Keeps registry user accounts in sync with yours, so a user’s first sign-in to CONFIRM is instant rather than provisioned on the spot.
Identity is keyed on your user ID. Matching is by
external_user_ref first, then by email (case-insensitive). That
ordering is what makes an email or name change on your side update the
existing account — this endpoint can never produce a duplicate.
Permissions are not synced. Your system tells us who a user is and which registry they belong to; what they can do inside CONFIRM is governed by CONFIRM roles, managed in the portal. Role changes on your side are deliberately ignored.
Partner API key sent as Authorization: Bearer cfk_.... Keys are partner-level — one key reaches every registry linked to your partner account and nothing else. CONFIRM issues and revokes them; a key is shown exactly once at creation because only its hash is stored, and revocation takes effect on the next request. Develop against the sandbox base URL with a sandbox key, where telephony is restricted to an allowlist you provide.