Bouncer MCP for AI Agents

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Bouncer MCP or direct API to verify emails, check deliverability, validate lists, and manage results through natural language.

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Api Key

Bouncer is an email validation platform that verifies the authenticity of email addresses in real-time and batch. It helps boost deliverability and reduce bounce rates for your communications.

10 Tools

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Type what you want done — sign in and watch it run live in the Tool Router playground.

TOOL ROUTER PLAYGROUND
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TOOLS

Supported Tools

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

Check Toxicity List Job Status

Tool to check the status of a specific toxicity list job.

Create Batch Request

Initiates an asynchronous batch email verification request.

Create Toxicity List Job

Tool to create a toxicity analysis job for a list of email addresses.

Delete batch request

Deletes a batch email verification request and all associated emails and results.

Delete Toxicity List Job

Tool to delete a specific toxicity list job.

Finish Batch

Tool to mark a batch verification process as finished early.

Get Batch Results

Tool to retrieve the results of a batch verification process.

Get Credits

Tool to retrieve the current credit balance for the account.

Verify Domain

Tool to verify the validity and configuration of a domain.

Verify Email

Tool to verify a single email address in real-time.

SETUP GUIDE

Connect Bouncer MCP Tool with your Agent

1

Install Composio

typescript
npm install @composio/core ai @ai-sdk/mcp @ai-sdk/openai
Install the Composio SDK and your agent framework
2

Create a session with MCP enabled

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

const composio = new Composio();
const { mcp } = await composio.create("your-user-id", {
  toolkits: ["bouncer"],
  mcp: true,
});
Create a session scoped to Bouncer and read its MCP URL and headers
3

Connect your agent to the MCP server

typescript
import { createMCPClient } from "@ai-sdk/mcp";
import { openai } from "@ai-sdk/openai";
import { generateText, stepCountIs } from "ai";

const client = await createMCPClient({
  transport: { type: "http", url: mcp.url, headers: mcp.headers },
});

const { text } = await generateText({
  model: openai("gpt-5.6-sol"),
  tools: await client.tools(),
  prompt: "Verify this list of emails for deliverability",
  stopWhen: stepCountIs(10),
});

console.log(text);
await client.close();
Pass the session's MCP URL and headers to your agent and run a Bouncer request
SETUP GUIDE

Connect Bouncer API Tool with your Agent

1

Install Composio

typescript
npm install @composio/core @composio/openai openai
Install the Composio SDK, the OpenAI provider, and the OpenAI SDK
2

Create a Composio session

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

const composio = new Composio({ provider: new OpenAIResponsesProvider() });
const client = new OpenAI();

const session = await composio.create("your-user-id", { toolkits: ["bouncer"] });
const tools = await session.tools();
Initialize Composio with the OpenAI Responses provider and create a session scoped to Bouncer
3

Run Bouncer tools with your agent

typescript
let response = await client.responses.create({
  model: "gpt-5.6-sol",
  tools,
  input: [{ role: "user", content: "Verify this list of emails for deliverability" }],
});

while (response.output.some((o) => o.type === "function_call")) {
  const outputs = await composio.provider.handleToolCalls(session, response.output);
  response = await client.responses.create({
    model: "gpt-5.6-sol",
    tools,
    previous_response_id: response.id,
    input: outputs,
  });
}

console.log(response.output_text);
Send a request, execute the Bouncer tool calls through the session, and print the final answer

Why Use Composio?

AI Native Bouncer Integration

  • Supports both Bouncer MCP and direct API based integrations
  • Structured, LLM-friendly schemas for reliable tool execution
  • Rich coverage for real-time and batch email validation

Managed Auth

  • API key handling with secure storage and rotation
  • Central place to manage, scope, and revoke Bouncer access
  • Per user and per environment credentials instead of hard-coded keys

Agent Optimized Design

  • Tools are tuned using real error and success rates to improve reliability over time
  • Comprehensive execution logs so you always know what ran, when, and on whose behalf

Enterprise Grade Security

  • Fine-grained RBAC so you control which agents and users can access Bouncer
  • Scoped, least privilege access to Bouncer resources
  • Full audit trail of agent actions to support review and compliance
FAQ

Frequently asked questions

Yes, Bouncer requires you to configure your own API key credentials. 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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