# Contentstack Delivery API > The Contentstack Delivery API is the content distribution layer of the Contentstack Headless CMS. It allows developers to retrieve published content for display on websites, mobile apps, and other digital platforms using REST or GraphQL. Designed for high performance and global scale, it serves content cached at the edge via a CDN. - URL: https://optimly.ai/brand/contentstack-delivery-api - Slug: contentstack-delivery-api - BAI Score: 62/100 - Archetype: Challenger - Category: Software - Last Analyzed: April 11, 2026 ## Competitors - Contentful Content Delivery API (https://optimly.ai/brand/contentful-content-delivery-api) ## Also Referenced By - Contentful Delivery Api (https://optimly.ai/brand/contentful-delivery-api)