Can Marketing Cloud generate JWT tokens in AMPScript?

Question

As the title suggests, I need to make a callout to an external service but must sign the request with a JWT token (using a private key).

Is this possible?

Does this answer your question? How to Generate Access Token Using Ampscript — Abhishek Mudireddy
– Abhishek Mudireddy, Commented Sep 14, 2020 at 13:47
No, this is to authenticate with MC API, whereas what I am asking is whether its possible to generate a JWT token in Marketing Cloud (for external apps) — Deployment Failure
– Deployment Failure, Commented Sep 14, 2020 at 13:48
@AdamSpriggs Am I right to assume SHA256 doesn't support private keys? I don't see any parameters to support this. — Deployment Failure
– Deployment Failure, Commented Sep 14, 2020 at 13:54
I don' think it does. You can upload keys for use with the EncryptSymmetric and DecryptSymmetric functions, but I'm not sure if that'll work for to generate a JWT key. — Adam Spriggs
– Adam Spriggs, Commented Sep 14, 2020 at 13:56

Logan B. · Accepted Answer · 2022-03-03 14:59:57Z

This is newly supported with the GetJWT function.

string GetJWT(string key, string algorithm, string jsonPayload)

Example:

SET @JWT = GetJWT("0123456789abcdef0123456789abcdef", "HS256", @JSON) SET @HREF = CONCAT("https://someurl?sign=",@JWT)

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