--- title: "Connect Mixmax and PostStack - APIANT.ai" description: "When \"New message sent\" fires in Mixmax, your agent runs \"Add a contact\" in PostStack." canonical: "https://apiant.ai/connect/mixmax-to-poststack" --- # Connect Mixmax and PostStack When **New message sent** fires in [Mixmax](https://apiant.ai/connections/mixmax), your agent runs **Add a contact** in [PostStack](https://apiant.ai/connections/poststack), or **Contact Updated (instant)** in PostStack to **Add contact** in Mixmax. Describe the whole flow and it is built, tested on every scenario and kept running. Mixmax **1** trigger Mixmax **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 Mixmax 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 Mixmax and PostStack can do together ### From Mixmax to PostStack - When **New message sent** in Mixmax then **Add a contact** in PostStack - When **New message sent** in Mixmax then **Add contacts to segment** in PostStack ### From PostStack to Mixmax - When **Contact Updated (instant)** in PostStack then **Add contact** in Mixmax - When **New Contact (instant)** in PostStack then **List contacts** in Mixmax 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 Mixmax and PostStack ## Triggers and actions 8 triggers · 44 actions - Trigger **New message sent** Triggers when a Mixmax message (email) has been sent. Draft, scheduled and failed messages are skipped. - Action **Add contact** Creates a Mixmax contact, or updates your existing contact with the same email address. - Action **Add sequence recipient** Adds a recipient to a Mixmax sequence and starts sending the sequence to them, and returns whether they were added. - Action **Add unsubscribe** Adds one or more email addresses to your Mixmax unsubscribe list, or your workspace's list if you belong to one, so sequences stop sending to them. - Action **Find sequences by name** Returns the Mixmax sequences whose name matches the text you supply. - Action **Get message** Returns one Mixmax message by its ID, including its recipients, subject, tracking settings and send status. An error occurs if the message is not found. - Action **List calls** Returns calls placed with the Mixmax Dialer, newest first, optionally filtered to calls with or without recordings or widened to the whole workspace. - Action **List contacts** Returns the contacts you own in Mixmax, newest first, optionally filtered by a search on name, email, group or Salesforce account. - Action **List messages** Returns your Mixmax messages (drafts, scheduled, sent, or failed), newest first. - Action **List sequence recipients** Returns the recipients that were added to a Mixmax sequence, with each recipient's state and per-stage activity. - Action **List sequences** Returns the Mixmax sequences you can access, optionally filtered by name or folder. - Action **List tasks** Returns the Mixmax tasks (email, call, LinkedIn and to-do) visible to the connected user, optionally filtered and sorted. - Action **List templates** Returns the email templates you can access in Mixmax, optionally filtered by name, subject, folder or owner. - Action **Send message** Sends a saved Mixmax draft message, optionally updating its properties first. The message is queued and delivered shortly after. - 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 - [ **Mixmax** Mixmax’s mission is to do the impossible with email including scheduling meetings, completing surveys...](https://apiant.ai/connections/mixmax) - [ **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 Mixmax - [ **Mixmax to Salesforce** Salesforce is a leading enterprise customer relationship management (CRM) platform.](https://apiant.ai/connect/mixmax-to-salesforce) - [ **Mixmax to Slack** Slack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...](https://apiant.ai/connect/mixmax-to-slack) - [ **Mixmax to Stripe** Stripe is a payment processing platform for online businesses.](https://apiant.ai/connect/mixmax-to-stripe) - [ **Mixmax to Shopify** Shopify is a commerce platform for online stores and retail point-of-sale.](https://apiant.ai/connect/mixmax-to-shopify) - [ **Mixmax to QuickBooks Online** QuickBooks Online accounting — manage customers, invoices, bills, payments, vendors, expenses, and more via...](https://apiant.ai/connect/mixmax-to-quickbooks-online) - [ **Mixmax to Pipedrive** Pipedrive is a sales CRM and pipeline management tool.](https://apiant.ai/connect/mixmax-to-pipedrive) ## 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 ## Mixmax and PostStack, answered ### ### What can start an automation from Mixmax? Any of Mixmax's 1 trigger in the catalog, including New message sent. Describe the moment in plain language and your agent picks the right one. ### ### What can your agent do in PostStack when something happens in Mixmax? 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 Mixmax? Yes. When something happens in PostStack, your agent can act in Mixmax too. This page covers both directions: PostStack's triggers and Mixmax's actions are listed here as well. ### ### Do I have to build a connector for Mixmax 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 Mixmax 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.