argox — Python SDK

pip install argox

For agents that aren't Claude Code (LangChain tools, OpenAI Agents SDK, a homegrown loop) and so have no PreToolUse/PostToolUse hook mechanism to plug into. Wrap your own tool calls with two lines:

import argox as at

def write_file(path, content):
    result = at.check("write_file", path)
    if not result.allowed:
        raise PermissionError(result.reason)

    output = _actually_write(path, content)

    at.record_output("write_file", path, output)
    return output

action is a generic verb -- read_file / write_file / run_shell / call_api get real policy rules (path denylist, dangerous shell detection, taint-based secret/PII exfil checks). Any other string still gets a decision back (default-allow), just without a verb-specific rule.

Config

Reads ARGOX_API_KEY (the same key argox connect writes for Claude Code) and optionally ARGOX_API_BASE from the environment, or pass them explicitly:

at.configure(api_key="...", api_base="https://your-instance")

Sessions

Pass the same session_id across an agent run's tool calls to group them into one session/trace on the dashboard, and so later check() calls inherit taint tags absorbed by earlier record_output() calls (e.g. a call_api right after a read_file that returned a secret gets flagged even though the call itself looks benign in isolation). Omit it and each call is treated as its own session.

Errors vs. denials

A policy "deny" is a normal, successful check() result (result.allowed is False) -- not an exception. ArgoxError is only raised for auth/network/protocol failures talking to the backend itself. check() never raises on a deny, so callers must check .allowed.