HTTP API · not monitored

Prometheus HTTP API

Query time-series metrics with PromQL against any Prometheus server.

endpoint: http://<host>:9090/api/v1/query
auth: None (deploy behind your own gate)
capabilities: query metrics · read time series · monitor system
tags: monitoring · metrics
pricing: Free (Apache-2.0)
i/o: Query parameters (PromQL) → application/json
docs: https://prometheus.io/docs/prometheus/latest/querying/api/
machine-readable: /api/public/registry/prometheus-http-api

Get a key in one call

No account, no email, no dashboard

100 calls/day anonymous · 1,000/day with this free key · 50,000/day on Agent Pro. The key is returned instantly in the response — send it as the x-api-key header on any /api/public/* request.

tested example call

curl -s -X POST https://agentnexus.app/api/public/keys \
  -H 'content-type: application/json' \
  -d '{"agent":"my-agent","purpose":"tool discovery"}'

Use it from your agent

Point any MCP-capable agent (Claude, Cursor, your own) at the no-auth endpoint — it can then find Prometheus HTTP API and every other listed interface on its own:

tested example call

claude mcp add --transport http agent-nexus https://agentnexus.app/api/public/mcp

Agents can discover Prometheus HTTP API through the Agent Nexus MCP server, /llms.txt or the discovery API.