Speed test not working for our site

speed test not working as we this error and its there since 3 months now

API Request Failed: GET /api/v4/zones/63b0059bc6cba69d60ef1b2d93b5f826/speed_testing (504)

as you see the above error on the file attached in the bottom highlighted

we check everywhere including ask server support but no help… CF support its been 3 months and 5 request but no answer or solution yet .

Sometimes I encounter this, but only when the new domain / Website is being recently added to my Cloudflare account.

Therefore, I wait up for the proper DNS propagation (24 hours), and later on even with my Firewall Rules setup, Bot Fight Mode and other secutiry options available on a Free plan, I did not encounter it ever later again, works fine.

its been 3 months and this website is there for 8 years

Did anything changed at the origin host / server, or Firewall like UFW if using it, or maybe ModSecurity?

Or, is Cloudflare allowed to connect to your origin host / server?

Cloudflare IP addresses list can be found here:

How about Bot Fight Mode option?

Do you have some custom-made Firewall Rules and blocking some ASN, IP or Country?

I hope you do not have the I am under an attack option enabled?

Nevertheless, do you see some events under the Firewall Events tab at Cloudflare dashboard being shown/logged for your domain name?

May I ask you to share your ticket number here with us?


Please also see suggestions at Community Tip - Fixing "The Speed test could not run" !


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