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Read and write CardDAV address books: contacts, groups and photos over the open standard
CardDAV address books is an MCP server entry in ChatHome Skills, sourced from Official MCP Registry and scored 78/100. As a Model Context Protocol server, it exposes tools that MCP-compatible LLM clients such as Claude, Cursor, and Copilot can call directly, extending an agent's reach beyond its built-in capabilities. ChatHome Skills discovered this entry through its daily ingest of official registries and GitHub discovery queries, and re-verifies repository facts, freshness signals, and install metadata on every run. The quality score weighs official-registry presence, a working install command, license clarity, GitHub star trajectory, and repository freshness — the full formula is on the Sources page. The install command above is ready to copy. Review the last-pushed date and repository status before adding CardDAV address books to a production agent workflow; the snapshot facts below are point-in-time values from the most recent ingest.
npx -y @ni-c/carddav-mcp@0.1.4Review the upstream source before running this command.
{
"_meta": {
"io.modelcontextprotocol.registry/official": {
"status": "active",
"isLatest": true,
"updatedAt": "2026-10-22T20:36:05.481728Z",
"publishedAt": "2026-10-22T20:36:05.481728Z",
"statusChangedAt": "2026-10-22T20:36:05.481728Z"
}
},
"server": {
"name": "io.github.ni-c/carddav-mcp",
"icons": [
{
"src": "https://carddav-mcp.ni-c.de/icon-512.png",
"sizes": [
"512x512"
],
"mimeType": "image/png"
},
{
"src": "https://carddav-mcp.ni-c.de/favicon.svg",
"sizes": [
"any"
],
"mimeType": "image/svg+xml"
}
],
"title": "CardDAV address books",
"$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
"version": "0.1.4",
"packages": [
{
"version": "0.1.4",
"transport": {
"type": "stdio"
},
"identifier": "@ni-c/carddav-mcp",
"registryType": "npm",
"environmentVariables": [
{
"name": "CARDDAV_URL",
"format": "string",
"isRequired": true,
"description": "Root of the CardDAV server, e.g. https://dav.example.net. An address book collection URL also works."
},
{
"name": "CARDDAV_USERNAME",
"format": "string",
"description": "Account name. Most hosted services want an app-specific password with it."
},
{
"name": "CARDDAV_PASSWORD",
"format": "string",
"isSecret": true,
"description": "Password or app-specific password. Deleted from the environment once read."
},
{
"name": "CARDDAV_TOKEN",
"format": "string",
"isSecret": true,
"description": "Bearer token, as an alternative to username and password. Not both."
},
{
"name": "CARDDAV_ADDRESSBOOKS",
"format": "string",
"description": "Comma-separated address books this server may touch, by path or final path segment. Default: all of them."
},
{
"name": "CARDDAV_MAX_CONTACTS",
"format": "number",
"description": "Contacts a listing returns by default, 1 to 500 (default: 100)"
},
{
"name": "CARDDAV_READ_ONLY",
"format": "boolean",
"description": "Set to true to register only the read tools (default: false)"
},
{
"name": "CARDDAV_INSECURE_TLS",
"format": "boolean",
"description": "Set to true to accept a self-signed certificate on the configured host only (default: false)"
},
{
"name": "CARDDAV_ALLOW_PLAINTEXT",
"format": "boolean",
"description": "Set to true to allow a plain http:// URL to a host that is not loopback, which sends the credentials and every contact unencrypted (default: false)"
},
{
"name": "CARDDAV_ALLOW_TOOLS",
"format": "string",
"description": "Comma-separated tool names or list_* prefixes to register; 'essential' selects a curated preset (default: all tools)"
},
{
"name": "CARDDAV_DENY_TOOLS",
"format": "string",
"description": "Comma-separated tool names or list_* prefixes to remove from whatever the allow list left"
},
{
"name": "ELICITATION",
"format": "boolean",
"description": "Deliberately unprefixed, and reaches every MCP server in the environment. Set to false to make guarded tools use the two-call token instead of a dialog (default: true)"
}
]
},
{
"transport": {
"type": "stdio"
},
"identifier": "ghcr.io/ni-c/carddav-mcp:0.1.4",
"registryType": "oci",
"environmentVariables": [
{
"name": "CARDDAV_URL",
"format": "string",
"isRequired": true,
"description": "Root of the CardDAV server, e.g. https://dav.example.net. An address book collection URL also works."
},
{
"name": "CARDDAV_USERNAME",
"format": "string",
"description": "Account name. Most hosted services want an app-specific password with it."
},
{
"name": "CARDDAV_PASSWORD",
"format": "string",
"isSecret": true,
"description": "Password or app-specific password. Deleted from the environment once read."
},
{
"name": "CARDDAV_TOKEN",
"format": "string",
"isSecret": true,
"description": "Bearer token, as an alternative to username and password. Not both."
},
{
"name": "CARDDAV_ADDRESSBOOKS",
"format": "string",
"description": "Comma-separated address books this server may touch, by path or final path segment. Default: all of them."
},
{
"name": "CARDDAV_MAX_CONTACTS",
"format": "number",
"description": "Contacts a listing returns by default, 1 to 500 (default: 100)"
},
{
"name": "CARDDAV_READ_ONLY",
"format": "boolean",
"description": "Set to true to register only the read tools (default: false)"
},
{
"name": "CARDDAV_INSECURE_TLS",
"format": "boolean",
"description": "Set to true to accept a self-signed certificate on the configured host only (default: false)"
},
{
"name": "CARDDAV_ALLOW_PLAINTEXT",
"format": "boolean",
"description": "Set to true to allow a plain http:// URL to a host that is not loopback, which sends the credentials and every contact unencrypted (default: false)"
},
{
"name": "CARDDAV_ALLOW_TOOLS",
"format": "string",
"description": "Comma-separated tool names or list_* prefixes to register; 'essential' selects a curated preset (default: all tools)"
},
{
"name": "CARDDAV_DENY_TOOLS",
"format": "string",
"description": "Comma-separated tool names or list_* prefixes to remove from whatever the allow list left"
},
{
"name": "ELICITATION",
"format": "boolean",
"description": "Deliberately unprefixed, and reaches every MCP server in the environment. Set to false to make guarded tools use the two-call token instead of a dialog (default: true)"
}
]
}
],
"repository": {
"url": "https://github.com/ni-c/carddav-mcp",
"source": "github"
},
"websiteUrl": "https://carddav-mcp.ni-c.de",
"description": "Read and write CardDAV address books: contacts, groups and photos over the open standard"
}
}