How to test AI SMS auto-reply flow in n8n without Twilio toll-free or 10DLC verification?

Questions
1

Hi everyone,

I’m experimenting with an AI-powered SMS auto-responder workflow using n8n, OpenAI, and Google Sheets.

The idea is working well in theory — the workflow receives messages and generates a smart reply using GPT — but I’m running into issues with testing:

  • My Twilio toll-free number was rejected during verification.
  • Local numbers now require A2P 10DLC registration, which also blocks replies.
  • I don’t have a registered business or website yet, so I can’t complete the verification process.

I’m just trying to test and iterate on the concept before going any further.

:question: My Questions:

  • Has anyone else run into this issue when testing SMS workflows without verification?
  • Are there SMS providers or alternative channels that allow 2-way SMS testing more easily?
  • How have others solved this while still in the prototyping or solo dev stage?

Any advice or suggestions would be appreciated!

Thanks :pray:
— PawOne

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2

Yes, I have encountered this problem. Here’s a summary.

2 Likes
3

Totally agree — thanks for putting this together. It’s frustrating when even basic reply functionality is blocked unless you go through full business verification. Not ideal at all when you’re just trying to test or build a small prototype.