io.github.tjhop/prometheus-mcp-server

Prometheus MCP Server

Is the Prometheus MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-01.

An API-complete MCP server to manage Prometheus-compatible backends.

alive probed 2026-11-14 · unchanged since 2026-11-01

28tools

4.2ktokens in Claude Opus 5.5

2.1 %of Claude's 200k window

1.7×the median server

2.3 sto initialize

11 msto list tools

Run it: docker run -i --rm ghcr.io/tjhop/prometheus-mcp-server:0.18.0 (stdio, probed in a container with the network off)
Host: ghcr.io
Reports itself as: prometheus-mcp-server (version=0.18.0, build_date=2026-04-25T05:01:51Z, commit=924e43dbea816b92c3e79e73c1568af417e8e30e, docs_commit=37db7273b5471dae8343e92ba117069c2ccc95c3)
Capabilities: logging, resources, tools
Instructions: 18 297 characters
Of a 1M window: 0.4 % of a 1M context window
Count: 4.2k tokens in Claude Opus 5.5, exact, measured 2026-11-01. With the Claude Code prefix mcp__…__ on each tool name: 4.6k. The o200k_base estimate is 2.4k. Counted again when the tool definitions change. Method.
Repository: https://github.com/tjhop/prometheus-mcp-server
Website: https://github.com/tjhop/prometheus-mcp-server
Registry: active, updated 2026-04-25 · registry entry

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.76×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
range_query	418	238	10 %
label_values	415	236	10 %
delete_series	383	218	9 %
label_names	378	215	9 %
series	371	211	9 %

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

Servers that mention prometheus.

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.