The Respond.io API allows sending messages containing text, image, audio, video, or file from several different messaging channels to contacts. The API is composed of several types of requests: send a text, send an attachment, and send a text with quick replies. Respond.io is a business messaging platform that connects contacts from any channel to every team. Channels include WhatsApp, LINE, Facebook Messenger, Telgram, WeChat, Twitter, and SMS.
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