How to connect Addresszen to Claude Cowork

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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 Addresszen account to Cowork via Composio Connect, enabling it to verify if your AddressZen API key is valid, autocomplete a shipping address for New York, get full address details from suggestion ID, and more such actions on your behalf without compromising your account security.

Also integrate Addresszen with

Connecting Addresszen 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 Addresszen account

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

For example, ask Cowork to:

  • "Verify if your AddressZen API key is valid"
  • "Autocomplete a shipping address for New York"
  • "Get full address details from suggestion ID"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Cowork, and your Addresszen 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 Addresszen through MCP without you sharing account credentials directly with the agent.

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

The Addresszen MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Addresszen account. It provides structured and secure access to real-time address autocomplete and verification services, so your agent can suggest accurate addresses, validate API keys, and resolve complete address details on your behalf.

  • Instant address autocomplete and suggestions: Enable your agent to quickly provide users with accurate address suggestions as they type, reducing input errors and saving time.
  • Address resolution and formatting: Let your agent resolve address suggestion IDs into full, deliverable US-format addresses for shipping, billing, or form completion.
  • API key validation and monitoring: Easily verify whether your Addresszen API key is active and usable before making further requests, ensuring seamless integrations.
  • Seamless address validation in workflows: Automate the process of checking and completing addresses, so your agent can support onboarding, checkout, or CRM data entry without manual review.

Supported Tools & Triggers

Tools
Key AvailabilityTool to get public information on an api key, including whether it is currently usable.
Resolve Address USATool to resolve an address autocompletion by its address id and return the full address in us format.

How to build Addresszen MCP Agent with another framework

FAQ

What are the differences in Tool Router MCP and Addresszen MCP?

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

Can I use Tool Router MCP with Claude Cowork?

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 Addresszen tools.

Can I manage the permissions and scopes for Addresszen while using Tool Router?

Yes, absolutely. You can configure which Addresszen 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.

How safe is my data with Composio Tool Router?

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 Addresszen data and credentials are handled as safely as possible.

Used by agents from

Context
Letta
glean
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Context
Letta
glean
HubSpot
Agent.ai
Altera
DataStax
Entelligence
Rolai
Context
Letta
glean
HubSpot
Agent.ai
Altera
DataStax
Entelligence
Rolai

Never worry about agent reliability

We handle tool reliability, observability, and security so you never have to second-guess an agent action.