diff --git a/mod_playht_tts/mod_playht_tts.c b/mod_playht_tts/mod_playht_tts.c
index 8d4bb23..3c71998 100644
--- a/mod_playht_tts/mod_playht_tts.c
+++ b/mod_playht_tts/mod_playht_tts.c
@@ -14,6 +14,10 @@ static void clearPlayht(playht_t* p, int freeAll) {
   if (p->seed) free(p->seed);
   if (p->temperature) free(p->temperature);
   if (p->voice_engine) free(p->voice_engine);
+  if (p->synthesize_url) free(p->synthesize_url);
+  if (p->language) free(p->language);
+  if (p->top_p) free(p->top_p);
+  if (p->repetition_penalty) free(p->repetition_penalty);
   if (p->emotion) free(p->emotion);
   if (p->voice_guidance) free(p->voice_guidance);
   if (p->style_guidance) free(p->style_guidance);
@@ -36,6 +40,10 @@ static void clearPlayht(playht_t* p, int freeAll) {
   p->seed = NULL;
   p->temperature = NULL;
   p->voice_engine = NULL;
+  p->synthesize_url = NULL;
+  p->language = NULL;
+  p->top_p = NULL;
+  p->repetition_penalty = NULL;
   p->emotion = NULL;
   p->voice_guidance = NULL;
   p->style_guidance = NULL;
@@ -154,6 +162,18 @@ static void p_text_param_tts(switch_speech_handle_t *sh, char *param, const char
   } else if (0 == strcmp(param, "voice_engine")) {
     if (p->voice_engine) free(p->voice_engine);
     p->voice_engine = strdup(val);
+  } else if (0 == strcmp(param, "synthesize_url")) {
+    if (p->synthesize_url) free(p->synthesize_url);
+    p->synthesize_url = strdup(val);
+  } else if (0 == strcmp(param, "language")) {
+    if (p->language) free(p->language);
+    p->language = strdup(val);
+  } else if (0 == strcmp(param, "top_p")) {
+    if (p->top_p) free(p->top_p);
+    p->top_p = strdup(val);
+  } else if (0 == strcmp(param, "repetition_penalty")) {
+    if (p->repetition_penalty) free(p->repetition_penalty);
+    p->repetition_penalty = strdup(val);
   } else if (0 == strcmp(param, "emotion")) {
     if (p->emotion) free(p->emotion);
     p->emotion = strdup(val);
diff --git a/mod_playht_tts/mod_playht_tts.h b/mod_playht_tts/mod_playht_tts.h
index 5d44cb1..1f1bfcd 100644
--- a/mod_playht_tts/mod_playht_tts.h
+++ b/mod_playht_tts/mod_playht_tts.h
@@ -11,10 +11,14 @@ typedef struct playht_data {
   char *seed;
   char *temperature;
   char *voice_engine;
+  char *synthesize_url;
+  char *language;
   char *emotion;
   char *voice_guidance;
   char *style_guidance;
   char *text_guidance;
+  char *top_p;
+  char *repetition_penalty;
 
   /* result data */
   long response_code;
diff --git a/mod_playht_tts/playht_glue.cpp b/mod_playht_tts/playht_glue.cpp
index 01e468f..42d163d 100644
--- a/mod_playht_tts/playht_glue.cpp
+++ b/mod_playht_tts/playht_glue.cpp
@@ -780,7 +780,7 @@ extern "C" {
     }
 
     /* format url*/
-    std::string url = "https://api.play.ht/api/v2/tts/stream";
+    std::string url = p->synthesize_url;
 
     /* create the JSON body */
     cJSON * jResult = cJSON_CreateObject();
@@ -800,9 +800,6 @@ extern "C" {
         cJSON_AddNumberToObject(jResult, "speed", val);
       }
     }
-    if (p->seed) {
-      cJSON_AddNumberToObject(jResult, "seed", atoi(p->seed));
-    }
     if (p->temperature) {
       cJSON_AddNumberToObject(jResult, "temperature", std::strtof(p->temperature, nullptr));
     }
@@ -818,6 +815,15 @@ extern "C" {
     if (p->text_guidance) {
       cJSON_AddNumberToObject(jResult, "text_guidance", atoi(p->text_guidance));
     }
+    if (strcmp(p->voice_engine, "Play3.0") == 0 && p->language) {
+      cJSON_AddStringToObject(jResult, "language", p->language);
+    }
+    if (p->repetition_penalty) {
+      cJSON_AddNumberToObject(jResult, "repetition_penalty", std::strtof(p->repetition_penalty, nullptr));
+    }
+    if (p->top_p) {
+      cJSON_AddNumberToObject(jResult, "top_p", std::strtof(p->top_p, nullptr));
+    }
     char *json = cJSON_PrintUnformatted(jResult);
 
     cJSON_Delete(jResult);
@@ -889,9 +895,12 @@ extern "C" {
 
     /* call this function to close a socket */
     curl_easy_setopt(easy, CURLOPT_CLOSESOCKETFUNCTION, close_socket);
+    // Play3.0 voice engine doesn't need authorization
+    if (strcmp(p->voice_engine, "Play3.0") != 0) {
+      conn->hdr_list = curl_slist_append(conn->hdr_list, api_key_stream.str().c_str());
+      conn->hdr_list = curl_slist_append(conn->hdr_list, user_id_stream.str().c_str());
+    }
 
-    conn->hdr_list = curl_slist_append(conn->hdr_list, api_key_stream.str().c_str());
-    conn->hdr_list = curl_slist_append(conn->hdr_list, user_id_stream.str().c_str());
     conn->hdr_list = curl_slist_append(conn->hdr_list, "Accept: audio/mpeg");
     conn->hdr_list = curl_slist_append(conn->hdr_list, "Content-Type: application/json");
     curl_easy_setopt(easy, CURLOPT_HTTPHEADER, conn->hdr_list);