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API endpoints for custom objects, conversations and Customer Agent
GA since 15 Jul 2026
New API endpoints support custom objects, multi-channel conversations and programmatic Customer Agent control.
- Platform
- Klaviyo
- Capability
- APIs & extensibility · Platform
- Vendor's name
- API release 2026-07-15
- First recorded
- Record last updated
Record dates describe acquisition and updates, not human review. About corrections.
Lifecycle history 1 state
- GA15 Jul 2026First recorded 28 Sep 2026 · recorded from the source history · vendor changelog · klaviyo.com ↗ · archived copy, 26 Oct 2026 ↗
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APIs & extensibility on other platforms latest first
- HubSpotNode.js runtime sunset for workflow custom code actionsDeprecation announced3 Nov 2026
- IterableExperiments API endpointsGA20 Oct 2026
- HubSpotNode.js 20 deprecation in developer CLIDeprecation announced19 Oct 2026
- Adobe AJOJWT client-assertion authentication for custom actionsPreview13 Oct 2026
- MoEngageScoped Basic Auth API keysGAOct 2026
- MoEngageOAuth 2.0 authentication for API keysGAOct 2026
- MoEngageAWS STS authentication for API keysGAOct 2026
- HubSpotGranular OAuth scopesGAOct 2026
- HubSpotVerified email in Customer Agent API requestsGAOct 2026
- MarketoStatic list size limit for Get Lead Activities/Changes APIsRetired30 Sep 2026
All APIs & extensibility changes →
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- In-App Forms APIPreview27 Oct 2026
- Public API for Customer AgentPreview26 Jun 2026
- API revision for geofencing, templates and conversationsGA17 Apr 2026
- API revision for geofencing and custom objectsGA21 Jan 2026