Send RCS Messages

RCS is rich, branded messaging delivered in the recipient's native messaging app. Kudosity sends RCS over the V2 API.

Beta. The RCS endpoints are marked beta in the Kudosity API and may change. Check https://developers.kudosity.com before relying on a field not listed here.

The one thing that trips people up

RCS does not send from a phone number. Unlike SMS, MMS and WhatsApp, the sender field is a registered RCS agent ID — alphanumeric or numeric, e.g. DemoSender. If you pass a phone number, the send fails validation.

An agent must be registered and launched on the destination carrier before it will deliver. Registration is not part of this API — talk to your Kudosity account contact to get an agent provisioned, then use its ID here.

Authentication

• Header: x-api-key: {KUDOSITY_API_KEY}
• Base URL: https://api.transmitmessage.com

Send an RCS message