**Last updated**: 2 February 2026 | [**Change log**](/access/products/sessions/changelog/)

# Get started

Apply a delegate token as part of an Agentic Commerce/ChatGPT Instant Checkout flow with our **Sessions API**.

Prerequisite
Make yourself familiar with our [API Principles](/access/products/reference/api-principles) to ensure a resilient integration.

## 1. Set your headers

Use our [API Reference](/access/products/sessions/openapi) to set your headers.

## 2. Session request

Sessions API schema
View the full schema with examples here