Refuse

What it does

Refuse sits in front of npm, pip, cargo, gem, go + 13 more package managers and refuses known-vulnerable installs before they hit disk — the moment you (or your coding agent) run them. Also, Open-source, self-hostable, one Docker container.

Open-source shim for npm, pip, cargo, gem, go and 13 other package managers. Refuses vulnerable installs whether you ran them, your agent did, or CI did. 362,000+ advisories across 21 ecosystems.

We refuse vulnerable packages so your SHELL doesn't install them — and neither does your agent or your CI. refuse needs a server to check packages against. Pick where it lives — you can switch later. Same binary on every platform. Wraps npm, pip, cargo, gem, go and 13 other managers. curl -fsSL https://raw.githubusercontent.com/RefuseHQ/refuse-cli/main/scripts/install.sh | sh Wiring it into Claude Code, Cursor, Codex, or any MCP client? Full install docs → One prompt. Paste your key (or your self-host URL). Saves to ~/.refuse/config.yaml. $ refuse init Server URL [https://mcp.refuse.dev]: ↵ API key (paste rfs_…, or leave blank for localhost): rfs_•••••••• ✓ wrote ~/.refuse/config.yaml…from refuse.dev

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