How do I find my EPO Credentials?

Register for an account at the [**EPO OPS developer portal**](https://developers.epo.org/), create an application, and you will receive your Consumer Key and Consumer Secret. Copy and paste them below.

Does it support legal status checks?

Yes. The `get_patent_legal_status` tool retrieves the current administrative and legal status metadata for specified patent publications.

What format is required for Doc IDs?

The API uses standard EPODOC format (e.g., EP1234567) for patent identifiers across all retrieval tools.

EPO Open Patent Services MCP Server for LangChain 4 tools — connect in under 2 minutes

Name: EPO Open Patent Services
Availability: InStock
Author: Vinkius

python.langchain.com/docs/integrations/tools/mcp

Built by Vinkius GDPR 4 Tools Framework

LangChain is the leading Python framework for composable LLM applications. Connect EPO Open Patent Services through the Vinkius and LangChain agents can call every tool natively — combine them with retrievers, memory, and output parsers for sophisticated AI pipelines.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius supports streamable HTTP and SSE.

python

import asyncio
from langchain_mcp_adapters.client import MultiServerMCPClient
from langchain_openai import ChatOpenAI
from langgraph.prebuilt import create_react_agent

async def main():
    # Your Vinkius token — get it at cloud.vinkius.com
    async with MultiServerMCPClient({
        "epo-open-patent-services": {
            "transport": "streamable_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,
        )
        response = await agent.ainvoke({
            "messages": [{
                "role": "user",
                "content": "Using EPO Open Patent Services, show me what tools are available.",
            }]
        })
        print(response["messages"][-1].content)

asyncio.run(main())

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About EPO Open Patent Services MCP Server

Empower your AI agent to orchestrate your entire intellectual property research and patent auditing workflow with EPO Open Patent Services (OPS), the authoritative source for European and global patent data. By connecting the EPO OPS API to your agent, you transform complex patent searches into a natural conversation. Your agent can instantly retrieve bibliographic metadata, audit legal statuses, and identify applicants without you ever touching a patent portal. Whether you are conducting competitive intelligence or managing corporate IP constraints, your agent acts as a real-time patent consultant, ensuring your data is always verified and precise.

LangChain's ecosystem of 500+ components combines seamlessly with EPO Open Patent Services through native MCP adapters. Connect 4 tools via the Vinkius and use ReAct agents, Plan-and-Execute strategies, or custom agent architectures — with LangSmith tracing giving full visibility into every tool call, latency, and token cost.

What you can do

Patent Auditing — Search for thousands of published patents and retrieve high-resolution metadata, including titles, applicants, and publication dates.
Legal Oversight — Audit the current legal status of any patent publication to understand the administrative reach of IP rights instantly.
Bibliographic Discovery — Query detailed bibliographic data for specific Doc IDs to assist in deep-dive archival classification.
Data Intelligence — Retrieve unique patent identifiers and applicant information to maintain strict organizational control over IP data.
Operational Monitoring — Check API status to ensure your patent research workflow is always operational.

The EPO Open Patent Services MCP Server exposes 4 tools through the Vinkius. Connect it to LangChain in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect EPO Open Patent Services to LangChain via MCP

Follow these steps to integrate the EPO Open Patent Services MCP Server with LangChain.

Install dependencies

Run pip install langchain langchain-mcp-adapters langgraph langchain-openai

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Run the agent

Save the code and run python agent.py

Explore tools

The agent discovers 4 tools from EPO Open Patent Services via MCP

Why Use LangChain with the EPO Open Patent Services MCP Server

LangChain provides unique advantages when paired with EPO Open Patent Services through the Model Context Protocol.

The largest ecosystem of integrations, chains, and agents — combine EPO Open Patent Services MCP tools with 500+ LangChain components

Agent architecture supports ReAct, Plan-and-Execute, and custom strategies with full MCP tool access at every step

LangSmith tracing gives you complete visibility into tool calls, latencies, and token usage for production debugging

Memory and conversation persistence let agents maintain context across EPO Open Patent Services queries for multi-turn workflows

EPO Open Patent Services + LangChain Use Cases

Practical scenarios where LangChain combined with the EPO Open Patent Services MCP Server delivers measurable value.

RAG with live data: combine EPO Open Patent Services tool results with vector store retrievals for answers grounded in both real-time and historical data

Autonomous research agents: LangChain agents query EPO Open Patent Services, synthesize findings, and generate comprehensive research reports

Multi-tool orchestration: chain EPO Open Patent Services tools with web scrapers, databases, and calculators in a single agent run

Production monitoring: use LangSmith to trace every EPO Open Patent Services tool call, measure latency, and optimize your agent's performance

EPO Open Patent Services MCP Tools for LangChain (4)

These 4 tools become available when you connect EPO Open Patent Services to LangChain via MCP:

check_api_status

Check if the EPO Open Patent Services are operational

get_patent_bibliographic

Get full bibliographic metadata for a specific patent by Doc ID

get_patent_legal_status

Check the current legal status of a patent publication

search_epo_patents

Search for published patents in the EPO database

Example Prompts for EPO Open Patent Services in LangChain

Ready-to-use prompts you can give your LangChain agent to start working with EPO Open Patent Services immediately.

"Search for patents related to 'electric vehicles' using EPO OPS."

"What is the legal status of patent 'EP1234567'?"

"Get bibliographic details for Doc ID 'US20230000001'."

Troubleshooting EPO Open Patent Services MCP Server with LangChain

Common issues when connecting EPO Open Patent Services to LangChain through the Vinkius, and how to resolve them.

MultiServerMCPClient not found

Install: pip install langchain-mcp-adapters

EPO Open Patent Services + LangChain FAQ

Common questions about integrating EPO Open Patent Services MCP Server with LangChain.

How does LangChain connect to MCP servers?

Use langchain-mcp-adapters to create an MCP client. LangChain discovers all tools and wraps them as native LangChain tools compatible with any agent type.

Which LangChain agent types work with MCP?

All agent types including ReAct, OpenAI Functions, and custom agents work with MCP tools. The tools appear as standard LangChain tools after the adapter wraps them.