Module client 

Calling isb serve tools from the CLI over its unix socket.

One tools/call per connection, in MCP 2026-07-28: no initialize, and the version and capabilities ride in each request’s _meta.

Constants

LEGACY_VERSIONS

The revisions that open with initialize; an unknown version asked there is answered with the first.

MODERN_VERSIONS

The stateless revisions: version and capabilities in every request’s _meta, no initialize.

PROTOCOL_VERSIONS

The MCP protocol versions isb serve speaks, newest first.

Functions

call_tool

Call a tool and return its result. A tool that fails comes back as Error::Remote carrying the server-side error’s code and data; a protocol error (unknown tool, bad arguments) as Error::Invalid or Error::Protocol.

healthz

GET /healthz on a TCP address: the status and the decoded body.

list_tools

The tools the socket’s listener exposes, as tools/list describes them.