TempVPN API

Fixed sessions cost $0.01 per minute. Duration is expressed in seconds and must be a positive multiple of 60: $0.01 × (duration_seconds / 60). The runtime MPP 402 Challenge is authoritative for payment details. After payment, the new session is paused with null client_public_key and assigned_ip.

Separate node-bound metered product. The registry is the public payment and control origin; the selected node executes the stream and WireGuard peer. A JSON-body POST returns an MPP Session v2 Challenge when unpaid and an SSE control stream after valid funding. Parse the response as Server-Sent Events (`event:` followed by JSON `data:`), never as a one-shot JSON response. The first `message` event has type `vpn-session` and supplies WireGuard configuration; its following `message` event has type `paid-interval` for the first 60-second unit consumed at open. Further `paid-interval` messages arrive every 60 seconds while live. `payment-need-voucher` pauses access until a higher cumulative voucher or top-up is accepted. `payment-receipt` is the final event for normal expiry or close. All atomic payment amounts are decimal strings. The stream ends after its final receipt or a client disconnect. An authenticated empty POST with the same request fields in its query sends a Session v2 voucher, top-up, resume, or close operation; this is the canonical MPPX Session manager transport. Streaming credentials are not portable fixed-session balances.