For AI agents: a documentation index is available at the root level at /llms.txt and /llms-full.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
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December 7, 2025
December 7, 2025
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Blasts & Scheduled Messages

Send messages to entire audiences at once and schedule messages for future delivery.

What’s new?

Bulk messaging (Blasts)

Blast an SMS, MMS, or RCS message to every contact in an audience with a single API call. Combine with scheduling to send blasts at a specific time.

  • POST /messages/blast/sms | POST /messages/blast/mms | POST /messages/blast/rcs
  • Target an audience by ID
  • Optional scheduling with future send times
  • List and track blasts with POST /messages/blasts/list

Scheduled messages

Schedule any message — single or blast — for future delivery and cancel before it sends.

  • Schedule via the scheduledTime field on any send endpoint
  • Cancel with DELETE /messages/schedule/{id}
  • List upcoming scheduled messages with POST /messages/schedules/list
Have questions? Reach out to us - founders@pinnacle.sh