Emaillistverify MCP server for AI agents and assistants

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Emaillistverify MCP or direct API to validate emails, clean lists, detect bounces, and improve deliverability through natural language.

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Api Key

EmailListVerify is a platform for verifying and validating email addresses in bulk. It helps ensure your contact lists are accurate, reducing bounces and improving deliverability.

12 Tools

Try Emaillistverify now

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

TOOL ROUTER PLAYGROUND
Emaillistverify
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TOOLS

Supported Tools

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

Check Blacklists

Tool to check an IP address (IPv4/IPv6) or domain against multiple DNS-based blacklists (DNSBLs) for spam or malicious activity.

Check Disposable Domain

Tool to verify if an email domain is associated with temporary/disposable email addresses.

Delete Maillist

Tool to delete a finished email list.

Download Email List

Tool to download a finished email list with verification results.

Find Contact Email

Tool to search for a contact's business email address by name and company domain.

Get API File Info

Tool to retrieve progress of an uploaded email list verification.

Get Credits

Tool to retrieve details about available on-demand and subscription credits.

Get Email Job Status

Tool to get the status of an asynchronous email verification job.

Get Maillist Progress

Tool to retrieve real-time progress updates for an uploaded email list verification.

Upload Email List

Tool to upload an email list file for bulk verification.

Verify Single Email

Tool to verify email deliverability status of a single email address.

Verify Single Email Detailed

Tool to verify email deliverability with detailed metadata including MX server info, ESP, first/last name estimation, gender, and role detection.

SETUP GUIDE

Connect Emaillistverify 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: ["emaillistverify"],
  mcp: true,
});
Create a session scoped to Emaillistverify 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: "Check if john.doe@example.com is a deliverable 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 Emaillistverify request
SETUP GUIDE

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

Run Emaillistverify tools with your agent

typescript
let response = await client.responses.create({
  model: "gpt-5.6-sol",
  tools,
  input: [{ role: "user", content: "Check if john.doe@example.com is a deliverable 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 Emaillistverify tool calls through the session, and print the final answer

Why Use Composio?

AI Native Emaillistverify Integration

  • Supports both Emaillistverify MCP and direct API based integrations
  • Structured, LLM-friendly schemas for reliable tool execution
  • Rich coverage for bulk and single email verification, list cleaning, and status queries

Managed Auth

  • Built-in API key management for Emaillistverify
  • Central place to manage and revoke API credentials
  • Per user and per environment keys—no more hard-coding secrets

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 Emaillistverify
  • Scoped, least privilege access to email verification resources
  • Full audit trail of agent actions to support 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, Emaillistverify 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 Emaillistverify 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 Emaillistverify account settings, then paste it once on Composio's connection page. Composio stores it encrypted and uses it only for the Emaillistverify actions your agent runs. Nobody else in your workspace can read it, and you can revoke it inside Emaillistverify at any time.

When you connect a Emaillistverify account through Composio, every action runs under that account, so anything the agent creates, sends, or changes shows up in Emaillistverify 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 Emaillistverify. If Emaillistverify 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 Emaillistverify 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 Emaillistverify 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 Emaillistverify rejects the old key. Create a new key in Emaillistverify and reconnect the account from the Composio dashboard or by asking your agent to reconnect Emaillistverify. Nothing else changes.

Composio's free Hobby plan includes 100,000 tool calls per month with no credit card, which covers most personal Emaillistverify use. Paid plans add higher limits and team features. Your Emaillistverify 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 Emaillistverify accounts).

With Composio, you connect Emaillistverify 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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