Free SMS API

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udefn provides a free SMS API. Create bots and start making $ with udefn. Learn more about bots here. Bots are automated programs that respond to users SMS queries. udefn exposes very simple API which you can leverage to build bots.

Getting started is easy.

  • Sign in to your udefn account
  • Enable publisher features by clicking on Account settings
  • Create your bot definition
  • Code your bot
  • Earn points
Standard Messaging Rates Apply. Other charges may apply. Visit your carrier for more information. To unsubscribe, text stop to 51406. Text help to 51406 to learn more about udefn.
 
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