406 Error on POST /sale/product-offers with Beta Headers

[NiristaRon]

Hello,

I am attempting to create a product-offer in one request using POST /sale/product-offers with the beta media type:

Accept: application/vnd.allegro.beta.v1+json
Content-Type: application/vnd.allegro.beta.v1+json

on the production environment (https://api.allegro.pl). Despite my request being correctly formed (see the attached logs), I keep receiving a 406 NotAcceptableException error.

Trace ID from my failing request: 918ea42f01ef52ef
My Allegro user ID: mbnirista
My account is already verified, and I can successfully upload images via POST /sale/images, but the beta product-offer creation fails.
Could you please check why my account or app is restricted from using this “product + offer in one request” Beta feature? Any guidance or adjustments to my account so this endpoint can work would be greatly appreciated.

Thank you

[Lukasz-Zurek]

First of all please use application/vnd.allegro.public.v1+json instead of application/vnd.allegro.beta.v1+json as we have already turned off beta versions almost two years ago.