diff --git a/metrics/http.go b/metrics/http.go
index 26d0c40..d0e4563 100644
--- a/metrics/http.go
+++ b/metrics/http.go
@@ -9,9 +9,11 @@ var (
 	statusBadRequest          = metrics.NewCounter(`http_requests_total{status="400"}`)
 	statusNotFound            = metrics.NewCounter(`http_requests_total{status="404"}`)
 	statusInternalServerError = metrics.NewCounter(`http_requests_total{status="500"}`)
+	UrlParamUsage             = metrics.NewCounter(`http_requests_params{name="url"}`)
 )
 
 func StatusOKInc()                  { statusOK.Inc() }
 func StatusBadRequestInc()          { statusBadRequest.Inc() }
 func StatusNotFoundInc()            { statusNotFound.Inc() }
 func StatusInternalServerErrorInc() { statusInternalServerError.Inc() }
+func UrlParamUsageInc()             { UrlParamUsage.Inc() }
diff --git a/server/request_handler.go b/server/request_handler.go
index 1ebd5ac..2cb994c 100644
--- a/server/request_handler.go
+++ b/server/request_handler.go
@@ -115,6 +115,7 @@ func (r *RpcRequestHandler) process() {
 	// e.g. https://rpc.flashbots.net?url=http://RPC-ENDPOINT.COM
 	customProxyUrl, ok := r.req.URL.Query()["url"]
 	if ok && len(customProxyUrl[0]) > 1 {
+		metrics.UrlParamUsageInc()
 		r.defaultProxyUrl = customProxyUrl[0]
 		r.logger.Info("[process] Using custom url", "url", r.defaultProxyUrl)
 	}
diff --git a/server/request_handler_test.go b/server/request_handler_test.go
index cfdf2e5..d454194 100644
--- a/server/request_handler_test.go
+++ b/server/request_handler_test.go
@@ -7,6 +7,7 @@ import (
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/log"
+	"github.com/flashbots/rpc-endpoint/metrics"
 	"github.com/stretchr/testify/require"
 )
 
@@ -92,3 +93,16 @@ func TestGetEffectiveParametersHeaderNoPreset(t *testing.T) {
 	require.NoError(t, err)
 	require.Equal(t, "fallback-user", params.originId)
 }
+
+func TestRpcRequestHandler_UrlParam(t *testing.T) {
+	wrec := httptest.NewRecorder()
+	req := httptest.NewRequest("POST", "/?url=http://mock.url", nil)
+
+	metrics.UrlParamUsage.Set(0)
+
+	var rw http.ResponseWriter = wrec
+	rh := NewRpcRequestHandler(log.New(), &rw, req, "", 0, nil, "", nil, nil, nil, nil, nil, nil)
+	rh.process()
+
+	require.Equal(t, uint64(1), metrics.UrlParamUsage.Get())
+}