diff --git a/modules/pubmatic/openwrap/adapters/bidders.go b/modules/pubmatic/openwrap/adapters/bidders.go
index 678dc601ec8..d8feb482c81 100644
--- a/modules/pubmatic/openwrap/adapters/bidders.go
+++ b/modules/pubmatic/openwrap/adapters/bidders.go
@@ -730,3 +730,22 @@ func builderAidem(params BidderParameters) (json.RawMessage, error) {
 
 	return jsonStr.Bytes(), nil
 }
+
+func builderCompass(params BidderParameters) (json.RawMessage, error) {
+	jsonStr := bytes.Buffer{}
+	jsonStr.WriteByte('{')
+	oneOf := []string{"placementId", "endpointId"}
+	for _, param := range oneOf {
+		if key, ok := getString(params.FieldMap[param]); ok {
+			fmt.Fprintf(&jsonStr, `"%s":"%s"`, param, key)
+			break
+		}
+	}
+	//  len=0 (no mandatory params present)
+	if jsonStr.Len() == 1 {
+		return nil, fmt.Errorf(errMandatoryParameterMissingFormat, params.AdapterName, oneOf)
+	}
+
+	jsonStr.WriteByte('}')
+	return jsonStr.Bytes(), nil
+}
diff --git a/modules/pubmatic/openwrap/adapters/bidders_test.go b/modules/pubmatic/openwrap/adapters/bidders_test.go
index 08c01d55a5c..52783889c68 100644
--- a/modules/pubmatic/openwrap/adapters/bidders_test.go
+++ b/modules/pubmatic/openwrap/adapters/bidders_test.go
@@ -3119,3 +3119,50 @@ func Test_builderAidem(t *testing.T) {
 		})
 	}
 }
+
+func TestBuilderCompass(t *testing.T) {
+	type args struct {
+		params BidderParameters
+	}
+	tests := []struct {
+		name    string
+		args    args
+		want    json.RawMessage
+		wantErr bool
+	}{
+		{
+			name:    "Valid Scenerio (oneOf placementId or endpointId) is present-placementId",
+			args:    args{params: BidderParameters{FieldMap: JSONObject{"placementId": "dbdsfh"}}},
+			want:    json.RawMessage(`{"placementId": "dbdsfh"}`),
+			wantErr: false,
+		},
+		{
+			name:    "Valid Scenerio (oneOf placementId or endpointId) is present-endpointId",
+			args:    args{params: BidderParameters{FieldMap: JSONObject{"endpointId": "dbdsfh"}}},
+			want:    json.RawMessage(`{"endpointId": "dbdsfh"}`),
+			wantErr: false,
+		},
+		{
+			name:    "Valid Scenerio (oneOf placementId or endpointId), Both are present",
+			args:    args{params: BidderParameters{FieldMap: JSONObject{"placementId": "sdhks", "endpointId": "sdjksd"}}},
+			want:    json.RawMessage(`{"placementId": "sdhks"}`),
+			wantErr: false,
+		},
+		{
+			name:    "Invalid Scenerio (None Of placementId or endpointId) is present",
+			args:    args{params: BidderParameters{FieldMap: JSONObject{}}},
+			want:    json.RawMessage(``),
+			wantErr: true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := builderCompass(tt.args.params)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("builderCompass() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			AssertJSON(t, tt.want, got)
+		})
+	}
+}
diff --git a/modules/pubmatic/openwrap/adapters/builder.go b/modules/pubmatic/openwrap/adapters/builder.go
index 23ce21b68b7..c2996005017 100644
--- a/modules/pubmatic/openwrap/adapters/builder.go
+++ b/modules/pubmatic/openwrap/adapters/builder.go
@@ -59,6 +59,7 @@ func initBidderBuilderFactory() {
 		string(openrtb_ext.BidderKargo):          builderKargo,
 		string(openrtb_ext.BidderPGAMSsp):        builderPGAMSSP,
 		string(openrtb_ext.BidderAidem):          builderAidem,
+		string(openrtb_ext.BidderCompass):        builderCompass,
 	}
 }
 
diff --git a/modules/pubmatic/openwrap/adapters/tests/s2s_bidders.json b/modules/pubmatic/openwrap/adapters/tests/s2s_bidders.json
index 12cefbbf095..9a0d55a1bbe 100644
--- a/modules/pubmatic/openwrap/adapters/tests/s2s_bidders.json
+++ b/modules/pubmatic/openwrap/adapters/tests/s2s_bidders.json
@@ -136,5 +136,20 @@
                 "siteId":"abcdefg"
             }
         }
+    },
+    {
+        "name": "compass_json_OneOf - placementId/endpointId",
+        "args" : {
+            "adapterName": "compass",
+            "requestJSON": {
+                "placementId": "123456",
+                "endpointId": "abcdefg"   
+            }
+        },
+        "want": {
+            "expectedJSON": {
+                "placementId": "123456"
+            }
+        }
     }
 ]
\ No newline at end of file