v3
latestOpenAPI 3.0.32026-08-05363479.3 KBBegin an indexed-domain provider claim
The returned TXT value must remain published after verification. NHS persists only its SHA-256 token hash, then automatically rechecks domain control; raw DNS answers are not retained.
post/provider/claims
Request body
Response
Claim, one-time DNS TXT challenge, and ownership-freshness contract