io.github.qso-graph/jt-mcp

jt-mcp

Is the io.github.qso-graph/jt-mcp MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-14.

WSJT-X over UDP for AI apps: status, decodes, who is calling CQ, stations heard, WSPR. Read-only.

alive probed 2026-11-14

7tools

1.8ktokens in Claude Opus 5.5

0.9 %of Claude's 200k window

0.7×the median server

2.3 sto initialize

403 msto list tools

Run it: uvx jt-mcp@0.2.2 (stdio, probed in a container with the network off)
Host: pypi.org
Reports itself as: jt-mcp 0.2.2
Capabilities: logging, prompts, resources, tools
Instructions: 429 characters
Of a 1M window: 0.2 % of a 1M context window
Count: 1.8k tokens in Claude Opus 5.5, exact, measured 2026-10-30. With the Claude Code prefix mcp__…__ on each tool name: 1.9k. The o200k_base estimate is 1.1k. Counted again when the tool definitions change. Method.
Repository: https://github.com/qso-graph/jt-mcp
Registry: active, updated 2026-11-14 · registry entry

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.67×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
jt_decodes	460	275	25 %
jt_cq	448	268	25 %
jt_heard	276	165	15 %
jt_wspr	271	162	15 %
jt_status	199	119	11 %

Other registry entries on pypi.org, the ones next to this name; all of them.

Servers that mention graph.

The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.

Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.