--- title: "Connect CLOSUM and MailCheck.ai - APIANT.ai" description: "When \"New Lead\" fires in CLOSUM, your agent runs \"Get email\" in MailCheck.ai." canonical: "https://apiant.ai/connect/closum-to-mailcheck-ai" --- # Connect CLOSUM and MailCheck.ai When **New Lead** fires in [CLOSUM](https://apiant.ai/connections/closum), your agent runs **Get email** in [MailCheck.ai](https://apiant.ai/connections/mailcheck-ai), or **Domain added to blocklist (instant)** in MailCheck.ai to **Add Lead** in CLOSUM. Describe the whole flow and it is built, tested on every scenario and kept running. CLOSUM **1** trigger CLOSUM **3** actions MailCheck.ai **4** triggers MailCheck.ai **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 CLOSUM and MailCheck.ai to do together? 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) Example flows ## What CLOSUM and MailCheck.ai can do together ### From CLOSUM to MailCheck.ai - When **New Lead** in CLOSUM then **Get email** in MailCheck.ai - When **New Lead** in CLOSUM then **Get domain** in MailCheck.ai ### From MailCheck.ai to CLOSUM - When **Domain added to blocklist (instant)** in MailCheck.ai then **Add Lead** in CLOSUM - When **Domain flagged as relay (instant)** in MailCheck.ai then **Get lead** in CLOSUM Starting points drawn from the triggers and actions in the catalog today. Describe the flow you need, at any depth, and your agent builds it and tests every scenario before it ships. Everything your agent can do with CLOSUM and MailCheck.ai ## Triggers and actions 5 triggers · 5 actions - Trigger **New Lead** Fires once for each new lead added in Closum. - Action **Add Lead** Add a new lead to account - Action **Get lead** Get a lead by id. - Action **List leads** List leads. - Trigger **Domain added to blocklist (instant)** Fires when a domain is added to the account's blocklist. - Trigger **Domain flagged as relay (instant)** Fires when a previously-looked-up domain is newly flagged as a relay/forwarding domain. - Trigger **Domain flagged as spam (instant)** Fires when a previously-looked-up domain is newly flagged as a spam domain. - Trigger **Domain unflagged as spam (instant)** Fires when a previously-looked-up domain changes from spam to non-spam. - Action **Get domain** Check a domain for disposable/relay/spam status, MX configuration, age, SPF/DMARC posture, and blocklist status. - Action **Get email** Check an email address for disposable/relay/role-account status, normalized form, and its domain's signals. ## Each app on its own - [ **CLOSUM** Closum is a inbound marketing platform, focused on small and medium companies to do their own landing pages...](https://apiant.ai/connections/closum) - [ **MailCheck.ai** MailCheck.ai detects disposable and temporary email addresses so they can be blocked at signup.](https://apiant.ai/connections/mailcheck-ai) Reviews ## What our customers say ## More from CLOSUM - [ **CLOSUM to HubSpot** HubSpot is your all-in-one stop for all of your marketing software needs.](https://apiant.ai/connect/closum-to-hubspot) - [ **CLOSUM to Salesforce** Salesforce is a leading enterprise customer relationship management (CRM) platform.](https://apiant.ai/connect/closum-to-salesforce) - [ **CLOSUM to Slack** Slack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...](https://apiant.ai/connect/closum-to-slack) - [ **CLOSUM to Google Sheets** Google Sheets](https://apiant.ai/connect/closum-to-google-sheets) - [ **CLOSUM to Gmail** Gmail is Google’s email service, featuring spam protection, search functions, and seamless integration with...](https://apiant.ai/connect/closum-to-gmail) - [ **CLOSUM to Google Calendar** Google Calendar is a time management tool providing scheduling features, event reminders, and integration...](https://apiant.ai/connect/closum-to-google-calendar) ## More into MailCheck.ai - [ **Caspio to MailCheck.ai** Caspio is a low-code database platform for building online database applications.](https://apiant.ai/connect/caspio-to-mailcheck-ai) - [ **HubSpot to MailCheck.ai** HubSpot is your all-in-one stop for all of your marketing software needs.](https://apiant.ai/connect/hubspot-to-mailcheck-ai) - [ **Google Sheets to MailCheck.ai** Google Sheets](https://apiant.ai/connect/google-sheets-to-mailcheck-ai) - [ **Gmail to MailCheck.ai** Gmail is Google’s email service, featuring spam protection, search functions, and seamless integration with...](https://apiant.ai/connect/gmail-to-mailcheck-ai) - [ **Google Calendar to MailCheck.ai** Google Calendar is a time management tool providing scheduling features, event reminders, and integration...](https://apiant.ai/connect/google-calendar-to-mailcheck-ai) - [ **Google Drive to MailCheck.ai** Google Drive is a cloud storage solution for uploading, sharing, and collaborating on files across devices...](https://apiant.ai/connect/google-drive-to-mailcheck-ai) Questions ## CLOSUM and MailCheck.ai, answered ### ### What can start an automation from CLOSUM? Any of CLOSUM's 1 trigger in the catalog, including New Lead. Describe the moment in plain language and your agent picks the right one. ### ### What can your agent do in MailCheck.ai when something happens in CLOSUM? Any of MailCheck.ai's 2 actions, including Get domain and Get email. Your agent maps the data both ways and tests every scenario before it ships. ### ### Can it also run from MailCheck.ai to CLOSUM? Yes. When something happens in MailCheck.ai, your agent can act in CLOSUM too. This page covers both directions: MailCheck.ai's triggers and CLOSUM's actions are listed here as well. ### ### Do I have to build a connector for CLOSUM or MailCheck.ai? No. Both are in the catalog with their triggers and actions. You describe the automation; your agent builds it, tests every scenario and keeps it running. ### ### Can my AI client use CLOSUM and MailCheck.ai without building an automation? Yes. With your AI client connected to APIANT, ask it to do something in either app 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. One connection covers both. ### ### 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.