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I am working on an SMS-based service that parses incoming texts and sends a response, building on top of Twilio. I am concerned about a possible ddos which would result in increased costs. Is there a way of preventing this or limiting the number of times a user can send SMS without you being charged? I am based in Australia, so some of the alternatives to Twilio are not available with local numbers.

farai
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You can monitor inbound activity and if you see a massive influx, you can remove the webhook, as detailed here, which will prevent anymore SMS inbound toward your account.

Is there a way to block incoming SMS on my Twilio phone number?

Alan
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  • Thanks Alan. The link does answer my question. It would be good if you could be able to whitelist users phone number. This way you are proactively preventing. – farai Apr 16 '21 at 21:55