api.staging.example.com or staging.api.example.com?

What.where.owner.com

Api.Staging.example.com

@C0D4 that's exactly how I set it up, but most other developers seem to get confused and attempt to use the other option 🤔

Descending specificity.
api.staging.domain.tld

restful best practise
https://restfulapi.net/resource-nam...

also RFC Standard
https://tools.ietf.org/html/rfc3986

@norman70688
Typically I work with APIs that are:

api.prod.xyz.com
api.staging.xyz.com
api.dev.xyz.com

This gives a clear and precise understanding of which environment you are about to hit/send data too.

as for naming conventions, I doubt there's any written law for subdomians being used as routing, even @heyheni's two links don't include anything outside of just api.example.com 🤷‍♂️