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geni-mcp

by raphink
OverviewSchemaRelated ServersScoreDiscussions
TypeScript
Hybrid

geni-mcp

An MCP (Model Context Protocol) server that gives Claude access to Geni — the collaborative genealogy platform. Use Claude to browse, search, correct, and extend your family tree.

Features

Tool

Description

get_authorization_url

Start the OAuth flow — get the URL to authorize Claude

exchange_code

Complete OAuth — exchange the code for tokens

get_my_profile

Get your own Geni profile

get_profile

Look up any profile by ID

update_profile

Correct names, dates, locations, biography

create_profile

Add a new person to Geni

get_immediate_family

Get parents, siblings, spouses, children

get_relationship_path

Find relationship path between two profiles

get_union

Get a family unit (couple + children)

add_relation

Add a parent, child, sibling, or spouse

search_profiles

Search by name with optional birth/death filters

get_merge_candidates

Find potential duplicate profiles

merge_profiles

Merge a duplicate into a base profile

Related MCP server: Claude Historian

Prerequisites

  1. A Geni account at geni.com

  2. A registered Geni app — create one at geni.com/platform/developer/apps

  3. Node.js 20+

Setup

1. Clone & install

git clone https://github.com/raphink/geni-mcp.git
cd geni-mcp
npm install
npm run build

2. Create a Geni developer app

  1. Go to geni.com/platform/developer/apps

  2. Create a new app

  3. Set the Redirect URI to:

    • Local use: http://localhost:3000/oauth/callback

    • GCP Functions: https://YOUR_FUNCTION_URL/oauth/callback

  4. Note your App ID (client ID) and App Secret

3. Configure environment variables

export GENI_CLIENT_ID="your_app_id"
export GENI_CLIENT_SECRET="your_app_secret"
export GENI_REDIRECT_URI="http://localhost:3000/oauth/callback"

# Optional — skip OAuth flow if you already have a token:
export GENI_ACCESS_TOKEN="your_access_token"
export GENI_REFRESH_TOKEN="your_refresh_token"  # enables auto-renewal

Running locally (Claude Code / Claude Desktop)

Stdio mode (recommended for Claude Code)

Add to your Claude Code MCP config (.claude/mcp.json or ~/.claude/mcp.json):

{
  "mcpServers": {
    "geni": {
      "command": "node",
      "args": ["/path/to/geni-mcp/dist/index.js"],
      "env": {
        "GENI_CLIENT_ID": "your_app_id",
        "GENI_CLIENT_SECRET": "your_app_secret",
        "GENI_REDIRECT_URI": "http://localhost:3000/oauth/callback"
      }
    }
  }
}

Claude Desktop config

Add to ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "geni": {
      "command": "node",
      "args": ["/path/to/geni-mcp/dist/index.js"],
      "env": {
        "GENI_CLIENT_ID": "your_app_id",
        "GENI_CLIENT_SECRET": "your_app_secret",
        "GENI_REDIRECT_URI": "http://localhost:3000/oauth/callback"
      }
    }
  }
}

Deploying to GCP Cloud Functions

Secrets are stored in Cloud Secret Manager. Create them once:

echo -n "your_app_id" | gcloud secrets create GENI_CLIENT_ID --data-file=- --project=YOUR_PROJECT
echo -n "your_app_secret" | gcloud secrets create GENI_CLIENT_SECRET --data-file=- --project=YOUR_PROJECT

Grant the function's service account access to both secrets, then deploy:

./deploy.sh

Or manually:

gcloud functions deploy geni-mcp \
  --gen2 \
  --runtime=nodejs22 \
  --region=europe-west1 \
  --source=. \
  --entry-point=geniMcp \
  --trigger-http \
  --allow-unauthenticated \
  --remove-env-vars="GENI_CLIENT_ID,GENI_CLIENT_SECRET" \
  --set-secrets="GENI_CLIENT_ID=GENI_CLIENT_ID:latest,GENI_CLIENT_SECRET=GENI_CLIENT_SECRET:latest"

The function exposes two endpoints:

  • POST /mcp — MCP protocol (StreamableHTTP)

  • GET /oauth/callback — OAuth redirect handler

Using the deployed function with Claude Code

{
  "mcpServers": {
    "geni": {
      "type": "streamable-http",
      "url": "https://YOUR_FUNCTION_URL/mcp"
    }
  }
}

Note on token persistence: Cloud Functions are stateless. The OAuth flow issues fresh tokens per session via the built-in MCP OAuth server. GENI_CLIENT_ID and GENI_CLIENT_SECRET are loaded at runtime from Cloud Secret Manager.

First use — OAuth flow

The first time you use the server (without pre-set tokens), ask Claude:

"Authorize my Geni account"

Claude will:

  1. Call get_authorization_url and give you a link

  2. You visit the link in your browser and click "Allow"

  3. Geni redirects to your callback URL with a code parameter

  4. Tell Claude the code (or Claude will read it from the URL)

  5. Claude calls exchange_code and you're authenticated

After authenticating, Claude can do things like:

"Find all profiles named 'Johann Schmidt' born in the 1800s in Germany"

"Show me the immediate family of profile-123456789"

"Correct the birth date for profile-123456789 to 15 March 1847 in London, England"

"Find duplicate profiles for profile-123456789 and merge them"

Project structure

src/
  index.ts          # Stdio MCP server (local use)
  gcpFunction.ts    # GCP Cloud Functions HTTP handler
  tools.ts          # MCP tool definitions and handlers
  geni-client.ts    # Geni REST API client
  oauth.ts          # OAuth 2.0 flow helpers
  types.ts          # TypeScript types for Geni API
  zod-to-json.ts    # Zod → JSON Schema converter
dist/               # Compiled output (after npm run build)

Development

npm run dev         # Run with tsx (no compile step)
npm run build       # Compile TypeScript
npm run lint        # Type-check only

License

MIT

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