Artera Messaging API (MAPI)
Artera's outbound SMS API, marketed to health systems and Artera Marketplace vendors as the SendMessage API. It sends real-time text messages to patients from the health system's trusted Artera number, authenticated with OAuth 2.0 plus an API key and restricted by IP allowlist. It optionally returns a Deliverability Webhook carrying the message status (received, sent, delivered, undelivered, failed) and a Patient Response Webhook when a patient replies through the Secure Messaging Portal. MAPI is SMS-only — not voice or email — delivers immediately with no advance scheduling, permits and auto-shortens URLs, and deliberately does NOT apply Artera's TCPA quiet-hours or Holiday Hours adjustments, leaving send-time compliance to the caller. The full specification is published only inside Artera's registration-gated developer portal.