Off-Session Payments API

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An off-session payments API for platforms that need saved payment methods, later collection, and background billing tied to real customer context.

Flint keeps saved payment methods, customer defaults, subscriptions, and payment intents inside one public API model.

Off-session billing can reuse active customer-linked payment methods instead of forcing a separate billing-only subsystem.

The same customer and order context stays visible to support, retries, and later lifecycle actions.

Workflow Outline

You need to charge a saved payment method later without showing checkout to the buyer again.

Your product already knows the customer and wants background billing tied to the same customer and order context.

You need later collection for subscriptions, repeat purchases, or outstanding balances without spinning up a second billing stack.

What This Solves

Teams searching off-session payments APIs usually need to charge a saved payment method later without making card-on-file billing feel disconnected from the rest of the product.

Step 1

Subscription billing

Bill an active saved payment method in the background as part of recurring subscription lifecycle without detaching it from the customer model.

Step 2

Repeat purchase collection

Charge a returning customer later using a stored default payment method instead of forcing checkout through the full buyer flow again.

Step 3

Later balance recovery

Collect an outstanding balance from an existing customer after the original workflow, using the same customer-linked payment method.

Step 4

Support-driven billing actions

Let ops or support trigger later collection against a known customer without rebuilding the billing context outside Flint.

Why Flint Fits

Flint keeps saved payment methods, customer defaults, subscriptions, and payment intents inside one public API model.

Off-session billing can reuse active customer-linked payment methods instead of forcing a separate billing-only subsystem.

The same customer and order context stays visible to support, retries, and later lifecycle actions.

Choose Another Path When

Use hosted checkout when the buyer should actively review and complete the payment in the current session.

Use invoice-led collection when a formal bill, reminders, and receivables workflow matter more than background charging.

Use saved-payment-method setup pages when the first problem is capturing reusable payment credentials, not billing them later.

Implementation References

Reference the exact flow surfaces

Payment Methods API

Save, list, and set default payment methods before billing them later.

Customers API

Review the customer model that owns default payment methods and later billing state.

Subscriptions API

See how Flint reuses saved payment methods for recurring off-session charges.

Explore saved methods, retries, and later-billing workflows

These pages connect off-session charging to the rest of Flint's saved-payment and recovery model.

Saved Payment Methods API for Platforms

Start here when the first question is how to store and default reusable customer payment methods.

Payment Retry and Recovery API

Use this when later billing flows also need retry strategy and recovery paths after transient failures.

Subscription API

Go broader when off-session billing is mainly supporting recurring subscription lifecycle.

Next Step

Ship the workflow before polishing the edge cases

Start with the underlying Flint flow, then layer your product-specific UX and recovery paths on top.