How do I find my FamilySearch Access Token?

Log in to the [**FamilySearch Developer portal**](https://www.familysearch.org/developers/), and you can generate a Personal Access Token or use the OAuth flow to obtain one. Copy and paste it below.

Can the agent show my family tree?

Yes. Use the `get_person_pedigree` tool providing a starting person ID. Your agent will return the ancestry chart metadata instantly.

Are photos and stories included?

Yes. The `get_person_memories` tool retrieves any photos, stories, and documents (memories) associated with a specified person in the tree.

FamilySearch API MCP Server for LangChain 6 tools — connect in under 2 minutes

Name: FamilySearch API
Availability: InStock
Author: Vinkius

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

Built by Vinkius GDPR 6 Tools Framework

LangChain is the leading Python framework for composable LLM applications. Connect FamilySearch API through 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({
        "familysearch-api": {
            "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 FamilySearch API, show me what tools are available.",
            }]
        })
        print(response["messages"][-1].content)

asyncio.run(main())

Fully ManagedVinkius Servers

60%Token savings

High SecurityEnterprise-grade

IAMAccess control

EU AI ActCompliant

DLPData protection

V8 IsolateSandboxed

Ed25519Audit chain

<40msKill switch

Stream every event to Splunk, Datadog, or your own webhook in real-time

* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure

About FamilySearch API MCP Server

Empower your AI agent to orchestrate your entire genealogical research and ancestry auditing workflow with the FamilySearch API, the world's largest platform for family history. By connecting FamilySearch to your agent, you transform complex ancestor searches into a natural conversation. Your agent can instantly retrieve person details, audit pedigree charts, and query historical record collections without you ever touching a genealogy portal. Whether you are building your family tree or conducting deep-dive historical audits, your agent acts as a real-time genealogical consultant, ensuring your data is always verified and precise.

LangChain's ecosystem of 500+ components combines seamlessly with FamilySearch API through native MCP adapters. Connect 6 tools via 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

Person Auditing — Search for millions of persons in the FamilySearch global tree and retrieve detailed metadata, including lifespans and birth/death places.
Pedigree Oversight — Audit the ancestry charts for specific individuals to maintain a clear view of lineage distribution and scale.
Memories Discovery — Retrieve photos, stories, and documents associated with specific persons to identify relevant assets instantly.
Record Intelligence — List available historical record collections to understand the organizational reach of global archives.
Metadata Intelligence — Retrieve unique identifiers and display names for any genealogical record to assist in deep-dive classification.

The FamilySearch API MCP Server exposes 6 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 FamilySearch API to LangChain via MCP

Follow these steps to integrate the FamilySearch API 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 6 tools from FamilySearch API via MCP

Why Use LangChain with the FamilySearch API MCP Server

LangChain provides unique advantages when paired with FamilySearch API through the Model Context Protocol.

The largest ecosystem of integrations, chains, and agents. combine FamilySearch API 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 FamilySearch API queries for multi-turn workflows

FamilySearch API + LangChain Use Cases

Practical scenarios where LangChain combined with the FamilySearch API MCP Server delivers measurable value.

RAG with live data: combine FamilySearch API tool results with vector store retrievals for answers grounded in both real-time and historical data

Autonomous research agents: LangChain agents query FamilySearch API, synthesize findings, and generate comprehensive research reports

Multi-tool orchestration: chain FamilySearch API tools with web scrapers, databases, and calculators in a single agent run

Production monitoring: use LangSmith to trace every FamilySearch API tool call, measure latency, and optimize your agent's performance

FamilySearch API MCP Tools for LangChain (6)

These 6 tools become available when you connect FamilySearch API to LangChain via MCP:

check_api_status

Check if the FamilySearch API is operational

get_person_details

Get full details for a specific person in the family tree by ID

get_person_memories

Get memories (photos, stories) associated with a person

get_person_pedigree

Get the ancestry (pedigree) for a specific person

list_historical_collections

List historical record collections available on FamilySearch

search_persons

Search for persons in the FamilySearch Family Tree

Example Prompts for FamilySearch API in LangChain

Ready-to-use prompts you can give your LangChain agent to start working with FamilySearch API immediately.

"Search for 'George Washington' in FamilySearch."

"Show the pedigree for person ID 'KWCX-S58'."

"List available memories for person ID 'LZDP-H7Z'."

Troubleshooting FamilySearch API MCP Server with LangChain

Common issues when connecting FamilySearch API to LangChain through the Vinkius, and how to resolve them.

MultiServerMCPClient not found

Install: pip install langchain-mcp-adapters

FamilySearch API + LangChain FAQ

Common questions about integrating FamilySearch API 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.