NullprintClaude Code
Let Claude Code create, check and drive your Nullprint profiles through MCP.
All tools / OpenAI Codex
How to use OpenAI Codex with Nullprint
Connect Codex to Nullprint with one command and run browser tasks from the terminal.
What it is
Codex is OpenAI's coding agent for the terminal. Through the Nullprint MCP server it can manage your profiles and browse inside them.
Set it up in Nullprint
- Install Nullprint, sign in and keep the app running. Install uv.
- Connect Nullprint:
codex mcp add nullprint -- uvx nullprint-mcp - Or add this to
~/.codex/config.toml:[mcp_servers.nullprint] command = "uvx" args = ["nullprint-mcp"] - Check it with
codex mcp list. - Start
codexand ask:List my Nullprint profiles and tell me which are running.
Full guide: Claude Code / Codex setup guide
Why they work well together
- One command to connect; no API wrappers to write.
- Each profile keeps its own fingerprint and proxy while Codex works in it.
- The agent can test proxies (
proxy_check) and run check-ups before it starts a profile.
FAQ
Do I need an OpenAI API key?
A ChatGPT plan with Codex works, or an API key.
uvx not found?
Open a new terminal so PATH refreshes.
Server fails to connect?
Run uvx nullprint-mcp --help to see the real error.
Also works with
Claude Desktop
Double-click one file and Claude Desktop can manage your Nullprint profiles.
Playwright
Attach Playwright scripts to any Nullprint profile over CDP, with its fingerprint and proxy intact.