diff --git a/src/main/java/com/uid2/optout/partner/EndpointConfig.java b/src/main/java/com/uid2/optout/partner/EndpointConfig.java
index 89fdd37..00f9955 100644
--- a/src/main/java/com/uid2/optout/partner/EndpointConfig.java
+++ b/src/main/java/com/uid2/optout/partner/EndpointConfig.java
@@ -45,8 +45,9 @@ public static EndpointConfig fromJsonObject(JsonObject obj) throws JsonProcessin
     public static EndpointConfig fromJsonString(String str) throws JsonProcessingException, InvalidPropertiesFormatException {
         EndpointConfig ret = EndpointConfig.mapper.readValue(str, EndpointConfig.class);
 
-        // normalize name and URL, query_params and additional_headers are spared)
-        ret.url = ret.url.toLowerCase();
+        // normalize name, query_params and additional_headers are spared)
+        // UID2-3697 do not normalize/lower case ret.url as it doesn't just contain the top level domain/hostname
+        // but also optional path which is case sensitive
         ret.name = ret.name.toLowerCase();
 
         // validate query_params, param should be in the format of key=val
diff --git a/src/test/java/com/uid2/optout/partner/OptOutPartnerTest.java b/src/test/java/com/uid2/optout/partner/OptOutPartnerTest.java
index c80cf89..0b5c724 100644
--- a/src/test/java/com/uid2/optout/partner/OptOutPartnerTest.java
+++ b/src/test/java/com/uid2/optout/partner/OptOutPartnerTest.java
@@ -38,7 +38,8 @@ public void tearDown(TestContext ctx) {
     public void internalSite_expectSuccess(TestContext ctx) throws JsonProcessingException, InvalidPropertiesFormatException {
         String partnerConfigStr = "{" +
                 "      \"name\": \"ttd\",\n" +
-                "      \"url\": \"http://localhost:18083/uid2optout\",\n" +
+                //UID2-3697 intentionally added some upper cases to make sure the url is the same as what's provided by DSP originally
+                "      \"url\": \"http://localhost:18083/AdServer/uid2optout\",\n" +
                 "      \"method\": \"GET\",\n" +
                 "      \"query_params\": [\n" +
                 "        \"uid2=${ADVERTISING_ID}\",\n" +
@@ -93,7 +94,7 @@ private void testConfig_expectSuccess(TestContext ctx, String partnerConfigStr,
         if (createInternalTestServer) {
             Async async = ctx.async();
             HttpServer server = this.createTestServer(ctx, req -> {
-                ctx.assertEquals("/uid2optout", req.path());
+                ctx.assertEquals("/AdServer/uid2optout", req.path());
 
                 String uid2Expected = OptOutEntry.idHashB64FromLong(1234);
                 String uid2 = req.getParam(OptOutPartnerTest.PARAM_UID2);