Sendblue API

Overview

Sendblue is a REST API that sends iMessage (blue bubbles), SMS, and RCS from a provisioned phone number. Everything is plain JSON over HTTPS — no SDK is required. The API covers outbound 1:1 and group sends, iMessage effects, reactions, typing indicators, status callbacks, and inbound webhooks.

When to Use This Skill

• Use when writing application code (server, worker, function) that sends Sendblue messages as part of a long-running service.
• Use when receiving inbound messages via webhooks.
• Use when you need features the CLI does not expose: send styles, reactions, group messages, typing indicators, status callbacks, media uploads, or the contacts API beyond basic CRUD.
• Reach for [[sendblue-cli]] instead for shell-context outbound: one-shot scripts, cron jobs, agent hooks, "ping me when X" workflows.

How It Works

Step 1: Authenticate