Multi-channel messaging API

Knyt Messages

Send transactional messages via email, SMS, and WhatsApp from a single API. Per-site tokens, recipient whitelists, and full delivery tracking.

Features

Direct MX delivery with DKIM signing for maximum deliverability. No third-party relay required.

Send SMS to any E.164 number worldwide through AWS Simple Notification Service.

Reach customers on WhatsApp via the Meta Cloud API with template and freeform messages.

Control exactly who each site can message. Wildcard or explicit lists per channel.

Five built-in templates — default, contact, inquiry, raw, and transactional — with auto-detection.

Replace your contact form backend. One API call sends the enquiry to your inbox via email with DKIM signing for deliverability.

Send SMS and email reminders before bookings. Works with Knyt Meet or any scheduling system via the API.

Invoice receipts, payment confirmations, and payslip notifications — sent via email or WhatsApp from your own domain.

Product Preview

messages.knyt.io/docs

Send a Message

// Send email with DKIM signing

curl -X POST messages.knyt.io/send \

-H "Authorization: Bearer sk_live_..." \

-d {

"channel": "email",

"to": "client@company.ie",

"subject": "Your invoice is ready",

"template": "transactional"

}

200 OK — Delivered in 340ms

{ "success": true, "channel": "email", "messageId": "msg_8f2a..." }

Email ●SMS ○WhatsApp ○

No setup fees. No lock-in. Start using Knyt Messages today.