Kickbox MCP server for AI agents and assistants

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Kickbox MCP or direct API to verify email addresses, clean mailing lists, score email quality, and reduce bounce rates through natural language.

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Api Key

Kickbox is a real-time email verification and list cleaning service. It helps ensure your emails reach real, active inboxes and improves deliverability.

2 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
Kickbox
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TOOLS

Supported Tools

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

Check Disposable Email

Tool to check if an email address or domain is from a disposable email service.

Kickbox Single Verification

Tool to verify a single email address via Kickbox.

SETUP GUIDE

Connect Kickbox 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: ["kickbox"],
  mcp: true,
});
Create a session scoped to Kickbox 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 if john.doe@email.com is a valid email address",
  stopWhen: stepCountIs(10),
});

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

Connect Kickbox 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: ["kickbox"] });
const tools = await session.tools();
Initialize Composio with the OpenAI Responses provider and create a session scoped to Kickbox
3

Run Kickbox tools with your agent

typescript
let response = await client.responses.create({
  model: "gpt-5.6-sol",
  tools,
  input: [{ role: "user", content: "Verify if john.doe@email.com is a valid email address" }],
});

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 Kickbox tool calls through the session, and print the final answer

Why Use Composio?

AI Native Kickbox Integration

  • Supports both Kickbox MCP and direct API based integrations
  • Structured, LLM-friendly schemas for reliable tool execution
  • Rich coverage for email verification, list cleaning, and quality scoring

Managed Auth

  • Built-in API key management with automatic rotation
  • Central place to manage and revoke Kickbox credentials
  • Per user and per environment keys instead of hard-coding

Agent Optimized Design

  • Tools are tuned using real error and success rates to maximize reliability
  • Comprehensive logs so you always know which emails were verified and when

Enterprise Grade Security

  • Fine-grained RBAC lets you control which agents can access Kickbox
  • Scoped, least privilege access to Kickbox resources
  • Full audit trail of agent actions for review and compliance

Rolling this out across your team?

Give your team centralized access control across every framework with Composio’s MCP Gateway.

EXPLORE MCP GATEWAY
FAQ

Frequently asked questions

Yes, Kickbox 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.

Yes. Composio is SOC 2 Type II compliant and is built to keep your Kickbox connection and credentials secure. OAuth tokens and API keys are encrypted, and sensitive customer data is protected at rest and in transit.

Composio also undergoes independent security testing and continuously monitors its systems for security threats. You can review the latest reports and policies in the Composio Trust Center.

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

Create the key in your Kickbox account settings, then paste it once on Composio's connection page. Composio stores it encrypted and uses it only for the Kickbox actions your agent runs. Nobody else in your workspace can read it, and you can revoke it inside Kickbox at any time.

When you connect a Kickbox account through Composio, every action runs under that account, so anything the agent creates, sends, or changes shows up in Kickbox as done by you. Keep an approval step in your prompt for actions with side effects, such as sending or deleting, and have the agent draft first.

Whatever the credentials you connect allow inside Kickbox. If Kickbox lets you scope a key to specific permissions, create a scoped one so the agent can only do what you intend. You can revoke the key inside Kickbox at any time.

Yes. Composio supports multiple connected accounts for the same app, and that works in Claude, ChatGPT, or any other assistant you connect through Composio. Give each Kickbox connection a name such as work or personal, and the assistant uses the one you mention in the request. Each account keeps its own credentials and nothing is merged.

The connection stops working the moment Kickbox rejects the old key. Create a new key in Kickbox and reconnect the account from the Composio dashboard or by asking your agent to reconnect Kickbox. Nothing else changes.

Composio's free Hobby plan includes 100,000 tool calls per month with no credit card, which covers most personal Kickbox use. Paid plans add higher limits and team features. Your Kickbox plan and its API limits still apply as usual.

Built-in connectors usually give one AI access to a limited set of apps. Many people use Composio because it lets their AI connect to more apps than it normally supports, or connect to multiple accounts for the same app (e.g. connect Claude to multiple Kickbox accounts).

With Composio, you connect Kickbox once and then use it across different AI assistants without setting it up separately in each one. Connect your apps to Composio once, then connect Composio to whichever AI you use, whether that's Claude, ChatGPT, Hermes, or your own custom assistant.

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