IMPORTANT: The legacy Direct Sales API endpoints for Advertisers, Campaigns, Orders, Advertisements, and Geo Endpoints are being replaced with new v2 endpoints after July 14, 2026.
For full documentation on what's changing, migration timelines, and v2 endpoint details, refer to the Megaphone Developer Hub. The Developer Hub is the source of truth for all API documentation and will be kept up to date throughout the migration period, including legacy endpoint reference docs during the transition.