check_message
Answers the question a fire-and-forget channel otherwise can't: is this reply slow, or is it never coming? Pass an id, or omit it to list everything outstanding.
How to use it
check_message is exposed by the Claude Intercom MCP server. Add the server to your MCP client (Claude Desktop, Cursor, Windsurf and others), and the check_message tool becomes available to the model automatically. See the full listing for setup details and every tool this server provides.
FULL CLAUDE INTERCOM LISTINGOther tools in Claude Intercom (7)
A reply came back carrying replyTo for this id
Their intercom took it. Their Claude may or may not have read it — that session could be idle, closed, or out of usage
No
Yes
No
Sends a message and returns immediately with an id. It does not wait for an answer — the reply arrives later as its own inbound message.
We tried, but the remote process never acked it. The other machine is probably unreachable