diff --git a/apisix/plugins/ai-proxy/drivers/openai.lua b/apisix/plugins/ai-proxy/drivers/openai.lua
index c8f7f4b6223f..cefc5a728eaa 100644
--- a/apisix/plugins/ai-proxy/drivers/openai.lua
+++ b/apisix/plugins/ai-proxy/drivers/openai.lua
@@ -42,11 +42,11 @@ function _M.request(conf, request_table, ctx)
     end
 
     local ok, err = httpc:connect({
-        scheme = parsed_url.scheme or "https",
-        host = parsed_url.host or DEFAULT_HOST,
-        port = parsed_url.port or DEFAULT_PORT,
+        scheme = endpoint and parsed_url.scheme or "https",
+        host = endpoint and parsed_url.host or DEFAULT_HOST,
+        port = endpoint and parsed_url.port or DEFAULT_PORT,
         ssl_verify = conf.ssl_verify,
-        ssl_server_name = parsed_url.host or DEFAULT_HOST,
+        ssl_server_name = endpoint and parsed_url.host or DEFAULT_HOST,
         pool_size = conf.keepalive and conf.keepalive_pool,
     })
 
@@ -54,7 +54,7 @@ function _M.request(conf, request_table, ctx)
         return nil, "failed to connect to LLM server: " .. err
     end
 
-    local path = (parsed_url.path or DEFAULT_PATH)
+    local path = (endpoint and parsed_url.path or DEFAULT_PATH)
 
     local headers = (conf.auth.header or {})
     headers["Content-Type"] = "application/json"
diff --git a/t/APISIX.pm b/t/APISIX.pm
index 50f7cfaecab6..2e1724a12aa1 100644
--- a/t/APISIX.pm
+++ b/t/APISIX.pm
@@ -465,6 +465,8 @@ _EOC_
         $block->set_value("stream_config", $stream_config);
     }
 
+    my $custom_trusted_cert = $block->custom_trusted_cert // 'cert/apisix.crt';
+
     my $stream_server_config = $block->stream_server_config // <<_EOC_;
     listen 2005 ssl;
     ssl_certificate             cert/apisix.crt;
@@ -737,7 +739,7 @@ _EOC_
         http3 off;
         ssl_certificate             cert/apisix.crt;
         ssl_certificate_key         cert/apisix.key;
-        lua_ssl_trusted_certificate cert/apisix.crt;
+        lua_ssl_trusted_certificate $custom_trusted_cert;
 
         ssl_protocols TLSv1.1 TLSv1.2 TLSv1.3;
 
diff --git a/t/plugin/ai-proxy2.t b/t/plugin/ai-proxy2.t
index 6e398e5665a4..cda3786b7e75 100644
--- a/t/plugin/ai-proxy2.t
+++ b/t/plugin/ai-proxy2.t
@@ -198,3 +198,58 @@ POST /anything
 --- error_code: 200
 --- response_body
 passed
+
+
+
+=== TEST 5: set route without overriding the endpoint_url
+--- config
+    location /t {
+        content_by_lua_block {
+            local t = require("lib.test_admin").test
+            local code, body = t('/apisix/admin/routes/1',
+                 ngx.HTTP_PUT,
+                [[{
+                    "uri": "/anything",
+                    "plugins": {
+                        "ai-proxy": {
+                            "auth": {
+                                "header": {
+                                    "Authorization": "some-key"
+                                }
+                            },
+                            "model": {
+                                "provider": "openai",
+                                "name": "gpt-4",
+                                "options": {
+                                    "max_tokens": 512,
+                                    "temperature": 1.0
+                                }
+                            }
+                        }
+                    },
+                    "upstream": {
+                        "type": "roundrobin",
+                        "nodes": {
+                            "httpbin.org": 1
+                        }
+                    }
+                }]]
+            )
+
+            if code >= 300 then
+                ngx.status = code
+            end
+            ngx.say(body)
+        }
+    }
+--- response_body
+passed
+
+
+
+=== TEST 6: send request
+--- custom_trusted_cert: /etc/ssl/certs/ca-certificates.crt
+--- request
+POST /anything
+{ "messages": [ { "role": "system", "content": "You are a mathematician" }, { "role": "user", "content": "What is 1+1?"} ] }
+--- error_code: 401