I'm looking for a full tutorial about how to use the relationship API.
I've never used API before but I need it because I have more than 100 posts to connect together and I did not find any fast way to do it in bulk from the wordpress admin.
I've watch your video about update a post thanks to API, but it looks very different in that case.
I found anything online about about to use MB_Relationships_API::add
Where can I hire a Metabox API expert to teach me ?