How to Use the LicenseCheck API MCP in LangChain
LangChain agents can now chain license checks directly into your dependency resolution pipelines.
Works with every AI agent you already use
…and any MCP-compatible client
Connect LicenseCheck API MCP to LangChain
Create your Vinkius account to connect LicenseCheck API to LangChain and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.
Chain license checks in LangChain
`check_software_license` lets your LangChain agent pull license details from this MCP Server the second a new package is introduced. The agent grabs the license type and passes it directly to the next step in the chain to verify company compliance. Using LangSmith, you can trace every single call to `get_license_details` to see exactly which conditions triggered a warning. This setup ensures your pipeline halts the build if a GPL license sneaks into a proprietary repository.
Multi-step compliance reasoning
`list_all_licenses` provides the raw data your ReAct agent needs to build a local compliance whitelist. The agent compares incoming package metadata against this list during multi-step reasoning loops. When a package has an obscure license, the agent calls `get_license_details` to parse the legal text. It passes this output to your LLM to determine if the terms conflict with your commercial distribution rules.
Live service monitoring in pipelines
`check_api_status` runs at the start of your LangChain run to make sure the MCP Server is live before initiating long-running dependency audits. If the service is offline, the chain fails gracefully instead of burning tokens on failed calls. You configure this check as the initial node in your LangGraph state machine. This keeps your automated compliance pipelines stable and prevents half-finished audits from polluting your pull request comments.
Set up LicenseCheck API MCP in LangChain
Prerequisites
- Python 3.10+ installed
-
langchain-mcp-adapters+langgraphpackages - Active Vinkius subscription with a valid endpoint token
- 1
Install dependencies
Run
pip install langchain-mcp-adapters langgraph langchain-openai. The MCP adapters package converts MCP tools into native LangChainBaseToolobjects. - 2
Connect via HTTP transport
Use
MultiServerMCPClientwith"transport": "http"pointing to your Vinkius endpoint. Replace[YOUR_TOKEN_HERE]with your token from cloud.vinkius.com. - 3
Create a ReAct agent
Pass the discovered tools to
create_react_agent()from LangGraph. The agent automatically routes LicenseCheck API tool calls through the MCP protocol. - 4
Run with any LLM
Swap
ChatOpenAIforChatAnthropic,ChatGoogleGenerativeAI, or any LangChain-compatible model. The MCP tools work identically across all providers.
from langchain_mcp_adapters.client import MultiServerMCPClient
from langgraph.prebuilt import create_react_agent
from langchain_openai import ChatOpenAI
async with MultiServerMCPClient({
"licensecheck-api-mcp": {
"transport": "http",
"url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
}
}) as client:
tools = client.get_tools()
agent = create_react_agent(
ChatOpenAI(model="gpt-4o"),
tools,
)
result = await agent.ainvoke({
"messages": "List recent LicenseCheck API transactions"
})
print(result["messages"][-1].content) Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by LicenseCheck. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.
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Common questions about LicenseCheck API MCP in LangChain
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