Updates API Inspector: Inspect Updates API requests, responses, and transients.

The Updates API Inspector is a developer tool for WordPress that reveals the inner workings of the platform's update mechanism. It shows exactly what data is sent and received when checking for updates, helping developers of externally hosted plugins and themes troubleshoot their update implementations.

API Query Inspector – View exactly how core queries the Updates API for plugins, themes, and core updates.
Response Viewer – See the raw data the API returns in response to each query.
Transient Analysis – Inspect the site transients (update_plugins, update_themes) that core uses to offer updates.
Multisite Support – Works in network-activated mode with a dedicated admin menu under Network Admin.

This plugin is especially useful for understanding the undocumented Updates API and ensuring that externally hosted plugins and themes correctly populate the transients required for the auto-updates UI introduced in WordPress 5.5.

Updates API Inspector

View how the WordPress Updates API is queried and what it returns. Inspects site transients used for update notifications to debug external plugins.

Updates API Inspector

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