Rugsnare

Rugsnare is a CLI tool that pins Model Context Protocol tool contracts and diffs upgrades to catch silent drift.

Rugsnare is a CLI tool built to monitor Model Context Protocol servers used by AI agents. It pins each tool contract using a canonicalized SHA-256 hash at install time and compares the pins on every upgrade. The tool grades changes by direction such as breaking, loosened, expanded, notation, or cosmetic. It exits with a status of one on any detected drift, allowing it to function as a CI gate. It is designed for developers running MCP servers in production who need to prevent agents from following unapproved instructions.

Rugsnare at a glance

Best for: Software engineer
Runs on: CLI, open source
Pricing: Free
Released: October 2026
Category: AI agent tool
Website: github.com/paraphern/rugsnare

Key features

Pin tool contracts by canonicalized sha-256
Diff pins on every server upgrade
Grade changes by direction like breaking and loosened
Exit with status 1 on drift for CI gates
Zero npm dependencies and Apache-2.0 license

Use it for

Pin MCP server tool contracts at install time
Detect silent contract changes in CI pipelines
Audit schema updates for AI agent security

Alternatives to Rugsnare

AgentDock — It coordinates multi-device workflows and provides secure environment access.
APIStack — Connect AI agents to over 100 tools using one API key or a single MCP endpoint.
Agensh — Scales to 1,024 self-organizing agents without a central orchestrator.
RugShield 402 — Detects honeypots and simulates taxes on Base for 0.005 USDC per scan.
Ramet — Persists agent files and Git state across sandbox replacements with selective resets.
Vigil — Drives end-to-end security engagements with specialist agents and a shared Kali container.
MCP Bouncer — Stops agents from exfiltrating data to destinations found in untrusted tool output.
Adyen — Share AI agent resources across coding tools and repositories easily.
Discord CLI — Run Discord operations from shell scripts, cron jobs, CI, or AI agents using JSON output.
Clai — Query twelve models and local Ollama directly from your terminal using unix pipes.
TaintWall — Enforces deterministic security policies at the tool boundary for AI agents.
Corgi — Keeps agents running in the background and tracks every action.

All Rugsnare alternatives