CarbonWatch
Some widely used AI services are not in the registry. This is not an oversight: in every case, detecting them would produce a wrong figure, and a wrong figure is worse than a stated absence.
Gemini, NotebookLM, AI Studio and Vertex AI
Google serves its AI from the same addresses as Drive, Gmail, Maps and Cloud Storage. The eight addresses of generativelanguage.googleapis.com are exactly those of translate.googleapis.com and storage.googleapis.com.
Since detection works by address — which is what makes decrypting unnecessary — recognising them would amount to billing a photo backup as inference. These entries did exist in the registry: they were removed after measurement, for want of a signal separating them from the rest without reading traffic.
Azure OpenAI
Its endpoints are specific to each customer — <resource>.openai.azure.com — so there is no fixed name to resolve. This is the textbook case the registry exists for: one entry added by hand, with the region of the deployment, is enough to have it recognised on the machine where it is used.
Transcription and speech synthesis
Otter, Fireflies and their kind send their payload the other way: you upload audio and receive text. But the estimator only bills bytes received, because those are the ones carrying what the model produced. Adding them would show them at zero, which would mislead more than leaving them out.
What these absences cost the total
It should be said plainly: the global total published on this site does not count Gemini usage, one of the most used AI services in the world. It therefore undercounts, and it undercounts by an unknown amount — neither this site nor the application can quantify what is not detected.
The total remains a sum of usage observed on the machines that share it, not an estimate of the worldwide footprint of AI. It never claimed to be, and this page is where that is written down.
What would bring them back
A signal separating inference from the rest without reading anything: a dedicated address prefix, a hostname used for nothing else, a distinct port. The day one of those exists for an absent service, the entry returns to the registry — and since the registry is an editable file, anyone can put it back on their own machine without waiting.