diff --git a/changelog.txt b/changelog.txt
index 3a7f9291530..dfd9b3c8971 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,5 +1,8 @@
 *** WooPayments Changelog ***
 
+= 9.2.1 - 2025-04-23 =
+* Update - Update account session creation route definition to use POST rather than GET.
+
 = 9.2.0 - 2025-04-09 =
 * Add - Add back button for tertiary+ level pages in WooPayments settings.
 * Fix - fix: cancel GooglePay/ApplePay dialog on product page if add-to-cart product validation fails
diff --git a/client/embedded-components/hooks.tsx b/client/embedded-components/hooks.tsx
index c9c725fbff5..4e9f0cb9a5a 100644
--- a/client/embedded-components/hooks.tsx
+++ b/client/embedded-components/hooks.tsx
@@ -33,12 +33,14 @@ export const createKycAccountSession = async (
 	isPoEligible: boolean
 ): Promise< AccountSession > => {
 	const urlParams = new URLSearchParams( window.location.search );
+
 	return await apiFetch< AccountSession >( {
-		path: addQueryArgs( `${ NAMESPACE }/onboarding/kyc/session`, {
+		path: `${ NAMESPACE }/onboarding/kyc/session`,
+		method: 'POST',
+		data: {
 			self_assessment: fromDotNotation( data ),
 			capabilities: urlParams.get( 'capabilities' ) || '',
 			progressive: isPoEligible,
-		} ),
-		method: 'GET',
+		},
 	} );
 };
diff --git a/includes/admin/class-wc-rest-payments-onboarding-controller.php b/includes/admin/class-wc-rest-payments-onboarding-controller.php
index 9d5fd2138da..6a1849903b7 100644
--- a/includes/admin/class-wc-rest-payments-onboarding-controller.php
+++ b/includes/admin/class-wc-rest-payments-onboarding-controller.php
@@ -52,8 +52,8 @@ public function register_routes() {
 			$this->namespace,
 			'/' . $this->rest_base . '/kyc/session',
 			[
-				'methods'             => WP_REST_Server::READABLE,
-				'callback'            => [ $this, 'get_embedded_kyc_session' ],
+				'methods'             => WP_REST_Server::CREATABLE,
+				'callback'            => [ $this, 'create_embedded_kyc_session' ],
 				'permission_callback' => [ $this, 'check_permission' ],
 				'args'                => [
 					'progressive'     => [
@@ -71,32 +71,26 @@ public function register_routes() {
 							'country'           => [
 								'type'        => 'string',
 								'description' => 'The country code where the company is legally registered.',
-								'required'    => true,
 							],
 							'business_type'     => [
 								'type'        => 'string',
 								'description' => 'The company incorporation type.',
-								'required'    => true,
 							],
 							'mcc'               => [
 								'type'        => 'string',
 								'description' => 'The merchant category code. This can either be a true MCC or an MCCs tree item id from the onboarding form.',
-								'required'    => true,
 							],
 							'annual_revenue'    => [
 								'type'        => 'string',
 								'description' => 'The estimated annual revenue bucket id.',
-								'required'    => true,
 							],
 							'go_live_timeframe' => [
 								'type'        => 'string',
 								'description' => 'The timeframe bucket for the estimated first live transaction.',
-								'required'    => true,
 							],
 							'site'              => [
 								'type'        => 'string',
 								'description' => 'The URL of the site.',
-								'required'    => true,
 							],
 						],
 					],
@@ -226,9 +220,9 @@ public function register_routes() {
 	 *
 	 * @param WP_REST_Request $request Request object.
 	 *
-	 * @return WP_Error|WP_REST_Response
+	 * @return WP_Error|WP_REST_Response Response object containing the account session, or an error if session creation failed.
 	 */
-	public function get_embedded_kyc_session( WP_REST_Request $request ) {
+	public function create_embedded_kyc_session( WP_REST_Request $request ) {
 		$self_assessment_data = ! empty( $request->get_param( 'self_assessment' ) ) ? wc_clean( wp_unslash( $request->get_param( 'self_assessment' ) ) ) : [];
 		$progressive          = ! empty( $request->get_param( 'progressive' ) ) && filter_var( $request->get_param( 'progressive' ), FILTER_VALIDATE_BOOLEAN );
 
diff --git a/package-lock.json b/package-lock.json
index 773c34dbc6d..d0fa1fbaf31 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "woocommerce-payments",
-  "version": "9.2.0",
+  "version": "9.2.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "woocommerce-payments",
-      "version": "9.2.0",
+      "version": "9.2.1",
       "hasInstallScript": true,
       "license": "GPL-3.0-or-later",
       "dependencies": {
diff --git a/package.json b/package.json
index bd7b7a57b34..37d3ce41afe 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "woocommerce-payments",
-  "version": "9.2.0",
+  "version": "9.2.1",
   "main": "webpack.config.js",
   "author": "Automattic",
   "license": "GPL-3.0-or-later",
diff --git a/readme.txt b/readme.txt
index 4e7577793f3..8ba0e755ac7 100644
--- a/readme.txt
+++ b/readme.txt
@@ -4,7 +4,7 @@ Tags: woocommerce payments, apple pay, credit card, google pay, payment, payment
 Requires at least: 6.0
 Tested up to: 6.7
 Requires PHP: 7.3
-Stable tag: 9.2.0
+Stable tag: 9.2.1
 License: GPLv2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
 
@@ -87,6 +87,10 @@ You can read our Terms of Service and other policies [here](https://woocommerce.
 
 == Changelog ==
 
+= 9.2.1 - 2025-04-23 =
+* Update - Update account session creation route definition to use POST rather than GET.
+
+
 = 9.2.0 - 2025-04-09 =
 * Add - Add back button for tertiary+ level pages in WooPayments settings.
 * Fix - fix: cancel GooglePay/ApplePay dialog on product page if add-to-cart product validation fails
diff --git a/tests/unit/admin/test-class-wc-rest-payments-onboarding-controller.php b/tests/unit/admin/test-class-wc-rest-payments-onboarding-controller.php
index 0e0b125c4ff..5823b494cde 100644
--- a/tests/unit/admin/test-class-wc-rest-payments-onboarding-controller.php
+++ b/tests/unit/admin/test-class-wc-rest-payments-onboarding-controller.php
@@ -141,7 +141,7 @@ public function test_get_progressive_onboarding_not_eligible() {
 		);
 	}
 
-	public function test_get_embedded_kyc_session() {
+	public function test_create_embedded_kyc_session() {
 		$kyc_session = [
 			'clientSecret'   => 'accs_secret__XXX',
 			'expiresAt'      => time() + 120,
@@ -158,15 +158,15 @@ public function test_get_embedded_kyc_session() {
 				$kyc_session
 			);
 
-		$request = new WP_REST_Request( 'GET' );
-		$request->set_query_params(
+		$request = new WP_REST_Request( 'POST' );
+		$request->set_body_params(
 			[
 				'progressive'         => true,
 				'create_live_account' => true,
 			]
 		);
 
-		$response = $this->controller->get_embedded_kyc_session( $request );
+		$response = $this->controller->create_embedded_kyc_session( $request );
 		$this->assertSame( 200, $response->status );
 		$this->assertSame(
 			array_merge(
diff --git a/woocommerce-payments.php b/woocommerce-payments.php
index a65895983cc..d283b533be2 100644
--- a/woocommerce-payments.php
+++ b/woocommerce-payments.php
@@ -11,7 +11,7 @@
  * WC tested up to: 9.7.1
  * Requires at least: 6.0
  * Requires PHP: 7.3
- * Version: 9.2.0
+ * Version: 9.2.1
  * Requires Plugins: woocommerce
  *
  * @package WooCommerce\Payments