Integration
Connect Stax to OnceOnly
When List Payment fires in Stax, your agent runs Add event in OnceOnly. 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 OnceOnly 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 OnceOnly
When List Payment in Stax
then Add event in OnceOnly
When List Payment in Stax
then Add policy in OnceOnly
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 OnceOnly
Triggers and actions 1 trigger · 28 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
Add eventAdds an event to an agent run's timeline in OnceOnly, such as a step starting, a tool call, or a failure.
Action
Add policyCreates or updates the governance policy for an agent, such as rate limits, spend limits and allowed or blocked tools.
Action
Add toolCreates or updates a tool in your OnceOnly tool registry, pointing at your backend URL. Returns the saved tool without its secret.
Action
Check & LockChecks an idempotency key and locks it if it is new, telling you whether the event is a first occurrence or a duplicate.
Action
Delete toolPermanently deletes a tool from your OnceOnly tool registry.
Action
Get policyReturns the governance policy configured for an agent.
Action
Get runReturns a run's timeline: the run id, the total number of events and the list of events recorded for it.
Action
Get toolReturns the details of a registered tool by name, including its URL, scope, enabled state and retry settings.
Action
List policiesReturns every agent policy on the OnceOnly account, each with its agent id and policy settings.
Action
List runsReturns the runs recorded on your OnceOnly account, with each run's latest status and event count.
Action
List toolsReturns the tools registered in your OnceOnly tool registry for a scope.
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
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Questions
Stax and OnceOnly, 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 OnceOnly when something happens in Stax?
Any of OnceOnly's 11 actions, including Add event, Add policy, Add tool and Check & Lock. Your agent maps the data both ways and tests every scenario before it ships.
Can it also run from OnceOnly to Stax?
OnceOnly has no triggers in the catalog today, so automations start in Stax. If you need the other direction, ask: your agent reads OnceOnly's API documentation and adds it.
Do I have to build a connector for Stax or OnceOnly?
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 OnceOnly 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.