Javascript SDK for FamilySearch
Most file and storage access work still happens through a UI a human drives. Familysearch MCP server moves it into the conversation instead. Javascript SDK for FamilySearch.
This JavaScript SDK is a high-level JavaScript wrapper around the FamilySearch REST API.
Installation goes through your MCP client rather than a global install: point it at familysearch-javascript-sdk on npm and it is fetched when the client starts. The copy-paste blocks for Claude Desktop, Claude Code and Cursor are further down this page.
The server publishes 2 tools. What each one is for:
Cross — platform**Object — oriented**Among the file and storage access options, the useful question is rarely "what can it do" but "what does it cost you to run" — permissions, credentials, and how much of your context its toolset consumes. Familysearch's toolset — Cross, Object — is a fair guide to whether it matches your workflow. It is maintained by familysearch; worth a glance at recent repository activity before you build anything load-bearing on it.
This entry was verified against Familysearch's own documentation before publication; SyncDev keeps the directory reviewed rather than auto-generated.
| Tool | What it does |
|---|---|
| Cross | platform** |
| Object | oriented** |
{
"mcpServers": {
"familysearch": {
"command": "npx",
"args": ["-y", "familysearch-javascript-sdk"]
}
}
}Add to claude_desktop_config.json, then restart Claude Desktop.
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