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Link an address, or create an empty DDNS slot.

POST
/v1/profiles/{id}/linked-ips
curl --request POST \
  --url https://api.opdns.io/v1/profiles/example/linked-ips \
  --header 'Content-Type: application/json' \
  --cookie opdns_session=<opdns_session> \
  --data '{ "ip": "example" }'

Token scope: profiles:write. Only public unicast IPv4 addresses. Omit ip to create a slot that the DDNS URL fills. An address linked to any other profile is a 409 ip_conflict; addresses are never moved silently. The DDNS token is returned once.

Authorizations

Section titled “Authorizations”

Parameters

Section titled “Parameters”

Path Parameters

Section titled “Path Parameters”
id
required

Public 6-character id; never 000000.

string
/^[a-z0-9]{6}$/

Header Parameters

Section titled “Header Parameters”
Idempotency-Key
string
>= 1 characters <= 255 characters

Makes the POST safe to retry: a repeat with the same key and the same request within 24 h returns the stored response (with Idempotent-Replayed: true) without creating again. 1 to 255 visible ASCII characters (a UUID is fine).

Request Bodyrequired

Section titled “Request Bodyrequired”
Media typeapplication/json
object
ip
string | null format: ipv4
Examplegenerated
{
  "ip": "example"
}

Responses

Section titled “Responses”

201

Section titled “201”

Linked.

Media typeapplication/json
object
linked_ip
required
object
id
required
string format: uuid
ip
required

Null for a DDNS slot not yet called.

string | null format: ipv4
created_at
required
string format: date-time
updated_at
required
string format: date-time
ddns_token
required
string
ddns_url
required
string format: uri
Examplegenerated
{
  "linked_ip": {
    "id": "2489E9AD-2EE2-8E00-8EC9-32D5F69181C0",
    "ip": "example",
    "created_at": "2026-04-15T12:00:00Z",
    "updated_at": "2026-04-15T12:00:00Z"
  },
  "ddns_token": "example",
  "ddns_url": "https://example.com"
}

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"
}

404

Section titled “404”

Not found (also for resources of another organisation).

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/not_found",
  "title": "Not Found",
  "status": 404,
  "code": "not_found",
  "detail": "resource not found",
  "request_id": "5f2c9a0e7b1d4c38"
}

409

Section titled “409”

Conflict. profile_suspended: the operator suspended the profile; it resolves without filtering and refuses changes until it is reinstated (reads still work). On POSTs with an Idempotency-Key: idempotency_key_reused or idempotency_in_progress (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/profile_suspended",
  "title": "Conflict",
  "status": 409,
  "code": "profile_suspended",
  "detail": "the profile is suspended by the operator",
  "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"
}