<provider>, served at /<provider>/ by pikopod up. sandbox add is the same command without --update.
Output
x-pikopod-emit-only mark is flagged, because it would never fire.
When --spec points at a documentation page, the first line names how the spec was found:
DRAFT and says so. See Importing from a docs URL.
--update
Exit codes
0 on success, 2 on any refusal: no spec, an unreachable URL, a document that does not parse, a name that already exists, an invalid webhook URL.