Commerce & Payments · Integration
Stripe
Add Stripe to your product for your customers, and give your AI agents governed access to it.
Stripe is where the money actually moves, which is why a Stripe integration belongs with commerce rather than with data plumbing. The objects are payment intents and the charges they produce, refunds, customers, prices and subscriptions, plus the events Stripe emits about all of them. Three habits keep it safe. Every write carries an idempotency key, so a retry after a timeout finishes the original attempt instead of charging somebody twice. Every inbound webhook is checked against its signature before it is trusted, because an unverified endpoint is an open invitation. And test and live keys hold different data and behave differently, so a flow proven in test is not proven. fastn keeps each account's keys per tenant and tracks Stripe's API versions.
In your product
Embedded for your customers. Per-tenant auth, no per-customer code, maintained by fastn.
Let each customer connect their own Stripe account so payments settle to them and your product never holds card data.
Attach an idempotency key to every create call, so a network retry cannot take a second payment.
Verify webhook signatures before acting, then move entitlement or fulfilment along from the verified event.
Read subscription and invoice state to answer what a customer is paying for right now.
For your AI agents
Governed, audited access for the agents you build, through the MCP server.
An agent explains a failed payment from the payment intent's own decline reason.
An agent issues an approved refund with an idempotency key, and the charge it reversed is logged.
An agent reports which subscriptions are past due and what each was last billed.
Example prompt
Why did this payment intent fail, and is the customer's subscription still active after it?
Set up Stripe in 4 steps
- 01Enable the Stripe connector from your fastn dashboard.
- 02Have each customer authorise their own Stripe account, so calls run under their credentials rather than a shared key.
- 03Decide which orders, payments and customers your product needs, map those fields, then enable the actions and triggers you want.
- 04Call it from your product and expose it to your agents through the same governed connection.
Why teams use the Stripe integration
What you get by embedding it with fastn instead of building it yourself.
- Ship a Stripe integration without building it. Your customers connect their own Stripe 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 Stripe update is not your on-call problem.
- One integration serves your product and your agents. The same governed Stripe 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.
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DocusignStripe integration FAQ
How do I add a Stripe integration to my product?
Enable the Stripe connector in your fastn dashboard, then let each customer authenticate their own Stripe account. fastn handles the OAuth flow, token storage and refresh per tenant, so there is no Stripe client code in your app and no per-customer branch in your codebase. Setup is 4 steps.
Do my customers each connect their own Stripe account?
Yes. Every connection is scoped to the individual customer, so each authorises their own Stripe 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 Stripe 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 failed payment from the payment intent's own decline reason.
Who maintains the Stripe integration?
fastn does. When Stripe 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 Stripe 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 Stripe integration?
A common starting point: let each customer connect their own Stripe account so payments settle to them and your product never holds card data. 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 Stripe integration cost?
It is included. Pricing is based on connected accounts, not on how many connectors you enable, so adding Stripe does not change your per-connector cost. You can start free with 3 connected accounts.
Add Stripe to your product
Start free with 3 connected accounts. No sales call required, and no per-customer integration code.