Build solutions, not workarounds.
What do you want Xero and Lettr 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 Xero can start in Lettr
When New bill in Xero
then Add contact in Lettr
When New or updated contact in Xero
then Add contact to list in Lettr
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 Xero and Lettr
Triggers and actions 4 triggers · 37 actions
Trigger
New billTriggered when a new bill (ACCPAY) is added.
Trigger
New or updated contactTriggered when a contact is created or updated.
Trigger
New paymentTriggered when a new payment is received.
Trigger
New sales invoiceTriggered when a new sales invoice (ACCREC) is added.
Action
Add accountCreate a chart of accounts entry.
Action
Add credit noteCreate a credit note.
Action
Add itemCreate an inventory/sales item.
Action
Add purchase orderCreate a purchase order.
Action
Add quoteCreate a quote.
Action
Create bank transactionCreate a spend or receive money bank transaction.
Action
Create billCreate a new bill (Accounts Payable, Type=ACCPAY).
Action
Create or update contactCreate a new contact or update an existing one.
Action
Create paymentCreate a payment against an approved invoice.
Action
Create sales invoiceCreate a new sales invoice (Accounts Receivable, Type=ACCREC).
Action
Find contact by emailFind a contact by email address.
Action
Get contactRetrieve a single contact by ContactID.
Action
Get invoiceRetrieve a single invoice by InvoiceID.
Action
Get quoteReturns one quote by its id, with its contact, status, line items and totals.
Action
List accountsRetrieve the chart of accounts.
Action
List bank transactionsList bank transactions.
Action
List contactsRetrieve contacts from Xero.
Action
List credit notesList credit notes.
Action
List invoicesRetrieve sales invoices and bills.
Action
List itemsList items.
Action
List organisationsRetrieve organisation details for the connected Xero tenant.
Action
List paymentsRetrieve payments.
Action
List purchase ordersList purchase orders.
Action
List tax ratesList tax rates.
Action
Update contactUpdate a contact by id.
Action
Update invoiceUpdate a draft/submitted invoice.
Action
Add audience listCreates a new audience list in Lettr with the given name and returns the created list.
Action
Add contactAdds a new contact to your Lettr audience, optionally placing it on a list, setting custom properties, and sending a double opt-in confirmation email.
Action
Add contact to listAdds an existing contact to one of your audience lists. Succeeds whether the contact was newly added or was already on the list.
Action
Add templateCreates a new email template in Lettr from HTML or Topol editor JSON content, and publishes its first version with the merge tags found in the content.
Action
Delete contactPermanently deletes a contact from your Lettr audience.
Action
Get contactReturns a single audience contact, including its subscription status, custom properties, lists and topics.
Action
Get templateReturns a single email template by its slug, including its HTML, editor content, purpose, status and version details.
Action
List audience listsReturns all audience lists in your Lettr team, with each list's name and contact count.
Action
List contactsReturns the contacts in your Lettr audience, optionally narrowed by a search term, subscription status, list or segment.
Action
List templatesReturns the email templates in a Lettr project, optionally limited to one folder or to transactional or campaign templates.
Action
Update contactUpdates an existing contact in your Lettr audience, changing its email address, subscription status or custom properties. Fields left blank are not changed.
No trigger or action matches that. Ask your agent to add it: it reads the API documentation and builds what you describe.
Each app on its own
Reviews
What our customers say
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Questions
Xero and Lettr, answered
What can start an automation from Xero?
Any of Xero's 4 triggers in the catalog, including New bill, New or updated contact, New payment and New sales invoice. Describe the moment in plain language and your agent picks the right one.
What can your agent do in Lettr when something happens in Xero?
Any of Lettr's 11 actions, including Update contact, Add audience list, Add contact and Add contact to list. Your agent maps the data both ways and tests every scenario before it ships.
Can it also run from Lettr to Xero?
Lettr has no triggers in the catalog today, so automations start in Xero. If you need the other direction, ask: your agent reads Lettr's API documentation and adds it.
Do I have to build a connector for Xero or Lettr?
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 Xero and Lettr 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.