Prometheus Safe MCP
Executes constrained, read-only Prometheus queries for instant metrics, active alerts, and target health, with bounded resource usage and audit records.
README
Prometheus Safe MCP
A focused, read-only MCP server for bounded Prometheus instant queries, active alerts, and target health. Alpha: tests use synthetic HTTP responses; compatibility with a live Prometheus release is not certified.
Install and run
Requires Python 3.11+ and uv.
uv sync --extra test
export PROMETHEUS_SAFE_URL=https://prometheus.example.invalid
uv run prometheus-safe-mcp
The process speaks MCP over stdio. It does not load .env; .env.example is documentation only. Configure the URL of a read-only, network-restricted Prometheus endpoint.
Safety
All tools use HTTP GET. Query length, HTTP duration/bytes, and returned target count are bounded. Configuration rejects URL credentials, queries, fragments, and non-HTTP schemes. Audit records contain operation categories rather than PromQL text or response bodies. This does not replace upstream authentication, authorization, or egress policy. See security design.
Verify
uv run --extra test pytest
uv run python -m compileall -q src tests
uv build
MIT © 2026 Ben Gauger.
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