--- title: "Connect PostStack to Piriod - APIANT.ai" description: "When \"Contact Updated (instant)\" fires in PostStack, your agent runs \"Add contact\" in Piriod." canonical: "https://apiant.ai/connect/poststack-to-piriod" --- # Connect PostStack to Piriod When **Contact Updated (instant)** fires in [PostStack](https://apiant.ai/connections/poststack), your agent runs **Add contact** in [Piriod](https://apiant.ai/connections/piriod). Describe the whole flow and it is built, tested on every scenario and kept running. PostStack **7** triggers PostStack **31** actions Piriod **23** 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 Piriod 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 Piriod - When **Contact Updated (instant)** in PostStack then **Add contact** in Piriod - When **New Contact (instant)** in PostStack then **Add customer** in Piriod 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 Piriod ## Triggers and actions 7 triggers · 54 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 contact** Creates a contact person in Piriod, optionally linked to a customer, who can receive invoice emails and collection reminders. - Action **Add coupon** Creates a discount coupon in Piriod that can be applied to invoices or invoice lines. - Action **Add credit note** Creates a draft credit note that adjusts an existing invoice. - Action **Add customer** Creates a customer in Piriod with their name, address, country and billing preferences. - Action **Add invoice** Creates a draft invoice for a customer with the given lines. Totals are computed by Piriod; finalize it separately to issue it. - Action **Add payment** Creates a payment in Piriod, optionally applied to an invoice, customer or subscription. - Action **Add product** Creates a product in Piriod, which plans can then be priced under. - Action **Add subscription** Creates a recurring subscription for a customer, billing one or more plans on a schedule. - Action **Add usage** Records a usage quantity against a metered subscription line in Piriod. - Action **Cancel subscription** Cancels a Piriod subscription. A subscription with no finalized invoices is deleted outright instead. - Action **Delete customer** Deletes a customer, or archives it when it has invoices, subscriptions or payment history. - Action **Finalize invoice** Finalizes a draft or pending invoice, submitting it to the tax agency where applicable and locking it. Returns the finalized invoice. - Action **Get coupon** Returns a single coupon by its id, including its discount amount, duration and status. - Action **Get credit note** Returns a single credit note, including its lines, amounts and status. - Action **Get customer** Returns a single customer by its id, including address, tax details, contacts, payment sources and balance totals. - Action **Get invoice** Returns a single invoice by its id, including its lines, totals, status and linked payments. - Action **Get subscription** Returns a subscription by its id, including its customer, plan lines, addons, billing dates and status. - Action **List payments** Returns a page of payments in your Piriod workspace, optionally filtered by customer, invoice, status, amount, currency or date. - Action **List products** Returns the products in your Piriod workspace, optionally filtered by name or plan. - Action **List usages** Returns usage records posted against metered subscription lines, optionally filtered by subscription line, date-time or quantity. - Action **Update customer** Updates an existing Piriod customer, changing only the details you fill in. - Action **Update invoice** Updates a draft invoice: change its customer, dates, collection method, lines, discounts or notes. Only draft invoices can be updated. - Action **Update subscription** Updates an existing Piriod subscription, such as its customer, plans, billing dates, collection method or coupon. Only the fields you fill in 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) - [ **Piriod** Subscription management & recurring billing](https://apiant.ai/connections/piriod) 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 Piriod - [ **HubSpot to Piriod** HubSpot is your all-in-one stop for all of your marketing software needs.](https://apiant.ai/connect/hubspot-to-piriod) - [ **Salesforce to Piriod** Salesforce is a leading enterprise customer relationship management (CRM) platform.](https://apiant.ai/connect/salesforce-to-piriod) - [ **Slack to Piriod** Slack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...](https://apiant.ai/connect/slack-to-piriod) - [ **Google Sheets to Piriod** Google Sheets](https://apiant.ai/connect/google-sheets-to-piriod) - [ **Gmail to Piriod** Gmail is Google’s email service, featuring spam protection, search functions, and seamless integration with...](https://apiant.ai/connect/gmail-to-piriod) - [ **Google Calendar to Piriod** Google Calendar is a time management tool providing scheduling features, event reminders, and integration...](https://apiant.ai/connect/google-calendar-to-piriod) Questions ## PostStack and Piriod, 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 Piriod when something happens in PostStack? Any of Piriod's 23 actions, including Update customer, Update invoice, Update subscription and Add contact. Your agent maps the data both ways and tests every scenario before it ships. ### ### Can it also run from Piriod to PostStack? Piriod has no triggers in the catalog today, so automations start in PostStack. If you need the other direction, ask: your agent reads Piriod's API documentation and adds it. ### ### Do I have to build a connector for PostStack or Piriod? 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 Piriod 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.