Confirm the key works and see what it is bound to, in one call: enrollment_id, key_name, key_prefix and scopes, the product_url this run is about, tier and access_state, trial_ends_at, and onboarding { snapshot_status, current_phase, feed_ready, scanned, message } (feed_ready is false while the Growth Snapshot deep scan is still building). credits is present only when metering is live. The same payload the whoami MCP tool returns, without its text screen. Read-only, zero spend.