# Calendly API > Publicly sourced profile assembled by Optimly, in the Optimly AI Brand Index. Last refreshed 2026-10-04. - **Business Profile:** https://optimly.ai/brand/calendly-api - **Dataset:** https://optimly.ai/brand/calendly-api.json - **Markdown:** https://optimly.ai/brand/calendly-api/llms.txt - **Official website:** https://calendly.com - **Slug:** calendly-api - **Categories:** collaboration-productivity, developer-tools, hr-technology, sales-crm ## Overview - **Tagline:** Leverages the world's most popular scheduling UI with a robust developer experience for deep workflow automation. Source: Brand's website (https://calendly.com) · 2026-10-04 - **Description:** Calendly API is a REST-based developer platform that allows for the programmatic integration of Calendly's scheduling functionality into third-party applications. It enables developers to manage user availability, schedule events, and synchronize data across various calendar providers via webhooks and OAuth authentication. Source: Brand's website (https://calendly.com) · 2026-10-04 ## Offerings - **Core capabilities:** - REST API - Webhooks - Embeddable Widgets - OAuth 2.0 Identity Platform Source: Brand's website (https://calendly.com) · 2026-10-04 - **Pricing:** Subscription (API access available on Standard and higher plans) Source: Brand's website (https://calendly.com) · 2026-10-04 ## Audience - **Target industry:** SaaS Platforms, Recruiting Tech, Sales Enablement, Internal Operations Teams Source: Brand's website (https://calendly.com) · 2026-10-04 ## Landscape - **Competitors:** - Nylas - Cronofy - Cal.com API - HubSpot Schedulers API Source: Brand's website (https://calendly.com) · 2026-10-04 Page last updated 2026-10-17.