--- title: "Connect Attio and PostStack - APIANT.ai" description: "When \"List Entry Created\" fires in Attio, your agent runs \"Add a contact\" in PostStack." canonical: "https://apiant.ai/connect/attio-to-poststack" --- # Connect Attio and PostStack When **List Entry Created** fires in [Attio](https://apiant.ai/connections/attio), your agent runs **Add a contact** in [PostStack](https://apiant.ai/connections/poststack), or **Contact Updated (instant)** in PostStack to **Create or Update List Entry by Parent Record** in Attio. Describe the whole flow and it is built, tested on every scenario and kept running. Attio **7** triggers Attio **13** actions PostStack **7** triggers PostStack **31** actions What the catalog holds today. Ask for anything missing and your agent reads the API documentation and adds it. ## What do you want Attio and PostStack 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 Attio and PostStack can do together ### From Attio to PostStack - When **List Entry Created** in Attio then **Add a contact** in PostStack - When **List Entry Updated** in Attio then **Add contacts to segment** in PostStack ### From PostStack to Attio - When **Contact Updated (instant)** in PostStack then **Create or Update List Entry by Parent Record** in Attio - When **New Contact (instant)** in PostStack then **Create or Update Record** in Attio 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 Attio and PostStack ## Triggers and actions 14 triggers · 44 actions - Trigger **List Entry Created** Triggered when a record is added to an Attio list. Attio registers and removes the webhook automatically when the automation is turned on and off. - Trigger **List Entry Deleted** Triggers when a record is removed from a list in Attio, giving you the deleted list entry's ID along with the list and the parent record it pointed at. - Trigger **List Entry Updated** Triggers when a list attribute on an existing Attio list entry is changed, giving you the entry, the list, the parent record and the attribute that changed. - Trigger **Record Created** Triggers when a new record is created in Attio, giving you the new record's ID and the object it belongs to. - Trigger **Record Deleted** Triggers when a record is deleted in Attio, giving you the deleted record's ID and the object it belonged to. - Trigger **Record Updated** Triggers when an attribute on an Attio record changes, giving you the record, the object it belongs to and the attribute that changed. - Trigger **Task Created** Triggers when a new task is created in Attio, giving you the new task's ID and who created it. - Action **Create List Entry** Adds a record to an Attio list as a new list entry and returns the entry. - Action **Create Note** Creates a note on an Attio record and returns the new note. - Action **Create or Update List Entry by Parent Record** Adds a record to an Attio list, or updates its existing entry if it is already on the list. - Action **Create or Update Record** Creates a record in Attio, or updates the existing record that matches on the chosen field. - Action **Create Record** Creates a new record on the chosen Attio object and returns it. - Action **Create Storage Location** Attaches a folder to an Attio record — either a folder stored in Attio or one linked from Dropbox, Box, Google Drive or OneDrive. - Action **Create Task** Creates a task in Attio, optionally linked to a record and assigned to a workspace member. - Action **Delete List Entry** Removes an entry from an Attio list. - Action **Find List Entries** Returns the entries on an Attio list. - Action **Find Records** Searches records on the chosen Attio object and returns the matches. - Action **Update List Entry** Updates the list-specific field values on an existing Attio list entry. Fields you leave blank are left untouched. - Action **Update Record** Updates the field values on an existing Attio record. Fields you leave blank are left untouched. - Action **Update Task** Updates an existing Attio task's due date, done state, linked records or assignee. Anything you leave blank stays as it is. Attio does not allow the task's text to be changed. - Trigger **Contact Deleted (instant)** Fires when a contact is deleted (event: contact.deleted). - Trigger **Contact Updated (instant)** Fires when a contact is updated (event: contact.updated). - Trigger **Email Bounced (instant)** Fires when an email bounces (event: email.bounced). - Trigger **Email Delivered (instant)** Fires when an email is delivered (event: email.delivered). - Trigger **New Contact (instant)** Fires when a contact is created (event: contact.created). - Trigger **New Inbound Email** Polls for newly received inbound emails. - Trigger **New Sent Email (instant)** Fires when an email is sent (event: email.sent). - Action **Add a broadcast** Create a new marketing broadcast. - Action **Add a contact** Create a new contact. - Action **Add a segment** Create a new manual contact segment. - Action **Add a template** Create a new email template. - Action **Add contacts to segment** Add contacts to an existing segment. - Action **Add suppression** Add an address to the suppression list. - Action **Cancel broadcast** Cancel an in-flight broadcast. - Action **Cancel email** Cancel a scheduled or queued email before it sends. - Action **Delete a contact** Delete a contact. - Action **Delete a template** Delete an email template. - Action **Get a contact** Fetch one contact by ID. - Action **Get a template** Fetch one email template by ID. - Action **Get broadcast** Retrieve one broadcast by its public id, including the HTML and text bodies that the list endpoint omits. - Action **Get email** Fetch one sent or queued email by ID. - Action **Get email events** Get the delivery event timeline for one email. - Action **Get inbound email** Fetch one received inbound email by ID. - Action **Import contacts** Bulk-import a CSV list of contacts. - Action **List broadcasts** List marketing broadcasts. - Action **List contacts** List contacts in the account. - Action **List emails** List sent, queued, and scheduled emails. - Action **List inbound emails** List emails received via inbound parsing. - Action **List segments** List contact segments. - Action **List suppressed addresses** List addresses on the suppression list. - Action **List templates** List email templates. - Action **Send an email** Send a transactional email through PostStack. - Action **Send broadcast** Start sending a broadcast to its recipients. - Action **Send emails in batch** Send up to 100 emails in a single request. - Action **Update a contact** Update an existing contact's fields. - Action **Update a template** Update an email template, creating a new version. - Action **Update email** Reschedule a queued email's send time. - Action **Validate email address** Check whether an email address is valid and deliverable. ## Each app on its own - [ **Attio** Attio is the CRM of the future: data-driven, completely customizable and intuitively collaborative.](https://apiant.ai/connections/attio) - [ **PostStack** EU-hosted email API for transactional and marketing email, with contacts, broadcasts, and analytics](https://apiant.ai/connections/poststack) Reviews ## What our customers say ## More from Attio - [ **Attio to LinkedIn** LinkedIn is a professional networking platform enabling job seekers, companies, and thought leaders to...](https://apiant.ai/connect/attio-to-linkedin) - [ **Attio to Amplitude** Amplitude is a product analytics service that makes it easier for companies to understand user behavior...](https://apiant.ai/connect/attio-to-amplitude) - [ **Attio to Chargebee** Chargebee is a subscription management and recurring billing solution used by businesses to customize...](https://apiant.ai/connect/attio-to-chargebee) - [ **Attio to Dreamdata** Dreamdata is a B2B revenue attribution platform.](https://apiant.ai/connect/attio-to-dreamdata) - [ **Attio to Fibery** Fibery is the first work management software that fits and grows with your company.](https://apiant.ai/connect/attio-to-fibery) - [ **Attio to Myphoner** Myphoner is a cold calling tool used for lead management and lead tracking, with the focus of creating a...](https://apiant.ai/connect/attio-to-myphoner) ## More into PostStack - [ **HubSpot to PostStack** HubSpot is your all-in-one stop for all of your marketing software needs.](https://apiant.ai/connect/hubspot-to-poststack) - [ **Google Sheets to PostStack** Google Sheets is Google's online spreadsheet app for creating, editing and sharing spreadsheets.](https://apiant.ai/connect/google-sheets-to-poststack) - [ **Gmail to PostStack** Gmail is Google’s email service, featuring spam protection, search functions, and seamless integration with...](https://apiant.ai/connect/gmail-to-poststack) - [ **Google Calendar to PostStack** Google Calendar is a time management tool providing scheduling features, event reminders, and integration...](https://apiant.ai/connect/google-calendar-to-poststack) - [ **Google Drive to PostStack** Google Drive is a cloud storage solution for uploading, sharing, and collaborating on files across devices...](https://apiant.ai/connect/google-drive-to-poststack) - [ **Mailchimp to PostStack** Mailchimp marketing automation and email platform.](https://apiant.ai/connect/mailchimp-to-poststack) Questions ## Attio and PostStack, answered ### ### What can start an automation from Attio? Any of Attio's 7 triggers in the catalog, including List Entry Created, List Entry Updated, Record Created and Record Updated. Describe the moment in plain language and your agent picks the right one. ### ### What can your agent do in PostStack when something happens in Attio? Any of PostStack's 31 actions, including Send an email, Send broadcast, Send emails in batch and Update a contact. Your agent maps the data both ways and tests every scenario before it ships. ### ### Can it also run from PostStack to Attio? Yes. When something happens in PostStack, your agent can act in Attio too. This page covers both directions: PostStack's triggers and Attio's actions are listed here as well. ### ### Do I have to build a connector for Attio or PostStack? 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 Attio and PostStack 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.