# Happeo API Authentication

Happeo supports 2 types of authentication to the API:

- **OAuth 2.0 with code challenge (PKCE)**
- **System Accounts**

Choose the best method for you based on your use-case. Generally for any operations where you want the API access to act as the user, use OAuth 2.0. In cases where you want to act as a separate account or create a background thread, use a system account.

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Updated about 1 year ago

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Updated about 1 year ago

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