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How to connect Addressfinder to Claude

Connect Claude Web, Desktop and Cowork to Addressfinder MCP. Verify if 221b baker st is a real address, enrich contact with validated phone number, and more using natural language, with authentication handled for you.

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Addressfinder is a data quality platform for verifying addresses, emails, and phone numbers. It helps you ensure accurate customer and contact data every time.

17 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 Addressfinder account to Claude via Composio Connect, enabling it to verify if 221B Baker St is a real address, enrich contact with validated phone number, check if john@example.com is deliverable, 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 Addressfinder with

Claude CodeOpenAI Agents SDKClaude Agent SDKGrok BotCodexOpenClawHermesAtomic AgentGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAIPydantic AIAutoGen

Connecting Addressfinder to Claude Web, Desktop, and Cowork

Two ways to add the Composio connector. Pick whichever you prefer.

1. Add with one click

Click the button. Claude opens with the Composio connector filled in. Click Add, then go to step 2.

Add to Claude

Add manually

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

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

2. 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

3. Connect your Addressfinder account

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

For example, ask Claude to:

  • "Verify if 221B Baker St is a real address"
  • "Enrich contact with validated phone number"
  • "Check if john@example.com is deliverable"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Claude, and your Addressfinder account is ready to use.

What is the Addressfinder Claude Connector, and what's possible with it?

The Addressfinder MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Addressfinder account. It provides structured and secure access so your agent can perform Addressfinder operations on your behalf.

Troubleshooting

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

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

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

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

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

  • 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 Addressfinder.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the Addressfinder authorization link not work?

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

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

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

The Addressfinder connection can expire or lose permission.

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

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

Claude can manage the Addressfinder connection for you.

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

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

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

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If Addressfinder 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 Addressfinder.
TOOLS

Supported Tools

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

AU Address Autocomplete

Tool to perform interactive search of Australian addresses from the AddressFinder database.

Get AU Address Metadata

Tool to retrieve full metadata for an Australian address selected from the Address Autocomplete API.

AU Address Verification

Tool to verify Australian addresses against PAF/GNAF databases.

AU Location Autocomplete

Tool to perform interactive autocomplete search for Australian streets, suburbs, and states.

Get AU Location Metadata

Tool to retrieve comprehensive metadata for an Australian location (street, suburb, or state) selected from the Location Autocomplete API.

Email Verification API

Tool to verify email addresses including syntax validation, domain existence, and email account verification.

International Address Autocomplete

Tool to search for international addresses using autocomplete functionality.

Get International Address Metadata

Tool to retrieve full metadata for an international address selected from the Address Autocomplete API.

NZ Address Autocomplete

Tool to perform interactive search for New Zealand addresses.

Get NZ Address Metadata

Tool to retrieve full metadata for a NZ address including coordinates, census data, and postal details.

NZ Address Reverse Geocode

Tool to reverse geocode NZ addresses from GPS coordinates.

NZ Address Verification

Tool to verify New Zealand addresses against the Addressfinder database.

NZ Location Autocomplete

Tool to perform interactive search for New Zealand streets, suburbs, cities, and regions.

Get NZ Location Metadata

Tool to retrieve full metadata for a New Zealand location selected from the Location Autocomplete API.

NZ POI Autocomplete

Tool to perform interactive search for points of interest in New Zealand.

Get NZ POI Metadata

Tool to retrieve comprehensive metadata for New Zealand points of interest including coordinates and address details.

Phone Verification API

Tool to verify phone numbers through syntax, range checks, and network verification.

FRAMEWORKS

How to build Addressfinder MCP Agent with another framework

Claude Code logo

Claude Code

Use Addressfinder MCP with Claude Code

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Addressfinder MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Addressfinder MCP with Claude Agent SDK

Grok Bot logo

Grok Bot

Use Addressfinder MCP with Grok Bot

Codex logo

Codex

Use Addressfinder MCP with Codex

OpenClaw logo

OpenClaw

Use Addressfinder MCP with OpenClaw

Hermes logo

Hermes

Use Addressfinder MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Addressfinder MCP with Atomic Agent

Google ADK logo

Google ADK

Use Addressfinder MCP with Google ADK

LangChain logo

LangChain

Use Addressfinder MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Addressfinder MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Addressfinder MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Addressfinder MCP with LlamaIndex

CrewAI logo

CrewAI

Use Addressfinder MCP with CrewAI

Pydantic AI logo

Pydantic AI

Use Addressfinder MCP with Pydantic AI

AutoGen logo

AutoGen

Use Addressfinder MCP with AutoGen

FAQ

Frequently asked questions

With a standalone Addressfinder MCP server, the agents and LLMs can only access a fixed set of Addressfinder tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Addressfinder 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 Addressfinder tools.

Yes, absolutely. You can configure which Addressfinder 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 Addressfinder data and credentials are handled as safely as possible.

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