wallet.alert_subscriber_exists
The email address is already subscribed to low-balance alerts for this workspace.
wallet.alert_subscriber_exists is returned by POST /v1/wallet/alert/subscribers when the supplied email is already in the subscriber list. The single-add endpoint is strict to allow the UI to surface precise chip-input validation rather than silently no-oping.
The email address was already added as a low-balance alert subscriber. The POST path is not idempotent.
If idempotent semantics are required, use PUT /v1/wallet/alert/subscribers to replace the complete subscriber list. If adding to an existing list, retrieve the current list first and check for duplicates client-side.
{
"error": {
"code": "wallet.alert_subscriber_exists",
"message": "email already subscribed",
"request_id": "req_01900000abc"
}
}