Messaging APIs for every channel.
Send email, SMS, WhatsApp, push notifications, Slack messages, and Telegram messages through one authenticated API. Each channel has its own connection requirements, payload fields, and plan limits.
Email API
Transactional and broadcast email API
Senddio is an email API for developers and AI agents with isolated transactional and broadcast IP pools, flat pricing, no per-email markup, and SPF/DKIM/DMARC verification in-app.
Explore Email →SMS API
Programmable SMS API
Senddio sends SMS through a single REST API shared with email, WhatsApp, push, Slack and Telegram. Powered by managed Telnyx infrastructure.
Explore SMS →WhatsApp API
WhatsApp Business API
Send WhatsApp Business text messages through /v1/send using Meta Cloud API or 360dialog, with verified inbound replies and unified logs.
Explore WhatsApp →Push API
Push notification API
Senddio sends push notifications to individual Firebase Cloud Messaging registration tokens through one REST API shared with email, SMS, WhatsApp, Slack and Telegram.
Explore Push →Slack API
Slack messaging API
Senddio sends Slack text messages via one universal REST API, with OAuth installation, verified inbound event streaming and agent-scoped sends.
Explore Slack →Telegram API
Telegram bot messaging
Senddio sends Telegram bot text messages with chat addressing through one universal REST API, with optional Markdown configured per bot and protected inbound webhooks.
Explore Telegram →