io.github.oleksii-donets/simple_mcp

Demo 🚀

Is the io.github.oleksii-donets/simple_mcp MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-29.

A Test MCP server that provides tools, promts and resources

alive probed 2026-11-15 · unchanged since 2026-10-29

2tools

135tokens in Claude Opus 5.5

<0.1 %of Claude's 200k window

0.1×the median server

3.0 sto initialize

4 msto list tools

Run it: docker run -i --rm docker.io/d0nets/simple-mcp:0.0.4 (stdio, probed in a container with the network off)
Host: docker.io
Reports itself as: Demo 🚀 1.17.0
Capabilities: experimental, prompts, resources, tools
Instructions: none
Of a 1M window: <0.1 % of a 1M context window
Count: 135 tokens in Claude Opus 5.5, exact, measured 2026-10-29. With the Claude Code prefix mcp__…__ on each tool name: 157. The o200k_base estimate is 71. Counted again when the tool definitions change. Method.
Repository: https://github.com/oleksii-donets/simple_mcp
Registry: active, updated 2026-03-18 · registry entry

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.90×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
wait	76	40	56 %
random_float	59	31	44 %

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

Servers that mention simple.

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.