--- title: "Connect Userflow and PostStack - APIANT.ai" description: "When \"Checklist Completed\" fires in Userflow, your agent runs \"Add a contact\" in PostStack." canonical: "https://apiant.ai/connect/userflow-to-poststack" --- # Connect Userflow and PostStack When **Checklist Completed** fires in [Userflow](https://apiant.ai/connections/userflow), your agent runs **Add a contact** in [PostStack](https://apiant.ai/connections/poststack), or **Contact Updated (instant)** in PostStack to **Create/Update User** in Userflow. Describe the whole flow and it is built, tested on every scenario and kept running. Userflow **14** triggers Userflow **5** 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 Userflow 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 Userflow and PostStack can do together ### From Userflow to PostStack - When **Checklist Completed** in Userflow then **Add a contact** in PostStack - When **Checklist Task Completed** in Userflow then **Add contacts to segment** in PostStack ### From PostStack to Userflow - When **Contact Updated (instant)** in PostStack then **Create/Update User** in Userflow - When **New Contact (instant)** in PostStack then **Track Event** in Userflow 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 Userflow and PostStack ## Triggers and actions 21 triggers · 36 actions - Trigger **Checklist Completed** Triggered when a user finishes every task in a Userflow checklist. - Trigger **Checklist Dismissed/Ended** Triggered when a Userflow checklist ends for a user — because they dismissed it, it was completed, or it stopped applying to them. The reason is in checklist_end_reason. - Trigger **Checklist Started** Triggered when a user starts a Userflow checklist. Why it started is in checklist_start_reason. - Trigger **Checklist Task Completed** Triggered when a user completes a single task inside a Userflow checklist. - Trigger **Event Tracked** Triggered when Userflow tracks an event for a user — either your own custom events or Userflow's own flow and checklist events. Name one event to watch, or leave it blank to fire for all of them. - Trigger **Flow Completed** Triggered when a user completes a Userflow flow by reaching its goal step. - Trigger **Flow Dismissed/Ended** Triggered when a Userflow flow ends for a user — because they dismissed it, finished it, or it stopped applying. The reason is in flow_end_reason. - Trigger **Flow Started** Triggered when a user starts a Userflow flow. Why it started is in flow_start_reason. - Trigger **Group Created/Updated** Triggered when a group (a company or account) is created or changed in Userflow. - Trigger **Launcher Activated** Triggered when a user clicks a Userflow launcher (a beacon, button or hotspot) to open it. - Trigger **Launcher Dismissed** Triggered when a user dismisses a Userflow launcher (a beacon, button or hotspot). - Trigger **Launcher Seen** Triggered when a Userflow launcher (a beacon, button or hotspot) is shown to a user. - Trigger **Question Answered** Triggered when a user answers a question in a Userflow flow — a survey, NPS or rating step. The answer arrives as text, a number, or a list depending on the question type. - Trigger **User Created/Updated** Triggered when a user is created or changed in Userflow. - Action **Create/Update Group** Creates a group (a company or account) in Userflow, or updates it if a group with that ID already exists. Only the attributes you send are changed. - Action **Create/Update User** Creates a user in Userflow, or updates them if a user with that ID already exists. Only the attributes you send are changed. Optionally adds the user to a group. - Action **Find Group** Finds groups (companies or accounts) in Userflow by name. Userflow's API cannot filter on the server, so this reads up to 300 groups and matches them here; leave the name blank to just list them. - Action **Find User** Finds users in Userflow by email or name. Userflow's API cannot filter on the server, so this reads up to 300 users and matches them here; leave both fields blank to just list them. - Action **Track Event** Tracks an event for a user in Userflow, so you can use it to start flows or checklists and to segment users. - 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 - [ **Userflow** Userflow is a user onboarding platform, which lets your whole team build customized in-app tours, checklists...](https://apiant.ai/connections/userflow) - [ **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 Userflow - [ **Userflow to Visual Crossing** Global historical and weather forecast data](https://apiant.ai/connect/userflow-to-visual-crossing) - [ **Userflow to Zoom** Zoom unifies cloud video conferencing, simple online meetings, group messaging, and a software-based...](https://apiant.ai/connect/userflow-to-zoom) - [ **Userflow to Webflow** Webflow is a professional website builder and CMS for designing, building, and launching responsive...](https://apiant.ai/connect/userflow-to-webflow) - [ **Userflow to Wix** The Wix website builder gives businesses of any size the tools to create, manage and grow a fully integrated...](https://apiant.ai/connect/userflow-to-wix) - [ **Userflow to LinkedIn** LinkedIn is a professional networking platform enabling job seekers, companies, and thought leaders to...](https://apiant.ai/connect/userflow-to-linkedin) - [ **Userflow to Facebook** Facebook is a social media and advertising platform used by individuals and businesses to connect, share...](https://apiant.ai/connect/userflow-to-facebook) ## 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 ## Userflow and PostStack, answered ### ### What can start an automation from Userflow? Any of Userflow's 14 triggers in the catalog, including Checklist Completed, Checklist Task Completed, Flow Completed and Group Created/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 Userflow? 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 Userflow? Yes. When something happens in PostStack, your agent can act in Userflow too. This page covers both directions: PostStack's triggers and Userflow's actions are listed here as well. ### ### Do I have to build a connector for Userflow 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 Userflow 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.