--- title: "Connect PostStack to respond.io - APIANT.ai" description: "When \"Contact Updated (instant)\" fires in PostStack, your agent runs \"Create Contact\" in respond.io." canonical: "https://apiant.ai/connect/poststack-to-respond-io" --- # Connect PostStack to respond.io When **Contact Updated (instant)** fires in [PostStack](https://apiant.ai/connections/poststack), your agent runs **Create Contact** in [respond.io](https://apiant.ai/connections/respond-io). Describe the whole flow and it is built, tested on every scenario and kept running. PostStack **7** triggers PostStack **31** actions respond.io **28** 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 respond.io 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 PostStack can start in respond.io - When **Contact Updated (instant)** in PostStack then **Create Contact** in respond.io - When **New Contact (instant)** in PostStack then **Create or Update Contact** in respond.io 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 respond.io ## Triggers and actions 7 triggers · 59 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 **Add Comment** Adds an internal comment to a contact's conversation. - Action **Add Space Tag** Creates a tag in the workspace. - Action **Add Tags** Adds tags to a contact. - Action **Create Contact** Creates a contact. Allow a short delay before acting on the new contact, as respond.io processes it first. - Action **Create Custom Field** Creates a contact custom field. - Action **Create or Update Contact** Creates a contact, or updates it when one with that email or phone already exists. - Action **Delete Contact** Deletes a contact. - Action **Delete Space Tag** Deletes a workspace tag. - Action **Find Contact** Finds a contact by ID, email or phone number. - Action **Find Contact Channels** Returns the channels a contact is connected through. - Action **Find Custom Field** Finds a contact custom field by ID. - Action **Find Message** Finds a message of a contact by its ID. - Action **Find User** Finds a workspace user by ID. - Action **Get All Channels** Returns every channel in the workspace. - Action **Get All Closing Notes** Returns the closing note categories of the workspace. - Action **Get All Custom Fields** Returns every contact custom field in the workspace. - Action **Get All Message Templates** Returns the message templates of a channel, such as WhatsApp templates. - Action **Get All Users** Returns every user in the workspace. - Action **Get Many Contacts** Returns the contacts matching a search text and filter conditions. - Action **Get Many Messages** Returns the messages of a contact's conversation. - Action **Merge Contacts** Merges two contacts into one, keeping the field values you give. - Action **Open or Close Conversation** Opens or closes a contact's conversation, with an optional closing note. - Action **Remove Contact Lifecycle** Removes a contact's lifecycle stage. - Action **Remove Tags** Removes tags from a contact. - Action **Send Message** Sends a text message or a file to a contact. - Action **Update Contact** Updates a contact's fields. Fields left blank keep their current value. - Action **Update Contact Lifecycle** Sets a contact's lifecycle stage. - Action **Update Space Tag** Updates a workspace tag. ## 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) - [ **respond.io** respond.io unifies customer communication across instant messaging, web chat, and email for organizations...](https://apiant.ai/connections/respond-io) 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 respond.io - [ **HubSpot to respond.io** HubSpot is your all-in-one stop for all of your marketing software needs.](https://apiant.ai/connect/hubspot-to-respond-io) - [ **Salesforce to respond.io** Salesforce is a leading enterprise customer relationship management (CRM) platform.](https://apiant.ai/connect/salesforce-to-respond-io) - [ **Slack to respond.io** Slack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...](https://apiant.ai/connect/slack-to-respond-io) - [ **Google Sheets to respond.io** Google Sheets is Google's online spreadsheet app for creating, editing and sharing spreadsheets.](https://apiant.ai/connect/google-sheets-to-respond-io) - [ **Gmail to respond.io** Gmail is Google’s email service, featuring spam protection, search functions, and seamless integration with...](https://apiant.ai/connect/gmail-to-respond-io) - [ **Google Calendar to respond.io** Google Calendar is a time management tool providing scheduling features, event reminders, and integration...](https://apiant.ai/connect/google-calendar-to-respond-io) Questions ## PostStack and respond.io, 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 respond.io when something happens in PostStack? Any of respond.io's 28 actions, including Create Contact, Create Custom Field, Create or Update Contact and Send Message. Your agent maps the data both ways and tests every scenario before it ships. ### ### Can it also run from respond.io to PostStack? respond.io has no triggers in the catalog today, so automations start in PostStack. If you need the other direction, ask: your agent reads respond.io's API documentation and adds it. ### ### Do I have to build a connector for PostStack or respond.io? 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 PostStack and respond.io 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.