How to Get Your The Trade Desk API Key

The Trade Desk API access in 2026 is not publicly accessible and requires an existing commercial relationship with the company, such as being a customer, agency, or approved adtech partner. Unlike other ad platforms that use OAuth 2.0, The Trade Desk uses a credentialed API user model with long-lived tokens, managed through a closed partner infrastructure. API access requires approval from a TTD account team, potentially involving additional fees and contractual terms. The API supports various functions like campaign management and data integration, each with specific credentials and endpoints. Those without a direct relationship can access the API through agency partners or integration partners like Unified, which offer a single API for multiple ad platforms. The Kokai rebrand represents a UI evolution but does not change the underlying API structure or authentication methods.