I tried to upload knowledge base to vapi, I have 5 txt file. I can upload 3 of them and 2 of them blocked by cloudflare.

I would take the files that failed and the cloudflare docs and ask your agent of choice what the likely issue is as my guess it's cloudflare blocking basd on their rules versus something on our end https://developers.cloudflare.com/waf/detections/malicious-uploads/ https://developers.cloudflare.com/waf/detections/malicious-uploads/example-rules/ https://developers.cloudflare.com/waf/detections/malicious-uploads/example-rules/ you could also just run some tests like uploading a subset of one of the failed docs to rule out size or some unusual encoding that's getting picked up