Is Klaviyo API down?
No. Klaviyo API is working. Checked 20:55 AEDT, 9 Nov 2026, from Frankfurt, Virginia and Sydney, by our own check of api.
Our own check, every five minutes. Klaviyo's status page is quoted below as theirs.
How we know
Our own check, and their own page, side by side.
The rest of Klaviyo
Each part, with whose word it is.
Is it just my store?
If Klaviyo API is working and your store still cannot sell, the fault is in your setup: your theme, an app or your domain. Bilby walks your store and shows you the screen where it stopped. Free.
Or let Bilby check it every night.
Check my store free

How we check
Every 5 minutes, from Sydney, Virginia and Frankfurt, we load Klaviyo's onsite script and its API host. Not a ping. Not their status page.
Questions
Is Klaviyo API down right now?
Working, by our own check from Frankfurt, Virginia and Sydney. We check api every 5 minutes.
How do you check Klaviyo API?
Every 5 minutes from Sydney, Virginia and Frankfurt, as part of loading Klaviyo's onsite script and its API host: the api step answer for Klaviyo API. We also show Klaviyo's status page's own reading of API, labelled as theirs.
What should I do if Klaviyo API is down?
Check the incident on this page and on Klaviyo's own status page, then test your own store: a fault there can look the same to a shopper. Bilby walks your store for free and shows you the screen where it stops.