pctx

The open source framework to connect AI agents to tools and mcp with Code Mode

Install

# Homebrew
brew install portofcontext/tap/pctx

# cURL
curl --proto '=https' --tlsv1.2 -LsSf https://raw.githubusercontent.com/portofcontext/pctx/main/install.sh | sh

# npm
npm i -g @portofcontext/pctx

Core Functionality

pctx can be run as a stateless HTTP server for Code Mode sessions or as a unified MCP server that exposes Code Mode functionality for registered upstream MCP servers.

# Start Code Mode for Python SDK
pctx start

# Start Code Mode as a unified MCP server
pctx mcp init
pctx mcp dev

Python SDK

Use the Python SDK if building agents in Python and want to run Code Mode with custom tools and/or MCP servers. The Python SDK is an HTTP client to the pctx server.

pip install pctx-client

from pctx_client import Pctx, tool
from agents import Agent # Use any Agent SDK
from agents.run import Runner # This example is OpenAI Agents SDK

@tool
def get_weather(city: str) -> str:
    """Get weather information for a given city."""
    return f"It's always sunny in {city}!"

pctx = Pctx(tools=[get_weather]) # or with mcp: servers=[your_mcp]

tools = pctx.openai_agents_tools() # Run Code Mode with any Agent SDK
agent = Agent(
    name="GreatCoder",
    model="litellm/openrouter/openai/gpt-oss-120b",
    instructions="You run code to complete complex tasks.",
    tools=tools,
)