HTTP Module - Unable to Save Custom "Accept" Header (Bug Report)

Questions
1

:bullseye: What is your goal?

Integrate Allegro REST API to automatically fetch customer ratings and save them to Google Sheets every 15 minutes

:thinking: What is the problem & what have you tried?

I cannot save a custom Accept header in the HTTP module. Tried adding header multiple times, clicking Save, but it resets or disappears. Authorization header saves fine. The Allegro API requires Accept: application/vnd.allegro.public.v1+json but returns 406 error without it. Scenario ID: 8304569

4

In your HTTP module, go to Headers and use the + to add these:

Header name: Accept
Header value: application/vnd.allegro.public.v1+json

If it’s still dropping after save, you can try this workaround:

Switch to Headers (mapped mode). Click the toggle and manually map it.

Run a test execution after each approach. The 406 should flip to a proper response once the header actually lands on Allegro’s end.

Let me know if the 406 persists and maybe this could be the auth or the endpoint path instead.​​​​​​​​​​​​​​​​