Fiat
Current chain head hash (publish externally to anchor) (admin)
Authorization
cookieAuth pid_access<token>
JWT access token set by /auth/google/callback or /auth/refresh
In: cookie
Response Body
application/json
application/json
curl -X GET "https://example.com/fiat/admin/chain/head"{}Begin passkey registration POST
Returns WebAuthn registration options. When the account already has a credential, `isAdditional` is true and an `approval` challenge is included — the client must assert with an existing credential to authorize adding the new one (existing-credential approval rule).
Verify the tamper-evident ledger hash chain (admin) GET
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