--- title: "Connect Mixmax to ZUGFeRD & XRechnung by InvoiceXML - APIANT.ai" description: "When \"New message sent\" fires in Mixmax, your agent runs \"Create XRechnung Invoice\" in ZUGFeRD & XRechnung by InvoiceXML." canonical: "https://apiant.ai/connect/mixmax-to-zugferd-xrechnung-by-invoicexml" --- # Connect Mixmax to ZUGFeRD & XRechnung by InvoiceXML When **New message sent** fires in [Mixmax](https://apiant.ai/connections/mixmax), your agent runs **Create XRechnung Invoice** in [ZUGFeRD & XRechnung by InvoiceXML](https://apiant.ai/connections/zugferd-xrechnung-by-invoicexml). Describe the whole flow and it is built, tested on every scenario and kept running. Mixmax **1** trigger Mixmax **13** actions ZUGFeRD & XRechnung by InvoiceXML **8** 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 ZUGFeRD & XRechnung by InvoiceXML 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 can start in ZUGFeRD & XRechnung by InvoiceXML - When **New message sent** in Mixmax then **Create XRechnung Invoice** in ZUGFeRD & XRechnung by InvoiceXML - When **New message sent** in Mixmax then **Create ZUGFeRD Invoice** in ZUGFeRD & XRechnung by InvoiceXML 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 ZUGFeRD & XRechnung by InvoiceXML ## Triggers and actions 1 trigger · 21 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. - Action **Convert XRechnung to PDF** Renders an XRechnung invoice XML file (UBL or CII syntax) into a readable PDF preview. The PDF is for human reading only and has no legal standing. - Action **Create XRechnung Invoice** Generates a validated XRechnung 3.0 e-invoice (UBL by default, or CII) from structured invoice data and returns the XML document. Totals and the VAT breakdown are calculated from the lines unless supplied. - Action **Create ZUGFeRD Invoice** Creates a new ZUGFeRD compliant PDF/A-3b invoice from scratch using the provided invoice data. - Action **Extract Invoice JSON** Reads a structured e-invoice (a Factur-X / ZUGFeRD / Peppol PDF with embedded CII or UBL XML, or a standalone CII or UBL XML file) and returns its data as structured JSON. Pure XML parsing, no AI. - Action **Extract Invoice XML** Pulls the embedded XML invoice out of a hybrid PDF (ZUGFeRD, Factur-X or other PDF/A-3 invoice) and returns it unchanged. - Action **Transform to ZUGFeRD** Turns a plain PDF invoice into a ZUGFeRD 2.x hybrid invoice (PDF/A-3 with embedded XML) using AI extraction. - Action **Validate XRechnung Invoice** Validates a CII XML invoice for XRechnung / EN16931 compliance. - Action **Validate ZUGFeRD Invoice** Validates a ZUGFeRD 2.x hybrid PDF invoice against the official schema and EN 16931 business rules for the profile it declares, and returns whether it is compliant along with any errors and warnings. ## 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) - [ **ZUGFeRD & XRechnung by InvoiceXML** ZUGFeRD & XRechnung by InvoiceXML is a German e-invoice compliance service for creating, validating...](https://apiant.ai/connections/zugferd-xrechnung-by-invoicexml) 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 ZUGFeRD & XRechnung by InvoiceXML - [ **Freshworks CRM to ZUGFeRD & XRechnung by InvoiceXML** Freshworks CRM (Freshsales Suite) — manage contacts, sales accounts, deals, notes, tasks, and appointments.](https://apiant.ai/connect/freshworks-crm-to-zugferd-xrechnung-by-invoicexml) - [ **Open Government, Netherlands to ZUGFeRD & XRechnung by InvoiceXML** Netherlands Government Open Data. Public open-data portal — search dataset catalogs and retrieve published...](https://apiant.ai/connect/open-government-netherlands-to-zugferd-xrechnung-by-invoicexml) - [ **Paperless to ZUGFeRD & XRechnung by InvoiceXML** Paperless lets you create, sign, and manage intelligent documents on a single platform.](https://apiant.ai/connect/paperless-to-zugferd-xrechnung-by-invoicexml) - [ **Smartsheet to ZUGFeRD & XRechnung by InvoiceXML** Smartsheet is a work execution platform for managing sheets, rows, and columns.](https://apiant.ai/connect/smartsheet-to-zugferd-xrechnung-by-invoicexml) - [ **HubSpot to ZUGFeRD & XRechnung by InvoiceXML** HubSpot is your all-in-one stop for all of your marketing software needs.](https://apiant.ai/connect/hubspot-to-zugferd-xrechnung-by-invoicexml) - [ **Salesforce to ZUGFeRD & XRechnung by InvoiceXML** Salesforce is a leading enterprise customer relationship management (CRM) platform.](https://apiant.ai/connect/salesforce-to-zugferd-xrechnung-by-invoicexml) Questions ## Mixmax and ZUGFeRD & XRechnung by InvoiceXML, 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 ZUGFeRD & XRechnung by InvoiceXML when something happens in Mixmax? Any of ZUGFeRD & XRechnung by InvoiceXML's 8 actions, including Create XRechnung Invoice, Create ZUGFeRD Invoice, Convert XRechnung to PDF and Extract Invoice JSON. Your agent maps the data both ways and tests every scenario before it ships. ### ### Can it also run from ZUGFeRD & XRechnung by InvoiceXML to Mixmax? ZUGFeRD & XRechnung by InvoiceXML has no triggers in the catalog today, so automations start in Mixmax. If you need the other direction, ask: your agent reads ZUGFeRD & XRechnung by InvoiceXML's API documentation and adds it. ### ### Do I have to build a connector for Mixmax or ZUGFeRD & XRechnung by InvoiceXML? 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 ZUGFeRD & XRechnung by InvoiceXML 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.