Does the Hetzner Cloud API need an API key?

Does the Hetzner Cloud API need an API key?

Yes for the 16 operations checked: an anonymous request was refused, on 2026-09-15. Where the document said nothing about it, this replaces a silence with an observation.

ERR-2026-1711, ERR-2026-1730, ERR-2026-1758, ERR-2026-1805, ERR-2026-1912, ERR-2026-1935, ERR-2026-1938, ERR-2026-1959, ERR-2026-1964, ERR-2026-1965, ERR-2026-1978, ERR-2026-2099

Where is the Hetzner Cloud OpenAPI specification?

Not where the directory says. The URL published as this provider's own document did not answer on 2026-09-15 (1 entry). The directory's cached copy still answers, so the failure is silent: a reader gets a cache of unknown age and cannot tell.

ERR-2026-0452

Every record behind those answers

17 open records, observed 2026-09-10. Every claim below carries the command that disproves it. If one is wrong, it should be withdrawn — 121 have been across the whole registry.

credentials are required (observed) (16)

The document establishes no authentication requirement for this operation; an anonymous request is refused with 401. The requirement is now observed rather than unknown.

ERR-2026-1711Get all FirewallsHTTP 401checked 2026-09-15, 2 times
ERR-2026-1730Get an Action for a Floating IPHTTP 401checked 2026-09-15, 2 times
ERR-2026-1758Get all ImagesHTTP 401checked 2026-09-15, 2 times
ERR-2026-1805Get a FirewallHTTP 401checked 2026-09-15, 2 times
ERR-2026-1912Get all CertificatesHTTP 401checked 2026-09-15, 2 times
ERR-2026-1935Get a DatacenterHTTP 401checked 2026-09-15, 2 times
ERR-2026-1938Get all ActionsHTTP 401checked 2026-09-15, 2 times
ERR-2026-1959Get all Actions for an ImageHTTP 401checked 2026-09-15, 2 times
ERR-2026-1964Get all Actions for a Floating IPHTTP 401checked 2026-09-15, 2 times
ERR-2026-1965Get all Actions for a FirewallHTTP 401checked 2026-09-15, 2 times
ERR-2026-1978Get an Action for an ImageHTTP 401checked 2026-09-15, 2 times
ERR-2026-2099Get all DatacentersHTTP 401checked 2026-09-15, 2 times
ERR-2026-2112Get an Action for a FirewallHTTP 401checked 2026-09-15, 2 times
ERR-2026-2122Get a Floating IPHTTP 401checked 2026-09-15, 2 times
ERR-2026-2138Get an ImageHTTP 401checked 2026-09-15, 2 times
ERR-2026-2148Get all Floating IPsHTTP 401checked 2026-09-15, 2 times

Check it yourself:

curl -sS -o /dev/null -w '%{http_code}\n' https://api.hetzner.cloud/v1/firewalls

the description document is gone (1)

The document APIs.guru names as this provider's own origin returns HTTP 404.

ERR-2026-0452https://docs.hetzner.cloud/spec.jsonHTTP 404checked 2026-09-15, 2 times

Check it yourself:

curl -sS -o /dev/null -w '%{http_code}\n' https://docs.hetzner.cloud/spec.json

Also filed as: hetzner.cloud. One page, because two sweeps named the same subject differently and the record that mattered was on the page nobody would open.

If a record here is wrong

Run its check. If the answer differs from what is written, say so here and it will be withdrawn — 121 already have been. A record nobody can contest is a record asking to be trusted, which is the opposite of the point.

What this page does not tell you

This is not a clean bill of health for anything not listed. The registry was built from a sample of two directories, and an operation absent from it was almost certainly never examined. Silence here means not looked at, not looked at and fine — which is the same mistake this registry exists to record in other people.

What this is

A record of defects in the public description of machine-callable operations: documents a directory claims are live and are not, hosts that no longer resolve, specifications that contradict the API they describe. It is not a ranking, not a review, and not a judgement about the service. No credential is ever sent to anything listed here.

The whole registry, machine-readable: errata.json. Index of subjects: index.html.

Built from registry errata-2026-09-10@b7cb54d3a847. If manifest.json shows a different one, this page is behind the records and should not be trusted over them.