Read and write CardDAV address books: contacts, groups and photos over the open standard
To add CardDAV address books to Claude, run the install command below or copy the ready-made config for Claude Code, Claude Desktop, Cursor and VS Code further down. Restart your client after adding it and its tools show up in your next conversation. It needs 12 environment variables, listed below.
Install
npx -y @ni-c/carddav-mcp@0.1.4Environment variables
CARDDAV_URLSet in your MCP configCARDDAV_USERNAMESet in your MCP configCARDDAV_PASSWORDSet in your MCP configCARDDAV_TOKENSet in your MCP configCARDDAV_ADDRESSBOOKSSet in your MCP configCARDDAV_MAX_CONTACTSSet in your MCP configCARDDAV_READ_ONLYSet in your MCP configCARDDAV_INSECURE_TLSSet in your MCP configCARDDAV_ALLOW_PLAINTEXTSet in your MCP configCARDDAV_ALLOW_TOOLSSet in your MCP configCARDDAV_DENY_TOOLSSet in your MCP configELICITATIONSet in your MCP configInstall with your client
claude mcp add carddav-address-books --env CARDDAV_URL=<YOUR_CARDDAV_URL> --env CARDDAV_USERNAME=<YOUR_CARDDAV_USERNAME> --env CARDDAV_PASSWORD=<YOUR_CARDDAV_PASSWORD> --env CARDDAV_TOKEN=<YOUR_CARDDAV_TOKEN> --env CARDDAV_ADDRESSBOOKS=<YOUR_CARDDAV_ADDRESSBOOKS> --env CARDDAV_MAX_CONTACTS=<YOUR_CARDDAV_MAX_CONTACTS> --env CARDDAV_READ_ONLY=<YOUR_CARDDAV_READ_ONLY> --env CARDDAV_INSECURE_TLS=<YOUR_CARDDAV_INSECURE_TLS> --env CARDDAV_ALLOW_PLAINTEXT=<YOUR_CARDDAV_ALLOW_PLAINTEXT> --env CARDDAV_ALLOW_TOOLS=<YOUR_CARDDAV_ALLOW_TOOLS> --env CARDDAV_DENY_TOOLS=<YOUR_CARDDAV_DENY_TOOLS> --env ELICITATION=<YOUR_ELICITATION> -- npx -y @ni-c/carddav-mcp@0.1.4
Run this in a terminal to add the server to Claude Code.
What this does
CardDAV address books exposes a set of tools to Claude over the Model Context Protocol. After you add it to claude_desktop_config.json (snippet above) and restart Claude Desktop, those tools become callable inside any conversation.
Requirements
This server needs the following environment variables to be set before it can run:
CARDDAV_URL CARDDAV_USERNAME CARDDAV_PASSWORD CARDDAV_TOKEN CARDDAV_ADDRESSBOOKS CARDDAV_MAX_CONTACTS CARDDAV_READ_ONLY CARDDAV_INSECURE_TLS CARDDAV_ALLOW_PLAINTEXT CARDDAV_ALLOW_TOOLS CARDDAV_DENY_TOOLS ELICITATION
Set these via the env object in your MCP config (see claude_desktop_config.json snippet above).
Frequently asked questions
How do I install CardDAV address books?
Run the Claude Code command in the install section to add CardDAV address books to Claude Code, or copy the ready-made config for your client from the install section on this page. Restart your client afterwards and the tools appear in your next conversation.
Which clients work with CardDAV address books?
This page carries setup and config for Claude Code, Claude Desktop, Cursor and VS Code. Any other MCP client that accepts a standard server config can connect to CardDAV address books as well.
Does CardDAV address books need an API key?
Yes. Before it can run, set these environment variables: CARDDAV_URL, CARDDAV_USERNAME, CARDDAV_PASSWORD, CARDDAV_TOKEN, CARDDAV_ADDRESSBOOKS, CARDDAV_MAX_CONTACTS, CARDDAV_READ_ONLY, CARDDAV_INSECURE_TLS, CARDDAV_ALLOW_PLAINTEXT, CARDDAV_ALLOW_TOOLS, CARDDAV_DENY_TOOLS, ELICITATION. They go in the env block of your MCP config.
Imported from the Official MCP Registry. The details above come from the registry entry; the maker can claim this listing to correct them, add docs, and see its traffic.
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