link part and iMessage shows it as a preview card. Over RCS and SMS, how the link looks depends on the recipient’s phone.
Send a link
Constraints
https://only, up to 2,048 characters.- The link goes alone. A
linkpart must be the only part in its message. Send any text as a separate message. - Not before the contact replies. Until the person replies to your number, links are rejected, in a
linkpart or inside text. See Sending Rules. - Follow-ups only.
POST /v1/chatsnever accepts alinkpart (FIRST_MESSAGE_LINK_NOT_ALLOWED). Send it into the chat.
Related
Sending Messages
Every part type and how to send it.
Sending Rules
What you can send before the contact replies.