Vibe CheckCAUTION
Vibe Check is a tool that provides mentor-like feedback to AI Agents, preventing tunnel-vision, over-engineering and reasoning lock-in for complex and long-horizon agent workflows. KISS your over-eager AI Agents goodbye! Effective for: Coding, Ambiguous Tasks, High-Risk tasks
Overview
From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.
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
73d4820ca44eOBSERVED · 2026-09-30Connect
Built from this server's own package name, version and transport as found in its source — not copied from anyone's documentation, so it cannot drift against a page we do not control. Replace the environment placeholders with a token scoped to the least it needs.
claude mcp add vibe-check-mcp --env ANTHROPIC_API_KEY=${ANTHROPIC_API_KEY} --env ANTHROPIC_AUTH_TOKEN=${ANTHROPIC_AUTH_TOKEN} --env GEMINI_API_KEY=${GEMINI_API_KEY} --env OPENAI_API_KEY=${OPENAI_API_KEY} -- npx -y @pv-bhat/[email protected]{
"mcpServers": {
"vibe-check-mcp": {
"command": "npx",
"args": [
"-y",
"@pv-bhat/[email protected]"
],
"env": {
"ANTHROPIC_API_KEY": "${ANTHROPIC_API_KEY}",
"ANTHROPIC_AUTH_TOKEN": "${ANTHROPIC_AUTH_TOKEN}",
"GEMINI_API_KEY": "${GEMINI_API_KEY}",
"OPENAI_API_KEY": "${OPENAI_API_KEY}"
}
}
}
}Exposed tools (5)
3 read · 1 write · 1 destructive. Blast radius: 1 tool can delete or overwrite — an agent that can be talked into calling a tool can be talked into calling this one.
| Tool | Risk | Description |
|---|---|---|
check_constitution | read | Return the current constitution rules for this session |
reset_constitution | destructive | Overwrite all constitutional rules for this session |
update_constitution | write | Append a constitutional rule for this session (in-memory) |
vibe_check | read | Metacognitive questioning tool that identifies assumptions and breaks tunnel vision to prevent cascading errors |
vibe_learn | read | Pattern recognition system that tracks common errors and solutions to prevent recurring issues |
Trust audit
CAUTIONgrade B · trust 89/100 Install with care. The audit found things worth knowing before you trust its output.
| Layer | What it checks | Result |
|---|---|---|
| L0 | Provenance & inventory | PASS |
| L1 | Static analysis of the code | WARN |
| L2 | Instruction surface (what it tells the agent) | PASS |
| L3 | Class-specific surface | WARN |
| L4 | Behavioural (sandbox) | SKIPPED |
What the source does
- Filesystem
- declared (2 observation(s))
- Network
- declared (3 observation(s))
- Shell
- declared (1 observation(s))
- Dependencies
- not all pinned
- Secrets in source
- none-found
Findings (10)
baseEntry.url = options.httpUrl ?? 'http://127.0.0.1:2091';
reset_constitution
const pkg = require('../../package.json') as { version?: string };- `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`.
The CLI supports stdio and HTTP transports. Transport resolution follows this order: explicit flags (`--stdio`/`--http`) → `MCP_TRANSPORT` → default `stdio`. When using HTTP, specify `--port` (or set
"serverUrl": "http://127.0.0.1:2091",
@google/genai, @modelcontextprotocol/sdk, axios, commander, cors, diff, dotenv, execa
For supported providers, secret resolution, and storage guidance, read [API Keys & Secret Management](./api-keys.md). The notes below cover only client-specific requirements and edge cases.
Attachments/vibelogo.png
Gates applied: no_behavioural_pass.
73d4820ca44efull audit observations/trust-audit/mcp-server/pv-bhat__vibe-check.json · Report an issue / request a re-scanAudit history
Every audit this server has had. A grade with a past is a grade somebody is still checking.
| Date | Source | Verdict | Grade | Score | Change |
|---|---|---|---|---|---|
| 2026-09-30 | 73d4820ca44e | CAUTION | B | 89 | first audit |
Questions
What is the Vibe Check MCP server?
Vibe Check is a tool that provides mentor-like feedback to AI Agents, preventing tunnel-vision, over-engineering and reasoning lock-in for complex and long-horizon agent workflows. KISS your over-eager AI Agents goodbye! Effective for: Coding, Ambiguous Tasks, High-Risk tasks
What tools does Vibe Check expose?
5 in total: 3 read-only, 1 that write, and 1 that can delete or overwrite (reset_constitution). Every one is listed on this page with its risk.
Is Vibe Check safe to connect to an agent?
With care. The audit graded it B (89/100) and found 10 things worth knowing before you trust this server, listed below with the exact line each was found on. Separately from the audit: 1 of its tools can destroy data, so scope the token you give it to what you actually need.
What credentials does Vibe Check need?
It reads ANTHROPIC_API_KEY, ANTHROPIC_AUTH_TOKEN, GEMINI_API_KEY, OPENAI_API_KEY and OPENROUTER_API_KEY from the environment. Give it a token scoped to the least it needs — an agent that can be talked into calling a tool can be talked into calling it with your credentials.
How does Vibe Check run?
It speaks stdio and streamable-http, so it runs as a local process your client starts. It is published on npm as @pv-bhat/vibe-check-mcp at 2.9.0.
How current is this page?
The grade is for one exact copy of the source (73d4820ca44e), read on 2026-09-30. The repository is watched and re-audited when it changes.