When looking to append filter type on the supported parameter, you would need to use a double underscore as stated in this documentation - List blog posts | CMS Blog API.
For now, it looks like contains will return us with a 400 error and for this I would need to check in with our internal team. That said, in the meantime, icontains should work just fine:
Just an update here, I have checked in with our product team and currently we do not support filtering by contains on the name propety. However, if insenstive contains (icontains) isn't sufficient, please do share with me your use case and I'll be happy to pass it along to our product team.
When looking to append filter type on the supported parameter, you would need to use a double underscore as stated in this documentation - List blog posts | CMS Blog API.
For now, it looks like contains will return us with a 400 error and for this I would need to check in with our internal team. That said, in the meantime, icontains should work just fine: