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Verify and store a new passkey (session only).

POST
/v1/auth/passkeys/register/finish
curl --request POST \
  --url https://api.opdns.io/v1/auth/passkeys/register/finish \
  --header 'Content-Type: application/json' \
  --cookie opdns_session=<opdns_session> \
  --data '{ "ceremony_id": "2489E9AD-2EE2-8E00-8EC9-32D5F69181C0", "name": "example", "credential": {} }'

credential is the PublicKeyCredential from navigator.credentials.create() serialised as WebAuthn JSON (PublicKeyCredential.toJSON()). 400 ceremony_invalid for an unknown, used or expired ceremony, passkey_invalid when verification fails. The account’s first second factor also returns ten recovery codes, shown once; restricted sessions are lifted.

Authorizations

Section titled “Authorizations”

Request Bodyrequired

Section titled “Request Bodyrequired”
Media typeapplication/json
object
ceremony_id
required
string format: uuid
name

Label; default “Passkey ”.

string
<= 100 characters
credential
required
object
key
additional properties
any
Examplegenerated
{
  "ceremony_id": "2489E9AD-2EE2-8E00-8EC9-32D5F69181C0",
  "name": "example",
  "credential": {}
}

Responses

Section titled “Responses”

201

Section titled “201”

Registered.

Media typeapplication/json
object
passkey
required
object
id
required
string format: uuid
name
required
string
discoverable
required

The authenticator reported a discoverable (resident) credential.

boolean
clone_warning
required

The sign counter went backwards at some sign-in (possible clone; synced passkeys never set it).

boolean
created_at
required
string format: date-time
last_used_at
required
string | null format: date-time
recovery_codes
required

Ten single-use codes (xxxx-xxxx-xxxx-xxxx), shown only in this response; null when the account already had codes.

Array<string> | null
Examplegenerated
{
  "passkey": {
    "id": "2489E9AD-2EE2-8E00-8EC9-32D5F69181C0",
    "name": "example",
    "discoverable": true,
    "clone_warning": true,
    "created_at": "2026-04-15T12:00:00Z",
    "last_used_at": "2026-04-15T12:00:00Z"
  },
  "recovery_codes": [
    "example"
  ]
}

400

Section titled “400”

Malformed request.

Media typeapplication/problem+json
object
type
required
string format: uri
title
required
string
status
required
integer
code
required

Stable machine code.

string
Allowed values: bad_request body_too_large bad_if_match unauthenticated invalid_credentials signup_closed invite_required waitlist_unavailable invalid_token token_expired token_used session_required insufficient_scope csrf_rejected not_found version_mismatch ip_conflict unknown_list too_many_rules validation_failed rate_limited internal node_revoked node_offline node_busy node_timeout node_error result_too_large shape_unsupported node_token_superseded relay_unavailable not_implemented query_timeout query_too_expensive range_too_large too_many_queries second_factor_required invalid_second_factor mfa_enrolment_required mfa_required reauth_required no_second_factor totp_already_enabled totp_not_enabled last_credential passkey_exists passkey_invalid passkeys_unavailable ceremony_invalid account_pending_deletion credential_required deletion_pending no_deletion_pending deletion_started organisation_has_members export_in_progress export_not_ready block_exists invalid_recovery_code profile_not_empty invalid_cursor bad_idempotency_key idempotency_key_reused idempotency_in_progress too_many_streams too_many_reports password_too_short password_too_long profile_suspended
detail
string
errors
Array<object>
object
field
required
string
message
required
string
request_id
string
retry_after

Seconds, repeating the Retry-After header (rate limits, offline nodes).

integer
Example
{
  "type": "https://opdns.io/problems/bad_request",
  "title": "Bad Request",
  "status": 400,
  "code": "bad_request",
  "detail": "invalid JSON body",
  "request_id": "5f2c9a0e7b1d4c38"
}

401

Section titled “401”

Not authenticated.

Media typeapplication/problem+json
object
type
required
string format: uri
title
required
string
status
required
integer
code
required

Stable machine code.

string
Allowed values: bad_request body_too_large bad_if_match unauthenticated invalid_credentials signup_closed invite_required waitlist_unavailable invalid_token token_expired token_used session_required insufficient_scope csrf_rejected not_found version_mismatch ip_conflict unknown_list too_many_rules validation_failed rate_limited internal node_revoked node_offline node_busy node_timeout node_error result_too_large shape_unsupported node_token_superseded relay_unavailable not_implemented query_timeout query_too_expensive range_too_large too_many_queries second_factor_required invalid_second_factor mfa_enrolment_required mfa_required reauth_required no_second_factor totp_already_enabled totp_not_enabled last_credential passkey_exists passkey_invalid passkeys_unavailable ceremony_invalid account_pending_deletion credential_required deletion_pending no_deletion_pending deletion_started organisation_has_members export_in_progress export_not_ready block_exists invalid_recovery_code profile_not_empty invalid_cursor bad_idempotency_key idempotency_key_reused idempotency_in_progress too_many_streams too_many_reports password_too_short password_too_long profile_suspended
detail
string
errors
Array<object>
object
field
required
string
message
required
string
request_id
string
retry_after

Seconds, repeating the Retry-After header (rate limits, offline nodes).

integer
Example
{
  "type": "https://opdns.io/problems/unauthenticated",
  "title": "Unauthorized",
  "status": 401,
  "code": "unauthenticated",
  "detail": "authentication required",
  "request_id": "5f2c9a0e7b1d4c38"
}

403

Section titled “403”

Authenticated but not allowed: insufficient_scope, session_required, csrf_rejected, mfa_enrolment_required (restricted session), mfa_required (an operator action, or an admin-scoped token, from a session signed in with the password alone; not in dev), reauth_required (sign in again within five minutes), account_pending_deletion (the account is in its deletion cooling-off).

Media typeapplication/problem+json
object
type
required
string format: uri
title
required
string
status
required
integer
code
required

Stable machine code.

string
Allowed values: bad_request body_too_large bad_if_match unauthenticated invalid_credentials signup_closed invite_required waitlist_unavailable invalid_token token_expired token_used session_required insufficient_scope csrf_rejected not_found version_mismatch ip_conflict unknown_list too_many_rules validation_failed rate_limited internal node_revoked node_offline node_busy node_timeout node_error result_too_large shape_unsupported node_token_superseded relay_unavailable not_implemented query_timeout query_too_expensive range_too_large too_many_queries second_factor_required invalid_second_factor mfa_enrolment_required mfa_required reauth_required no_second_factor totp_already_enabled totp_not_enabled last_credential passkey_exists passkey_invalid passkeys_unavailable ceremony_invalid account_pending_deletion credential_required deletion_pending no_deletion_pending deletion_started organisation_has_members export_in_progress export_not_ready block_exists invalid_recovery_code profile_not_empty invalid_cursor bad_idempotency_key idempotency_key_reused idempotency_in_progress too_many_streams too_many_reports password_too_short password_too_long profile_suspended
detail
string
errors
Array<object>
object
field
required
string
message
required
string
request_id
string
retry_after

Seconds, repeating the Retry-After header (rate limits, offline nodes).

integer
Example
{
  "type": "https://opdns.io/problems/insufficient_scope",
  "title": "Forbidden",
  "status": 403,
  "code": "insufficient_scope",
  "detail": "the token lacks the profiles:write scope",
  "request_id": "5f2c9a0e7b1d4c38"
}

409

Section titled “409”

Conflict. On POSTs with an Idempotency-Key: idempotency_key_reused (the key was used with a different request) or idempotency_in_progress (the first request with it is still running; retry after Retry-After).

Media typeapplication/problem+json
object
type
required
string format: uri
title
required
string
status
required
integer
code
required

Stable machine code.

string
Allowed values: bad_request body_too_large bad_if_match unauthenticated invalid_credentials signup_closed invite_required waitlist_unavailable invalid_token token_expired token_used session_required insufficient_scope csrf_rejected not_found version_mismatch ip_conflict unknown_list too_many_rules validation_failed rate_limited internal node_revoked node_offline node_busy node_timeout node_error result_too_large shape_unsupported node_token_superseded relay_unavailable not_implemented query_timeout query_too_expensive range_too_large too_many_queries second_factor_required invalid_second_factor mfa_enrolment_required mfa_required reauth_required no_second_factor totp_already_enabled totp_not_enabled last_credential passkey_exists passkey_invalid passkeys_unavailable ceremony_invalid account_pending_deletion credential_required deletion_pending no_deletion_pending deletion_started organisation_has_members export_in_progress export_not_ready block_exists invalid_recovery_code profile_not_empty invalid_cursor bad_idempotency_key idempotency_key_reused idempotency_in_progress too_many_streams too_many_reports password_too_short password_too_long profile_suspended
detail
string
errors
Array<object>
object
field
required
string
message
required
string
request_id
string
retry_after

Seconds, repeating the Retry-After header (rate limits, offline nodes).

integer
Example
{
  "type": "https://opdns.io/problems/idempotency_key_reused",
  "title": "Conflict",
  "status": 409,
  "code": "idempotency_key_reused",
  "detail": "the Idempotency-Key was used with a different request",
  "request_id": "5f2c9a0e7b1d4c38"
}

Headers

Section titled “Headers”
Retry-After
integer

422

Section titled “422”

Field validation failed (validation_failed, unknown_list).

Media typeapplication/problem+json
object
type
required
string format: uri
title
required
string
status
required
integer
code
required

Stable machine code.

string
Allowed values: bad_request body_too_large bad_if_match unauthenticated invalid_credentials signup_closed invite_required waitlist_unavailable invalid_token token_expired token_used session_required insufficient_scope csrf_rejected not_found version_mismatch ip_conflict unknown_list too_many_rules validation_failed rate_limited internal node_revoked node_offline node_busy node_timeout node_error result_too_large shape_unsupported node_token_superseded relay_unavailable not_implemented query_timeout query_too_expensive range_too_large too_many_queries second_factor_required invalid_second_factor mfa_enrolment_required mfa_required reauth_required no_second_factor totp_already_enabled totp_not_enabled last_credential passkey_exists passkey_invalid passkeys_unavailable ceremony_invalid account_pending_deletion credential_required deletion_pending no_deletion_pending deletion_started organisation_has_members export_in_progress export_not_ready block_exists invalid_recovery_code profile_not_empty invalid_cursor bad_idempotency_key idempotency_key_reused idempotency_in_progress too_many_streams too_many_reports password_too_short password_too_long profile_suspended
detail
string
errors
Array<object>
object
field
required
string
message
required
string
request_id
string
retry_after

Seconds, repeating the Retry-After header (rate limits, offline nodes).

integer
Example
{
  "type": "https://opdns.io/problems/validation_failed",
  "title": "Unprocessable Content",
  "status": 422,
  "code": "validation_failed",
  "detail": "the request has invalid fields",
  "errors": [
    {
      "field": "settings.block_mode",
      "message": "one of nxdomain, refused, null, block-page"
    }
  ],
  "request_id": "5f2c9a0e7b1d4c38"
}

503

Section titled “503”

Passkeys are not configured on this server (passkeys_unavailable).

Media typeapplication/problem+json
object
type
required
string format: uri
title
required
string
status
required
integer
code
required

Stable machine code.

string
Allowed values: bad_request body_too_large bad_if_match unauthenticated invalid_credentials signup_closed invite_required waitlist_unavailable invalid_token token_expired token_used session_required insufficient_scope csrf_rejected not_found version_mismatch ip_conflict unknown_list too_many_rules validation_failed rate_limited internal node_revoked node_offline node_busy node_timeout node_error result_too_large shape_unsupported node_token_superseded relay_unavailable not_implemented query_timeout query_too_expensive range_too_large too_many_queries second_factor_required invalid_second_factor mfa_enrolment_required mfa_required reauth_required no_second_factor totp_already_enabled totp_not_enabled last_credential passkey_exists passkey_invalid passkeys_unavailable ceremony_invalid account_pending_deletion credential_required deletion_pending no_deletion_pending deletion_started organisation_has_members export_in_progress export_not_ready block_exists invalid_recovery_code profile_not_empty invalid_cursor bad_idempotency_key idempotency_key_reused idempotency_in_progress too_many_streams too_many_reports password_too_short password_too_long profile_suspended
detail
string
errors
Array<object>
object
field
required
string
message
required
string
request_id
string
retry_after

Seconds, repeating the Retry-After header (rate limits, offline nodes).

integer
Example
{
  "type": "https://opdns.io/problems/passkeys_unavailable",
  "title": "Service Unavailable",
  "status": 503,
  "code": "passkeys_unavailable",
  "detail": "passkeys are not configured on this server",
  "request_id": "5f2c9a0e7b1d4c38"
}