How to connect Contacts+ to Claude Cowork

Cowork is Anthropic's AI agent for knowledge work. Think of it as Claude Code for everything else. It works autonomously with your computer, local files, and applications to accomplish complex tasks. This guide walks you through the easiest and most secure way to connect your Contacts+ account to Cowork via Composio Connect, enabling it to find contacts tagged as investors, list customers missing phone numbers, show recently updated contact records, and more such actions on your behalf without compromising your account security.

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Contacts+ logoContacts+
Oauth2

Contacts+ is a contact management service for personal account, contact, and tag data. It helps keep address books organized, searchable, and easier to maintain across workflows.

13 Tools

Introduction

Cowork is Anthropic's AI agent for knowledge work. Think of it as Claude Code for everything else. It works autonomously with your computer, local files, and applications to accomplish complex tasks.

This guide walks you through the easiest and most secure way to connect your Contacts+ account to Cowork via Composio Connect, enabling it to find contacts tagged as investors, list customers missing phone numbers, show recently updated contact records, and more such actions on your behalf without compromising your account security.

Also integrate Contacts+ with

OpenAI Agents SDKClaude Agent SDKClaude CodeCodexOpenClawHermesCLIGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAI

Connecting Contacts+ to Claude Cowork

1. Open Customize

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

2. Add the Composio MCP server

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

3. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Cowork

4. Connect your Contacts+ account

Back in Cowork, ask the agent to connect to Contacts+ or give it any Contacts+-related task.

For example, ask Cowork to:

  • "Find contacts tagged as investors"
  • "List customers missing phone numbers"
  • "Show recently updated contact records"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Cowork, and your Contacts+ account is ready to use.

What is Claude Cowork?

Claude Cowork is Anthropic's agent for general knowledge work. It can use your computer, files, and connected applications to complete longer-running tasks across your work tools.

With Composio Connect, Cowork can securely access apps like Contacts+ through MCP without you sharing account credentials directly with the agent.

What is the Contacts+ MCP server, and what's possible with it?

The Contacts+ MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Contacts+ account. It provides structured and secure access to your account, contacts, and tags, so your agent can search, create, update, organize, and delete contacts on your behalf.

  • Contact search and retrieval: Have your agent search your address book by names, details, or tags and fetch complete contact records.
  • Contact creation and updates: Let the agent create new contacts with structured profile details or update existing contact information.
  • Tag organization: Direct your agent to create, rename, list, or delete tags and apply or remove them across your contacts.
  • Contact cleanup: Instruct your agent to find outdated entries and delete contacts you no longer need.
  • Account overview: Have your agent retrieve profile details for your connected Contacts+ account when it needs account context.
TOOLS

Supported Tools

Every Contacts+ action and event your agent gets out of the box.

Create Contact

Create a personal contact with structured profile data in the connected Contacts+ address book.

Create Tag

Create a personal Contacts+ tag, or return the existing tag when that name already exists.

Delete Contact

Delete one personal contact using its current etag for concurrency protection.

Delete Tag

Delete one personal tag using its current canonical etag.

Get Account

Return profile details for the authenticated Contacts+ personal account.

Get Contacts

Fetch current full records for one or more personal contacts by ID, including etags needed for safe updates and deletes.

Get Tags

Fetch current records for one or more personal tags by ID, including canonical etags needed for safe updates and deletes.

List Contacts

Return one cursor-controlled page of personal contacts from the connected Contacts+ address book.

List Tags

Return one cursor-controlled page of personal Contacts+ tags.

Search Contacts

Search personal contacts by full text or Contacts+ advanced query syntax, optionally restricted to tag IDs.

Update Contact

Replace the desired data for a personal contact using its current etag and strict optimistic concurrency by default.

Update Contact Tags

Add and/or remove personal tags across one or more personal contacts in a single operation.

Update Tag

Rename a personal tag using its current canonical etag from GET_TAGS.

FRAMEWORKS

How to build Contacts+ MCP Agent with another framework

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Contacts+ MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Contacts+ MCP with Claude Agent SDK

Claude Code logo

Claude Code

Use Contacts+ MCP with Claude Code

Codex logo

Codex

Use Contacts+ MCP with Codex

OpenClaw logo

OpenClaw

Use Contacts+ MCP with OpenClaw

Hermes logo

Hermes

Use Contacts+ MCP with Hermes

CLI logo

CLI

Use Contacts+ MCP with CLI

Google ADK logo

Google ADK

Use Contacts+ MCP with Google ADK

LangChain logo

LangChain

Use Contacts+ MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Contacts+ MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Contacts+ MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Contacts+ MCP with LlamaIndex

CrewAI logo

CrewAI

Use Contacts+ MCP with CrewAI

FAQ

Frequently asked questions

With a standalone Contacts+ MCP server, the agents and LLMs can only access a fixed set of Contacts+ tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Contacts+ and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Claude Cowork fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Contacts+ tools.

Yes, absolutely. You can configure which Contacts+ scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Contacts+ data and credentials are handled as safely as possible.

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