Set Slack channel topic
Input
topic requiredNew topic text, up to 250 characters (empty clears).
channel requiredChannel name/#name or id (C…).
workspaceDomain optionalWorkspace host, e.g. acme.slack.com. Defaults to the active workspace.
Output
ok requiredchannel requiredtopic optionalList Slack invoices
List Slack billing statements from the workspace's admin billing history. Returns workspace, total and invoices (date, statement, billId, amount, status, description, pdfUrl) — metadata only. Feed a row's pdfUrl (or billId) to slack.com/download_invoice to fetch that statement's PDF. Requires a workspace billing admin; defaults to the primary workspace, or pass workspaceDomain (e.g. acme.slack.com).
Slack login (Google SSO)
Log into a Slack workspace using Sign in with Google, then open that workspace. Handles Google's account chooser and consent along the way. Pass the workspace subdomain (e.g. "myteam" for myteam.slack.com) and optionally which Google account to use; your Google account must already have access to the workspace.
Send Slack message
Post a message to a channel or DM, identified by name ('social', '#social'), channel/DM id (C…/D…), or a user (@handle or U…) for a direct message. Pass threadTs to reply inside a thread (with broadcast to also send it to the channel). Returns the new message ts, channel id and permalink. Requires login.