diff --git a/src/main/scala/algoliasearch/ApiClient.scala b/src/main/scala/algoliasearch/ApiClient.scala
index 6d10169c..79bee859 100644
--- a/src/main/scala/algoliasearch/ApiClient.scala
+++ b/src/main/scala/algoliasearch/ApiClient.scala
@@ -40,6 +40,8 @@ abstract class ApiClient(
     throw AlgoliaClientException("`apiKey` is missing.")
   }
 
+  private val authInterceptor = new AuthInterceptor(appId, apiKey)
+
   private val requester = options.customRequester match {
     case Some(customRequester) => customRequester
     case None =>
@@ -62,7 +64,7 @@ abstract class ApiClient(
 
     val builder = HttpRequester
       .builder(options.customFormats.getOrElse(formats))
-      .withInterceptor(new AuthInterceptor(appId, apiKey))
+      .withInterceptor(authInterceptor)
       .withInterceptor(new UserAgentInterceptor(algoliaAgent))
       .withInterceptor(new RetryStrategy(statefulHosts))
 
@@ -89,4 +91,8 @@ abstract class ApiClient(
   override def close(): Unit = {
     Try(requester.close())
   }
+
+  def setClientApiKey(apiKey: String): Unit = {
+    authInterceptor.setApiKey(apiKey)
+  }
 }
diff --git a/src/main/scala/algoliasearch/internal/interceptor/AuthInterceptor.scala b/src/main/scala/algoliasearch/internal/interceptor/AuthInterceptor.scala
index 2d32bb8b..b9b72f17 100644
--- a/src/main/scala/algoliasearch/internal/interceptor/AuthInterceptor.scala
+++ b/src/main/scala/algoliasearch/internal/interceptor/AuthInterceptor.scala
@@ -11,12 +11,16 @@ import okhttp3.{Interceptor, Response}
   */
 private[algoliasearch] class AuthInterceptor(
     applicationId: String,
-    apiKey: String
+    private var apiKey: String
 ) extends Interceptor {
 
   private val HeaderApplicationId = "x-algolia-application-id"
   private val HeaderApiKey = "x-algolia-api-key"
 
+  def setApiKey(newApiKey: String): Unit = {
+    apiKey = newApiKey
+  }
+
   override def intercept(chain: Interceptor.Chain): Response = {
     val originalRequest = chain.request()
     val builder = originalRequest.newBuilder()