diff --git a/raystack/frontier/v1beta1/frontier.proto b/raystack/frontier/v1beta1/frontier.proto
index eab89d9b..80f1516f 100644
--- a/raystack/frontier/v1beta1/frontier.proto
+++ b/raystack/frontier/v1beta1/frontier.proto
@@ -1362,6 +1362,482 @@ service FrontierService {
       description: "List a user preferences by ID.";
     };
   }
+
+  // Billing account
+  rpc CreateBillingAccount(CreateBillingAccountRequest) returns (CreateBillingAccountResponse) {
+    option (google.api.http) = {
+      post: "/v1beta1/billing",
+      body: "*"
+    };
+    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
+      tags: "Billing";
+      summary: "Create billing account";
+      description: "Create a new billing account for an organization.";
+    };
+  }
+
+  rpc GetBillingAccount(GetBillingAccountRequest) returns (GetBillingAccountResponse) {
+    option (google.api.http) = {get: "/v1beta1/billing/{id}"};
+    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
+      tags: "Billing";
+      summary: "Get billing account";
+      description: "Get a billing account by ID.";
+    };
+  }
+
+  rpc UpdateBillingAccount(UpdateBillingAccountRequest) returns (UpdateBillingAccountResponse) {
+    option (google.api.http) = {
+      put: "/v1beta1/billing/{id}",
+      body: "*"
+    };
+    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
+      tags: "Billing";
+      summary: "Update billing account";
+      description: "Update a billing account by ID.";
+    };
+  }
+
+  rpc ListBillingAccounts(ListBillingAccountsRequest) returns (ListBillingAccountsResponse) {
+    option (google.api.http) = {get: "/v1beta1/billing"};
+    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
+      tags: "Billing";
+      summary: "List billing accounts";
+      description: "List billing accounts of an organization.";
+    };
+  }
+
+  rpc DeleteBillingAccount(DeleteBillingAccountRequest) returns (DeleteBillingAccountResponse) {
+    option (google.api.http) = {delete: "/v1beta1/billing/{id}"};
+    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
+      tags: "Billing";
+      summary: "Delete billing account";
+      description: "Delete a billing account by ID.";
+    };
+  }
+
+  rpc GetBillingBalance(GetBillingBalanceRequest) returns (GetBillingBalanceResponse) {
+    option (google.api.http) = {get: "/v1beta1/billing/{id}/balance"};
+    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
+      tags: "Billing";
+      summary: "Get billing balance";
+      description: "Get the balance of a billing account by ID.";
+    };
+  }
+
+  // Subscriptions
+  rpc GetSubscription(GetSubscriptionRequest) returns (GetSubscriptionResponse) {
+    option (google.api.http) = {get: "/v1beta1/billing/{billing_id}/subscriptions/{id}"};
+    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
+      tags: "Subscription";
+      summary: "Get subscription";
+      description: "Get a subscription by ID.";
+    };
+  }
+
+  rpc ListSubscriptions(ListSubscriptionsRequest) returns (ListSubscriptionsResponse) {
+    option (google.api.http) = {get: "/v1beta1/billing/{billing_id}/subscriptions"};
+    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
+      tags: "Subscription";
+      summary: "List subscriptions";
+      description: "List subscriptions of a billing account.";
+    };
+  }
+
+  rpc UpdateSubscription(UpdateSubscriptionRequest) returns (UpdateSubscriptionResponse) {
+    option (google.api.http) = {
+      put: "/v1beta1/billing/{billing_id}/subscriptions/{id}",
+      body: "*"
+    };
+    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
+      tags: "Subscription";
+      summary: "Update subscription";
+      description: "Update a subscription by ID.";
+    };
+  }
+
+  // Billing Feature
+  rpc CreateFeature(CreateFeatureRequest) returns (CreateFeatureResponse) {
+    option (google.api.http) = {
+      post: "/v1beta1/billing/features",
+      body: "*"
+    };
+    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
+      tags: "Feature";
+      summary: "Create feature";
+      description: "Create a new feature for platform.";
+    };
+  }
+
+  rpc GetFeature(GetFeatureRequest) returns (GetFeatureResponse) {
+    option (google.api.http) = {get: "/v1beta1/billing/features/{id}"};
+    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
+      tags: "Feature";
+      summary: "Get feature";
+      description: "Get a feature by ID.";
+    };
+  }
+
+  rpc ListFeatures(ListFeaturesRequest) returns (ListFeaturesResponse) {
+    option (google.api.http) = {get: "/v1beta1/billing/features"};
+    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
+      tags: "Feature";
+      summary: "List features";
+      description: "List all features of a platform.";
+    };
+  }
+
+  rpc UpdateFeature(UpdateFeatureRequest) returns (UpdateFeatureResponse) {
+    option (google.api.http) = {
+      put: "/v1beta1/billing/features/{id}",
+      body: "*"
+    };
+    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
+      tags: "Feature";
+      summary: "Update feature";
+      description: "Update a feature by ID.";
+    };
+  }
+
+  // Plans
+  rpc CreatePlan(CreatePlanRequest) returns (CreatePlanResponse) {
+    option (google.api.http) = {
+      post: "/v1beta1/billing/plans",
+      body: "*"
+    };
+    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
+      tags: "Plan";
+      summary: "Create plan";
+      description: "Create a new plan for platform.";
+    };
+  }
+
+  rpc ListPlans(ListPlansRequest) returns (ListPlansResponse) {
+    option (google.api.http) = {get: "/v1beta1/billing/plans"};
+    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
+      tags: "Plan";
+      summary: "List plans";
+      description: "List all plans.";
+    };
+  }
+
+  rpc GetPlan(GetPlanRequest) returns (GetPlanResponse) {
+    option (google.api.http) = {get: "/v1beta1/billing/plans/{id}"};
+    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
+      tags: "Plan";
+      summary: "Get plan";
+      description: "Get a plan by ID.";
+    };
+  }
+
+  rpc UpdatePlan(UpdatePlanRequest) returns (UpdatePlanResponse) {
+    option (google.api.http) = {
+      put: "/v1beta1/billing/plans/{id}",
+      body: "*"
+    };
+    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
+      tags: "Plan";
+      summary: "Update plan";
+      description: "Update a plan by ID.";
+    };
+  }
+
+  // Checkout
+  rpc CreateCheckout(CreateCheckoutRequest) returns (CreateCheckoutResponse) {
+    option (google.api.http) = {
+      post: "/v1beta1/billing/{billing_id}/checkouts",
+      body: "*"
+    };
+    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
+      tags: "Checkout";
+      summary: "Checkout a feature or subscription";
+      description: "Checkout a feature to buy it one time or start a subscription plan on a billing account.";
+    };
+  }
+
+  rpc ListCheckouts(ListCheckoutsRequest) returns (ListCheckoutsResponse) {
+    option (google.api.http) = {get: "/v1beta1/billing/{billing_id}/checkouts"};
+    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
+      tags: "Checkout";
+      summary: "List checkouts";
+      description: "List all checkouts of a billing account.";
+    };
+  }
+
+  // Billing Entitlements
+  rpc CheckFeatureEntitlement(CheckFeatureEntitlementRequest) returns (CheckFeatureEntitlementResponse) {
+    option (google.api.http) = {
+      post: "/v1beta1/billing/{billing_id}/check",
+      body: "*"
+    };
+    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
+      tags: "Entitlement";
+      summary: "Check entitlement";
+      description: "Check if a billing account is entitled to a feature.";
+    };
+  }
+}
+
+// Billing
+
+message BillingAccountRequestBody {
+  string name = 1;
+  string email = 2;
+  string phone = 3;
+  BillingAccount.Address address = 4;
+  string currency = 5;
+
+  google.protobuf.Struct metadata = 10;
+}
+
+message CreateBillingAccountRequest {
+  // ID of the organization to create the billing account for
+  string org_id = 1 [(validate.rules).string.min_len = 1];
+  // Billing account to create.
+  BillingAccountRequestBody body = 2;
+}
+
+message CreateBillingAccountResponse {
+  // Created billing account
+  BillingAccount billing_account = 1;
+}
+
+message GetBillingAccountRequest {
+  // ID of the billing account to get
+  string id = 1 [(validate.rules).string.min_len = 1];
+
+  string org_id = 2 [(validate.rules).string.min_len = 1];
+}
+
+message GetBillingAccountResponse {
+  // Billing account
+  BillingAccount billing_account = 1;
+}
+
+message UpdateBillingAccountRequest {
+  // ID of the billing account to update
+  string id = 1 [(validate.rules).string.min_len = 1];
+
+  string org_id = 2 [(validate.rules).string.min_len = 1];
+
+  // Billing account to update.
+  BillingAccountRequestBody body = 3;
+}
+
+message UpdateBillingAccountResponse {
+  // Updated billing account
+  BillingAccount billing_account = 1;
+}
+
+message ListBillingAccountsRequest {
+  // ID of the organization to list billing accounts for
+  string org_id = 1 [(validate.rules).string.min_len = 1];
+}
+
+message ListBillingAccountsResponse {
+  // List of billing accounts
+  repeated BillingAccount billing_accounts = 1;
+}
+
+message DeleteBillingAccountRequest {
+  // ID of the billing account to delete
+  string id = 1 [(validate.rules).string.min_len = 1];
+
+  string org_id = 2 [(validate.rules).string.min_len = 1];
+}
+
+message DeleteBillingAccountResponse {}
+
+message GetBillingBalanceRequest {
+  // ID of the billing account to get the balance for
+  string id = 1 [(validate.rules).string.min_len = 1];
+
+  string org_id = 2 [(validate.rules).string.min_len = 1];
+}
+
+message GetBillingBalanceResponse {
+  // Balance of the billing account
+  BillingAccount.Balance balance = 1;
+}
+
+message GetSubscriptionRequest {
+  // ID of the billing account to get the subscription for
+  string billing_id = 1 [(validate.rules).string.min_len = 1];
+  // ID of the subscription to get
+  string id = 2 [(validate.rules).string.min_len = 1];
+}
+
+message GetSubscriptionResponse {
+  Subscription subscription = 1;
+}
+
+message ListSubscriptionsRequest {
+  // ID of the billing account to list subscriptions for
+  string billing_id = 1 [(validate.rules).string.min_len = 1];
+}
+
+message ListSubscriptionsResponse {
+  // List of subscriptions
+  repeated Subscription subscriptions = 1;
+}
+
+message UpdateSubscriptionRequest {
+  // ID of the billing account to update the subscription for
+  string billing_id = 1 [(validate.rules).string.min_len = 1];
+  // ID of the subscription to update
+  string id = 2 [(validate.rules).string.min_len = 1];
+  
+  google.protobuf.Struct metadata = 20;
+}
+
+message UpdateSubscriptionResponse {
+  // Updated subscription
+  Subscription subscription = 1;
+}
+
+message ListPlansRequest {}
+
+message ListPlansResponse {
+  // List of plans
+  repeated Plan plans = 1;
+}
+
+message CheckFeatureEntitlementRequest {
+  string billing_id = 1 [(validate.rules).string.min_len = 1];
+  string feature = 2 [(validate.rules).string.min_len = 1];
+}
+
+message CheckFeatureEntitlementResponse {
+  bool status = 1;
+}
+
+message CheckoutSubscriptionBody {
+  string plan = 1;
+  int32 trail_days = 2;
+}
+
+message CheckoutFeatureBody {
+  string feature = 1;
+}
+
+message CreateCheckoutRequest {
+  // ID of the billing account to create the subscription for
+  string billing_id = 1 [(validate.rules).string.min_len = 1];
+  
+  string success_url = 2;
+  string cancel_url = 3;
+  
+  // Subscription to create
+  CheckoutSubscriptionBody subscription_body = 10;
+  // Feature to buy
+  CheckoutFeatureBody feature_body = 11;
+}
+
+message CreateCheckoutResponse {
+  // Checkout session
+  CheckoutSession checkout_session = 1;
+}
+
+message ListCheckoutsRequest {
+  // ID of the billing account to list checkouts for
+  string billing_id = 1 [(validate.rules).string.min_len = 1];
+}
+
+message ListCheckoutsResponse {
+  // List of checkouts
+  repeated CheckoutSession checkout_sessions = 1;
+}
+
+message FeatureRequestBody {
+  string name = 1;
+  string title = 2;
+  string description = 3;
+  string plan_id = 4;
+
+  repeated Price prices = 5;
+
+  google.protobuf.Struct metadata = 20;
+}
+
+message CreateFeatureRequest {
+  // Feature to create
+  FeatureRequestBody body = 1;
+}
+
+message CreateFeatureResponse {
+  // Created feature
+  Feature feature = 1;
+}
+
+message GetFeatureRequest {
+  // ID of the feature to get
+  string id = 1 [(validate.rules).string.min_len = 1];
+}
+
+message GetFeatureResponse {
+  // Feature
+  Feature feature = 1;
+}
+
+message ListFeaturesRequest {}
+
+message ListFeaturesResponse {
+  // List of features
+  repeated Feature features = 1;
+}
+
+message UpdateFeatureRequest {
+  // ID of the feature to update
+  string id = 1 [(validate.rules).string.min_len = 1];
+  // Feature to update
+  FeatureRequestBody body = 2;
+}
+
+message UpdateFeatureResponse {
+  // Updated feature
+  Feature feature = 1;
+}
+
+message PlanRequestBody {
+  string name = 1;
+  string title = 2;
+  string description = 3;
+
+  repeated Feature features = 4;
+  string interval = 5; // known intervals are "day", "week", "month", and "year"
+
+  google.protobuf.Struct metadata = 20;
+}
+
+message CreatePlanRequest {
+  // Plan to create
+  PlanRequestBody body = 1;
+}
+
+message CreatePlanResponse {
+  // Created plan
+  Plan plan = 1;
+}
+
+message GetPlanRequest {
+  // ID of the plan to get
+  string id = 1 [(validate.rules).string.min_len = 1];
+}
+
+message GetPlanResponse {
+  // Plan
+  Plan plan = 1;
+}
+
+message UpdatePlanRequest {
+  // ID of the plan to update
+  string id = 1 [(validate.rules).string.min_len = 1];
+  // Plan to update
+  PlanRequestBody body = 2;
+}
+
+message UpdatePlanResponse {
+  // Updated plan
+  Plan plan = 1;
 }
 
 // Authentication
diff --git a/raystack/frontier/v1beta1/models.proto b/raystack/frontier/v1beta1/models.proto
index 12e8d262..5070b84a 100644
--- a/raystack/frontier/v1beta1/models.proto
+++ b/raystack/frontier/v1beta1/models.proto
@@ -531,6 +531,115 @@ message Preference {
   }];
 }
 
+message BillingAccount {
+  message Address {
+    string line1 = 1;
+    string line2 = 2;
+    string city = 3;
+    string state = 4;
+    string postal_code = 5;
+    string country = 6;
+  }
+
+  message Balance {
+    int64 amount = 1;
+    string currency = 2;
+
+    google.protobuf.Timestamp updated_at = 3;
+  }
+
+  string id = 1;
+  string org_id = 2;
+  
+  string name = 3;
+  string email = 4;
+  string phone = 5;
+  Address address = 6;
+  string provider_id = 7;
+  string provider = 8;
+  string currency = 9;
+  string state = 10;
+
+  google.protobuf.Struct metadata = 20;
+  google.protobuf.Timestamp created_at = 21;
+  google.protobuf.Timestamp updated_at = 22;
+}
+
+message Subscription {
+  string id = 1;
+  string customer_id = 2;
+  string provider_id = 3;
+  string plan_id = 4;
+
+  string state = 5;
+  int32 trial_days = 9;
+
+  google.protobuf.Struct metadata = 10;
+  google.protobuf.Timestamp created_at = 11;
+  google.protobuf.Timestamp updated_at = 12;
+  google.protobuf.Timestamp canceled_at = 13;
+}
+
+message CheckoutSession {
+  string id = 1;
+
+  string checkout_url = 2;
+  string success_url = 3;
+  string cancel_url = 4;
+  string state = 5;
+
+  google.protobuf.Struct metadata = 10;
+  google.protobuf.Timestamp created_at = 11;
+  google.protobuf.Timestamp updated_at = 12;
+  google.protobuf.Timestamp expire_at = 13;
+}
+
+message Plan {
+  string id = 1;
+  string name = 2;
+  string title = 3;
+  string description = 4;
+  repeated Feature features = 5;
+  string interval = 6; // known intervals are "day", "week", "month", and "year"
+
+  google.protobuf.Struct metadata = 20;
+  google.protobuf.Timestamp created_at = 21;
+  google.protobuf.Timestamp updated_at = 22;
+}
+
+message Feature {
+  string id = 1;
+  string name = 2;
+  string title = 3;
+  string description = 4;
+  repeated string plan_ids = 5;
+  string state = 6;
+
+  repeated Price prices = 7;
+
+  google.protobuf.Struct metadata = 20;
+  google.protobuf.Timestamp created_at = 21;
+  google.protobuf.Timestamp updated_at = 22;
+}
+
+message Price {
+  string id = 1;
+  string feature_id = 2;
+  string provider_id = 3;
+  string name = 4;
+  string usage_type = 7; // known types are "licensed" and "metered"
+  string billing_scheme = 8; // known schemes are "tiered" and "flat"
+  string state = 9;
+  string currency = 10; // like "usd", "eur", "gbp"
+  int64 amount = 11;
+  string metered_aggregate = 13; // known aggregations are "sum", "last_during_period" and "max"
+  string tier_mode = 14; // known modes are "graduated" and "volume"
+
+  google.protobuf.Struct metadata = 20;
+  google.protobuf.Timestamp created_at = 21;
+  google.protobuf.Timestamp updated_at = 22;
+}
+
 // Model crud body
 
 message RoleRequestBody {