agent-guard

Name: agent-guard
Author: ipezygj

The safety check an AI agent runs before it acts.

Every agent that installs packages, runs shell commands, or commits/outputs text can do real damage: install malware, wipe a disk, or leak a credential. agent-guard is three cheap, dependency-free checks — the "look before you leap" gate an agent (or you) calls before the irreversible step.

pip install agent-tripwire            # the checks (zero deps)
pip install "agent-tripwire[mcp]"     # + the MCP server for agents

Use it as an MCP tool (for agents)

An agent can call these itself before acting. Add to your MCP client (Claude/Cursor/Claude Code):

{ "mcpServers": { "agent-guard": { "command": "agent-guard-mcp" } } }

MCP registry identity — mcp-name: io.github.ipezygj/agent-guard

tool	the agent calls it before…
`check_package`	`pip/npm install` — is it real, malware, a typosquat, or does it run code on install?
`check_command`	running a shell command — is it a destructive / remote-code-exec vector (rm -rf, curl\|bash, dd, force-push)?
`scan_secrets`	committing / pasting / logging — does the text leak an API key, token, or private key?
`scan_project`	deploying / shipping a web backend — fail-open auth, unsigned payment webhooks, SQL injection, SSRF, hardcoded secrets?

Related MCP server: repo-seatbelt

The checks

check_package — existence on the registry (a hallucinated name is a red flag), typosquat distance to popular packages, npm install/postinstall scripts (the classic supply-chain malware vector), and OSV malware/vulnerability advisories. Mainstream packages pass; look-alikes and install-time-code flag.

check_command — matches destructive / RCE shell patterns with a severity and a plain reason. rm -rf /, curl … | bash, dd of=/dev/sda, fork bombs → critical; force-push, hard-reset, sudo, DROP TABLE → high.

scan_secrets — AWS/OpenAI/Anthropic/Google/Stripe/GitHub/Slack keys, private-key blocks, JWTs, and generic api_key=/password= assignments. Returns each finding (type, line, redacted).

scan_project — reads a web/API backend (directory or single .py) for the money-losing logic bugs a secret- or command-scanner can't see: auth that fails open when a secret is unset, payment webhooks with no signature check (a forged checkout mints free credits), SQL built by string interpolation, SSRF-able f-string URLs, and secrets hardcoded as defaults. Each finding gives the file, line, why, and the fix. FP-disciplined: parameterized SQL, signed webhooks, and fail-closed guards stay silent.

from agent_guard import analyze_command, scan_secrets, check_package
from agent_guard.webscan import scan_project
analyze_command("rm -rf /")["danger"]           # "critical"
scan_secrets("token = 'ghp_...'")["leaked"]     # True
check_package("reqwests", "pypi")["risk"]       # "high" (typosquat of requests)
scan_project("./my_api")["risk"]                # "critical" if a webhook skips signature checks

The point: an agent about to install/run/commit should check first — and now it can, in one call, with a plain verdict and a recommendation. If a check comes back high/critical, stop and get a human.