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As of August 27, 2025, the V1 API is permanently deprecated. Please use theMigration Guideto update your integrations to the V2 API.
How to authenticate with personal access tokens
Follow the procedures below to generate a personal access token and authenticate an internal or private application with the Calendly API v2. Do not share your personal access token with public sources or reuse it across applications.
To further secure your personal access tokens, we do not display or store them in your Calendly account. After generation, they’re unretrievable.