This merchant's live keys do not work yet

The partner surface's live gate. A live key is refused with 403 unless the merchant is active (or suspended — a suspended merchant can still read its own history). A test key always works, in every status, from the merchant's first minute and before any KYC at all.

What to do

• Keep building against test mode. This is not something the integration can route around, and nothing about the integration changes when it lifts.
• GET /merchants/me reports where onboarding has got to: draft and submitted mean documents are outstanding, in_review means we are looking at them, sandbox means the review passed and we have not yet cleared the account for live, approved means live mode still has to be requested — see merchants.not_ready_for_live for the three conditions — and suspended carries a suspension_reason.
• If you are seeing this in a deployment you expected to be live, check the key prefix before anything else: this is the error a pg_live_ key gets, and finding a live key in a staging deployment is worth knowing about for its own sake.