# Connect PostStack to Arca When **Contact Updated (instant)** fires in [PostStack](https://apiant.ai/connections/poststack), your agent runs **Create Task** in [Arca](https://apiant.ai/connections/arca). Describe the whole flow and it is built, tested on every scenario and kept running. PostStack **7** triggers PostStack **31** actions Arca **26** actions What the catalog holds today. Ask for anything missing and your agent reads the API documentation and adds it. ## What do you want PostStack and Arca to do together? Give your AI client this address. `https://mcp.apiant.ai` 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 PostStack can start in Arca - When **Contact Updated (instant)** in PostStack then **Create Task** in Arca - When **New Contact (instant)** in PostStack then **Create Comment** in Arca 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 PostStack and Arca ## Triggers and actions 7 triggers · 57 actions - 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. - Action **Create Comment** Posts a new top-level comment on a task. - Action **Create Folder** Creates a new folder in a workspace. - Action **Create Label** Creates a new label in a workspace. - Action **Create List** Creates a new list inside a folder. - Action **Create Status** Creates a new status in a workspace. - Action **Create Task** Creates a new task in a workspace. - Action **Delete Folder** Permanently deletes a folder and all lists and tasks inside it. - Action **Delete Label** Permanently deletes a label from a workspace. - Action **Delete List** Permanently deletes a list and all tasks inside it. - Action **Delete Status** Permanently deletes a status from a workspace. - Action **Delete Task** Permanently deletes a task. - Action **Get Task** Returns a single task with full details including its status, assignees, and attachments. - Action **Get Workspace** Returns a single workspace by its ID. - Action **List Folders** Returns all folders in a workspace, ordered by position then name. - Action **List Labels** Returns all labels defined in a workspace, ordered alphabetically by name. - Action **List Lists** Returns all lists in a workspace, ordered by position then name. - Action **List Statuses** Returns all statuses defined in a workspace, ordered by position. - Action **List Task Comments** Returns all comments on a task, ordered by creation date (oldest first). - Action **List Tasks** Returns a paginated list of top-level tasks in a workspace, ordered by creation date (newest first). - Action **List Workspace Members** Returns all members of a workspace, ordered by join date (oldest first). - Action **List Workspaces** Returns all workspaces the API key owner belongs to, ordered alphabetically by name. - Action **Update Folder** Updates one or more properties of a folder. Only the fields you include are changed. - Action **Update Label** Updates one or more properties of a label. Only the fields you include are changed. - Action **Update List** Updates one or more properties of a list. Only the fields you include are changed. - Action **Update Status** Updates one or more properties of a status. Only the fields you include are changed. - Action **Update Task** Updates one or more fields of a task. Only the fields you include are changed. ## Each app on its own - [ **PostStack** EU-hosted email API for transactional and marketing email, with contacts, broadcasts, and analytics](https://apiant.ai/connections/poststack) - [ **Arca** Arca is a task management app that helps teams organize, assign, and track work from start to finish.](https://apiant.ai/connections/arca) Reviews ## What our customers say ## More from PostStack - [ **PostStack to Salesforce** Salesforce is a leading enterprise customer relationship management (CRM) platform.](https://apiant.ai/connect/poststack-to-salesforce) - [ **PostStack to Slack** Slack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...](https://apiant.ai/connect/poststack-to-slack) - [ **PostStack to Stripe** Stripe is a payment processing platform for online businesses.](https://apiant.ai/connect/poststack-to-stripe) - [ **PostStack to Shopify** Shopify is a commerce platform for online stores and retail point-of-sale.](https://apiant.ai/connect/poststack-to-shopify) - [ **PostStack to QuickBooks Online** QuickBooks Online accounting — manage customers, invoices, bills, payments, vendors, expenses, and more via...](https://apiant.ai/connect/poststack-to-quickbooks-online) - [ **PostStack to Trello** Trello is a visual collaboration tool that organizes projects into boards, lists, and cards.](https://apiant.ai/connect/poststack-to-trello) ## More into Arca - [ **HubSpot to Arca** HubSpot is your all-in-one stop for all of your marketing software needs.](https://apiant.ai/connect/hubspot-to-arca) - [ **Salesforce to Arca** Salesforce is a leading enterprise customer relationship management (CRM) platform.](https://apiant.ai/connect/salesforce-to-arca) - [ **Slack to Arca** Slack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...](https://apiant.ai/connect/slack-to-arca) - [ **Google Sheets to Arca** Google Sheets](https://apiant.ai/connect/google-sheets-to-arca) - [ **Gmail to Arca** Gmail is Google’s email service, featuring spam protection, search functions, and seamless integration with...](https://apiant.ai/connect/gmail-to-arca) - [ **Google Calendar to Arca** Google Calendar is a time management tool providing scheduling features, event reminders, and integration...](https://apiant.ai/connect/google-calendar-to-arca) Questions ## PostStack and Arca, answered ### ### What can start an automation from PostStack? Any of PostStack's 7 triggers in the catalog, including Contact Updated (instant), New Contact (instant), New Inbound Email and New Sent Email (instant). Describe the moment in plain language and your agent picks the right one. ### ### What can your agent do in Arca when something happens in PostStack? Any of Arca's 26 actions, including Create Comment, Create Folder, Create Label and Create List. Your agent maps the data both ways and tests every scenario before it ships. ### ### Can it also run from Arca to PostStack? Arca has no triggers in the catalog today, so automations start in PostStack. If you need the other direction, ask: your agent reads Arca's API documentation and adds it. ### ### Do I have to build a connector for PostStack or Arca? 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. ### ### 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.