Reactivate a flagged authenticator

POST /v1/users/{user_id}/authenticators/{authenticator_id}:reactivate · permission user-credentials:write

Returns an authenticator in status clone_suspected (passkey signature-counter anomaly) to active by an administrator's decision; the counter is aligned to the latest value and an audit record is written. If the authenticator is not clone_suspected the call fails with 409. The request takes no body.

Request

Parameter	In	Required	Description
`user_id`	path	yes	User id, prefixed `usr_`.
`authenticator_id`	path	yes	Authenticator id, prefixed `cred_`.

The request takes no body.

Response

200 OK. The body is the updated authenticator.

When the key lacks the users:read_pii permission, label is reduced to initials (A. L.).

{
  "id": "cred_0a1b2c3d4e5f6g7h8j9k0m1n2p",
  "type": "webauthn",
  "role": "both",
  "label": "Laptop",
  "status": "active",
  "synced": true,
  "created_at": "2026-01-15T09:30:00Z",
  "last_used_at": "2026-02-01T08:00:00Z",
  "revoked_at": null,
  "revoked_by": null,
  "revoke_reason": null
}

type: webauthn, totp, sms, email, push · role: first_factor, second_factor, both · status: pending, active, revoked, clone_suspected

Errors

Every error is an application/problem+json body with a stable code.

HTTP	`code`	When
409	`conflict`	The authenticator is not in status `clone_suspected`.
404	`not_found`	The user or the authenticator does not exist in this environment, the authenticator does not belong to this user, or an id is malformed.
401	`unauthenticated`	The API key is missing, invalid or revoked.
403	`insufficient_permissions`	The key lacks the `user-credentials:write` permission.
429	`rate_limited`	The rate limit was exceeded; honor `Retry-After`.
503	`service_unavailable`	A dependency is temporarily unavailable; retry later.

Example

curl -X POST https://api.eu.keenauth.com/v1/users/usr_0a1b2c3d4e5f6g7h8j9k0m1n2p/authenticators/cred_0a1b2c3d4e5f6g7h8j9k0m1n2p:reactivate \
  -H "Authorization: Bearer $KEENAUTH_SECRET_KEY" \
  -H "Idempotency-Key: $(uuidgen)"

Personal data

This endpoint carries personal data: credentials. Personal data in the KeenAuth APIs describes what is stored, how long it is kept and how it is deleted. Do not send special categories of personal data (health, biometric data, religion, political opinions, sexual orientation) in any field.