Commerce & Payments · Integration
Maxio
Add Maxio to your product for your customers, and give your AI agents governed access to it.
Embed a Maxio integration so subscription and usage billing runs in the customer's own Maxio site while your product stays the place the work happens. Customers, subscriptions, products, components and invoices are read and written per tenant, so a plan change made in your product and one made in Maxio do not drift apart. Writes are idempotent, which is the whole point in billing: a retry after a timeout must not duplicate an invoice or double-count usage. Each customer's catalogue, pricing and billing periods are per-tenant configuration rather than code, and fastn owns the credentials, retries and API upkeep.
In your product
Embedded for your customers. Per-tenant auth, no per-customer code, maintained by fastn.
Let customers connect their own Maxio site so subscriptions, invoices and usage components are read and written inside your product.
Report usage against a component so metered charges are billed from what your product actually measured.
React to a subscription change, a new invoice or a failed payment with an event trigger so entitlement and dunning follow immediately.
Support each customer's own product catalogue, pricing and billing periods as per-tenant configuration.
For your AI agents
Governed, audited access for the agents you build, through the MCP server.
An agent explains a customer's next invoice from their own subscription and usage records.
An agent applies an approved plan change or credit within scoped permissions, idempotently and audited.
An agent flags subscriptions heading for a failed renewal and explains why.
Example prompt
What will this account be invoiced for next in Maxio, and which usage is driving it?
Set up Maxio in 4 steps
- 01Enable the Maxio connector in your fastn dashboard.
- 02Have each customer authorise their own Maxio site so calls run under their credentials.
- 03Map the subscription, component and invoice fields your product uses, then enable triggers.
- 04Call it from your product and expose the same connection to your agents through the MCP gateway.
Why teams use the Maxio integration
What you get by embedding it with fastn instead of building it yourself.
- Ship a Maxio integration without building it. Your customers connect their own Maxio account inside your product and work their orders, payments and customers there, with no per-customer code on your side.
- Handle the part that actually costs time: money and order state must never be double-applied, and reconciliation has to be possible. fastn owns the auth, token refresh, rate limits, pagination and breaking-change fixes, so a Maxio update is not your on-call problem.
- One integration serves your product and your agents. The same governed Maxio connection powers in-product features and gives AI agents scoped, audited access, so you keep commerce and payment records in step with your product without wiring it twice.
Used by these teams
Compare with
Chargebee
InvoicedWorks well with
ChartMogulOften used alongside
Tools the same teams tend to run next to Maxio, across other categories.
NetSuite
Notion
Box
DocusignMaxio integration FAQ
How do I add a Maxio integration to my product?
Enable the Maxio connector in your fastn dashboard, then let each customer authenticate their own Maxio account. fastn handles the OAuth flow, token storage and refresh per tenant, so there is no Maxio client code in your app and no per-customer branch in your codebase. Setup is 4 steps.
Do my customers each connect their own Maxio account?
Yes. Every connection is scoped to the individual customer, so each authorises their own Maxio account and only ever sees their own orders, payments and customers. That per-tenant isolation is the point of an embedded integration: you support the long tail of customer setups without maintaining an integration per customer.
Can AI agents use this Maxio integration?
Yes. The same connection is exposed to your agents through the fastn MCP gateway, with permissions scoped per tenant and every call audited. An agent explains a customer's next invoice from their own subscription and usage records.
Who maintains the Maxio integration?
fastn does. When Maxio changes an endpoint, deprecates a field or alters its auth, the fix lands in the connector rather than in your backlog, and your customers' connections keep working.
Is the Maxio integration safe for payment and order writes?
Writes are idempotent, so a retry cannot double-charge or duplicate an order, and every call is logged per tenant so a transaction can be reconciled against the event that triggered it.
Can my product react to a new order, payment or refund immediately?
Yes, through event triggers, so fulfilment, entitlement or accounting steps run as soon as the event lands rather than on a nightly sync.
What can I build with the Maxio integration?
A common starting point: connect their own Maxio site so subscriptions, invoices and usage components are read and written inside your product. Teams also use it for the other use cases listed above, and expose it to agents for governed reads and writes.
How much does the Maxio integration cost?
It is included. Pricing is based on connected accounts, not on how many connectors you enable, so adding Maxio does not change your per-connector cost. You can start free with 3 connected accounts.
Add Maxio to your product
Start free with 3 connected accounts. No sales call required, and no per-customer integration code.