diff --git a/package-lock.json b/package-lock.json
index a4389bf1610718..b2d55439574449 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -17102,6 +17102,7 @@
 				"@wordpress/html-entities": "file:packages/html-entities",
 				"@wordpress/i18n": "file:packages/i18n",
 				"@wordpress/icons": "file:packages/icons",
+				"@wordpress/interface": "file:packages/interface",
 				"@wordpress/is-shallow-equal": "file:packages/is-shallow-equal",
 				"@wordpress/keyboard-shortcuts": "file:packages/keyboard-shortcuts",
 				"@wordpress/keycodes": "file:packages/keycodes",
diff --git a/packages/block-editor/package.json b/packages/block-editor/package.json
index 261a33cc9e96c7..dc1fcfdb322e6d 100644
--- a/packages/block-editor/package.json
+++ b/packages/block-editor/package.json
@@ -48,6 +48,7 @@
 		"@wordpress/html-entities": "file:../html-entities",
 		"@wordpress/i18n": "file:../i18n",
 		"@wordpress/icons": "file:../icons",
+		"@wordpress/interface": "file:../interface",
 		"@wordpress/is-shallow-equal": "file:../is-shallow-equal",
 		"@wordpress/keyboard-shortcuts": "file:../keyboard-shortcuts",
 		"@wordpress/keycodes": "file:../keycodes",
diff --git a/packages/block-editor/src/index.js b/packages/block-editor/src/index.js
index 594c78859b25c8..41ba6dab5bb871 100644
--- a/packages/block-editor/src/index.js
+++ b/packages/block-editor/src/index.js
@@ -1,3 +1,8 @@
+/**
+ * WordPress dependencies
+ */
+import { createExperiments } from '@wordpress/interface';
+
 /**
  * Internal dependencies
  */
@@ -17,3 +22,12 @@ export * from './elements';
 export * from './utils';
 export { storeConfig, store } from './store';
 export { SETTINGS_DEFAULTS } from './store/defaults';
+
+const __experiments = createExperiments( {
+	test( name ) {
+		// eslint-disable-next-line no-console
+		console.log( `Executed with "${ name }".` );
+	},
+} );
+
+export { __experiments };
diff --git a/packages/edit-post/src/index.js b/packages/edit-post/src/index.js
index 68e3d4ba76bbd8..4acc4bb1e80b0d 100644
--- a/packages/edit-post/src/index.js
+++ b/packages/edit-post/src/index.js
@@ -6,6 +6,8 @@ import {
 	registerCoreBlocks,
 	__experimentalRegisterExperimentalCoreBlocks,
 } from '@wordpress/block-library';
+import { __experiments } from '@wordpress/block-editor';
+import { secretKey } from '@wordpress/interface';
 import { render, unmountComponentAtNode } from '@wordpress/element';
 import { dispatch, select } from '@wordpress/data';
 import { addFilter } from '@wordpress/hooks';
@@ -80,6 +82,10 @@ export function initializeEditor(
 	settings,
 	initialEdits
 ) {
+	const test = __experiments( 'test', secretKey );
+
+	test( 'hello world' );
+
 	// Prevent adding template part in the post editor.
 	// Only add the filter when the post editor is initialized, not imported.
 	addFilter(
diff --git a/packages/interface/src/index.js b/packages/interface/src/index.js
index 72531a0824c178..06b1f14471cd1e 100644
--- a/packages/interface/src/index.js
+++ b/packages/interface/src/index.js
@@ -1,2 +1,13 @@
 export * from './components';
 export { store } from './store';
+
+export const secretKey = process.env.WP_SECRET_KEY;
+
+export function createExperiments( experiments ) {
+	return function ( name, key ) {
+		if ( secretKey !== key ) {
+			throw new Error( 'Experiments are not supported.' );
+		}
+		return experiments[ name ];
+	};
+}
diff --git a/tools/webpack/shared.js b/tools/webpack/shared.js
index 304da4ad03cc56..1be5c2bc66fbce 100644
--- a/tools/webpack/shared.js
+++ b/tools/webpack/shared.js
@@ -69,6 +69,7 @@ const plugins = [
 		// Inject the `IS_GUTENBERG_PLUGIN` global, used for feature flagging.
 		'process.env.IS_GUTENBERG_PLUGIN':
 			process.env.npm_package_config_IS_GUTENBERG_PLUGIN,
+		'process.env.WP_SECRET_KEY': JSON.stringify( new Date() ),
 	} ),
 	mode === 'production' && new ReadableJsAssetsWebpackPlugin(),
 ];