--- title: "mails.so integrations and MCP server - APIANT.ai" description: "Connect mails.so to any other app, or use it from your AI client over MCP. mails.so is an email validation service." canonical: "https://apiant.ai/connections/mails-so" --- # mails.so integrations Connect mails.so to any other app, or use it from your AI client over MCP. mails.so is an email validation service. It checks if an address is valid, if it exists, or if it can receive mail, keeping your contact lists clean. Connects with an API key [mails.so](https://mails.so/) **2** actions What the catalog holds today. Ask for anything missing and your agent reads the API documentation and adds it. ## What do you want to automate with mails.so? Give your AI client this address. `https://mcp.apiant.ai` One connection does both: ask your client to act in an app once, or have it build an automation that keeps running. Any client that takes a remote MCP server. Nothing to install. Create your free account, then sign in once in your browser. ### Set it up in your client ### Claude Code Run this in the directory you want to work in. `claude mcp add --transport http -s project apiant-ai https://mcp.apiant.ai` Start Claude Code there, approve the server, and sign in in the browser page it opens. [Claude Code guide (opens in a new tab)](https://apiant.ai/docs/mcp/claude-code) ### Claude, web and desktop Open Customize, then Connectors, then Add custom connector, and paste the address. On Team and Enterprise an owner adds it first. [Setup guide (opens in a new tab)](https://apiant.ai/docs/mcp) ### Cursor Add the address to your MCP configuration as a server URL. Cursor signs you in in your browser. [Setup guide (opens in a new tab)](https://apiant.ai/docs/mcp) ### Zed Open Settings, then AI, then MCP Servers, then Add Server, then Add Remote Server. [Setup guide (opens in a new tab)](https://apiant.ai/docs/mcp) ### Codex and the ChatGPT desktop app Open Settings, then MCP servers, then Add server, and choose Streamable HTTP. From the terminal, Codex takes the address with its own add command and then signs you in. [Setup guide (opens in a new tab)](https://apiant.ai/docs/mcp) ### Any other MCP client Paste the address where the client asks for a remote MCP server URL, and name the server apiant-ai where it lets you. APIANT's skills reach the client over the same connection. [Setup guide (opens in a new tab)](https://apiant.ai/docs/mcp) Popular ## mails.so with the apps people pair it with most - [ **HubSpot to mails.so** HubSpot is your all-in-one stop for all of your marketing software needs.](https://apiant.ai/connect/hubspot-to-mails-so) - [ **Salesforce to mails.so** Salesforce is a leading enterprise customer relationship management (CRM) platform.](https://apiant.ai/connect/salesforce-to-mails-so) - [ **Slack to mails.so** Slack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...](https://apiant.ai/connect/slack-to-mails-so) - [ **Google Sheets to mails.so** Google Sheets is Google's online spreadsheet app for creating, editing and sharing spreadsheets.](https://apiant.ai/connect/google-sheets-to-mails-so) - [ **Gmail to mails.so** Gmail is Google’s email service, featuring spam protection, search functions, and seamless integration with...](https://apiant.ai/connect/gmail-to-mails-so) - [ **Google Calendar to mails.so** Google Calendar is a time management tool providing scheduling features, event reminders, and integration...](https://apiant.ai/connect/google-calendar-to-mails-so) - [ **Google Drive to mails.so** Google Drive is a cloud storage solution for uploading, sharing, and collaborating on files across devices...](https://apiant.ai/connect/google-drive-to-mails-so) - [ **Mailchimp to mails.so** Mailchimp marketing automation and email platform.](https://apiant.ai/connect/mailchimp-to-mails-so) Pair it ## Connect mails.so with another app - [ **AWeber to mails.so**](https://apiant.ai/connect/aweber-to-mails-so) - [ **HubSpot to mails.so**](https://apiant.ai/connect/hubspot-to-mails-so) - [ **Salesforce to mails.so**](https://apiant.ai/connect/salesforce-to-mails-so) - [ **Slack to mails.so**](https://apiant.ai/connect/slack-to-mails-so) - [ **Google Sheets to mails.so**](https://apiant.ai/connect/google-sheets-to-mails-so) - [ **Gmail to mails.so**](https://apiant.ai/connect/gmail-to-mails-so) - [ **Google Calendar to mails.so**](https://apiant.ai/connect/google-calendar-to-mails-so) - [ **Google Drive to mails.so**](https://apiant.ai/connect/google-drive-to-mails-so) - [ **Mailchimp to mails.so**](https://apiant.ai/connect/mailchimp-to-mails-so) - [ **Stripe to mails.so**](https://apiant.ai/connect/stripe-to-mails-so) - [ **Shopify to mails.so**](https://apiant.ai/connect/shopify-to-mails-so) - [ **QuickBooks Online to mails.so**](https://apiant.ai/connect/quickbooks-online-to-mails-so) - [ **Pipedrive to mails.so**](https://apiant.ai/connect/pipedrive-to-mails-so) - [ **ActiveCampaign to mails.so**](https://apiant.ai/connect/activecampaign-to-mails-so) - [ **Notion to mails.so**](https://apiant.ai/connect/notion-to-mails-so) - [ **Airtable to mails.so**](https://apiant.ai/connect/airtable-to-mails-so) - [ **Trello to mails.so**](https://apiant.ai/connect/trello-to-mails-so) - [ **Asana to mails.so**](https://apiant.ai/connect/asana-to-mails-so) - [ **JIRA to mails.so**](https://apiant.ai/connect/jira-to-mails-so) - [ **ClickUp to mails.so**](https://apiant.ai/connect/clickup-to-mails-so) - [ **Zoom to mails.so**](https://apiant.ai/connect/zoom-to-mails-so) - [ **Discord to mails.so**](https://apiant.ai/connect/discord-to-mails-so) - [ **Twilio to mails.so**](https://apiant.ai/connect/twilio-to-mails-so) - [ **SendGrid to mails.so**](https://apiant.ai/connect/sendgrid-to-mails-so) - [ **Outlook to mails.so**](https://apiant.ai/connect/outlook-to-mails-so) - [ **Intercom to mails.so**](https://apiant.ai/connect/intercom-to-mails-so) - [ **Freshdesk to mails.so**](https://apiant.ai/connect/freshdesk-to-mails-so) - [ **Klaviyo to mails.so**](https://apiant.ai/connect/klaviyo-to-mails-so) - [ **Brevo to mails.so**](https://apiant.ai/connect/brevo-to-mails-so) - [ **Typeform to mails.so**](https://apiant.ai/connect/typeform-to-mails-so) - [ **JotForm to mails.so**](https://apiant.ai/connect/jotform-to-mails-so) - [ **Calendly to mails.so**](https://apiant.ai/connect/calendly-to-mails-so) - [ **PandaDoc to mails.so**](https://apiant.ai/connect/pandadoc-to-mails-so) - [ **Webflow to mails.so**](https://apiant.ai/connect/webflow-to-mails-so) - [ **Wix to mails.so**](https://apiant.ai/connect/wix-to-mails-so) - [ **Instagram to mails.so**](https://apiant.ai/connect/instagram-to-mails-so) - [ **OpenAI to mails.so**](https://apiant.ai/connect/openai-to-mails-so) - [ **OneDrive to mails.so**](https://apiant.ai/connect/onedrive-to-mails-so) - [ **Google Docs to mails.so**](https://apiant.ai/connect/google-docs-to-mails-so) - [ **Ontraport to mails.so**](https://apiant.ai/connect/ontraport-to-mails-so) - [ **Freshworks CRM to mails.so**](https://apiant.ai/connect/freshworks-crm-to-mails-so) - [ **GoHighLevel to mails.so**](https://apiant.ai/connect/gohighlevel-to-mails-so) - [ **Capsule CRM to mails.so**](https://apiant.ai/connect/capsule-crm-to-mails-so) - [ **Copper to mails.so**](https://apiant.ai/connect/copper-to-mails-so) - [ **Streak to mails.so**](https://apiant.ai/connect/streak-to-mails-so) - [ **NetHunt CRM to mails.so**](https://apiant.ai/connect/nethunt-crm-to-mails-so) - [ **MINDBODY to mails.so**](https://apiant.ai/connect/mindbody-to-mails-so) - [ **PostgreSQL to mails.so**](https://apiant.ai/connect/postgresql-to-mails-so) - [ **MySQL to mails.so**](https://apiant.ai/connect/mysql-to-mails-so) - [ **Vercel to mails.so**](https://apiant.ai/connect/vercel-to-mails-so) - [ **PagerDuty to mails.so**](https://apiant.ai/connect/pagerduty-to-mails-so) - [ **Gravity Forms to mails.so**](https://apiant.ai/connect/gravity-forms-to-mails-so) - [ **HubSpot Enterprise to mails.so**](https://apiant.ai/connect/hubspot-enterprise-to-mails-so) - [ **Google Forms to mails.so**](https://apiant.ai/connect/google-forms-to-mails-so) - [ **Facebook Lead Ads to mails.so**](https://apiant.ai/connect/facebook-lead-ads-to-mails-so) - [ **monday.com to mails.so**](https://apiant.ai/connect/monday-com-to-mails-so) - [ **Google Ads to mails.so**](https://apiant.ai/connect/google-ads-to-mails-so) - [ **Google Tasks to mails.so**](https://apiant.ai/connect/google-tasks-to-mails-so) - [ **Telegram to mails.so**](https://apiant.ai/connect/telegram-to-mails-so) - [ **MailerLite to mails.so**](https://apiant.ai/connect/mailerlite-to-mails-so) What your agent can do with mails.so ## Triggers and actions 2 actions - Action **Bulk validate email addresses** Submits a list of email addresses to mails.so for asynchronous bulk validation and returns the batch job. - Action **Validate Email Address** Validates a single email address and returns its deliverability result, score and the individual checks. ## Related apps - [ **44API** 44API is a VAT & Tax ID Validation service that validates VAT numbers and Tax IDs in 50+ countries with...](https://apiant.ai/connections/44api) - [ **Apexverify** ApexVerify is a contact-data verification service.](https://apiant.ai/connections/apexverify) - [ **Attestwire** Validate EN 16931 e-invoices: XRechnung, ZUGFeRD, Factur-X, Peppol BIS](https://apiant.ai/connections/attestwire) - [ **Bouncer** Bouncer is a fast, user-friendly, and powerful email verification service.](https://apiant.ai/connections/bouncer) - [ **Byteplant Email Validator** Byteplant Email-Validator validates email addresses right at the point of entry with a real-time live check...](https://apiant.ai/connections/byteplant-email-validator) - [ **Byteplant Phone Validator** Byteplant Phone-Validator allows you to validate phone numbers (mobile & landline) from 240 countries...](https://apiant.ai/connections/byteplant-phone-validator) - [ **ClearBounce** ClearBounce is a real-time email verification service that reduces bounces, protects sender reputation, and...](https://apiant.ai/connections/clearbounce) - [ **DataScreenIQ** Screen data for schema drift, type mismatches, and null rate anomalies](https://apiant.ai/connections/datascreeniq) [More in Data Validation](https://apiant.ai/apps/data-validation) Reviews ## What our customers say Questions ## mails.so, answered ### ### Is there a mails.so MCP server? APIANT's MCP server at https://mcp.apiant.ai works with mails.so. Add that address to any AI client that takes a remote MCP server and sign in once in your browser. Your client can then run mails.so actions on demand, or have APIANT build, test and run automations that use mails.so. Nothing to install. ### ### What can your agent do in mails.so? Any of mails.so's 2 actions, including Bulk validate email addresses and Validate Email Address. Your agent maps the data both ways and tests every scenario before it ships. ### ### Can I use mails.so directly from Claude, ChatGPT or Cursor? Yes. Connect your AI client to APIANT once and it works with mails.so two ways. Ask it to do something in mails.so once and it runs that action on the spot. Ask for an automation and your agent builds it, tests every scenario and keeps it running on its own. A one-off action uses your plan's tasks the same way an automation step does. ### ### Do I need to write code against the mails.so API? No. APIANT connects to the mails.so API for you, with your mails.so API key. Describe what you want in plain language and your agent builds it on the mails.so triggers and actions in the catalog. If you need an endpoint that is not there yet, your agent reads the mails.so API documentation and adds it. ### ### Which apps can mails.so connect to? Any app in the catalog; the list on this page pairs mails.so with each of them. If the other app is missing, point your agent at its API documentation and it builds the connector. ### ### What happens when something fails? Your agent works that out for you. It plans the failure paths along with the happy path, then tests every scenario before it ships. ### ### Is there a free plan? Yes. Every plan includes the agent, including free, and building from your own AI client spends no assistant credits.