Installment Transaction Service

Offer flexible payment options to consumers at checkout.

Start a Project](https://developer.visa.com/portal/#users/new)
API Overview](https://developer.visa.com/capabilities/installment-transaction-service)
API Reference](https://developer.visa.com/capabilities/installment-transaction-service/reference)

• Getting Started
• Authentication Method
• Release Notes
• Error Codes
• API Reference
• Product Terms

Installment Transaction Service Authentication Method

X-pay Token

Some Visa Developer APIs require an API Key-Shared Secret Authentication, which Visa refers to as x-pay-token. To invoke an API using x-pay-token, you will need an API Key and a Shared Secret, which is provided via the link below.

Visit the X-pay Token Guide to learn more.