search_messages
Search message content across all channels
How to use it
search_messages is exposed by the Cross Claude MCP MCP server. Add the server to your MCP client (Claude Desktop, Cursor, Windsurf and others), and the search_messages tool becomes available to the model automatically. See the full listing for setup details and every tool this server provides.
FULL CROSS CLAUDE MCP LISTINGOther tools in Cross Claude MCP (12)
Read messages from a channel (supports polling via afterid)
Create a named channel (normalizes name, warns if similar channels exist)
Search for channels by keyword (matches names and descriptions)
Get all replies to a specific message
Retrieve shared data by key
List all channels with activity stats (message count, last activity, participants)
See who's registered
List all shared data keys with sizes and descriptions
Register this instance — response shows active channels and online instances, plus next steps
Post a message to a channel (check listchannels first — don't default to general)
Store large data (tables, plans, analysis) for other instances to retrieve by key
Poll until a reply arrives or timeout (used for async collaboration)