URLs a directory publishes as the provider's own document, which did not answer on 2026-09-10. The cached copy still answers in every case, so the failure is silent.
550 records across 118 subjects, observed 2026-09-10. Every one carries a check you can run in a single request.
All subjects ยท the whole registry, machine-readable
This is not a list of good APIs or bad ones. It is a list of observations, each dated and each disprovable in one request. Absence from it means an operation was not examined, not that it is fine.