Invalid Bounce MCP for AI Agents

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Invalid Bounce MCP or direct API to verify email addresses, validate bulk lists, flag risky contacts, and clean marketing data through natural language.

Invalid Bounce logoInvalid Bounce
Api Key

Invalid Bounce is an email verification service with a bulk verification API. Use it to clean email lists, reduce bounces, and protect sender reputation.

1 Tools

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TOOL ROUTER PLAYGROUND
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TOOLS

Supported Tools

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

Start Bulk Email Verification

Irreversibly start an asynchronous email-verification job using the connected account's verification quota.

SETUP GUIDE

Connect Invalid Bounce MCP Tool with your Agent

1

Install Composio

typescript
npm install @composio/core ai @ai-sdk/openai @ai-sdk/mcp
Install the Composio SDK for Python or TypeScript
2

Initialize Client and Create Tool Router Session

typescript
import { Composio } from '@composio/core';

const composio = new Composio({ apiKey: 'your-api-key' });
const session = await composio.create('your-user-id');
console.log(`Tool Router session created: ${session.mcp.url}`);
Import and initialize the Composio client, then create a Tool Router session for Invalid Bounce
3

Connect to AI Agent

typescript
import { openai } from '@ai-sdk/openai';
import { experimental_createMCPClient as createMCPClient } from '@ai-sdk/mcp';
import { generateText } from 'ai';

const client = await createMCPClient({
  transport: {
    type: 'http',
    url: session.mcp.url,
    headers: {
      'x-api-key': 'your-composio-api-key',
    },
  },
});

const tools = await client.tools();
const { text } = await generateText({
  model: openai('gpt-4o'),
  tools,
  messages: [{
    role: 'user',
    content: 'Verify these email addresses with Invalid Bounce: alice@example.com, sales@invalid-domain.test, support@company.com'
  }],
  maxSteps: 5,
});

console.log(`Agent: ${text}`);
Use the MCP server with your AI agent (Anthropic Claude or Mastra)
SETUP GUIDE

Connect Invalid Bounce API Tool with your Agent

1

Install Composio

typescript
npm install @composio/openai
Install the Composio SDK
2

Initialize Composio and Create Tool Router Session

typescript
import OpenAI from 'openai';
import { Composio } from '@composio/core';
import { OpenAIResponsesProvider } from '@composio/openai';

const composio = new Composio({
  provider: new OpenAIResponsesProvider(),
});
const openai = new OpenAI({});
const session = await composio.create('your-user-id');
Import and initialize Composio client, then create a Tool Router session
3

Execute Invalid Bounce Tools via Tool Router with Your Agent

typescript
const tools = session.tools;
const response = await openai.responses.create({
  model: 'gpt-4.1',
  tools: tools,
  input: [{
    role: 'user',
    content: 'Verify these email addresses with Invalid Bounce: alice@example.com, sales@invalid-domain.test, support@company.com'
  }],
});
const result = await composio.provider.handleToolCalls(
  'your-user-id',
  response.output
);
console.log(result);
Get tools from Tool Router session and execute Invalid Bounce actions with your Agent

Why Use Composio?

AI Native Invalid Bounce Integration

  • Supports both Invalid Bounce MCP and direct API based integrations
  • Structured, LLM-friendly schemas for reliable email verification workflows
  • Rich coverage for checking addresses, validating bulk lists, and reviewing verification results

Managed Auth

  • Securely store Invalid Bounce API keys without hard-coding them in your agent code
  • Use auth_configs.create() and connected_accounts.link() to connect user credentials cleanly
  • Manage per user and per environment access from one place

Agent Optimized Design

  • Tools are shaped for natural language requests like verifying campaign lists or checking CRM imports
  • Comprehensive execution logs so you always know which emails were checked, when, and on whose behalf

Enterprise Grade Security

  • Fine-grained RBAC so you control which agents and users can access Invalid Bounce
  • Scoped, least privilege access for email validation workflows
  • Full audit trail of agent actions to support review and compliance
FAQ

Frequently asked questions

Yes, Invalid Bounce requires you to configure your own API key. Once set up, Composio handles secure credential storage and API request handling for you.

Yes! Composio's Tool Router enables agents to use multiple toolkits. Learn more.

Composio is SOC 2 and ISO 27001 compliant with all data encrypted in transit and at rest. Learn more.

Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.

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