> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.pinnacle.sh/v-2/changelog/2025/12/7/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.pinnacle.sh/_mcp/server.

## 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`](/api-reference/messages/blast-sms) | [`POST /messages/blast/mms`](/api-reference/messages/blast-mms) | [`POST /messages/blast/rcs`](/api-reference/messages/blast-rcs)
* Target an audience by ID
* Optional scheduling with future send times
* List and track blasts with [`POST /messages/blasts/list`](/api-reference/messages/list-blasts)

**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}`](/api-reference/messages/cancel-scheduled-message)
* List upcoming scheduled messages with [`POST /messages/schedules/list`](/api-reference/messages/list-scheduled-messages)

> **Note**
>
> Have questions? Reach out to us - [founders@pinnacle.sh](mailto:founders@pinnacle.sh)

> One API for RCS, iMessage, MMS, and SMS. Build, test, and scale every channel — send your first message in minutes, not weeks.