Our grade: 4 checks
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Write a reviewWhy it got a C
A one-person MIT project (npm causly-server, Node.js 22.13+) that runs on your computer over stdio and loads about 245 tools in packs on demand. By default it loads files and folders, a shell command tool, project build and test, web research, lead finding, and a local SQLite sales pipeline, meeting notes and reminders. Add-on packs reach git, GitHub, Vercel, Docker, Terraform, Postgres and MySQL, Supabase, Slack, Notion, Linear, Sentry, Gmail, Google Calendar and Telegram with your own keys, kept in ~/.causly/.env. There is no Causly cloud. Risky actions (shell commands, deploys, merges, deletes, raw SQL, terraform apply) need approval, and it has a read-only mode (CAUSLY_READ_ONLY=true), a per-tool allow/ask/deny policy file, a trimmed environment for child processes and an activity log. No advisories on record. Biggest deduction: the shell command tool loads by default and runs anything outside a short blocklist, and its approval prompt only reaches you in clients that support MCP elicitation (elsewhere the AI's own confirm: true is enough), so start it with --workspace and keep your client's tool approval on.
How to connect
npm install -g causly-server, then causly-server init (adds it to Claude Desktop, Cursor and Windsurf and prints the Claude Code command); init --workspace <folder> limits file and command tools to one folderIs Causly Server safe?
Is Causly Server safe to use?
Causly Server grades C (usable with care). Login is optional, so check that it is turned on in your setup. Upkeep is hard to verify (closed source or a single maintainer), so pin the version you tested. It can run model-controlled code or uses a plaintext remote connection, so run it isolated with no credentials.
Does Causly Server have known vulnerabilities?
Not in our current data: it has no open CVEs or advisories. We re-check as new ones are published.
Does Causly Server support authentication?
Optionally. It can run with a login, but it does not require one, so turn it on.
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