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How to integrate Abstract MCP with Claude Code

Connect Claude Code to Abstract MCP. Check if this iban is valid, assess risk score for this email, and more using natural language, with authentication handled for you.

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Api Key

Abstract provides a suite of APIs for automating data validation and enrichment tasks. It helps developers streamline workflows and ensure data quality with minimal effort.

3 Tools

Introduction

Manage your Abstract 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. Via Composio Connect - Direct and easiest approach
  2. Via Composio SDK - Programmatic approach with more control

Also integrate Abstract with

Claude CoworkOpenAI Agents SDKClaude Agent SDKCodexOpenClawHermesAtomic AgentGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAIPydantic AIAutoGen

Why use Composio?

  • Only one MCP URL to connect multiple apps with Claude Code with zero auth hassles.
  • Programmatic tool calling allows LLMs to write its code in a remote workbench to handle complex tool chaining. Reduces to-and-fro with LLMs for frequent tool calling.
  • Handling Large tool responses out of LLM context to minimize context rot.
  • Dynamic just-in-time access to 20,000 tools across 1500+ other Apps for cross-app workflows. It loads the tools you need, so LLMs aren't overwhelmed by tools you don't need.

Connecting Abstract to Claude Code using Composio

1. Add the Composio MCP to Claude

Terminal

2. Start Claude Code

bash
claude

3. Open your MCP list

bash
/mcp

4. Select Composio and click on Authenticate

Select Composio and click Authenticate

5. This will redirect you to the Composio OAuth page. Complete the flow by authorizing Composio and you're all set.

Composio OAuth authorization page
Composio authorization complete
Ask Claude to connect to your account and authenticate via the link

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

The Abstract MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Abstract account. It provides structured and secure access to email validation, VAT category data, and IBAN validation, so your agent can validate email addresses, assess email deliverability and quality, retrieve country-specific VAT categories, and validate IBANs on your behalf.

  • Email address validation: Have your agent check whether an email address is valid before you use it.
  • Email quality assessment: Let the agent assess the deliverability and quality of an email address.
  • Country-specific VAT categories: Direct your agent to retrieve standard, reduced, and special VAT rate categories for a selected country.
  • IBAN validation: Instruct your agent to validate an IBAN's format and country code.

Connecting Abstract via Composio SDK

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 Abstract) for even more tool search precision. It's secure and reliable.

How the Composio SDK works

The Composio SDK follows a three-phase workflow:

  1. Discovery: Searches for tools matching your task and returns relevant toolkits with their details.
  2. Authentication: Checks for active connections. If missing, creates an auth config and returns a connection URL via Auth Link.
  3. Execution: Executes the action using the authenticated connection.

Step-by-step Guide

Step by step10 STEPS
1

Prerequisites

Before starting, make sure you have:
  • Claude Pro, Max, or API billing enabled Anthropic account
  • Composio API Key
  • A Abstract account
  • Basic knowledge of Python or TypeScript
2

Install Claude Code

bash
# 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.cmd

To install Claude Code, use one of the following methods based on your operating system:

3

Set up Claude Code

bash
cd your-project-folder
claude

Open a terminal, go to your project folder, and start Claude Code:

  • Claude Code will open in your terminal
  • Follow the prompts to sign in with your Anthropic account
  • Complete the authentication flow
  • Once authenticated, you can start using Claude Code
Claude Code initial setup showing sign-in prompt
Claude Code terminal after successful login
4

Set up environment variables

bash
COMPOSIO_API_KEY=your_composio_api_key_here
USER_ID=your_user_id_here

Create 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)
5

Install Composio library

npm install @composio/core dotenv

Install the Composio TypeScript library to create MCP sessions.

  • @composio/core provides the core Composio functionality
  • dotenv loads environment variables from your .env file
6

Generate Composio MCP URL

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: ['abstract'],
});

const composioMcpUrl = composioSession?.mcp.url;

console.log(`MCP URL: ${composioMcpUrl}`);
console.log(`\nUse this command to add to Claude Code:`);
console.log(`claude mcp add --transport http abstract-composio "${composioMcpUrl}" --headers "X-API-Key:${COMPOSIO_API_KEY}"`);

Create a script to generate a Composio MCP URL for Abstract. This URL will be used to connect Claude Code to Abstract.

What's happening
  • We import the Composio client and load environment variables
  • Create a Composio instance with your API key
  • Call create() to create a Tool Router session for Abstract
  • The returned mcp.url is the MCP server URL that Claude Code will use
  • The script prints this URL so you can copy it
7

Run the script and copy the MCP URL

node --loader ts-node/esm generate_mcp_url.ts
# or if using tsx
tsx generate_mcp_url.ts

Run your TypeScript script to generate the MCP URL.

  • The script connects to Composio and creates a Tool Router session
  • It prints the MCP URL and the exact command you need to run
  • Copy the entire claude mcp add command from the output
8

Add Abstract MCP to Claude Code

bash
claude mcp add --transport http abstract-composio "YOUR_MCP_URL_HERE" --headers "X-API-Key:YOUR_COMPOSIO_API_KEY"

# Then restart Claude Code
exit
claude

In 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 server
  • The server name (abstract-composio) is how you'll reference it
  • The URL points to your Composio Tool Router session
  • --headers includes your Composio API key for authentication

After running the command, close the current Claude Code session and start a new one for the changes to take effect.

9

Verify the installation

bash
claude mcp list

Check that your Abstract MCP server is properly configured.

  • This command lists all MCP servers registered with Claude Code
  • You should see your abstract-composio entry in the list
  • This confirms that Claude Code can now access Abstract tools

If everything is wired up, you should see your abstract-composio entry listed:

Claude Code MCP list showing the toolkit MCP server
10

Authenticate Abstract

The first time you try to use Abstract tools, you'll be prompted to authenticate.

  • Claude Code will detect that you need to authenticate with Abstract
  • It will show you an authentication link
  • Open the link in your browser (or copy/paste it)
  • Complete the Abstract authorization flow
  • Return to the terminal and start using Abstract through Claude Code

Once authenticated, you can ask Claude Code to perform Abstract operations in natural language. For example:

  • "Check if this IBAN is valid"
  • "Assess risk score for this email"
  • "Validate if an email address is real"

Complete Code

Here's the complete code to get you started with Abstract 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: ['abstract'],
});

const composioMcpUrl = composioSession?.mcp.url;

console.log(`MCP URL: ${composioMcpUrl}`);
console.log(`\nUse this command to add to Claude Code:`);
console.log(`claude mcp add --transport http abstract-composio "${composioMcpUrl}" --headers "X-API-Key:${COMPOSIO_API_KEY}"`);

Conclusion

You've successfully integrated Abstract with Claude Code using Composio's MCP server. Now you can interact with Abstract directly from your terminal using natural language commands.

Key features of this setup:

  • Terminal-native experience without switching contexts
  • Natural language commands for Abstract operations
  • Secure authentication through Composio's managed MCP
  • Tool Router for dynamic tool discovery and execution

Next steps:

  • Try asking Claude Code to perform various Abstract operations
  • Add more toolkits to your Tool Router session for multi-app workflows
  • Integrate this setup into your development workflow for increased productivity

You can extend this by adding more toolkits, implementing custom workflows, or building automation scripts that leverage Claude Code's capabilities.

TOOLS

Supported Tools

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

Email validation and quality check

Validate email addresses and assess their deliverability and quality.

Get VAT Categories

Tool to retrieve VAT rate categories for a specific country, including standard, reduced, and special VAT rates.

Validate IBAN

Tool to validate the format and country code of an IBAN number.

FRAMEWORKS

How to build Abstract MCP Agent with another framework

Claude Cowork logo

Claude Cowork

Use Abstract MCP with Claude Cowork

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Abstract MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Abstract MCP with Claude Agent SDK

Codex logo

Codex

Use Abstract MCP with Codex

OpenClaw logo

OpenClaw

Use Abstract MCP with OpenClaw

Hermes logo

Hermes

Use Abstract MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Abstract MCP with Atomic Agent

Google ADK logo

Google ADK

Use Abstract MCP with Google ADK

LangChain logo

LangChain

Use Abstract MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Abstract MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Abstract MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Abstract MCP with LlamaIndex

CrewAI logo

CrewAI

Use Abstract MCP with CrewAI

Pydantic AI logo

Pydantic AI

Use Abstract MCP with Pydantic AI

AutoGen logo

AutoGen

Use Abstract MCP with AutoGen

FAQ

Frequently asked questions

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

Yes, you can. Claude Code 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 Abstract tools.

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

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