--- title: "Connect Quaderno to Maildroppa - APIANT.ai" description: "When \"New Contact\" fires in Quaderno, your agent runs \"Add or Update Subscriber Field (By Email)\" in Maildroppa." canonical: "https://apiant.ai/connect/quaderno-to-maildroppa" --- # Connect Quaderno to Maildroppa When **New Contact** fires in [Quaderno](https://apiant.ai/connections/quaderno), your agent runs **Add or Update Subscriber Field (By Email)** in [Maildroppa](https://apiant.ai/connections/maildroppa). Describe the whole flow and it is built, tested on every scenario and kept running. Quaderno **3** triggers Quaderno **24** actions Maildroppa **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 Quaderno and Maildroppa 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 Quaderno can start in Maildroppa - When **New Contact** in Quaderno then **Add or Update Subscriber Field (By Email)** in Maildroppa - When **New Invoice** in Quaderno then **Add or Update Subscriber Field (By Subscriber ID)** in Maildroppa 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 Quaderno and Maildroppa ## Triggers and actions 3 triggers · 55 actions - Trigger **New Contact** Triggers when a new contact is created in Quaderno. - Trigger **New Invoice** Triggers when a new invoice is created in Quaderno. - Trigger **New Sale** Triggers when a new sale is recorded in Quaderno, i.e. a new invoice or receipt is created. - Action **Add invoice payment** Records a payment against a Quaderno invoice. When total payments reach the invoice amount, the invoice is marked as paid. - Action **Add product** Creates a new product in Quaderno that can be used as a line item on invoices, credit notes and expenses. - Action **Add receipt** Creates a paid receipt in Quaderno for a completed sale, with its customer, line items and payment method. - Action **Calculate tax rate** Calculates the tax rate and tax amount that applies to a sale for a given customer location and product type. - Action **Create Contact** Creates a new contact (customer or vendor) in Quaderno and returns the created contact. - Action **Create Estimate** Creates an estimate (proforma) in Quaderno for a customer, with line items, dates and notes. - Action **Create Expense** Creates an expense in Quaderno for a vendor, with its line items, and returns the new expense. - Action **Create Invoice** Creates an invoice for a customer with line items; optionally records full payment so the invoice is marked paid. - Action **Create Paid Invoice** Creates an invoice for a customer and records a full payment against it, so the invoice is marked paid. - Action **Create Sale** Records a sale in Quaderno, which calculates taxes and issues the matching invoice or receipt for the customer. - Action **Delete contact** Permanently deletes a contact (customer or vendor) from your Quaderno account. - Action **Find Contact** Finds contacts whose name, email or tax ID matches the search text, or whose payment-processor ID matches. - Action **Find Sale** Finds sales (invoices) by invoice number, customer name or PO number, payment processor transaction id, customer, state or issue date range, and returns the matches. - Action **Get contact** Returns a single Quaderno contact (customer or vendor) by its ID. - Action **Get Estimate** Returns a single estimate (proforma) by its id, including its number, customer, line items, taxes and totals. - Action **Get Expense** Returns the details of an existing expense in your Quaderno account. - Action **Get invoice** Returns a single invoice by its id, including number, contact, line items, taxes, totals and payments. - Action **Get product** Returns a single product (item) from your Quaderno account by its id, including its name, code, price and tax settings. - Action **Get Receipt** Returns a receipt by its id, including number, totals, taxes, contact and payment details. - Action **Update contact** Updates an existing Quaderno contact. Fields left blank keep their current values. - Action **Update invoice** Updates the editable fields of an existing invoice: PO number, tags, payment details, notes, custom metadata and billing address. - Action **Update product** Updates an existing product in Quaderno. Only the fields you fill in are changed. - Action **Validate tax ID** Checks whether a customer's tax ID (EU/UK VAT, ABN, NZBN, QST, Swiss UID) is valid and belongs to a real business. - Action **Void invoice** Voids an existing invoice in Quaderno and returns the voided invoice. - Action **Add or Update Subscriber Field (By Email)** Sets (replaces) one custom field value on the subscriber with the given email address. - Action **Add or Update Subscriber Field (By Subscriber ID)** Sets or replaces one custom field value on a subscriber identified by subscriber ID. - Action **Assign Subscriber Tag (By Email)** Assigns a customer tag to the subscriber with the given email address. - Action **Assign Subscriber Tag (By Subscriber ID)** Assigns one of your active customer tags to a subscriber, identified by subscriber ID. Assigning a tag the subscriber already has does nothing. - Action **Count Subscribers (Filtered)** Returns the number of subscribers matching a set of segment conditions, optionally limited to one subscriber status. - Action **Create Field Type** Creates a custom subscriber field in Maildroppa, such as a text, number, date or choice field. - Action **Create Segment** Creates a subscriber segment in Maildroppa from a set of field, tag, topic, segment or purchase conditions. - Action **Create Tag** Creates a new tag in Maildroppa that can be assigned to subscribers and used in segments. - Action **Delete All Subscribers (Optionally by Status)** Deletes all subscribers in the account, optionally only those with a given status. Deletion runs in the background. - Action **Delete Field Type** Archives a customer-created subscriber field so it is no longer active. - Action **Delete Segment** Deletes a segment from your Maildroppa account. Segments still in use cannot be deleted. - Action **Delete Subscriber by Email** Deletes a subscriber from your Maildroppa audience, identified by their email address. - Action **Delete Subscriber by ID** Deletes a single subscriber from your Maildroppa account by their subscriber ID. - Action **Delete Subscriber Field (By Email)** Clears the value of one subscriber field for the subscriber with the given email address. - Action **Delete Subscriber Field (By Subscriber ID)** Clears the value of one subscriber field for the subscriber with the given ID. - Action **Delete Subscribers (Bulk)** Deletes several Maildroppa subscribers at once by their subscriber IDs. - Action **Delete Subscriber Tag (By Email)** Removes a customer tag from the subscriber with the given email address. - Action **Delete Subscriber Tag (By Subscriber ID)** Removes a tag from a subscriber identified by their subscriber ID. - Action **Delete Tag** Deletes (archives) a customer tag in Maildroppa so it can no longer be assigned. An archived tag can be restored later. - Action **Find Subscriber by Email** Finds a subscriber by their exact email address and returns their details. - Action **Get Segment by ID** Returns one Maildroppa segment by its ID, including its name and filter conditions. - Action **Get Subscriber by ID** Returns a subscriber by ID, including field values, tags, status and registration details. - Action **List Field Types (Paged)** Returns all subscriber fields in the Maildroppa account, both built-in and custom, including field types and choice options. - Action **List Filtered Subscribers (Paged)** Returns one page of subscribers matching a filter of field, tag, topic, segment or purchase conditions. - Action **List Tags** Returns the tags in your Maildroppa account, including system-managed tags, optionally with archived ones. - Action **Request Double Opt‑In** Starts double opt-in for a new subscriber by sending them a confirmation email. Their profile, tags and topics are applied once they confirm. - Action **Update Field Type** Updates a custom subscriber field's label, required flag, internal visibility, position and choice options. - Action **Update Segment** Replaces a segment's name and rules in Maildroppa. - Action **Update Subscriber** Updates a subscriber's email, first name, status, custom field values and tags. Values left blank keep the subscriber's current data. - Action **Update Subscriber Email** Changes the email address of an existing Maildroppa subscriber. - Action **Update Tag** Renames an existing customer tag in Maildroppa and returns the updated tag. ## Each app on its own - [ **Quaderno** Quaderno is a tax software that handles sales tax, VAT, and GST for your online business.](https://apiant.ai/connections/quaderno) - [ **Maildroppa** Maildroppa is a B2B email-marketing platform that lets you create, send and track campaigns, manage...](https://apiant.ai/connections/maildroppa) Reviews ## What our customers say ## More from Quaderno - [ **Quaderno to Hyperstack Certificates** Hyperstack helps you easily create and manage digital certificates & badges for your events or courses.](https://apiant.ai/connect/quaderno-to-hyperstack-certificates) - [ **Quaderno to Salesforce** Salesforce is a leading enterprise customer relationship management (CRM) platform.](https://apiant.ai/connect/quaderno-to-salesforce) - [ **Quaderno to Slack** Slack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...](https://apiant.ai/connect/quaderno-to-slack) - [ **Quaderno to Stripe** Stripe is a payment processing platform for online businesses.](https://apiant.ai/connect/quaderno-to-stripe) - [ **Quaderno to Shopify** Shopify is a commerce platform for online stores and retail point-of-sale.](https://apiant.ai/connect/quaderno-to-shopify) - [ **Quaderno to QuickBooks Online** QuickBooks Online accounting — manage customers, invoices, bills, payments, vendors, expenses, and more via...](https://apiant.ai/connect/quaderno-to-quickbooks-online) ## More into Maildroppa - [ **HubSpot to Maildroppa** HubSpot is your all-in-one stop for all of your marketing software needs.](https://apiant.ai/connect/hubspot-to-maildroppa) - [ **Salesforce to Maildroppa** Salesforce is a leading enterprise customer relationship management (CRM) platform.](https://apiant.ai/connect/salesforce-to-maildroppa) - [ **Slack to Maildroppa** Slack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...](https://apiant.ai/connect/slack-to-maildroppa) - [ **Google Sheets to Maildroppa** Google Sheets](https://apiant.ai/connect/google-sheets-to-maildroppa) - [ **Gmail to Maildroppa** Gmail is Google’s email service, featuring spam protection, search functions, and seamless integration with...](https://apiant.ai/connect/gmail-to-maildroppa) - [ **Google Calendar to Maildroppa** Google Calendar is a time management tool providing scheduling features, event reminders, and integration...](https://apiant.ai/connect/google-calendar-to-maildroppa) Questions ## Quaderno and Maildroppa, answered ### ### What can start an automation from Quaderno? Any of Quaderno's 3 triggers in the catalog, including New Contact, New Invoice and New Sale. Describe the moment in plain language and your agent picks the right one. ### ### What can your agent do in Maildroppa when something happens in Quaderno? Any of Maildroppa's 31 actions, including Create Field Type, Create Segment, Create Tag and Update Field Type. Your agent maps the data both ways and tests every scenario before it ships. ### ### Can it also run from Maildroppa to Quaderno? Maildroppa has no triggers in the catalog today, so automations start in Quaderno. If you need the other direction, ask: your agent reads Maildroppa's API documentation and adds it. ### ### Do I have to build a connector for Quaderno or Maildroppa? 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 Quaderno and Maildroppa 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.