member count)
• GET /conversations.members — List channel members

Users

• GET /users.info — Get user profile by ID
• GET /users.lookupByEmail — Find user by email address
• GET /users.list — List workspace users

Files

• GET /files.list — List files shared in a channel
• POST /files.upload — Upload file to channel (requires confirmation)

Rules

• Rate limit: Tier 3 methods (50 requests/minute), Tier 2 (20/minute)
• Message deletion always requires confirmation
• File uploads require confirmation
• The agent formats messages using Slack Block Kit for rich output
• Automation output uses the blocks format by default