Open-source Prometheus MCP alternatives
The Prometheus MCP server is open source: you can read how it runs PromQL, discovers metrics, and inspects scrape targets before pointing an agent at your monitoring stack. The alternatives below publish their server source too, which lets you audit exactly what an agent can read from your telemetry.
These are the open-source observability servers people compare against Prometheus. Some run locally, some are hosted but ship their server code openly, and all let you read the repo before granting access.
The 8 best open-source alternatives
Grafana Labs' official server is open source and queries dashboards, Prometheus, Loki, incidents, alerts, and OnCall. You can read how it talks to Prometheus before wiring it in.
Set up Grafana →Sentry's official server is open source and pulls issues, stack traces, and events and runs Seer root-cause analysis. The repo shows exactly which error data an agent can reach.
Set up Sentry →Traces, logs, metrics, dashboards, and alerts come through the open-source SigNoz server in an OpenTelemetry-native stack. The auditable choice for all three signals at once.
Set up SigNoz →Incidents, services, schedules, teams, and orchestrations across 64 tools, read-only by default, sit in the open-source PagerDuty server. You can confirm its scope from the code.
Set up PagerDuty →- DatadogOfficial
Published source over a hosted endpoint defines the official Datadog server: search logs, query metrics, pull APM traces, inspect monitors, and investigate incidents. Broad coverage, auditable code.
Set up Datadog → - HoneycombOfficial
Honeycomb's official server is open source and queries traces, metrics, and logs, runs BubbleUp, and manages Boards, Triggers, and SLOs. The repo is there to read before granting access.
Set up Honeycomb → - New RelicOfficial
New Relic's official server publishes its source and runs NRQL, searches entities, analyzes golden metrics, and triages incidents over a hosted endpoint. Auditable, even though New Relic runs the backend.
Set up New Relic → AWS Labs' open-source server runs any AWS CLI command with validation, read-only mode, and command suggestions. Adjacent to observability: it reaches CloudWatch and infrastructure rather than a metrics query engine.
Set up AWS (AWS Labs) →
How to choose
Every option here ships server source you can read, which is the point when an agent can query your telemetry. Grafana is the closest companion to Prometheus, and SigNoz the most complete for metrics, logs, and traces. Datadog, Honeycomb, and New Relic are broad platforms with open server code; PagerDuty handles incidents and AWS reaches infrastructure. Read the repo before granting access.
FAQ
- Is the Prometheus MCP server open source?
- Yes. The maintained Prometheus server publishes its code, so you can read how it queries PromQL and pin the version you run. Every alternative on this page ships its server source too.
- Are open-source observability servers also self-hostable?
- Not always. Grafana, SigNoz, PagerDuty, and AWS run locally, but Datadog, Honeycomb, and New Relic publish their server source while running the backend as a hosted service. Open source and self-hostable are separate properties here.