Braintree
Official docs outline
13 sections- Overview
An overview of the Braintree payment gateway.
- Client SDK setup
Client SDK setup with client tokens.
- Drop-in UI
Drop-in UI for collecting payment details.
- Hosted fields
Hosted Fields for PCI-friendly custom card forms.
- Transactions
Transactions: sale, authorization and submit for settlement.
- Vault
Storing payment methods in the Vault.
- Customers
Customer records.
- Recurring billing
Recurring billing with plans and subscriptions.
- PayPal
PayPal payments through Braintree.
- 3D Secure
3D Secure authentication.
- Webhooks
Webhooks and notifications.
- Testing
Test cards and sandbox values.
- GraphQL API
The Braintree GraphQL API.
Each section links to the official page. Titles and summaries by Extra Credit; the docs belong to their authors.