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Question

Start a Flow when someone sends a file

  • May 13, 2026
  • 1 comment
  • 7 views

Hi everyone,

I’m trying to figure out whether there is a way to use a keyword trigger or at least a workaround to start an automation whenever a user sends a file through WhatsApp. 

More specifically, I’d like to trigger a flow when someone uploads a document such as a PDF.

I’ve tried using conditions such as "message starts with https" and "message contains pdf", based on the way files appear in the Inbox as links (for example: https:// manybot-files.manychat dot io/example.pdf), but that approach didn’t work for me. 

Any suggestions would be greatly appreciated.

1 reply

  • Author
  • Up-and-comer
  • May 13, 2026

Just to clarify, I’m already aware of the Data Collection block with Reply Type set to File, which works well when the flow asks the user to upload a document, what I’m trying to achieve is triggering a flow when a user sends a file on their own, without being prompted by us first.