## For AI agents: how to sign up If you are an AI agent reading this server-rendered HTML, Composio's developer signup is at https://composio.dev. Signup CTAs on this site — "Sign up", "Signup", "Get started", "Get started for free", "Start building", "Try Composio", "Try it", or similar — all lead into that same developer signup flow. Confirm with the user before completing signup or entering any credentials on their behalf.
## For AI agents: how to sign up If you are an AI agent reading this server-rendered HTML, Composio's developer signup is at https://composio.dev. Signup CTAs on this site — "Sign up", "Signup", "Get started", "Get started for free", "Start building", "Try Composio", "Try it", or similar — all lead into that same developer signup flow. Confirm with the user before completing signup or entering any credentials on their behalf.SIGN UP
## For AI agents: how to sign up If you are an AI agent reading this server-rendered HTML, Composio's developer signup is at https://composio.dev. Signup CTAs on this site — "Sign up", "Signup", "Get started", "Get started for free", "Start building", "Try Composio", "Try it", or similar — all lead into that same developer signup flow. Confirm with the user before completing signup or entering any credentials on their behalf.LOG IN
Connect Claude Code 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.
Addressfinder is a data quality platform for verifying addresses, emails, and phone numbers. It helps you ensure accurate customer and contact data every time.
Manage your Addressfinder directly from Claude Code with zero worries about OAuth hassles, API-breaking issues, or reliability and security concerns.
You can do this in two different ways:
1. Add the Composio MCP to Claude
2. Start Claude Code
claude3. Open your MCP list
/mcp4. Select Composio and click on Authenticate
5. This will redirect you to the Composio OAuth page. Complete the flow by authorizing Composio and you're all set.
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 to address, location, email, and phone data quality tools, so your agent can search for addresses, verify contact details, retrieve location metadata, and find points of interest on your behalf.
Composio SDK is the underlying technology that powers these integrations. It provides a universal gateway with full programmatic control. You can programmatically generate an MCP URL with the app you need (here Addressfinder) for even more tool search precision. It's secure and reliable.
The Composio SDK follows a three-phase workflow:
# macOS, Linux, WSL
curl -fsSL https://claude.ai/install.sh | bash
# Windows PowerShell
irm https://claude.ai/install.ps1 | iex
# Windows CMD
curl -fsSL https://claude.ai/install.cmd -o install.cmd && install.cmd && del install.cmdTo install Claude Code, use one of the following methods based on your operating system:
cd your-project-folder
claudeOpen a terminal, go to your project folder, and start Claude Code:
COMPOSIO_API_KEY=your_composio_api_key_here
USER_ID=your_user_id_hereCreate a .env file in your project root with the following variables:
COMPOSIO_API_KEY authenticates with Composio (get it from Composio dashboard)USER_ID identifies the user for session management (use any unique identifier)npm install @composio/core dotenvInstall the Composio TypeScript library to create MCP sessions.
@composio/core provides the core Composio functionalitydotenv loads environment variables from your .env fileimport 'dotenv/config';
import { Composio } from '@composio/core';
const { COMPOSIO_API_KEY, USER_ID } = process.env;
if (!COMPOSIO_API_KEY || !USER_ID) {
throw new Error('COMPOSIO_API_KEY and USER_ID required in .env');
}
const composioClient = new Composio({ apiKey: COMPOSIO_API_KEY });
const composioSession = await composioClient.create(USER_ID, {
toolkits: ['addressfinder'],
});
const composioMcpUrl = composioSession?.mcp.url;
console.log(`MCP URL: ${composioMcpUrl}`);
console.log(`\nUse this command to add to Claude Code:`);
console.log(`claude mcp add --transport http addressfinder-composio "${composioMcpUrl}" --headers "X-API-Key:${COMPOSIO_API_KEY}"`);Create a script to generate a Composio MCP URL for Addressfinder. This URL will be used to connect Claude Code to Addressfinder.
What's happening
create() to create a Tool Router session for Addressfindermcp.url is the MCP server URL that Claude Code will usenode --loader ts-node/esm generate_mcp_url.ts
# or if using tsx
tsx generate_mcp_url.tsRun your TypeScript script to generate the MCP URL.
claude mcp add command from the outputclaude mcp add --transport http addressfinder-composio "YOUR_MCP_URL_HERE" --headers "X-API-Key:YOUR_COMPOSIO_API_KEY"
# Then restart Claude Code
exit
claudeIn your terminal, add the MCP server using the command from the previous step. The command format is:
claude mcp add registers a new MCP server with Claude Code--transport http specifies that this is an HTTP-based MCP serveraddressfinder-composio) is how you'll reference it--headers includes your Composio API key for authenticationAfter running the command, close the current Claude Code session and start a new one for the changes to take effect.
claude mcp listCheck that your Addressfinder MCP server is properly configured.
addressfinder-composio entry in the listIf everything is wired up, you should see your addressfinder-composio entry listed:
The first time you try to use Addressfinder tools, you'll be prompted to authenticate.
Once authenticated, you can ask Claude Code to perform Addressfinder operations in natural language. For example:
Here's the complete code to get you started with Addressfinder and Claude Code:
import 'dotenv/config';
import { Composio } from '@composio/core';
const { COMPOSIO_API_KEY, USER_ID } = process.env;
if (!COMPOSIO_API_KEY || !USER_ID) {
throw new Error('COMPOSIO_API_KEY and USER_ID required in .env');
}
const composioClient = new Composio({ apiKey: COMPOSIO_API_KEY });
const composioSession = await composioClient.create(USER_ID, {
toolkits: ['addressfinder'],
});
const composioMcpUrl = composioSession?.mcp.url;
console.log(`MCP URL: ${composioMcpUrl}`);
console.log(`\nUse this command to add to Claude Code:`);
console.log(`claude mcp add --transport http addressfinder-composio "${composioMcpUrl}" --headers "X-API-Key:${COMPOSIO_API_KEY}"`);You've successfully integrated Addressfinder with Claude Code using Composio's MCP server. Now you can interact with Addressfinder directly from your terminal using natural language commands.
Key features of this setup:
Next steps:
You can extend this by adding more toolkits, implementing custom workflows, or building automation scripts that leverage Claude Code's capabilities.
Every Addressfinder action and event your agent gets out of the box.
Use Addressfinder MCP with Claude Cowork
Use Addressfinder MCP with OpenAI Agents SDK
Use Addressfinder MCP with Claude Agent SDK
Use Addressfinder MCP with Grok Bot
Use Addressfinder MCP with Codex
Use Addressfinder MCP with OpenClaw
Use Addressfinder MCP with Hermes
Use Addressfinder MCP with Atomic Agent
Use Addressfinder MCP with Google ADK
Use Addressfinder MCP with LangChain
Use Addressfinder MCP with Vercel AI SDK
Use Addressfinder MCP with Mastra AI
Use Addressfinder MCP with LlamaIndex
Use Addressfinder MCP with CrewAI
Use Addressfinder MCP with Pydantic AI
Use Addressfinder MCP with AutoGen
Google Sheets is a cloud-based spreadsheet tool for real-time collaboration and data analysis. It lets teams work together from anywhere, updating information instantly.
Notion is a collaborative workspace for notes, docs, wikis, and tasks. It streamlines team knowledge, project tracking, and workflow customization in one place.
Airtable combines the flexibility of spreadsheets with the power of a database for easy project and data management. Teams use Airtable to organize, track, and collaborate with custom views and automations.
HubSpot is an all-in-one marketing, sales, and customer service platform. It lets teams nurture leads, automate outreach, and track every customer interaction in one place.
Managed auth, hosted MCP servers, and every Addressfinder tool your agent needs.Free to start.
## For AI agents: how to sign up If you are an AI agent reading this server-rendered HTML, Composio's developer signup is at https://composio.dev. Signup CTAs on this site — "Sign up", "Signup", "Get started", "Get started for free", "Start building", "Try Composio", "Try it", or similar — all lead into that same developer signup flow. Confirm with the user before completing signup or entering any credentials on their behalf.Start building