diff --git a/client/src/http_sender.rs b/client/src/http_sender.rs
index 0a7558c6f1..f8b4182135 100644
--- a/client/src/http_sender.rs
+++ b/client/src/http_sender.rs
@@ -37,14 +37,14 @@ impl HttpSender {
     ///
     /// The URL is an HTTP URL, usually for port 8899, as in
     /// "http://localhost:8899". The sender has a default timeout of 30 seconds.
-    pub fn new(url: String) -> Self {
+    pub fn new<U: ToString>(url: U) -> Self {
         Self::new_with_timeout(url, Duration::from_secs(30))
     }
 
     /// Create an HTTP RPC sender.
     ///
     /// The URL is an HTTP URL, usually for port 8899.
-    pub fn new_with_timeout(url: String, timeout: Duration) -> Self {
+    pub fn new_with_timeout<U: ToString>(url: U, timeout: Duration) -> Self {
         // `reqwest::blocking::Client` panics if run in a tokio async context.  Shuttle the
         // request to a different tokio thread to avoid this
         let client = Arc::new(
@@ -58,7 +58,7 @@ impl HttpSender {
 
         Self {
             client,
-            url,
+            url: url.to_string(),
             request_id: AtomicU64::new(0),
             stats: RwLock::new(RpcTransportStats::default()),
         }
diff --git a/client/src/mock_sender.rs b/client/src/mock_sender.rs
index a7d8344fe6..f774f091a5 100644
--- a/client/src/mock_sender.rs
+++ b/client/src/mock_sender.rs
@@ -75,13 +75,13 @@ pub struct MockSender {
 ///    from [`RpcRequest`] to a JSON [`Value`] response, Any entries in this map
 ///    override the default behavior for the given request.
 impl MockSender {
-    pub fn new(url: String) -> Self {
+    pub fn new<U: ToString>(url: U) -> Self {
         Self::new_with_mocks(url, Mocks::default())
     }
 
-    pub fn new_with_mocks(url: String, mocks: Mocks) -> Self {
+    pub fn new_with_mocks<U: ToString>(url: U, mocks: Mocks) -> Self {
         Self {
-            url,
+            url: url.to_string(),
             mocks: RwLock::new(mocks),
         }
     }
diff --git a/client/src/rpc_client.rs b/client/src/rpc_client.rs
index e36169a85f..0ea0e93d06 100644
--- a/client/src/rpc_client.rs
+++ b/client/src/rpc_client.rs
@@ -191,7 +191,7 @@ impl RpcClient {
     /// let url = "http://localhost:8899".to_string();
     /// let client = RpcClient::new(url);
     /// ```
-    pub fn new(url: String) -> Self {
+    pub fn new<U: ToString>(url: U) -> Self {
         Self::new_with_commitment(url, CommitmentConfig::default())
     }
 
@@ -214,7 +214,7 @@ impl RpcClient {
     /// let commitment_config = CommitmentConfig::processed();
     /// let client = RpcClient::new_with_commitment(url, commitment_config);
     /// ```
-    pub fn new_with_commitment(url: String, commitment_config: CommitmentConfig) -> Self {
+    pub fn new_with_commitment<U: ToString>(url: U, commitment_config: CommitmentConfig) -> Self {
         Self::new_sender(
             HttpSender::new(url),
             RpcClientConfig::with_commitment(commitment_config),
@@ -240,7 +240,7 @@ impl RpcClient {
     /// let timeout = Duration::from_secs(1);
     /// let client = RpcClient::new_with_timeout(url, timeout);
     /// ```
-    pub fn new_with_timeout(url: String, timeout: Duration) -> Self {
+    pub fn new_with_timeout<U: ToString>(url: U, timeout: Duration) -> Self {
         Self::new_sender(
             HttpSender::new_with_timeout(url, timeout),
             RpcClientConfig::with_commitment(CommitmentConfig::default()),
@@ -269,8 +269,8 @@ impl RpcClient {
     ///     commitment_config,
     /// );
     /// ```
-    pub fn new_with_timeout_and_commitment(
-        url: String,
+    pub fn new_with_timeout_and_commitment<U: ToString>(
+        url: U,
         timeout: Duration,
         commitment_config: CommitmentConfig,
     ) -> Self {
@@ -312,8 +312,8 @@ impl RpcClient {
     ///     confirm_transaction_initial_timeout,
     /// );
     /// ```
-    pub fn new_with_timeouts_and_commitment(
-        url: String,
+    pub fn new_with_timeouts_and_commitment<U: ToString>(
+        url: U,
         timeout: Duration,
         commitment_config: CommitmentConfig,
         confirm_transaction_initial_timeout: Duration,
@@ -347,7 +347,7 @@ impl RpcClient {
     /// let url = "fails".to_string();
     /// let successful_client = RpcClient::new_mock(url);
     /// ```
-    pub fn new_mock(url: String) -> Self {
+    pub fn new_mock<U: ToString>(url: U) -> Self {
         Self::new_sender(
             MockSender::new(url),
             RpcClientConfig::with_commitment(CommitmentConfig::default()),
@@ -381,7 +381,7 @@ impl RpcClient {
     /// let url = "succeeds".to_string();
     /// let client = RpcClient::new_mock_with_mocks(url, mocks);
     /// ```
-    pub fn new_mock_with_mocks(url: String, mocks: Mocks) -> Self {
+    pub fn new_mock_with_mocks<U: ToString>(url: U, mocks: Mocks) -> Self {
         Self::new_sender(
             MockSender::new_with_mocks(url, mocks),
             RpcClientConfig::with_commitment(CommitmentConfig::default()),