FAQ:
What is an "obsolete profile"?
Around 2017, Gaijin changed the formats of profiles in a way that prevented looking up data for them unless they were logged into since. Currently there is no way around this.
Is there an API?
Yes, at api.rooik.at. Do note that it is rate-limited easily, it's usage or schema may change and that it is not supported by Gaijin. Native libraries are available, but can only be used closed source.
Is there any pricing, and are donations accepted?
Currently the service and API is free to use. Donations are appreciated but I do not have an official channel for them, so I might not be able to accept them.
Contact me:
You can message me on Discord as llama_for3ver, or
alternatively email llamaz@rooik.at