cordum-adapters 0.2.3.post0

Cordum adapters for agent frameworks (CrewAI, AutoGen, OpenAI Agents, LangChain) over MCP.

cordum-adapters

Ship any AI-agent framework through Cordum for scope-filtered, policy-gated, tamper-evidently audited tool calls — with a one-line adapter plus your existing framework code.

What this is

cordum-adapters wraps the Cordum MCP bridge as native tool objects for four agent frameworks:

Framework	Install	Tool type	Module
CrewAI	pip install cordum-adapters[crewai]	crewai.tools.BaseTool	cordum_agent_adapters.crewai
AutoGen 0.4+ (AG2)	pip install cordum-adapters[autogen]	autogen_core.tools.BaseTool	cordum_agent_adapters.autogen
pyautogen 0.2 (legacy)	pip install cordum-adapters[autogen-classic]	(functions, function_map)	cordum_agent_adapters.autogen
OpenAI Agents SDK	pip install cordum-adapters[openai-agents]	agents.FunctionTool	cordum_agent_adapters.openai_agents
LangChain	pip install cordum-adapters[langchain]	langchain_core.tools.BaseTool	cordum_agent_adapters.langchain

Every adapter funnels calls through the same MCP stdio client, so the Cordum gateway's scope filter, approval gate, outbound signer, and mcp.tool_invocation audit chain all apply uniformly.

Install

Base install (no framework deps, MCP stdio client only):

pip install cordum-adapters

Per-framework install — pick exactly one of autogen / autogen-classic (they pin incompatible openai versions):

pip install cordum-adapters[crewai]
pip install cordum-adapters[autogen]          # AG2 0.4+
pip install cordum-adapters[autogen-classic]  # pyautogen 0.2
pip install cordum-adapters[openai-agents]
pip install cordum-adapters[langchain]
pip install cordum-adapters[all]              # picks modern AG2

Python 3.10+ supported (framework deps crewai>=0.30, autogen-core>=0.4, openai-agents>=0.1 all require ≥3.10). [dev] adds pytest + build + twine for contributors.

MCP client quickstart (5 lines)

from cordum_agent_adapters.mcp_client import McpStdioClient

client = McpStdioClient(
    command=["cordum-mcp-bridge"],
    env={"CORDUM_GATEWAY_URL": "http://localhost:8081",
         "CORDUM_API_KEY": "<your-key>"},
)
print([tool["name"] for tool in client.list_tools()])

cordum-mcp-bridge is a Go binary shipped by cordum-packs/packs/mcp-bridge. Build with go install or copy from a release artefact onto your $PATH.

CrewAI — 15-minute tutorial

from cordum_agent_adapters.crewai import build_crewai_tools
tools = build_crewai_tools(client)

# Attach to your Crew's Agent.tools, or use the convenience wrapper
# build_crew() to wire agents + tasks from declarative config.

Full walkthrough with retry, async, policy-denied AdapterToolCallError handling, and the build_crew() declarative helper: docs/crewai.md.

AutoGen (AG2 0.4+) — 15-minute tutorial

from cordum_agent_adapters.autogen import (
    build_ag2_tools, register_cordum_tools, CordumConversationLogger,
)

tools = build_ag2_tools(client)                          # list[BaseTool]
logger = CordumConversationLogger(client)                # audits each turn
binding = register_cordum_tools(assistant, client, logger=logger)

Full walkthrough including AssistantAgent wiring, RoundRobinGroupChat, and the seed-a-deny-policy walkthrough: docs/tutorials/autogen.md.

Legacy pyautogen 0.2? See docs/tutorials/autogen_classic.md.

OpenAI Agents SDK — 15-minute tutorial

from cordum_agent_adapters.openai_agents import (
    build_openai_agent_tools, register_cordum_mcp, run_governed, tee_events,
)
from cordum_agent_adapters.audit import CordumConversationLogger

tools = build_openai_agent_tools(client)          # list[agents.FunctionTool]
agent = register_cordum_mcp(my_agent, client)     # clones agent with tools
logger = CordumConversationLogger(client)

result = await run_governed(agent, "task prompt", client=client, logger=logger)
async for event in tee_events(result, logger):
    ...

Full walkthrough with scripted-model E2E test + policy-deny handling: ../../docs/tutorials/openai_agents.md.

LangChain — 15-minute tutorial

from cordum_agent_adapters.langchain import build_langchain_tools
tools = build_langchain_tools(client)            # list[BaseTool]
# Pass into create_react_agent / create_openai_tools_agent / …

The LangChain adapter is a thin wrapper; a dedicated tutorial is tracked for a future release.

FAQ

Can I install [autogen] and [autogen-classic] together? No. pyautogen 0.2 transitively requires openai<1.0; autogen-agentchat 0.4+ requires openai>=1.0. pip install will error. Pick one. If you need to migrate, uninstall pyautogen first, then install the [autogen] extra.

Python version matrix. Python 3.11 and 3.12 are CI-covered (matrix python-version: ['3.11', '3.12'] in .github/workflows/agent-adapters.yml). 3.10 is supported per requires-python=">=3.10" in pyproject.toml but not in CI. 3.13 is expected to work; raise an issue if you hit a snag. Python 3.9 is NOT supported — the underlying framework SDKs (crewai>=0.30, autogen-core>=0.4, openai-agents) require ≥3.10.

Windows path caveat. cordum-mcp-bridge must be on PATH. On Windows/MSYS use forward slashes or rely on shutil.which; the adapter never hard-codes a path separator.

Where do audit events land? The Cordum gateway's Merkle audit chain captures every inbound tool call. Outbound calls (adapter → gateway) also land on mcp.tool_outbound_invocation SIEMEvents when CORDUM_NATS_URL is set (the bridge auto-routes through it). Query GET /api/v1/audit/export or the dashboard Policy Decision Log.

License. Business Source License 1.1 (see LICENSE). Free to use with the documented additional-use grant — open an issue or contact [e-mail] for commercial licensing.

Links

• Cordum docs
• Cordum API reference
• Changelog
• Issues