# How to integrate Emaillistverify MCP with Atomic Agent ```json { "title": "How to integrate Emaillistverify MCP with Atomic Agent", "toolkit": "Emaillistverify", "toolkit_slug": "emaillistverify", "framework": "Atomic Agent", "framework_slug": "atomic-agent", "url": "https://composio.dev/toolkits/emaillistverify/framework/atomic-agent", "markdown_url": "https://composio.dev/toolkits/emaillistverify/framework/atomic-agent.md", "updated_at": "2026-08-11T13:09:05.412Z" } ``` ## Introduction Atomic Agent is an open-source AI agent that runs on your machine and supports local models through llama.cpp. Connect it to 1,500+ apps through Composio, including Emaillistverify. This guide uses Atomic Agent's built-in Composio integration. You need Atomic Agent v0.5.6 or later, your own Composio API key, and a Emaillistverify account. See the [Atomic Agent documentation](https://atomicagent.io/docs/?cta_placement=atomic-agent-docs) for installation instructions. ## Also integrate Emaillistverify with - [OpenAI Agents SDK](https://composio.dev/toolkits/emaillistverify/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/emaillistverify/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/emaillistverify/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/emaillistverify/framework/claude-cowork) - [Codex](https://composio.dev/toolkits/emaillistverify/framework/codex) - [OpenClaw](https://composio.dev/toolkits/emaillistverify/framework/openclaw) - [Hermes](https://composio.dev/toolkits/emaillistverify/framework/hermes-agent) - [Google ADK](https://composio.dev/toolkits/emaillistverify/framework/google-adk) - [LangChain](https://composio.dev/toolkits/emaillistverify/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/emaillistverify/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/emaillistverify/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/emaillistverify/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/emaillistverify/framework/crew-ai) - [Pydantic AI](https://composio.dev/toolkits/emaillistverify/framework/pydantic-ai) - [AutoGen](https://composio.dev/toolkits/emaillistverify/framework/autogen) ## TL;DR ### How Atomic Agent connects to Emaillistverify Atomic Agent connects to Composio's Tool Router over Streamable HTTP MCP. It discovers the tools needed for your request, and Composio handles account authentication. Execution and account-connection tools follow Atomic Agent's configured approval policy. Review any approval prompt before allowing an action on your connected account. ## Connect Emaillistverify to Atomic Agent ### Connect Emaillistverify to Atomic Agent - Sign up or sign in to the [Composio dashboard](https://dashboard.composio.dev/?cta_placement=atomic-agent-api-key). Copy your API key. - In Atomic Agent, open the Integrations tab and select Composio. Select API key, press e, paste the key, and press Enter. The tools become available immediately, without a restart. - Ask Atomic Agent to do something in Emaillistverify. It searches Composio for the right tool. - On first use, open the sign-in link returned in the chat. Connect your Emaillistverify account, then return to Atomic Agent to continue. ### Headless setup Add the following line to ~/.atomic-agent/.env, replacing YOUR_COMPOSIO_API_KEY with your key. Start Atomic Agent after saving the file. ```bash COMPOSIO_API_KEY=YOUR_COMPOSIO_API_KEY ``` ## What is the Emaillistverify MCP server, and what's possible with it? The Emaillistverify MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Emaillistverify account. It provides structured and secure access to your email verification tools, so your agent can validate addresses, check deliverability, and provide detailed insights into email list quality on your behalf. - Real-time email verification: Instantly check if a single email address is valid and deliverable before adding it to your list or sending messages. - Detailed email validation insights: Get in-depth reports on why an email address may be risky or undeliverable, including error types and validation reasons. - Automated list hygiene: Quickly verify new signups or leads as they come in, helping you keep your email lists clean and up-to-date. - Prevent bounced emails: Reduce hard bounces and protect your sender reputation by validating addresses before campaigns are sent. ## Supported Tools | Tool slug | Name | Description | |---|---|---| | `EMAILLISTVERIFY_CHECK_BLACKLISTS` | Check Blacklists | Tool to check an IP address (IPv4/IPv6) or domain against multiple DNS-based blacklists (DNSBLs) for spam or malicious activity. Use when you need to verify the reputation of an IP or domain. Rate limit: 10 requests/second. | | `EMAILLISTVERIFY_CHECK_DISPOSABLE` | Check Disposable Domain | Tool to verify if an email domain is associated with temporary/disposable email addresses. Includes DNS record verification. Use when you need to validate if a domain is disposable before accepting email registrations. | | `EMAILLISTVERIFY_DELETE_MAILLIST` | Delete Maillist | Tool to delete a finished email list. Use when you need to remove a completed verification list. Only lists that have completed verification can be deleted. | | `EMAILLISTVERIFY_DOWNLOAD_MAILLIST` | Download Email List | Tool to download a finished email list with verification results. Supports customizable columns (firstName, lastName, gender, result, etc.) and file format (csv/xlsx). Rate limit: 5 requests/second. | | `EMAILLISTVERIFY_FIND_CONTACT` | Find Contact Email | Tool to search for a contact's business email address by name and company domain. Returns possible emails with confidence levels (high/medium/low/unknown). Rate limit: 5 requests/second. Credits: 5 (with name) or 10 (domain only). | | `EMAILLISTVERIFY_GET_API_FILE_INFO` | Get API File Info | Tool to retrieve progress of an uploaded email list verification. Returns status (errored/waiting/progress/finished) with download URLs when complete. | | `EMAILLISTVERIFY_GET_CREDITS` | Get Credits | Tool to retrieve details about available on-demand and subscription credits. Use when you need to check credit balance before performing verifications. On-demand credits never expire, subscription credits are refreshed daily. Rate limit: 10 requests/second. | | `EMAILLISTVERIFY_GET_EMAIL_JOB` | Get Email Job Status | Tool to get the status of an asynchronous email verification job. Use when you need to check if a verification job has completed and retrieve its results. Rate limit: 100 requests per second. | | `EMAILLISTVERIFY_GET_MAILLIST_PROGRESS` | Get Maillist Progress | Tool to retrieve real-time progress updates for an uploaded email list verification. Shows status, completion percentage, and credit usage. Rate limit: 100 requests/second. | | `EMAILLISTVERIFY_UPLOAD_EMAIL_LIST` | Upload Email List | Tool to upload an email list file for bulk verification. Accepts .csv, .txt, or .xlsx files (max 100MB, 1M rows). Returns an ID to query verification progress. Rate limit: 5 requests/second. | | `EMAILLISTVERIFY_VERIFY_SINGLE_EMAIL` | Verify Single Email | Tool to verify email deliverability status of a single email address. Returns a plain text status representing deliverability. Rate limit: 10 requests/second. Credits required: 1. | | `EMAILLISTVERIFY_VERIFY_SINGLE_EMAIL_DETAILED` | 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. Use when you need comprehensive email validation beyond basic deliverability. Rate limit: 10 requests/second, requires 1 credit per verification. | ## Supported Triggers None listed. ## Troubleshooting ### Why is my API key rejected? Copy the key directly from the Composio dashboard. Atomic Agent requires ASCII characters because it sends the key in an HTTP header. Remove any extra characters introduced when copying. ### Why are Composio tools unavailable after saving a key? Check that you use Atomic Agent v0.5.6 or later and that Composio is enabled in your configuration. A "composio": { "enabled": false } setting disables the integration while keeping the saved key on disk. ### Does Composio have a free plan? The Hobby plan includes 100,000 tool calls per month. Composio-managed OAuth apps have a lower included allowance. See [Composio pricing](/pricing) for the current limits that apply to your connection. ## Complete Code None listed. ## Conclusion ### Use Emaillistverify from Atomic Agent With your account connected, ask Atomic Agent to work with Emaillistverify in natural language. You can connect more apps through the same Composio integration as you need them. Visit the [Atomic Agent website](https://atomicagent.io/?cta_placement=atomic-agent-site) or inspect the [Atomic Agent source code](https://github.com/AtomicBot-ai/atomic-agent?cta_placement=atomic-agent-repo). ## How to build Emaillistverify MCP Agent with another framework - [OpenAI Agents SDK](https://composio.dev/toolkits/emaillistverify/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/emaillistverify/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/emaillistverify/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/emaillistverify/framework/claude-cowork) - [Codex](https://composio.dev/toolkits/emaillistverify/framework/codex) - [OpenClaw](https://composio.dev/toolkits/emaillistverify/framework/openclaw) - [Hermes](https://composio.dev/toolkits/emaillistverify/framework/hermes-agent) - [Google ADK](https://composio.dev/toolkits/emaillistverify/framework/google-adk) - [LangChain](https://composio.dev/toolkits/emaillistverify/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/emaillistverify/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/emaillistverify/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/emaillistverify/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/emaillistverify/framework/crew-ai) - [Pydantic AI](https://composio.dev/toolkits/emaillistverify/framework/pydantic-ai) - [AutoGen](https://composio.dev/toolkits/emaillistverify/framework/autogen) ## Related Toolkits - [Reddit](https://composio.dev/toolkits/reddit) - Reddit is a social news platform with thriving user-driven communities (subreddits). 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Use it to reliably send transactional and triggered emails and manage subscribers at scale. - [Brandfetch](https://composio.dev/toolkits/brandfetch) - Brandfetch is an API that delivers company logos, colors, and visual branding assets. It helps marketers and developers keep brand visuals consistent everywhere. - [Braze](https://composio.dev/toolkits/braze) - Braze is a customer engagement platform for managing user data, messaging, campaigns, and analytics. Use it to deliver targeted, multi-channel messaging and analyze campaign performance. - [Brevo](https://composio.dev/toolkits/brevo) - Brevo is an all-in-one email and SMS marketing platform for transactional messaging, automation, and CRM. It helps businesses engage customers and streamline communications through powerful campaign tools. - [Buffer](https://composio.dev/toolkits/buffer) - Buffer is a social media management platform for planning, creating, scheduling, and publishing posts across connected channels. It helps teams keep content organized and publish consistently without jumping between social apps. - [BulkPublish](https://composio.dev/toolkits/bulkpublish) - BulkPublish is a social media publishing platform for managing scheduled content across multiple channels. It helps teams plan campaigns, publish consistently, and track performance in one place. ## Frequently Asked Questions ### What are the differences in Tool Router MCP and Emaillistverify MCP? With a standalone Emaillistverify MCP server, the agents and LLMs can only access a fixed set of Emaillistverify tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Emaillistverify and many other apps based on the task at hand, all through a single MCP endpoint. ### Can I use Tool Router MCP with Atomic Agent? Yes, you can. Atomic Agent 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 Emaillistverify tools. ### Can I manage the permissions and scopes for Emaillistverify while using Tool Router? Yes, absolutely. You can configure which Emaillistverify 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. ### How safe is my data with Composio Tool Router? 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 Emaillistverify data and credentials are handled as safely as possible. --- [See all toolkits](https://composio.dev/toolkits) · [Composio docs](https://docs.composio.dev/llms.txt)