X (Twitter)LinkedInGitHubDiscordYouTube

How to connect Addresszen to Claude

Connect Claude Web, Desktop and Cowork to Addresszen MCP. Verify if your addresszen api key is valid, autocomplete a shipping address for new york, and more using natural language, with authentication handled for you.

Get started for freeGet a demo
Addresszen logoAddresszen
Api Key

Addresszen is a real-time address autocomplete and verification service. It helps capture accurate, deliverable addresses with instant suggestions and validation.

2 Tools

Introduction

Claude is Anthropic's AI assistant, available on the web, in the desktop app, and on mobile. Cowork is its agent for knowledge work, and it runs on all of those surfaces too. Connected to your apps, Claude can work with your files and services to accomplish complex tasks on your behalf.

This guide walks you through the easiest and most secure way to connect your Addresszen account to Claude 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.

Setup is the same on Claude Web, Desktop, and Cowork, and you only need to do it once. The connector is tied to your account, so it's available in all three.

Also integrate Addresszen with

OpenAI Agents SDKClaude Agent SDKClaude CodeCodexOpenClawHermesGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAIPydantic AIAutoGen

Connecting Addresszen to Claude Web, Desktop, and 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 Web, Desktop, and Cowork

4. Connect your Addresszen account

Back in Claude, ask it to connect to Addresszen or give it any Addresszen-related task.

For example, ask Claude 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 Claude, and your Addresszen account is ready to use.

What is the Addresszen Claude Connector, 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.

Troubleshooting

1. Why does Claude not use the Composio connector for Addresszen?

The connector can show as connected, but Claude must use it in each Addresszen conversation.

  • Click + at the lower left of the chat, or type /.
  • Hover Connectors.
  • Turn on Composio.
  • Ask Claude to connect to Addresszen again.

2. Why does Claude show an MCP server error before Addresszen connects?

Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for Addresszen.

  • Check that the connector URL is https://connect.composio.dev/mcp.
  • Connectors run from Anthropic's cloud, so your device network is usually not the problem.
  • Add the connector again from Customize > Connectors, then ask Claude to connect Addresszen.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the Addresszen authorization link not work?

The Composio connector is one server. Your Addresszen account connects separately when Claude asks for it.

  • If the browser does not open, or the link expires, ask Claude to retry the Addresszen connection.
  • Composio creates a fresh Addresszen authorization link.
  • Open that link in your browser and finish the Addresszen sign-in.

4. Why do Addresszen actions fail after they worked before?

The Addresszen connection can expire or lose permission.

  • Ask Claude to inspect the Addresszen connection.
  • If the connection is unhealthy, disconnect it when Claude prompts you.
  • Reconnect the Addresszen account and retry the action.
  • If Claude shows a permission prompt, approve it before Claude changes data in Addresszen.
  • If the action still fails with a permission error, check that the connected account has that permission in Addresszen itself.

5. How do I switch to a different Addresszen account?

Claude can manage the Addresszen connection for you.

  • Ask Claude to disconnect or delete the current Addresszen account.
  • Ask Claude to connect Addresszen again.
  • Open the new Composio authorization link for Addresszen.
  • Sign in with the other Addresszen account in the browser.
  • After the account connects, ask Claude to retry the Addresszen task.

6. Why is my Addresszen connection missing in Claude Desktop or on a Team plan?

The connector belongs to your Claude account, so your Addresszen connection works in Claude Web, Desktop, and Cowork.

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If Addresszen tools still do not appear, click ⋮, disconnect, remove the connector, and add it again.
  • On Team or Enterprise, an Owner or Primary Owner must enable the connector before you can connect Addresszen.
TOOLS

Supported Tools

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

Key Availability

Tool to get public information on an API key, including whether it is currently usable.

Resolve Address USA

Tool to resolve an address autocompletion by its address ID and return the full address in US format.

FRAMEWORKS

How to build Addresszen MCP Agent with another framework

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Addresszen MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Addresszen MCP with Claude Agent SDK

Claude Code logo

Claude Code

Use Addresszen MCP with Claude Code

Codex logo

Codex

Use Addresszen MCP with Codex

OpenClaw logo

OpenClaw

Use Addresszen MCP with OpenClaw

Hermes logo

Hermes

Use Addresszen MCP with Hermes

Google ADK logo

Google ADK

Use Addresszen MCP with Google ADK

LangChain logo

LangChain

Use Addresszen MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Addresszen MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Addresszen MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Addresszen MCP with LlamaIndex

CrewAI logo

CrewAI

Use Addresszen MCP with CrewAI

Pydantic AI logo

Pydantic AI

Use Addresszen MCP with Pydantic AI

AutoGen logo

AutoGen

Use Addresszen MCP with AutoGen

FAQ

Frequently asked questions

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.

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.

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.

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.

Start with Addresszen.It takes 30 seconds.

Managed auth, hosted MCP servers, and every Addresszen tool your agent needs.Free to start.

Start building