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MCP Hook Conformance MCP server

by studiomeyer.io·io.studiomeyer/hook-conformance·v0.1.3
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Audits MCP servers for Claude Code mcp_tool hook readiness: idempotency, latency, side-effects.

A86/100grade A
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Safety scan
A86/100

full report

Adoption
Growing

0 stars106 downloads/wk

Reviews

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Nobody has reviewed MCP Hook Conformance yet.

If you have run it, two minutes of your experience saves the next person an afternoon.

MCP Hook Conformance tools

No tool declarations could be read from the package source. They show once the server is installed.

Public scan report

scanner v0.1.10 · 2026-11-02 · same rubric, same numbers if you re-run it

no findings
  • Code scan33 source files scanned25/25
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitylocal package, no credentials required12/15
  • Maintenancelast push 1 days ago15/15
  • Maintainer identitynamespace and repository owner differ4/10
Overall 86/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How MCP Hook Conformance compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
86/100
higher than 72% of 48,243 servers
Downloads a week
106
more than 64% of 12,306 servers with a package

Install MCP Hook Conformance in Claude Code, Cursor or VS Code

Runs npx -y mcp-hook-conformance on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add hook-conformance -- npx -y mcp-hook-conformance
Add to Cursor

What the publisher says

From the MCP Hook Conformance repository's README, as published. We do not edit it. Read it on GitHub

<!-- studiomeyer-mcp-stack-banner:start -->

Part of the StudioMeyer MCP Stack — Built in Mallorca 🌴 · ⭐ if you use it

<!-- studiomeyer-mcp-stack-banner:end -->

mcp-hook-conformance

<!-- badges --> <!-- /badges -->Test-harness CLI that audits any MCP server for Claude Code v2.1.118 mcp_tool lifecycle-hook readiness.

The third foundation pillar:

  • mcp-protocol-conformance says: does the server speak the protocol?
  • mcp-server-attestation says: who signed this server?
  • mcp-hook-conformance says: is it safe to call this tool from a Stop, PreCompact, or UserPromptSubmit hook?

A note from us

We have been building tools and systems for ourselves for the past two years. The fact that this repo is small and has few stars is not because it is new. It is because we only just decided to share what we have built. It is not a fresh experiment, it is a long story with a recent commit.

We love building things and sharing them. We do not love social media tactics, growth hacks, or chasing stars and followers. So this repo is small. The code is real, it gets used, issues get answered. Judge for yourself.

If it helps you, sharing, testing, and feedback help us. If it could be better, an issue is more useful. If you build something with it, tell us at hello@studiomeyer.io. That genuinely makes our day.

From a small studio in Palma de Mallorca.

Install

npm install -g mcp-hook-conformance

Or run without install:

npx mcp-hook-conformance check ./hook-conformance.config.json

Quick start

# 1. Scaffold a config
npx mcp-hook-conformance init --server-name my-mcp-server

# 2. Edit hook-conformance.config.json (point command/args at your server)

# 3. Run the audit
npx mcp-hook-conformance check ./hook-conformance.config.json

Exit codes:

  • 0 audit passed (no FAILs)
  • 1 audit produced at least one FAIL
  • 2 config error (missing file, invalid schema, unknown suite name)

Subcommands

This is a CLI, not an MCP server. Do NOT run mcp-hook-conformance via mcp-inspector — the package declares mcp.specVersion for the targets it audits, not because it speaks MCP itself. Inspector will EACCES on dist/index.js (which is the library export) by design.

Audit suites

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

MCP Hook Conformance: common questions

Is MCP Hook Conformance MCP server safe?
Yes, by our scan: it is graded A (86/100). Read the MCP Hook Conformance safety report
How do I install MCP Hook Conformance?
It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does MCP Hook Conformance need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is MCP Hook Conformance maintained?
The last commit was 3 days ago (2026-11-02). The latest release is v0.1.3.
How does MCP Hook Conformance compare with other MCP servers?
safety score 86/100 (higher than 72% of 48,243 servers); downloads a week 106 (more than 64% of 12,306 servers with a package). Full comparison.

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