Every request carries an OAuth Bearer token
(OAuth Integration Guide) and your
usage-plan
x-api-key header.
Start with the Integration Guide — it walks
the canonical send → consent → poll → resend loop end to end, including the
error model and polling cadence. The generated reference below it documents
every field, sourced directly from the API’s own contract definitions.
Upcoming
- Delivery status —
GETon a sent message’s status bymessageId. - Structured failure reason codes — an additive
failureDetails[]alongside today’s human-readablefailures[]strings. - Media (MMS) — fast-follow after the SMS launch.