Sign in
Auth

Start WebAuthn assertion for MFA

Begins a WebAuthn assertion ceremony for CLI login/step-up. Returns challenge and session data.

post/auth/mfa/webauthn/assertion/start

Request

  • Base URL: /api/v1 (relative, and the document was published on a file host, not at the API’s origin)
  • URL: /api/v1/auth/mfa/webauthn/assertion/start
  • Auth: API key in header Cookie

Response

OK

optionsunknown required
session_datastring required

SessionData is an opaque, single-use challenge ID to send back with the assertion. The challenge itself is stored server-side and expires after a few minutes.

Changes

No recorded changes to this operation across all 50 revisions of this API.