diff --git a/index.d.ts b/index.d.ts
index ec85b03..510c0b7 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -163,6 +163,15 @@ declare global {
        */
       userTokens(options?: UserTokensOptions): Promise<UserTokensResult>;
 
+      /**
+       * Retrieves token balance from the user's active wallet.
+       *
+       * @param id - The unique identifier (processId) of the token.
+       * @returns A Promise resolving to the token balance as a string.
+       * @throws An error if the balance cannot be retrieved.
+       */
+      tokenBalance(id: string): Promise<string>;
+
       /**
        * Checks if a token has been added to ArConnect
        *