diff --git a/.changeset/witty-mails-travel.md b/.changeset/witty-mails-travel.md
new file mode 100644
index 00000000..be55ccaa
--- /dev/null
+++ b/.changeset/witty-mails-travel.md
@@ -0,0 +1,5 @@
+---
+'@solana/wallet-standard-features': minor
+---
+
+Add `mode` option to `signAndSendTransaction` input
diff --git a/packages/core/features/src/signAndSendTransaction.ts b/packages/core/features/src/signAndSendTransaction.ts
index b4d84895..61f4f06f 100644
--- a/packages/core/features/src/signAndSendTransaction.ts
+++ b/packages/core/features/src/signAndSendTransaction.ts
@@ -55,6 +55,9 @@ export interface SolanaSignAndSendTransactionOutput {
 
 /** Options for signing and sending a transaction. */
 export type SolanaSignAndSendTransactionOptions = SolanaSignTransactionOptions & {
+    /** Mode for signing and sending transactions. */
+    readonly mode?: SolanaSignAndSendTransactionMode;
+
     /** Desired commitment level. If provided, confirm the transaction after sending. */
     readonly commitment?: SolanaTransactionCommitment;
 
@@ -64,3 +67,6 @@ export type SolanaSignAndSendTransactionOptions = SolanaSignTransactionOptions &
     /** Maximum number of times for the RPC node to retry sending the transaction to the leader. */
     readonly maxRetries?: number;
 };
+
+/** Mode for signing and sending transactions. */
+export type SolanaSignAndSendTransactionMode = 'parallel' | 'serial';