mcp-test-harness-langchain

LangChain MCP tools testing helpers for MCP Test Harness.

Author: Vaquar Khan -- https://github.com/vaquarkhan

Install

pip install mcp-test-harness-langchain

This automatically installs mcp-test-harness as a dependency.

Usage

from mcp_test_harness_langchain import assert_langchain_tool, mcp_tools_to_langchain_tools, create_langchain_test_config

async def test_tool(mcp_server):
    await assert_langchain_tool(mcp_server, "my_tool", {}, expected_text="ok")

def test_schema_bridge(mcp_tools):
    # mcp_tools from list_tools — convert for LangChain SDKs
    return mcp_tools_to_langchain_tools(mcp_tools)

cfg = create_langchain_test_config("python server.py", timeout=45)

Helpers

Tool call assertion with optional text check
MCP tool → LangChain schema converter
mcp-test.yaml-shaped config builder

License

Non-commercial use only with mandatory attribution. See LICENSE.

Development Status
- 5 - Production/Stable
Intended Audience
- Developers
Programming Language
- Python :: 3
Topic
- Software Development :: Testing

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