diff --git a/src/controllers/serviceController.ts b/src/controllers/serviceController.ts
index 64c580b..1c97646 100644
--- a/src/controllers/serviceController.ts
+++ b/src/controllers/serviceController.ts
@@ -29,7 +29,8 @@ export default class ServiceController {
     return await 'information of service';
   }
 
-  async calculateCost(serviceName: string, requestData: string): Promise<number> {
+  // FIXME(yoojin): Temporary deprecated. Need new pricing rules.
+  private async calculateCost(serviceName: string, requestData: string): Promise<number> {
     const billingConfig = await this.ain.getValue(Path.app(serviceName).billingConfig());
     const token = requestData.split(' ').length;
     let cost = token * billingConfig.costPerToken;
@@ -71,7 +72,7 @@ export default class ServiceController {
     return await this.ain.getValue(creditHistoryPath) as creditHistories;
   }
 
-  async request(serviceName: string, requestData: string) : Promise<string> {
+  async request(serviceName: string, requestData: any) : Promise<any> {
     this.isRunning(serviceName);
     const result = await new Promise(async (resolve, reject) => {
       const requestKey = Date.now();
diff --git a/src/service.ts b/src/service.ts
index 6caae0b..1c86ecf 100644
--- a/src/service.ts
+++ b/src/service.ts
@@ -30,7 +30,9 @@ export default class Service {
    * @returns {number} Estimated cost.
    */
   async calculateCost (requestData: string) {
-    return await this.serviceController.calculateCost(this.serviceName, requestData);
+    // FIXME(yoojin): Temporary deprecated. Need new pricing rules.
+    // return await this.serviceController.calculateCost(this.serviceName, requestData);
+    return 0;
   }
 
   /**
@@ -76,7 +78,7 @@ export default class Service {
    * @param {string} requestData String data for request to service. 
    * @returns {string} Response data from service.
    */
-  async request(requestData: string) {
+  async request(requestData: any) {
     this.isLoggedIn();
     return await this.serviceController.request(this.serviceName, requestData);
   }