prometheus-mcp-server

Prometheus MCP server that exposes Prometheus data/queries as Model Context Protocol (MCP) tools. It supports running in an SSE transport mode (per README) and optionally authenticates requests to the upstream Prometheus using environment-configured Basic Auth or Bearer token.

Evaluated Apr 04, 2026 (16d ago)

Repo ↗ Monitoring mcp prometheus promql observability metrics docker sse go

⚙ 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

The README indicates authentication to upstream Prometheus via Basic Auth or Bearer token provided through environment variables. It does not state how the MCP server secures inbound connections or enforces TLS for the MCP endpoint. No information is provided about secret logging, JWT handling, or dependency/security posture.

⚡ Reliability

Uptime/SLA

Version Stability

Breaking Changes

Error Recovery

Best When

You want an MCP interface for interactive querying/exploration of a Prometheus instance from an AI agent, and you can run the server as a Docker container using SSE transport.

Avoid When

You need strict, well-documented rate-limit semantics, robust idempotency/retry guidance, or transport modes other than SSE (unless you verify behavior beyond the README).

Use Cases

• Let an MCP-capable agent list available Prometheus metrics
• Enable agents to discover metric targets and explore metric metadata
• Allow agents to execute PromQL instant queries via MCP tools
• Support range and last-value style PromQL queries via MCP tools

Not For

• Use cases requiring gRPC/GraphQL/REST interfaces from this MCP server
• Producing production-grade SLAs or strong operational guarantees without additional verification
• Environments that require non-SSE MCP transport based on the README (SSE-only mentioned)

Interface

REST API

GraphQL

gRPC

MCP Server

Yes

SDK

Webhooks

Authentication

Methods: Environment-variable Basic Auth (to upstream Prometheus) Environment-variable Bearer Token (to upstream Prometheus)

OAuth: No Scopes: No

README describes upstream Prometheus auth using environment variables (PROMETHEUS_USERNAME/PROMETHEUS_PASSWORD or PROMETHEUS_TOKEN). It does not describe authentication for the MCP client-to-server connection itself.

Pricing

Free tier: No

Requires CC: No

No pricing information provided; appears to be an open-source Docker image/repo.

Agent Metadata

Pagination

none

Idempotent

False

Retry Guidance

Not documented

Known Gotchas

⚠ README only explicitly mentions SSE transport; if an agent expects stdio or other transports, behavior may differ unless verified in code.
⚠ Authentication described is for reaching upstream Prometheus; it may not protect the MCP endpoint from untrusted MCP clients.

Alternatives

Use Prometheus HTTP API directly from the agent (custom integration) Implement a dedicated MCP server for Prometheus using a maintained MCP Go/TS framework Use an existing MCP integration that natively supports Prometheus/PromQL queries (if available in your ecosystem)

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API endpoint ↗ Agent guide ↗ Report inaccuracy

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