T7
Programmable APIs
Voice, video, messaging, and verify. 3 lessons. Each lesson cites the pages that were opened, and marks the rest confirm.
Voice and video names that opened
T7-R19
Twilio's docs home lists Programmable Voice, Programmable Messaging, Verify, Video, Elastic SIP Trunking, and Conversations among its produc
Messaging and verify
T7-R20
Vonage's Messages API page says it integrates with SMS, MMS, RCS, WhatsApp, Messenger, Viber, and email.
One Plivo number that really was on the page
T7-R21
Plivo's docs home says the guides cover Voice, Messaging, SIP Trunking, and Voice AI.
Sources and go deeper
Opened 2026-10. A row marked confirm has no link, because that page was not verified.
- RFC. RFC 3261, SIP last checked 2026-10
- Wikipedia. Session Initiation Protocol last checked 2026-10
- Wikipedia. Platform as a service, Communications platform as a service section last checked 2026-10
- Confirm. Release-specific menus for this track. confirm. Not opened as a single checklist. last checked 2026-10