Is a UIID only for people, or can other things have one too?

Not only for people. Beyond individual users, UIID issues verifiable identity credentials to AI agents and automated systems.

Why that matters: If an automated system holds a verifiable identity, its activity stops being anonymous and indistinguishable from a human's. Accountability becomes possible.

How authority works: An agent never receives open-ended access the way a traditional access key often works. It acts under narrowly defined, time-limited permissions tied back to the person or organization that authorized it — stating what it may do and for how long — and those permissions can be revoked at any time.

The bigger picture: Web4 calls this category of automated, agent-driven activity the Synthetic Web. The goal is not to keep agents out, but to make sure they always act under someone's clearly stated authority.

For developers: Start with the API reference at uiid.linkspreed.com/api-docs and the UIID Cookbook.