Sentry Server

Forked from elad12390/loki-mcp — retargeted from Grafana Loki to Sentry. Same "few sharp tools, no config" ergonomics, new backend. This repo keeps the original's git history.

An MCP server to easily search and analyze Sentry issues, events, and traces — without writing Sentry queries or clicking through the UI.

This is a focused, fast alternative to the official Sentry MCP: a small, predictable tool set modeled on a battle-tested log-search MCP, talking directly to the Sentry REST API.

Quick Start

You can run this server directly using npx:

export SENTRY_AUTH_TOKEN="sntryu_..."      # Sentry auth token (see Configuration)
export SENTRY_URL="https://us.sentry.io"   # your region/host (default: https://sentry.io)
export SENTRY_ORG="my-org"                  # optional; auto-detected if omitted

npx @elad12390/sentry-mcp

Features

This MCP server provides 4 tools, 3 resources, and 3 prompts. AI assistants automatically understand when to use each based on natural language.

Tools

🔍 sentry_search_issues — Your primary search tool

• Just say: "check sentry", "what's breaking", "show me errors", "unresolved issues", "top errors", "how many errors"
• Searches grouped issues across ALL projects automatically (or filter by project)
• Uses Sentry search syntax in query (is:unresolved level:error, release:latest, free text)
• Set count=true for event counts + an ASCII trend chart instead of the issue list

🔗 sentry_trace_lookup — Distributed tracing

• Just say: "follow this trace", "what happened in this request", "trace this id across services"
• Returns every span and error in a trace, grouped by service, as a timeline

🔎 sentry_get_issue_details — Root cause analysis

• Just say: "show the stack trace", "what happened before this error", "why did this fail"
• Returns the exception + stack trace, the breadcrumbs (what happened right before), request context, tags, and the trace ID

🧩 sentry_pattern_analysis — Group & rank error patterns

• Just say: "group similar errors", "what error types", "do we have one problem or many"
• Ranks issue groups by event volume and merges near-duplicate titles into higher-level patterns

Resources (Read-only Data)

sentry://projects — List all projects in the org

• Read this first to know what you can filter by

sentry://tags — List all tag keys (searchable metadata)

• Shows what you can filter by (environment, release, browser, etc.)

sentry://tags/{key}/values — Get values for a specific tag

• Example: sentry://tags/environment/values

Prompts (Guided Workflows)

debug-error — Search the issue, pull stack trace + breadcrumbs, gauge blast radius

• Arguments: error_text (required), project, time_window

trace-request — Follow a trace ID across services

• Arguments: trace_id (required), time_window

health-check — List projects, count errors + trend, find dominant patterns

• Arguments: project, time_window

Usage Tips for AI Assistants

When the user says "check sentry" or "what's broken", you should:

1. Read sentry://projects if you don't know what projects exist
2. Use sentry_search_issues as your primary tool — it works across all projects
3. Follow up with sentry_get_issue_details on an interesting issue for the stack trace + breadcrumbs
4. Use sentry_search_issues with count=true when they ask "how many" / "is it getting worse"
5. Use sentry_pattern_analysis during incidents to see if it's one problem or many

For complex debugging, use the prompts: debug-error, trace-request, health-check.

Example Conversations

User: "Check sentry for errors in the python-fastapi project" AI: Uses sentry_search_issues with project="python-fastapi", query="is:unresolved"

User: "How many errors happened today?" AI: Uses sentry_search_issues with count=true, time_window="24h"

User: "Why is PYTHON-FASTAPI-TK failing?" AI: Uses sentry_get_issue_details with the issue id

User: "Follow trace ce8f0d3961214198a040517b3dfda0d4" AI: Uses sentry_trace_lookup

Configuration

Set the following environment variables:

• SENTRY_AUTH_TOKEN (required): A Sentry auth token. Create one at Settings → Auth Tokens (organization token) or User Settings → Personal Tokens. Required scopes: org:read, project:read, event:read.
• SENTRY_URL: Base URL of your Sentry instance. Default https://sentry.io. SaaS users on a specific region should use https://us.sentry.io, https://de.sentry.io, etc. Self-hosted: your own host.
• SENTRY_ORG: Organization slug. Optional — if omitted, the first org the token can access is auto-detected.
• SENTRY_PROJECT: Default project slug used for tag-value lookups. Optional — defaults to the first project in the org.

Development

bun install
bun run build
bun test

See AGENTS.md for code style and contribution notes.