I’m proposing to add the following unsigned integer types: value | description | JSON data type -- | -- | -- `uint16` | unsigned 16-bit integer | number `uint32` | unsigned 32-bit integer | number `uint64` | unsigned 64-bit integer | number, string (same caveats as `int64`) The `uint32` and `uint64` formats are already in use by `gnostic`. This is effectively a repeat of https://github.com/OAI/OpenAPI-Specification/issues/2617, now that there is an extension registry, as it looks like only `uint8` was added when that registry was created.