Vibe Check MCP Server

Name: Vibe Check MCP Server
Author: PV-Bhat

by PV-Bhatversion 1.0.0i★ –iRuns on your computer

Registry nameio.github.PV-Bhat/vibe-check-mcp-server

Install

Overview

Description from the maker (original English)

Metacognitive AI agent oversight: adaptive CPI interrupts for alignment, reflection and safety

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiVery new↓ 551/wk · ★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Other
You need to fill in: YOUR_API_KEY

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: YOUR_API_KEY

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "vibe-check": {
      "command": "npx",
      "args": [
        "-y",
        "@pv-bhat/vibe-check-mcp"
      ],
      "env": {
        "YOUR_API_KEY": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add vibe-check --env YOUR_API_KEY=your-value -- npx -y @pv-bhat/vibe-check-mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "vibe-check": {
      "command": "npx",
      "args": [
        "-y",
        "@pv-bhat/vibe-check-mcp"
      ],
      "env": {
        "YOUR_API_KEY": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "vibe-check": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@pv-bhat/vibe-check-mcp"
      ],
      "env": {
        "YOUR_API_KEY": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

YOUR_API_KEY secret required env
Your API key for the service

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 8, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account PV-Bhat, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Otheri

More stars than 0% of the other 18595 servers in this category
Published to the registry more recently than 0% of the other 18595 servers in this category
Basic checks equal to or better than 100% of the other 18595 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Vibe Check MCP Server safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: YOUR_API_KEY

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.0.0) reached the registry 14 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, Aiterm MCP

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.

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Aiterm MCP

Persistent terminals and one launcher for Claude, Codex, Grok, Cursor, and Antigravity harnesses.

by kiteponGrowing↓ 4.2K/wkUpdated today

Runs on your computer

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

Vibe Check MCP

This project is in maintenance mode. Active feature development has ended; only maintenance patches (security and bug fixes) are published. v2.9.0 is the latest maintenance release. The server remains fully functional. Community forks and contributions are welcome under the MIT license.

KISS overzealous agents goodbye. Plug & play agent oversight tool.

Based on research:

In our study agents calling Vibe Check improved success +27% and halved harmful actions -41%

Featured on PulseMCP “Most Popular (This Week)” • 5k+ monthly calls on Smithery.ai • research-backed oversight • STDIO + streamable HTTP transport

*Plug-and-play mentor layer that stops agents from over-engineering and keeps them on the minimal viable path — research-backed MCP server keeping LLMs aligned, reflective and safe.*

Trusted by developers across MCP platforms and registries

Quickstart (npx)

Run the server directly from npm without a local installation. Requires Node >=20. Choose a transport:

Option 1 – MCP client over STDIO

npx -y @pv-bhat/vibe-check-mcp start --stdio

Launch from an MCP-aware client (Claude Desktop, Cursor, Windsurf, etc.).
[MCP] stdio transport connected indicates the process is waiting for the client.
Add this block to your client config so it spawns the command:

"mcpServers": { "vibe-check-mcp": { "command": "npx", "args": ["-y", "@pv-bhat/vibe-check-mcp", "start", "--stdio"] } } }

Option 2 – Manual HTTP inspection

npx -y @pv-bhat/vibe-check-mcp start --http --port 2091

curl http://127.0.0.1:2091/healthz to confirm the service is live.
Send JSON-RPC requests to http://127.0.0.1:2091/mcp.

npx downloads the package on demand for both options. For detailed client setup and other commands like install and doctor, see the documentation below.

Recognition

Featured on PulseMCP “Most Popular (This Week)” front page (week of 13 Oct 2025) 🔗
Listed in Anthropic’s official Model Context Protocol repo 🔗
Discoverable in the official MCP Registry 🔗
Featured on Sean Kochel's Top 9 MCP servers for vibe coders 🔗

Quickstart (npx)
What is Vibe Check MCP?
Overview
The Problem: Pattern Inertia & Reasoning Lock-In
Key Features
What's New
Development Setup
Release
Usage Examples
Adaptive Metacognitive Interrupts (CPI)
Agent Prompting Essentials
When to Use Each Tool
Documentation
Research & Philosophy
Security
Roadmap
Contributors & Community
FAQ
Listed on
Credits & License

What is Vibe Check MCP?

Vibe Check MCP keeps agents on the minimal viable path and escalates complexity only when evidence demands it. Vibe Check MCP is a lightweight server implementing Anthropic's Model Context Protocol. It acts as an AI meta-mentor for your agents, interrupting pattern inertia with Chain-Pattern Interrupts (CPI) to prevent Reasoning Lock-In (RLI). Think of it as a rubber-duck debugger for LLMs – a quick sanity check before your agent goes down the wrong path.

Overview

Vibe Check MCP pairs a metacognitive signal layer with CPI so agents can pause when risk spikes. Vibe Check surfaces traits, uncertainty, and risk scores; CPI consumes those triggers and enforces an intervention policy before the agent resumes. See the CPI integration guide and the CPI repo at https://github.com/PV-Bhat/cpi for wiring details.

Vibe Check invokes a second LLM to give meta-cognitive feedback to your main agent. Integrating vibe_check calls into agent system prompts and instructing tool calls before irreversible actions significantly improves agent alignment and common-sense. The high-level component map: docs/architecture.md, while the CPI handoff diagram and example shim are captured in docs/integrations/cpi.md.

The Problem: Pattern Inertia & Reasoning Lock-In

Large language models can confidently follow flawed plans. Without an external nudge they may spiral into overengineering or misalignment. Vibe Check provides that nudge through short reflective pauses, improving reliability and safety.

Key Features

Feature	Description	Benefits
CPI Adaptive Interrupts	Phase-aware prompts that challenge assumptions	alignment, robustness
Multi-provider LLM	Gemini 3.6, Claude 5, GPT-5.6, and OpenRouter support	flexibility
History Continuity	Summarizes prior advice when `sessionId` is supplied	context retention
Optional vibe_learn	Log mistakes and fixes for future reflection	self-improvement

What's New in v2.9.0 (Security & Model Refresh)

Maintenance Notice: This project is in maintenance mode and is no longer under active feature development. It remains fully functional and available under the MIT license. Community forks are welcome. For details, see the Changelog.

Current models: Gemini 3.6 Flash, Claude Sonnet 5 / Opus 5 / Fable 5, and GPT-5.6 Sol / Terra / Luna are now the supported defaults, defined in one registry (src/utils/models.ts)
Native Google AI Studio: migrated from the retired @google/generative-ai package to the unified @google/genai SDK
HTTP hardening: CORS now defaults to loopback origins instead of *, Host headers are validated to block DNS rebinding, and the JSON body cap is explicit and validated
Security: npm audit is clean — 10 advisories resolved across axios, the MCP SDK's Hono stack, form-data, fast-uri, postcss and the test toolchain
Dependencies: MCP SDK 1.29, axios 1.18, OpenAI SDK 6.x, vitest 4.x; the unused body-parser direct dependency was dropped

Session Constitution (per-session rules)

Use a lightweight “constitution” to enforce rules per sessionId that CPI will honor. Eg. constitution rules: “no external network calls,” “prefer unit tests before refactors,” “never write secrets to disk.”

API (tools):

update_constitution({ sessionId, rules }) → merges/sets rule set for the session
reset_constitution({ sessionId }) → clears session rules
check_constitution({ sessionId }) → returns effective rules for the session

Development Setup

# Clone and install

git clone https://github.com/PV-Bhat/vibe-check-mcp-server.git cd vibe-check-mcp-server npm ci npm run build npm test

Use **npm** for all workflows (`npm ci`, `npm run build`, `npm test`). This project targets Node **>=20**.

Create a .env file with the API keys you plan to use:

# Gemini (default)

GEMINI_API_KEY=your_gemini_api_key

Optional providers / Anthropic-compatible endpoints

OPENAI_API_KEY=your_openai_api_key OPENROUTER_API_KEY=your_openrouter_api_key ANTHROPIC_API_KEY=your_anthropic_api_key ANTHROPIC_AUTH_TOKEN=your_proxy_bearer_token ANTHROPIC_BASE_URL=https://api.anthropic.com ANTHROPIC_VERSION=2023-06-01

Optional overrides

DEFAULT_LLM_PROVIDER accepts gemini | openai | openrouter | anthropic

DEFAULT_LLM_PROVIDER=gemini

Leave DEFAULT_MODEL unset to use each provider's default (see table below)

DEFAULT_MODEL=gemini-3.6-flash

Providers and models

Gemini runs natively against Google AI Studio (the Gemini Developer API) through the unified @google/genai SDK. Any model ID the provider accepts will work — the table lists the defaults and the suggestions surfaced to agents in the vibe_check tool schema.

Provider	Default model	Also supported
`gemini`	`gemini-3.6-flash`	`gemini-3.5-flash`, `gemini-3.5-flash-lite`, `gemini-2.5-pro`, `gemini-2.5-flash`
`anthropic`	`claude-sonnet-5`	`claude-opus-5`, `claude-fable-5`, `claude-haiku-4-5-20251001`
`openai`	`gpt-5.6-terra`	`gpt-5.6-sol`, `gpt-5.6-luna`
`openrouter`	(none — required)	any OpenRouter slug, e.g. `google/gemini-3.6-flash`

Set the default globally with DEFAULT_LLM_PROVIDER / DEFAULT_MODEL, or per call with modelOverride. DEFAULT_MODEL names a model of DEFAULT_LLM_PROVIDER; a call that overrides the provider without naming a model falls through to that provider's default rather than re

Only the beginning is shown; read the rest in the repo

Vibe Check MCP Server

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

Aiterm MCP

README from the maker

Vibe Check MCP

Quickstart (npx)

Option 1 – MCP client over STDIO

Option 2 – Manual HTTP inspection

Recognition

Table of Contents

What is Vibe Check MCP?

Overview

The Problem: Pattern Inertia & Reasoning Lock-In

Key Features

What's New in v2.9.0 (Security & Model Refresh)

Session Constitution (per-session rules)

Development Setup

Optional providers / Anthropic-compatible endpoints

Optional overrides

DEFAULT_LLM_PROVIDER accepts gemini | openai | openrouter | anthropic

Leave DEFAULT_MODEL unset to use each provider's default (see table below)

DEFAULT_MODEL=gemini-3.6-flash

Providers and models