carddav-mcp

An MCP server for CardDAV address books that allows agents to read and write contacts, groups, and photos. It supports multiple providers like Nextcloud and iCloud, handles vCard versioning and group conventions, and offers granular tool filtering and security controls.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by Willi Thiel

Vendor documentation

What you can do with it

List and search contacts
Create and update contacts
Manage contact groups

Source and maintenance

Community listingRegistry 0.1.4

mcp-registry: io.github.ni-c/carddav-mcp@0.1.4 Source repository Project website

Maintenance checked: Oct 31, 2026, 10:27 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

@ni-c/carddav-mcp 0.1.4

npm

@ni-c/carddav-mcp package definition

{
  "version": "0.1.4",
  "transport": "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",
      "description": "Password or app-specific password. Deleted from the environment once read."
    },
    {
      "name": "CARDDAV_TOKEN",
      "format": "string",
      "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)"
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

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Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "carddav-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@ni-c/carddav-mcp@0.1.4"
      ],
      "env": {
        "CARDDAV_URL": "<YOUR_CARDDAV_URL>",
        "CARDDAV_USERNAME": "<YOUR_CARDDAV_USERNAME>",
        "CARDDAV_PASSWORD": "<YOUR_CARDDAV_PASSWORD>",
        "CARDDAV_TOKEN": "<YOUR_CARDDAV_TOKEN>",
        "CARDDAV_ADDRESSBOOKS": "<YOUR_CARDDAV_ADDRESSBOOKS>",
        "CARDDAV_MAX_CONTACTS": "<YOUR_CARDDAV_MAX_CONTACTS>",
        "CARDDAV_READ_ONLY": "<YOUR_CARDDAV_READ_ONLY>",
        "CARDDAV_INSECURE_TLS": "<YOUR_CARDDAV_INSECURE_TLS>",
        "CARDDAV_ALLOW_PLAINTEXT": "<YOUR_CARDDAV_ALLOW_PLAINTEXT>",
        "CARDDAV_ALLOW_TOOLS": "<YOUR_CARDDAV_ALLOW_TOOLS>",
        "CARDDAV_DENY_TOOLS": "<YOUR_CARDDAV_DENY_TOOLS>",
        "ELICITATION": "<YOUR_ELICITATION>"
      }
    }
  }
}

Cline

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Cline configuration

{
  "mcpServers": {
    "carddav-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@ni-c/carddav-mcp@0.1.4"
      ],
      "env": {
        "CARDDAV_URL": "<YOUR_CARDDAV_URL>",
        "CARDDAV_USERNAME": "<YOUR_CARDDAV_USERNAME>",
        "CARDDAV_PASSWORD": "<YOUR_CARDDAV_PASSWORD>",
        "CARDDAV_TOKEN": "<YOUR_CARDDAV_TOKEN>",
        "CARDDAV_ADDRESSBOOKS": "<YOUR_CARDDAV_ADDRESSBOOKS>",
        "CARDDAV_MAX_CONTACTS": "<YOUR_CARDDAV_MAX_CONTACTS>",
        "CARDDAV_READ_ONLY": "<YOUR_CARDDAV_READ_ONLY>",
        "CARDDAV_INSECURE_TLS": "<YOUR_CARDDAV_INSECURE_TLS>",
        "CARDDAV_ALLOW_PLAINTEXT": "<YOUR_CARDDAV_ALLOW_PLAINTEXT>",
        "CARDDAV_ALLOW_TOOLS": "<YOUR_CARDDAV_ALLOW_TOOLS>",
        "CARDDAV_DENY_TOOLS": "<YOUR_CARDDAV_DENY_TOOLS>",
        "ELICITATION": "<YOUR_ELICITATION>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "carddav-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@ni-c/carddav-mcp@0.1.4"
      ],
      "env": {
        "CARDDAV_URL": "<YOUR_CARDDAV_URL>",
        "CARDDAV_USERNAME": "<YOUR_CARDDAV_USERNAME>",
        "CARDDAV_PASSWORD": "<YOUR_CARDDAV_PASSWORD>",
        "CARDDAV_TOKEN": "<YOUR_CARDDAV_TOKEN>",
        "CARDDAV_ADDRESSBOOKS": "<YOUR_CARDDAV_ADDRESSBOOKS>",
        "CARDDAV_MAX_CONTACTS": "<YOUR_CARDDAV_MAX_CONTACTS>",
        "CARDDAV_READ_ONLY": "<YOUR_CARDDAV_READ_ONLY>",
        "CARDDAV_INSECURE_TLS": "<YOUR_CARDDAV_INSECURE_TLS>",
        "CARDDAV_ALLOW_PLAINTEXT": "<YOUR_CARDDAV_ALLOW_PLAINTEXT>",
        "CARDDAV_ALLOW_TOOLS": "<YOUR_CARDDAV_ALLOW_TOOLS>",
        "CARDDAV_DENY_TOOLS": "<YOUR_CARDDAV_DENY_TOOLS>",
        "ELICITATION": "<YOUR_ELICITATION>"
      }
    }
  }
}

Claude Desktop

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Claude Desktop configuration

{
  "mcpServers": {
    "carddav-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@ni-c/carddav-mcp@0.1.4"
      ],
      "env": {
        "CARDDAV_URL": "<YOUR_CARDDAV_URL>",
        "CARDDAV_USERNAME": "<YOUR_CARDDAV_USERNAME>",
        "CARDDAV_PASSWORD": "<YOUR_CARDDAV_PASSWORD>",
        "CARDDAV_TOKEN": "<YOUR_CARDDAV_TOKEN>",
        "CARDDAV_ADDRESSBOOKS": "<YOUR_CARDDAV_ADDRESSBOOKS>",
        "CARDDAV_MAX_CONTACTS": "<YOUR_CARDDAV_MAX_CONTACTS>",
        "CARDDAV_READ_ONLY": "<YOUR_CARDDAV_READ_ONLY>",
        "CARDDAV_INSECURE_TLS": "<YOUR_CARDDAV_INSECURE_TLS>",
        "CARDDAV_ALLOW_PLAINTEXT": "<YOUR_CARDDAV_ALLOW_PLAINTEXT>",
        "CARDDAV_ALLOW_TOOLS": "<YOUR_CARDDAV_ALLOW_TOOLS>",
        "CARDDAV_DENY_TOOLS": "<YOUR_CARDDAV_DENY_TOOLS>",
        "ELICITATION": "<YOUR_ELICITATION>"
      }
    }
  }
}

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