mcp-server-prometheus

Provides an MCP server that fronts a Prometheus instance so an MCP-capable client (e.g., Cursor) can query Prometheus for metrics, labels, targets, rules, and alert information using an API key for access control.

Evaluated Apr 04, 2026 (16d ago)

Repo ↗ Monitoring mcp prometheus monitoring observability go ai-tools

⚙ Agent Friendliness

/ 100

Can an agent use this?

🔒 Security

/ 100

Is it safe for agents?

⚡ Reliability

/ 100

Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality

Documentation

Error Messages

Auth Simplicity

Rate Limits

🔒 Security

TLS Enforcement

Auth Strength

Scope Granularity

Dep. Hygiene

Secret Handling

README mentions API key protection and passing the key via X-API-Key, but does not specify TLS requirements, key storage/rotation practices, or fine-grained scopes/authorization. It also suggests generating an API key and printing it to stdout, which can be risky if logs are accessible.

⚡ Reliability

Uptime/SLA

Version Stability

Breaking Changes

Error Recovery

Best When

You have a Prometheus endpoint you can access and you want a lightweight local MCP bridge for interactive monitoring queries in a developer workflow.

Avoid When

You cannot ensure secure transport (TLS) and safe secret handling for the MCP server or you require strong, enterprise-grade auth/authorization and auditing.

Use Cases

• Query Prometheus metrics interactively from an AI-enabled editor via MCP
• Investigate system status and trends over time
• Browse Prometheus labels, scrape targets, recording/alerting rules, and alert states
• Reduce time to formulate PromQL queries for common operational questions

Not For

• High-security production environments without verifying the server’s auth/TLS behavior and threat model
• Use cases requiring fine-grained authorization policies beyond a single API key
• Large-scale or latency-sensitive querying without load testing and rate-limit configuration

Interface

REST API

GraphQL

gRPC

MCP Server

Yes

SDK

Webhooks

Authentication

Methods: API key (X-API-Key header) for MCP server

OAuth: No Scopes: No

README indicates the MCP server can generate or accept an API key and expects clients to pass it via the X-API-Key header in Cursor MCP server configuration.

Pricing

Free tier: No

Requires CC: No

Open-source (MIT) local server; no hosted pricing described.

Agent Metadata

Pagination

none

Idempotent

False

Retry Guidance

Not documented

Known Gotchas

⚠ MCP client configuration must correctly supply the MCP server URL and X-API-Key header; otherwise queries fail (e.g., 'unauthorized' per README).
⚠ Prometheus connectivity issues will surface as 'connection refused' style errors; agents may need to ensure network access/DNS/ports are correct.

Alternatives

Prometheus HTTP API + an MCP/agent wrapper you control Grafana (with data source permissions) and automation via its APIs Custom MCP tools that call Prometheus query_range/query/alerts endpoints directly Direct PromQL usage with IDE plugins or dashboards

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API endpoint ↗ Agent guide ↗ Report inaccuracy

Scores are editorial opinions as of 2026-04-04.