As an example, you can view our OAuth flow in action on Zapier. Try to connect your cal.com account here. To enable OAuth in one of your apps, you will need a Client ID, Client Secret, Authorization URL, Access Token Request URL, and Refresh Token Request URL.

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OAuth Client Credentials

Only the cal.com team can create new OAuth clients. Please contact us at support@cal.com with the following details: client name, redirect URI (provided by the app), app logo, and a link to the app. The Cal.com team will register the app and provide you with the Client ID and Client Secret. Keep these credentials confidential and secure.

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Authorization URL

To initiate the OAuth flow, direct users to the following authorization URL:
  • https://app.cal.com/auth/oauth2/authorize
  • URL Parameters:
    • client_id
    • state: A securely generated random string to mitigate CSRF attacks
    • redirect_uri: This is where users will be redirected after authorization
After users click Allow, they will be redirected to the redirect_uri with the code (authorization code) and state as URL parameters.

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Access Token Request

Endpoint: POST https://app.cal.com/api/auth/oauth/token Request Body:
  • code: The authorization code received in the redirect URI
  • client_id
  • client_secret
  • grant_type: “authorization_code”
  • redirect_uri
Response: 
{
    access_token: “exampleAccessToken”
    refresh_token: “exampleRefreshToken”
}

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Refresh Token Request

Endpoint: POST https://app.cal.com/api/auth/oauth/refreshToken Request Body:
  • grant_type: “refresh_token”
  • client_id
  • client_secret
Response: 
{
    access_token: “exampleAccessToken”
}

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Testing OAuth Credentials

To verify the correct setup and functionality of OAuth credentials you can use the following endpoint: GET https://api.cal.com/v2/me Headers:
  • Authorization: Bearer exampleAccessToken