diff --git a/packages/ramps-controller/CHANGELOG.md b/packages/ramps-controller/CHANGELOG.md
index d0a6f52f534..42fb89a0796 100644
--- a/packages/ramps-controller/CHANGELOG.md
+++ b/packages/ramps-controller/CHANGELOG.md
@@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - **BREAKING:** `RampsControllerMessenger` now requires the `KycController:getSessionStatusForVendor`, `KycController:refreshSessionStatus`, `KycController:hasCompletedVendorDisclaimers`, and `KycController:hasCompletedSessionDisclaimers` actions to hydrate VBA onboarding ([#10278](https://github.com/MetaMask/core/pull/10278))
   - The action types are declared structurally in the ramps package, so no dependency on `@metamask/kyc-controller` is added.
+- Stop sending `crypto` on `RampsService.getPaymentMethods`. Payment methods are provider + region; the param was ignored by `/v2/regions/:region/payments` and split the CDN cache per token. `assetId` remains on the method for caller cache keys. ([#10307](https://github.com/MetaMask/core/pull/10307))
 
 ## [23.0.0]
 
diff --git a/packages/ramps-controller/src/RampsService-method-action-types.ts b/packages/ramps-controller/src/RampsService-method-action-types.ts
index c9b00ec92d4..39b2e80f1f4 100644
--- a/packages/ramps-controller/src/RampsService-method-action-types.ts
+++ b/packages/ramps-controller/src/RampsService-method-action-types.ts
@@ -98,7 +98,9 @@ export type RampsServiceGetProvidersAction = {
  *
  * @param options - Query parameters for filtering payment methods.
  * @param options.region - User's region code (e.g., "us-al").
- * @param options.assetId - CAIP-19 cryptocurrency identifier.
+ * @param options.assetId - CAIP-19 cryptocurrency identifier. Kept on the
+ * caller contract for local cache/staleness; not sent — `/payments` is scoped
+ * to provider + region (the API ignores `crypto`).
  * @param options.provider - Provider ID path.
  * @returns The payment methods response containing payments array.
  */
diff --git a/packages/ramps-controller/src/RampsService.test.ts b/packages/ramps-controller/src/RampsService.test.ts
index c1a72337806..a9ef0280564 100644
--- a/packages/ramps-controller/src/RampsService.test.ts
+++ b/packages/ramps-controller/src/RampsService.test.ts
@@ -1760,7 +1760,6 @@ describe('RampsService', () => {
         .get('/v2/regions/us-al/payments')
         .query({
           region: 'us-al',
-          crypto: 'eip155:1/slip44:60',
           provider: '/providers/stripe',
           sdk: '2.1.6',
           controller: CONTROLLER_VERSION,
@@ -1788,12 +1787,30 @@ describe('RampsService', () => {
       ]);
     });
 
+    it('does not send crypto on the payments URL', async () => {
+      const scope = nock('https://on-ramp-cache.uat-api.cx.metamask.io')
+        .get('/v2/regions/us-al/payments')
+        .query((query) => query.crypto === undefined)
+        .reply(200, mockPaymentMethodsResponse);
+      const { service } = getService();
+
+      const paymentMethodsPromise = service.getPaymentMethods({
+        region: 'us-al',
+        assetId: 'eip155:1/slip44:60',
+        provider: '/providers/stripe',
+      });
+      await jest.runAllTimersAsync();
+      await flushPromises();
+      await paymentMethodsPromise;
+
+      expect(scope.isDone()).toBe(true);
+    });
+
     it('normalizes region case', async () => {
       nock('https://on-ramp-cache.uat-api.cx.metamask.io')
         .get('/v2/regions/us-al/payments')
         .query({
           region: 'us-al',
-          crypto: 'eip155:1/slip44:60',
           provider: '/providers/stripe',
           sdk: '2.1.6',
           controller: CONTROLLER_VERSION,
@@ -1819,7 +1836,6 @@ describe('RampsService', () => {
         .get('/v2/regions/us-al/payments')
         .query({
           region: 'us-al',
-          crypto: 'eip155:1/slip44:60',
           provider: '/providers/stripe',
           sdk: '2.1.6',
           controller: CONTROLLER_VERSION,
@@ -1846,7 +1862,6 @@ describe('RampsService', () => {
         .get('/v2/regions/us-al/payments')
         .query({
           region: 'us-al',
-          crypto: 'eip155:1/slip44:60',
           provider: '/providers/stripe',
           sdk: '2.1.6',
           controller: CONTROLLER_VERSION,
@@ -1873,7 +1888,6 @@ describe('RampsService', () => {
         .get('/v2/regions/us-al/payments')
         .query({
           region: 'us-al',
-          crypto: 'eip155:1/slip44:60',
           provider: '/providers/stripe',
           sdk: '2.1.6',
           controller: CONTROLLER_VERSION,
@@ -1900,7 +1914,6 @@ describe('RampsService', () => {
         .get('/v2/regions/us-al/payments')
         .query({
           region: 'us-al',
-          crypto: 'eip155:1/slip44:60',
           provider: '/providers/stripe',
           sdk: '2.1.6',
           controller: CONTROLLER_VERSION,
@@ -1922,7 +1935,7 @@ describe('RampsService', () => {
       await flushPromises();
 
       await expect(paymentMethodsPromise).rejects.toThrow(
-        `Fetching 'https://on-ramp-cache.uat-api.cx.metamask.io/v2/regions/us-al/payments?sdk=2.1.6&controller=${CONTROLLER_VERSION}&context=mobile-ios&region=us-al&crypto=eip155%3A1%2Fslip44%3A60&provider=%2Fproviders%2Fstripe' failed with status '500'`,
+        `Fetching 'https://on-ramp-cache.uat-api.cx.metamask.io/v2/regions/us-al/payments?sdk=2.1.6&controller=${CONTROLLER_VERSION}&context=mobile-ios&region=us-al&provider=%2Fproviders%2Fstripe' failed with status '500'`,
       );
     });
 
@@ -1931,7 +1944,6 @@ describe('RampsService', () => {
         .get('/v2/regions/us-al/payments')
         .query({
           region: 'us-al',
-          crypto: 'eip155:1/slip44:60',
           provider: '/providers/stripe',
           sdk: '2.1.6',
           controller: CONTROLLER_VERSION,
@@ -1959,7 +1971,6 @@ describe('RampsService', () => {
         .get('/v2/regions/us-al/payments')
         .query({
           region: 'us-al',
-          crypto: 'eip155:1/slip44:60',
           provider: '/providers/stripe',
           sdk: '2.1.6',
           controller: CONTROLLER_VERSION,
diff --git a/packages/ramps-controller/src/RampsService.ts b/packages/ramps-controller/src/RampsService.ts
index ab2ade4a4e1..705d447ed2e 100644
--- a/packages/ramps-controller/src/RampsService.ts
+++ b/packages/ramps-controller/src/RampsService.ts
@@ -1331,7 +1331,9 @@ export class RampsService {
    *
    * @param options - Query parameters for filtering payment methods.
    * @param options.region - User's region code (e.g., "us-al").
-   * @param options.assetId - CAIP-19 cryptocurrency identifier.
+   * @param options.assetId - CAIP-19 cryptocurrency identifier. Kept on the
+   * caller contract for local cache/staleness; not sent — `/payments` is scoped
+   * to provider + region (the API ignores `crypto`).
    * @param options.provider - Provider ID path.
    * @returns The payment methods response containing payments array.
    */
@@ -1348,7 +1350,6 @@ export class RampsService {
     this.#addCommonParams(url);
 
     url.searchParams.set('region', options.region.toLowerCase().trim());
-    url.searchParams.set('crypto', options.assetId);
     url.searchParams.set('provider', options.provider);
 
     const response = await this.#policy.execute(async () => {