sallyport
The Python MCP-server half of Sallyport — a security-first bridge between Claude Code (or any MCP client) and your Chrome, with explicit trust boundaries instead of implicit ones.
Claude Code ── MCP/stdio ──▶ daemon (this package) ── WS+HMAC ──▶ extension (MV3) ── CDP ──▶ Chrome
The daemon speaks MCP on stdio and hosts an HMAC-authenticated WebSocket server
on 127.0.0.1:10086 that the companion Chrome extension connects into. Every
frame is signed (HMAC-SHA256 + timestamp + nonce); the extension enforces a
per-domain allowlist and a per-domain opt-in for arbitrary JS.
Install
pip install sallyport
The package installs the sallyport-daemon console command.
Quickstart
sallyport-daemon doctor # check Python, secret file + perms, port; print the pairing block
claude mcp add sallyport sallyport-daemon # register with Claude Code
Then load the unpacked extension (or the release zip) from the main repository and paste the pairing block into its popup.
sallyport-daemon list-tools— print the tool catalogue (no daemon start)sallyport-daemon serve— WS-only mode (no MCP) for wire testingsallyport-daemon exec <tool> k=v …— fire one tool from the shell
Security
The full threat model, the load-bearing invariants, and known limitations live
in SECURITY.md.
In short: loopback-only bind, HMAC on every frame, a domain allowlist enforced
in the extension, per-domain evaluate opt-in, password-field gates, and
daemon-side filesystem sandboxes for upload/save_to_file.
License
MIT — see LICENSE.
1 maintainer
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