Commerce & Payments · Integration
PayPal
Add PayPal to your product for your customers, and give your AI agents governed access to it.
Embed a PayPal integration so your customers can take payments and reconcile them from inside your product instead of switching to the PayPal dashboard. Orders, captures, refunds, invoices, subscriptions and disputes are the records their finance and support teams work with, and money state must never be double-applied. Writes are idempotent, so a retry after a timeout cannot refund twice or duplicate a capture, and every call is logged per tenant so a transaction can be reconciled against the event that triggered it. Each customer connects their own PayPal account, so funds and permissions stay theirs. fastn handles per-customer authorisation, webhook delivery 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 PayPal account so payments taken through your product settle to them, with no per-customer code on your side.
Create and capture orders from your product, then issue full or partial refunds against the original transaction.
Read transactions, invoices and subscription state so your product can show payment status without a manual lookup.
React to PayPal webhooks for completed payments, refunds and disputes so fulfilment, entitlement or accounting steps run as soon as the event lands.
For your AI agents
Governed, audited access for the agents you build, through the MCP server.
An agent looks up a transaction and its refund history before answering a billing question.
An agent issues an approved refund within governed permissions, with the write idempotent and audited.
An agent reacts to a dispute event and gathers the order detail needed to respond to it.
Example prompt
Find last week's failed and refunded payments and total them by reason.
Set up PayPal in 4 steps
- 01Open the PayPal connector from your fastn dashboard.
- 02Have each customer authorise their own PayPal account with OAuth.
- 03Select the order, refund, invoice and subscription actions your product uses, then enable the webhooks you want to react to.
- 04Call them from your product, or expose them to an agent through the MCP server.
Why teams use the PayPal integration
What you get by embedding it with fastn instead of building it yourself.
- Ship a PayPal integration without building it. Your customers connect their own PayPal 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 PayPal update is not your on-call problem.
- One integration serves your product and your agents. The same governed PayPal 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
Stripe
Adyen
BraintreeOften used alongside
Tools the same teams tend to run next to PayPal, across other categories.
NetSuite
Notion
Box
DocusignPayPal integration FAQ
How do I add a PayPal integration to my product?
Enable the PayPal connector in your fastn dashboard, then let each customer authenticate their own PayPal account. fastn handles the OAuth flow, token storage and refresh per tenant, so there is no PayPal client code in your app and no per-customer branch in your codebase. Setup is 4 steps.
Do my customers each connect their own PayPal account?
Yes. Every connection is scoped to the individual customer, so each authorises their own PayPal 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 PayPal 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 looks up a transaction and its refund history before answering a billing question.
Who maintains the PayPal integration?
fastn does. When PayPal 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 PayPal 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 PayPal integration?
A common starting point: connect their own PayPal account so payments taken through your product settle to them, with no per-customer code on your side. 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 PayPal integration cost?
It is included. Pricing is based on connected accounts, not on how many connectors you enable, so adding PayPal does not change your per-connector cost. You can start free with 3 connected accounts.
Add PayPal to your product
Start free with 3 connected accounts. No sales call required, and no per-customer integration code.