diff --git a/examples/generate-vercel-client/api-client/client.ts b/examples/generate-vercel-client/api-client/client.ts
new file mode 100644
index 00000000..c0c5e5aa
--- /dev/null
+++ b/examples/generate-vercel-client/api-client/client.ts
@@ -0,0 +1,224 @@
+import fetch, { FetchError } from 'node-fetch'
+import * as https from 'node:https'
+import * as k8s from '@kubernetes/client-node'
+
+function removeNullableProperties<T extends Record<string, unknown>>(
+  obj: T
+): T {
+  Object.keys(obj).forEach(
+    (key) => (obj[key] === undefined || obj[key] === null) && delete obj[key]
+  )
+  return obj
+}
+
+/**
+ * Exponential backoff based on the attempt number.
+ *
+ * @remarks
+ * 1. 600ms * random(0.4, 1.4)
+ * 2. 1200ms * random(0.4, 1.4)
+ * 3. 2400ms * random(0.4, 1.4)
+ * 4. 4800ms * random(0.4, 1.4)
+ * 5. 9600ms * random(0.4, 1.4)
+ *
+ * @param attempt - Current attempt
+ * @param maxRetries - Maximum number of retries
+ */
+async function defaultBackoff(attempt: number, maxRetries: number) {
+  const attempts = Math.min(attempt, maxRetries)
+
+  const timeout = ~~((Math.random() + 0.4) * (300 << attempts))
+  await new Promise((resolve) =>
+    setTimeout((res: any) => resolve(res), timeout)
+  )
+}
+
+const isPlainObject = (value: any) => value?.constructor === Object
+
+type QueryArgsSpec = {
+  path: string
+  method?: 'GET' | 'DELETE' | 'PATCH' | 'POST' | 'PUT' | 'OPTIONS' | 'HEAD'
+  body?: any
+  contentType?: string
+  params?: any
+  headers?: Record<string, string | number | undefined> | undefined
+}
+
+type MaybePromise<T> = T | Promise<T>
+
+type InterceptorArgs = {
+  args: QueryArgsSpec
+  opts: https.RequestOptions
+}
+type Interceptor = (
+  args: InterceptorArgs,
+  options: Options
+) => MaybePromise<https.RequestOptions>
+
+const interceptors: Interceptor[] = []
+
+type RetryConditionFunction = (extraArgs: {
+  res?: Response
+  error: unknown
+  args: QueryArgsSpec
+  attempt: number
+  options: RetryOptions
+}) => boolean | Promise<boolean>
+
+type RetryOptions = {
+  retryCondition?: RetryConditionFunction | undefined
+  maxRetries?: number | undefined
+}
+
+type HttpHeaderOptions = {
+  headers?: Record<string, string | number | undefined> | undefined
+}
+
+export type Options = RetryOptions & HttpHeaderOptions
+
+export async function apiClient<Response>(
+  args: QueryArgsSpec,
+  extraOptions?: Options
+): Promise<Response> {
+  const maxRetries = extraOptions?.maxRetries ?? 3
+
+  const defaultRetryCondition: RetryConditionFunction = ({ ...obj }) => {
+    const { res, attempt, error } = obj
+    if (attempt > maxRetries) {
+      return false
+    }
+
+    if (error instanceof FetchError) {
+      return true
+    }
+    if (res && res.status >= 500) {
+      return true
+    }
+    return false
+  }
+
+  const options = {
+    maxRetries,
+    backoff: defaultBackoff,
+    retryCondition: defaultRetryCondition,
+    ...extraOptions,
+  }
+
+  let { path, method, params, body, contentType } = { ...args }
+
+  let httpsOptions: https.RequestOptions = {
+    path,
+    headers: removeNullableProperties({
+      ...args.headers,
+      ...options.headers,
+    }),
+  }
+  if (method) {
+    httpsOptions.method = method
+  }
+
+  for (const interceptor of interceptors) {
+    httpsOptions = await interceptor(
+      {
+        args,
+        opts: httpsOptions,
+      },
+      options
+    )
+  }
+
+  if (
+    !httpsOptions.agent &&
+    (httpsOptions.ca || httpsOptions.cert || httpsOptions.key)
+  ) {
+    const agent = new https.Agent(
+      removeNullableProperties({
+        ca: httpsOptions.ca,
+        cert: httpsOptions.cert,
+        key: httpsOptions.key,
+        port: httpsOptions.port ? Number(httpsOptions.port) : undefined,
+      })
+    )
+    httpsOptions.agent = agent
+  }
+
+  if (!httpsOptions.protocol) {
+    httpsOptions.protocol = 'http:'
+  }
+  const host = httpsOptions.host || httpsOptions.hostname
+  let baseUrl = `${httpsOptions.protocol}//${host}`
+  const searchParams = toSearchParams(params)
+  if (searchParams.size) {
+    baseUrl += (baseUrl.includes('?') ? '&' : '?') + toSearchParams(params)
+  }
+  const url = new URL(baseUrl)
+  if (httpsOptions.port) {
+    url.port = httpsOptions.port.toString()
+  }
+  if (httpsOptions.path) {
+    url.pathname = httpsOptions.path
+  }
+  let isJson = false
+  if (isPlainObject(body) || Array.isArray(body)) {
+    isJson = true
+    body = JSON.stringify(body)
+  }
+  const headers: Record<string, string> = {
+    ...(httpsOptions.headers as any),
+  }
+  if (contentType) {
+    headers['Content-Type'] = contentType
+  } else if (!httpsOptions.headers?.['Content-Type'] && isJson) {
+    headers['Content-Type'] = 'application/json'
+  }
+
+  let retry = 0
+  while (true) {
+    try {
+      const res = await fetch(url, {
+        headers,
+        protocol: httpsOptions.protocol || undefined,
+        method,
+        agent: httpsOptions.agent,
+        body,
+      })
+
+      const isSuccess = res.status >= 200 && res.status < 300
+      const contentType = res.headers.get('content-type')
+      const isJsonResponse = contentType?.includes('application/json') ?? false
+
+      if (isSuccess && isJsonResponse) {
+        return (await res.json()) as Response
+      }
+
+      // helpful message for debugging
+      const text = await res.text()
+      if (res.status === 404 && text.includes('404 page not found')) {
+        console.info(
+          `Did you forget to install your Custom Resources Definitions? path: ${httpsOptions.path}`
+        )
+      }
+      throw new Error(text)
+    } catch (e: any) {
+      retry++
+
+      if (
+        !(await options.retryCondition({
+          res: e?.value?.res,
+          error: e,
+          args,
+          attempt: retry,
+          options: options,
+        }))
+      ) {
+        throw e
+      }
+
+      await options.backoff(retry, options.maxRetries)
+    }
+  }
+}
+
+const toSearchParams = (params: Record<string, string>) => {
+  return new URLSearchParams(removeNullableProperties(params))
+}
diff --git a/examples/generate-vercel-client/justfile b/examples/generate-vercel-client/justfile
new file mode 100644
index 00000000..74ba1e85
--- /dev/null
+++ b/examples/generate-vercel-client/justfile
@@ -0,0 +1,9 @@
+update-swagger:
+  #!/bin/sh
+  # Swaggerが壊れています. 一時的に手動でパッチしています.
+  # https://github.com/orgs/vercel/discussions/4813#discussioncomment-7539757
+  wget -O swagger.json https://openapi.vercel.sh/
+
+generate-code:
+  #!/bin/sh
+  npx kubernetes-typescript-client-codegen-openapi ./vercel.config.ts
diff --git a/examples/generate-vercel-client/vercel.config.ts b/examples/generate-vercel-client/vercel.config.ts
new file mode 100644
index 00000000..f9f48f54
--- /dev/null
+++ b/examples/generate-vercel-client/vercel.config.ts
@@ -0,0 +1,10 @@
+import type { ConfigFile } from 'kubernetes-typescript-client-codegen-openapi'
+
+const config: ConfigFile = {
+  schemaFile: './swagger.json',
+  apiFile: './api-client/client.ts',
+  outputFile: './generated/vercel.ts',
+  strict: false,
+}
+
+export default config