--- title: "Connect Buttondown to 44API - APIANT.ai" description: "When \"New Draft\" fires in Buttondown, your agent runs \"Validate VAT Numbers Batch\" in 44API." canonical: "https://apiant.ai/connect/buttondown-to-44api" --- # Connect Buttondown to 44API When **New Draft** fires in [Buttondown](https://apiant.ai/connections/buttondown), your agent runs **Validate VAT Numbers Batch** in [44API](https://apiant.ai/connections/44api). Describe the whole flow and it is built, tested on every scenario and kept running. Buttondown **4** triggers Buttondown **29** actions 44API **3** actions What the catalog holds today. Ask for anything missing and your agent reads the API documentation and adds it. ## What do you want Buttondown and 44API 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 Buttondown can start in 44API - When **New Draft** in Buttondown then **Validate VAT Numbers Batch** in 44API - When **New Scheduled Email** in Buttondown then **Validate VAT Tax Number** in 44API 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 Buttondown and 44API ## Triggers and actions 4 triggers · 32 actions - Trigger **New Draft** Triggers when a new draft is created. - Trigger **New Scheduled Email** Triggers when a new email is scheduled. - Trigger **Newsletters** Triggers when a new newsletter is created. - Trigger **New Tag** Triggers when a new tag is created. - Action **Add Segment** Create a new subscriber segment. - Action **Add Survey** Create a new survey. - Action **Create Draft** Creates a draft. - Action **Create Email** Creates an email. - Action **Create Subscriber** Creates a subscriber. - Action **Delete Automation** Delete an automation by id. - Action **Delete Email** Delete an email by id. - Action **Delete Newsletter** Delete a newsletter by id. - Action **Delete Segment** Delete a subscriber segment by id. - Action **Delete Subscriber** Remove a subscriber by id or email address. - Action **Delete Survey** Delete a survey by id. - Action **Delete Tag** Delete a tag by id. - Action **Find Tag** Finds a tag given its name. - Action **Get Automation** Retrieve a single automation by id. - Action **Get Email** Retrieve a single email by id. - Action **Get Newsletter** Retrieve a single newsletter by id. - Action **Get Segment** Retrieve a single subscriber segment by id. - Action **Get Survey** Retrieve a single survey by id. - Action **Get Tag** Retrieve a single tag by id. - Action **List Automations** List all automations configured on the account. - Action **List Segments** List all subscriber segments. - Action **List Surveys** List all surveys on the account. - Action **Publish Email** Publish a drafted email so it is sent and made public. - Action **Update Automation** Update an automation's configuration. - Action **Update Email** Update an existing email's content or metadata. - Action **Update Newsletter** Update a newsletter's settings. - Action **Update Segment** Update a subscriber segment's definition. - Action **Update Survey** Update a survey's configuration. - Action **Update Tag** Update a tag's name or metadata. - Action **Find VAT Validation** Looks up a VAT number and returns validation result. - Action **Validate VAT Numbers Batch** Validates multiple VAT numbers at once (max 10). - Action **Validate VAT Tax Number** Validates a VAT, GST, or tax ID number and returns company information. Supports 50+ countries including EU, UK, Switzerland, Norway, and more. ## Each app on its own - [ **Buttondown** Buttondown is an easy way to start and grow your newsletter.](https://apiant.ai/connections/buttondown) - [ **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) Reviews ## What our customers say ## More from Buttondown - [ **Buttondown to HelloSalut** HelloSalut returns the word for "hello" in a visitor's own language.](https://apiant.ai/connect/buttondown-to-hellosalut) - [ **Buttondown to Zoho Campaigns** Zoho Campaigns lets you send email and social media campaigns to your subscribers.](https://apiant.ai/connect/buttondown-to-zoho-campaigns) - [ **Buttondown to HubSpot** HubSpot is your all-in-one stop for all of your marketing software needs.](https://apiant.ai/connect/buttondown-to-hubspot) - [ **Buttondown to Salesforce** Salesforce is a leading enterprise customer relationship management (CRM) platform.](https://apiant.ai/connect/buttondown-to-salesforce) - [ **Buttondown to Slack** Slack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...](https://apiant.ai/connect/buttondown-to-slack) - [ **Buttondown to Google Sheets** Google Sheets is Google's online spreadsheet app for creating, editing and sharing spreadsheets.](https://apiant.ai/connect/buttondown-to-google-sheets) ## More into 44API - [ **HubSpot to 44API** HubSpot is your all-in-one stop for all of your marketing software needs.](https://apiant.ai/connect/hubspot-to-44api) - [ **Salesforce to 44API** Salesforce is a leading enterprise customer relationship management (CRM) platform.](https://apiant.ai/connect/salesforce-to-44api) - [ **Slack to 44API** Slack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...](https://apiant.ai/connect/slack-to-44api) - [ **Google Sheets to 44API** Google Sheets is Google's online spreadsheet app for creating, editing and sharing spreadsheets.](https://apiant.ai/connect/google-sheets-to-44api) - [ **Gmail to 44API** Gmail is Google’s email service, featuring spam protection, search functions, and seamless integration with...](https://apiant.ai/connect/gmail-to-44api) - [ **Google Calendar to 44API** Google Calendar is a time management tool providing scheduling features, event reminders, and integration...](https://apiant.ai/connect/google-calendar-to-44api) Questions ## Buttondown and 44API, answered ### ### What can start an automation from Buttondown? Any of Buttondown's 4 triggers in the catalog, including New Draft, New Scheduled Email, New Tag and Newsletters. Describe the moment in plain language and your agent picks the right one. ### ### What can your agent do in 44API when something happens in Buttondown? Any of 44API's 3 actions, including Find VAT Validation, Validate VAT Numbers Batch and Validate VAT Tax Number. Your agent maps the data both ways and tests every scenario before it ships. ### ### Can it also run from 44API to Buttondown? 44API has no triggers in the catalog today, so automations start in Buttondown. If you need the other direction, ask: your agent reads 44API's API documentation and adds it. ### ### Do I have to build a connector for Buttondown or 44API? 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 Buttondown and 44API 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.