diff --git a/src/generate.ts b/src/generate.ts
index e5f09cae..13ee7e8f 100644
--- a/src/generate.ts
+++ b/src/generate.ts
@@ -1,15 +1,48 @@
 import {DefaultCodeGenerator} from '@oas3/codegen/ts/generator';
 const fs = require('fs');
 
-export function generate() {
-  const filePath = './oasTestSpecs.json';
-  const dataStr = fs.readFileSync(filePath, 'utf-8').toString();
-  const data = JSON.parse(dataStr);
-  const codeGenerator = new DefaultCodeGenerator(data);
-  codeGenerator.generate({
-    targetFolderPath: './generated-files',
-    predefinedFolderPaths: [['booking', 'core']],
+type OutputPath = string[];
+
+export type GenerateConfig = {
+  type: 'oas3';
+  getSpecification: () => Promise<object>;
+  outputFolderPath: string;
+  importRootAlias?: string;
+  predefinedFolderOutputPaths?: OutputPath[];
+};
+
+export function generate(config: GenerateConfig) {
+  switch (config.type) {
+    case 'oas3':
+      // eslint-disable-next-line no-case-declarations
+      config.getSpecification().then(data => {
+        const codeGenerator = new DefaultCodeGenerator(data);
+        codeGenerator.generate({
+          outputFolderPath: config.outputFolderPath,
+          predefinedFolderOutputPaths: config.predefinedFolderOutputPaths,
+        });
+      });
+      break;
+    default:
+      console.error('');
+  }
+}
+
+// todo: move this code to the outside of the package
+export function usePackage() {
+  generate({
+    type: 'oas3',
+    getSpecification: () => {
+      return new Promise<object>(resolve => {
+        const filePath = './oasTestSpecs.json';
+        const dataStr = fs.readFileSync(filePath, 'utf-8').toString();
+        const data = JSON.parse(dataStr);
+        resolve(data);
+      });
+    },
+    outputFolderPath: './generated-files',
+    predefinedFolderOutputPaths: [['booking', 'core']],
   });
 }
 
-generate();
+usePackage();
diff --git a/src/oas3/codegen/ts/core.ts b/src/oas3/codegen/ts/core.ts
index 79b8d6f3..60f26139 100644
--- a/src/oas3/codegen/ts/core.ts
+++ b/src/oas3/codegen/ts/core.ts
@@ -37,6 +37,13 @@ export function areOutputPathsEqual(a: OutputPath, b: OutputPath): boolean {
   );
 }
 
+export function containsOutputPath(
+  outputPaths: OutputPath[],
+  outputPath: OutputPath
+): boolean {
+  return !!outputPaths.find(p => areOutputPathsEqual(p, outputPath));
+}
+
 export function doesOutputPathStartWithOtherOutputPath(
   outputPath: OutputPath,
   otherOutputPath: OutputPath
diff --git a/src/oas3/codegen/ts/endpoint.ts b/src/oas3/codegen/ts/endpoint.ts
index b2a1b279..0db5bc20 100644
--- a/src/oas3/codegen/ts/endpoint.ts
+++ b/src/oas3/codegen/ts/endpoint.ts
@@ -1,11 +1,7 @@
 import {CodeGenerator, OutputType, OutputPath, DefinitionOutput} from './core';
 import {Request} from '@oas3/specification';
 import {applyResponseByStatusCodeMap} from './response';
-import {
-  templateRequestHandlerType,
-  templateRequestResultType,
-  templateRequestType,
-} from './template';
+import {templateRequestResultType, templateRequestType} from './template';
 
 export const responseOutputPathPart = 'response6b3a7814';
 export const requestResultOutputPathPart = 'requestResult6b3a7814';
@@ -95,7 +91,6 @@ export function applyEndpointCallerFunction(
       endpointIdConstDefinition.path,
       templateRequestType.path,
       requestResultTypeDefinition.path,
-      templateRequestHandlerType.path,
     ],
   };
   codeGenerator.addOutput(funcDefinition);
diff --git a/src/oas3/codegen/ts/generator.ts b/src/oas3/codegen/ts/generator.ts
index 68306773..2581b817 100644
--- a/src/oas3/codegen/ts/generator.ts
+++ b/src/oas3/codegen/ts/generator.ts
@@ -93,9 +93,9 @@ const componentResponsesFileNameOutputPathPart = 'responses6b3a7814';
 const componentSchemasFileNameOutputPathPart = 'schemas6b3a7814';
 
 type GenerateConfig = {
-  targetFolderPath: string;
+  outputFolderPath: string;
   importRootAlias?: string;
-  predefinedFolderPaths?: OutputPath[];
+  predefinedFolderOutputPaths?: OutputPath[];
 };
 
 export class DefaultCodeGenerator implements CodeGenerator {
@@ -124,7 +124,7 @@ export class DefaultCodeGenerator implements CodeGenerator {
   }
 
   private initializeOperationFolderOutputPaths(config: GenerateConfig) {
-    this.operationFolderOutputPaths = config.predefinedFolderPaths ?? [];
+    this.operationFolderOutputPaths = config.predefinedFolderOutputPaths ?? [];
     for (const path in this.oas3Specs.paths) {
       const requestByMethodMap = this.oas3Specs.paths[path];
       for (const method in requestByMethodMap) {
@@ -141,7 +141,7 @@ export class DefaultCodeGenerator implements CodeGenerator {
     fileOutputByFilePath: FileOutputByFilePath,
     config: GenerateConfig
   ) {
-    const cleanTargetFolderPath = cleanUpFolderPath(config.targetFolderPath);
+    const cleanTargetFolderPath = cleanUpFolderPath(config.outputFolderPath);
     fs.cpSync(__dirname + '../../../../templates/ts', cleanTargetFolderPath, {
       recursive: true,
     });
diff --git a/src/oas3/codegen/ts/response.ts b/src/oas3/codegen/ts/response.ts
index a51e608f..144258a3 100644
--- a/src/oas3/codegen/ts/response.ts
+++ b/src/oas3/codegen/ts/response.ts
@@ -9,6 +9,7 @@ import {
   OutputType,
   OutputPath,
   DefinitionOutput,
+  containsOutputPath,
 } from './core';
 import {applyComponentRefSchema, applySchema} from './schema';
 import {
@@ -58,15 +59,29 @@ export function applyResponseByStatusCodeMap(
   path: OutputPath
 ): DefinitionOutput {
   const statusCodeResponseOutputs: CodeGenerationOutput[] = [];
+  const requiredOutputPaths: OutputPath[] = [];
   for (const statusCode in schema) {
     const responseOutputPath: OutputPath = [...path, statusCode];
     const responseOrRef = schema[statusCode];
     if (isResponseComponentRef(responseOrRef)) {
-      const responseBodyOutput = applyComponentRefSchema(
+      const jsonResponseBody = applyComponentRefSchema(
         codeGenerator,
         responseOrRef,
         [...responseOutputPath, 'body']
       );
+      if (!containsOutputPath(requiredOutputPaths, templateResponseType.path)) {
+        requiredOutputPaths.push(templateResponseType.path);
+      }
+      if (
+        !containsOutputPath(requiredOutputPaths, templateStatusCodeEnum.path)
+      ) {
+        requiredOutputPaths.push(templateStatusCodeEnum.path);
+      }
+      if (
+        !containsOutputPath(requiredOutputPaths, templateStatusCodeEnum.path)
+      ) {
+        requiredOutputPaths.push(jsonResponseBody.path);
+      }
       const responseOutput: CodeGenerationOutput = {
         createCode: referencingPath => {
           const responseType = templateResponseType.createName(path);
@@ -74,14 +89,14 @@ export function applyResponseByStatusCodeMap(
           const statusCodeEnumEntry = getTemplateResponseStatusCodeEnumEntry(
             parseInt(statusCode)
           );
-          const bodyCode = responseBodyOutput.createCode(referencingPath);
+          const bodyCode = jsonResponseBody.createCode(referencingPath);
           return `${responseType}<${statusCodeEnum}.${statusCodeEnumEntry}, ${bodyCode}>`;
         },
         path: responseOutputPath,
         requiredOutputPaths: [
           templateResponseType.path,
           templateStatusCodeEnum.path,
-          responseBodyOutput.path,
+          jsonResponseBody.path,
         ],
       };
       statusCodeResponseOutputs.push(responseOutput);
@@ -98,6 +113,9 @@ export function applyResponseByStatusCodeMap(
         parseInt(statusCode),
         jsonResponseBody
       );
+    if (!containsOutputPath(requiredOutputPaths, statusCodeResponseType.path)) {
+      requiredOutputPaths.push(statusCodeResponseType.path);
+    }
     statusCodeResponseOutputs.push({
       createCode: referencingPath => {
         return statusCodeResponseType.createName(referencingPath);
@@ -123,7 +141,7 @@ export function applyResponseByStatusCodeMap(
       });
       return `${codeParts.join('\n')}`;
     },
-    requiredOutputPaths: statusCodeResponseOutputs.map(o => o.path),
+    requiredOutputPaths,
   };
   codeGenerator.addOutput(responseTypeDefinition);
   return responseTypeDefinition;