Borrowing it
Nothing to install: this file belongs to HieuAnh87/sentry-selfhosted-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/HieuAnh87/sentry-selfhosted-mcp/main/AGENTS.mdgit clone --depth 1 https://github.com/HieuAnh87/sentry-selfhosted-mcpWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/hieuanh87/sentry-selfhosted-mcp/agents-md)<a href="https://agentmods.dev/instructions/hieuanh87/sentry-selfhosted-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/hieuanh87/sentry-selfhosted-mcp/agents-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/hieuanh87/sentry-selfhosted-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/hieuanh87/sentry-selfhosted-mcp/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00512 | $0.00512 |
| Opus 5 | $0.00256 | $0.00256 |
| Sonnet 5 | $0.00102 | $0.00102 |
| Haiku 4.5 | $0.00051 | $0.00051 |
Grade A, and why
sentry-selfhosted-mcp AGENTS.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 66 lines — stays where its author put it; the contents beside it link to each section on GitHub.
selfhosted-sentry-mcp
TypeScript MCP server for self-hosted Sentry triage/debug workflows.
Commands
# Install deps
npm install
# Build TypeScript to ./build and set executable bit
npm run build
# Watch mode during source edits
npm run watch
# Run MCP inspector against built server
npm run inspector
# Test full suite (Node test runner)
npm test
# Test smoke flow only
npm run test:smoke
# Run one test file
node --test test/tools.test.js
# Docker image build
docker build -t sentry-selfhosted-mcp:latest .
Boundaries
- Do not commit real
SENTRY_AUTH_TOKENor real Sentry URLs in docs/examples. - Do not edit
build/**directly; source of truth issrc/**. - Keep MCP tool names and input schemas backward compatible unless explicitly requested.
- Avoid widening output payloads without grep/filter controls (token bloat risk).
Where to look
| Task | Location | Note |
|---|---|---|
| Tool routing/registry | src/server.ts |
TOOLS array + CallToolRequestSchema switch must stay in sync |
| Env validation/startup behavior | src/config.ts |
validation runs on module load; missing env throws immediately |
| Sentry HTTP endpoints | src/api/client.ts |
all endpoint path composition centralized here |
| Output filtering/truncation logic | src/helpers/{filter,truncate,grep}.ts |
use helpers before returning large JSON |
| Tool contract expectations | test/tools.test.js |
expected tool list currently fixed at 24 |
Conventions (deviations only)
- ESM imports use explicit
.jsextension in TS source (Node16 module resolution). - Entry point is intentionally thin:
src/index.tsonly imports./server.jsfor compatibility. - Raw API tool warns on large event payloads and supports
grep_pattern; preserve this behavior.
Anti-patterns (project-specific)
- Don’t call Sentry event endpoints and return full payloads without filtering.
- Don’t add new tools without updating test expectations and registry wiring.
Notes
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 66 lines · 512 tokens per session scan A b636a407df43
sentry-selfhosted-mcp AGENTS.md is an instructions file published in the GitHub repository HieuAnh87/sentry-selfhosted-mcp (9 stars, last pushed 3mo ago), licensed MIT. It adds 512 tokens to every session, about $0.0026 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other instructions, from other repositories
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.