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Action requiredKlaviyo · API & integrations · Thu, Oct 15, 2026
Klaviyo API revision 2024-10-15 reached end of support on Oct 15
What changed
Klaviyo supports each API revision for two years. Its changelog lists revision 2024-10-15 as supported until 2026-10-15, and 2024-07-15 ended support on 2026-07-15.
What to do
Ask the vendors behind custom Klaviyo integrations which revision they pin, and get anything on 2024 revisions upgraded.
Source
← Klaviyo API revision 2026-10-15 brings breaking Campaigns API changesGoogle's Universal Cart launches in the US across Search and the Gemini app →
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