القائمة
Connect to a Model Context Protocol (MCP) server, perform the handshake, discover its tools, and invoke them over JSON-RPC.
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استنادا إلى تصنيف SOC المهني
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| name | mcp-client |
| description | Connect to a Model Context Protocol (MCP) server, perform the handshake, discover its tools, and invoke them over JSON-RPC. |
| version | 0.1.0 |
Your gateway to MCP servers. Use this to reach capabilities exposed by an MCP server — listing the tools it offers and calling them — without hand-rolling the protocol each time.
The helper at scripts/mcp_stdio.py speaks the stdio transport (the server
is a subprocess; messages are newline-delimited JSON-RPC 2.0 over its
stdin/stdout). It is stdlib-only. For HTTP/SSE-transport servers, use the
official mcp Python SDK instead (pip install mcp) — the call flow below is
the same.
MCP is JSON-RPC 2.0. The minimum useful session is:
initialize — send your client info and protocolVersion; the server
replies with its capabilities and server info. This is the handshake; it must
come first.notifications/initialized — send this notification (no id, no reply)
to tell the server the handshake is complete. Skipping it leaves some servers
in a half-open state.tools/list — get the catalogue of tools. Each tool has a name, a
description, and an inputSchema (JSON Schema for its arguments). Read the
schema before calling — it tells you the required arguments.tools/call — invoke a tool by name with an arguments object that
satisfies its inputSchema. The result comes back as a content array
(text/image/resource blocks); check the isError flag.Requests carry a unique integer id and expect a matching response; match
replies to requests by id. Notifications omit id.
# List the tools a server exposes (server launched as a subprocess)
python scripts/mcp_stdio.py --server "uvx mcp-server-time" list-tools
# Call a tool with JSON arguments
python scripts/mcp_stdio.py --server "uvx mcp-server-time" \
call get_current_time --args '{"timezone": "UTC"}'
--server is the shell command that starts the MCP server on stdio. The helper
runs the full initialize -> initialized -> request sequence for you and
prints the JSON result.
initialize first and notifications/initialized second — tool
calls before the handshake completes will be rejected.arguments against the tool's inputSchema; a schema mismatch
is the most common failure.isError and the content blocks
before acting on them.