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REST API access_token query parameter

Deprecation announced since 30 Jan 2026

The access_token query parameter for authenticating Marketo REST API calls was deprecated August 31, 2026; integrations must use the Authorization header instead.

Read vendor source (opens in a new tab)
experienceleague.adobe.com Evidence for Deprecation announced · 30 Jan 2026
Platform
Adobe Marketo Engage
Component
Marketo Engage
Capability
APIs & extensibility · Platform
Vendor's name
REST API 'access_token' Parameter Deprecation
First recorded
Record last updated

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Lifecycle history 1 state

  1. Deprecation announced30 Jan 2026 Ends 31 Aug 2026 · End date passed · removal not confirmed in the record
    First recorded 2 Oct 2026 · recorded from the source history · vendor release notes · experienceleague.adobe.com ↗ · archived copy, 25 Oct 2026 ↗

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