Help Scout's Mailbox API

The full Help Scout Mailbox API documentation can be found here: Please check out our developer documentation for complete information, but the Mailbox API covers: 

Our developer documentation also includes information on: 

On June 6th, 2019, we discontinued support for legacy Mailbox API 1.0. If you have any custom or 3rd party apps using these legacy API keys, they must use Mailbox API 2.0 moving forward. To assist you with this transition, we made a guide all about migrating applications. 

If you have any questions about using the API, please email us at

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