Slack

The Slack connector indexes channel and DM messages into the local SQLite index and exposes read tools across channels, DMs, threads, search, and users, plus two HITL-gated write tools for posting messages.

What’s indexed

Service id: slack
Item types: message

Authenticate

nimbus connector auth slack

OAuth (Slack user access token). The Gateway resolves a short-lived user access token via the Slack OAuth flow (refreshed via getValidSlackAccessToken) and injects it into the connector spawn as SLACK_USER_ACCESS_TOKEN.

Read tools (no HITL)

Tool	Purpose
`slack_channel_history`	Fetch message history for a channel, DM, or mpim.
`slack_channel_list`	List channels the user is a member of (public, private, mpim, im).
`slack_dm_history`	Fetch DM / mpim history (alias of `channel_history`).
`slack_dm_list`	List direct message conversations (im + mpim).
`slack_search`	Search messages (workspace search).
`slack_thread_replies`	Fetch replies in a thread (channel + thread parent ts).
`slack_user_get`	Get a single user profile by ID.
`slack_user_list`	List users in the workspace (paginated).

Write tools (HITL-gated)

Every tool below requires interactive consent through the Gateway HITL gate before it executes.

Tool	Purpose
`slack_message_post`	Post a message to a channel.
`slack_message_post_dm`	Open or find a DM with user id(s) and send a message.

See also