Integration
Connect Stax to Factur-X by InvoiceXML
When List Payment fires in Stax, your agent runs Create Factur-X Invoice in Factur-X by InvoiceXML. Describe the whole flow and it is built, tested on every scenario and kept running.
What the catalog holds today. Ask for anything missing and your agent reads the API documentation and adds it.
Build solutions, not workarounds.
What do you want Stax and Factur-X by InvoiceXML to do together?
Ask the assistant
Connect your AI client
Give your AI client this address.
https://mcp.apiant.aiOne 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.aiStart Claude Code there, approve the server, and sign in in the browser page it opens.
Claude Code guide (opens in a new tab)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)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)Zed
Open Settings, then AI, then MCP Servers, then Add Server, then Add Remote Server.
Setup guide (opens in a new tab)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)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)Example flows
What Stax can start in Factur-X by InvoiceXML
When List Payment in Stax
then Create Factur-X Invoice in Factur-X by InvoiceXML
When List Payment in Stax
then Extract Invoice JSON in Factur-X 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 Stax and Factur-X by InvoiceXML
Triggers and actions 1 trigger · 27 actions
Trigger
List PaymentTriggers when a new payment transaction is recorded in Stax.
Action
Capture paymentCaptures funds from a pre-authorized Stax transaction, turning the pre-authorization into a completed charge. Returns the updated transaction.
Action
Create CustomerCreates a customer record on the Stax merchant account and returns the new customer.
Action
Create ItemCreates an item in the merchant's Stax catalog and returns the new catalog item.
Action
Create Scheduled InvoiceCreates a scheduled invoice that automatically generates invoices for a customer on a one-time or recurring schedule, with optional autopay. Returns the new schedule.
Action
Delete Catalog ItemDeletes a catalog item from Stax.
Action
Delete payment methodDeletes a customer's saved payment method in Stax and returns the deleted payment method.
Action
Delete Scheduled InvoiceDeletes a recurring invoice schedule so it stops generating invoices.
Action
Find CustomersSearches your Stax customers by name, email, company, phone, address or other details and returns the matching customers.
Action
Find InvoicesReturns the invoices on the Stax merchant account that match the search criteria you supply, such as keywords, customer name, company, email, price, schedule or payment method.
Action
Find ItemsSearches the merchant's catalog for items matching a name, code, price or other criteria and returns the matching items.
Action
Find Payment MethodsReturns all saved payment methods (cards and bank accounts) for a Stax customer.
Action
Find PaymentsReturns the payments and other transactions on the merchant account that match the search criteria, such as keywords, customer, date range, amount, type or status.
Action
Make a PaymentCharges a customer's saved payment method for the amount you specify, or places a pre-authorization to capture later. Returns the resulting transaction.
Action
Refund paymentRefunds all or part of a settled Stax payment transaction back to the customer.
Action
Update customerUpdates an existing customer's contact details, address, notes and options in Stax, and returns the updated customer.
Action
Update invoiceUpdates an existing unpaid invoice's customer, amounts, line items, memos and payment options, and returns the updated invoice. Fully paid invoices cannot be edited.
Action
Void paymentVoids a payment transaction in Stax before it settles, cancelling the charge.
Action
Convert CII XML to Factur-XConverts a CII XML invoice into a Factur-X compliant PDF/A-3 with the XML embedded. The API generates a visual PDF rendering of the invoice and packages it with the source CII XML.
Action
Convert Factur-X PDF to CIIExtracts the embedded CII (UN/CEFACT Cross Industry Invoice) XML from a Factur-X PDF and returns it as a standalone XML file.
Action
Convert Factur-X PDF to UBLExtracts the embedded CII XML from a Factur-X PDF and converts it to UBL (Universal Business Language) XML.
Action
Convert UBL XML to Factur-XConverts a UBL XML invoice into a Factur-X compliant PDF/A-3. The API maps UBL to CII, generates a visual PDF rendering, and embeds the CII XML in the PDF/A-3 container.
Action
Create Factur-X InvoiceBuilds a Factur-X invoice from structured header, party, payment, and line-item data, then returns a ready-to-deliver PDF/A-3b file.
Action
Embed XML Into PDF (Factur-X)Takes a PDF and a CII XML and produces a Factur-X compliant PDF/A-3 with the XML attached as factur-x.xml. Use this when you already have both the visual PDF and the structured XML of an invoice and just need the hybrid wrapper.
Action
Extract Invoice JSONPulls invoice fields from a PDF into structured JSON, preferring embedded Factur-X XML when present and falling back to intelligent extraction when not.
Action
Extract Invoice XMLRetrieves machine-readable invoice XML from a PDF, returning embedded Factur-X XML directly or generating compliant XML when none is embedded.
Action
Render CII as PDFRenders a CII (UN/CEFACT Cross Industry Invoice) XML document into a human-readable PDF. The output is a visual PDF, not a Factur-X hybrid file.
Action
Validate Factur-X InvoiceChecks whether a Factur-X invoice is structurally and semantically valid, including schema status, conformance level, and rule-level issues.
No trigger or action matches that. Ask your agent to add it: it reads the API documentation and builds what you describe.
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Questions
Stax and Factur-X by InvoiceXML, answered
What can start an automation from Stax?
Any of Stax's 1 trigger in the catalog, including List Payment. Describe the moment in plain language and your agent picks the right one.
What can your agent do in Factur-X by InvoiceXML when something happens in Stax?
Any of Factur-X by InvoiceXML's 10 actions, including Create Factur-X Invoice, Convert CII XML to Factur-X, Convert Factur-X PDF to CII and Convert Factur-X PDF to UBL. Your agent maps the data both ways and tests every scenario before it ships.
Can it also run from Factur-X by InvoiceXML to Stax?
Factur-X by InvoiceXML has no triggers in the catalog today, so automations start in Stax. If you need the other direction, ask: your agent reads Factur-X by InvoiceXML's API documentation and adds it.
Do I have to build a connector for Stax or Factur-X 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 Stax and Factur-X 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.