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Exposed WebAPI GET request size limit?

I have found information regarding a 5MB limit when my Appian application uses an Integration Object to call another API hosted on an external system.

However, if my Appian application is exposing a WebAPI, so that an external system can make a GET request to my Appian application, is there a size limit on the JSON payload that my Appian WebAPI can return to that external system?

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