diff --git a/.changeset/moody-humans-grow.md b/.changeset/moody-humans-grow.md
new file mode 100644
index 000000000..469df9d29
--- /dev/null
+++ b/.changeset/moody-humans-grow.md
@@ -0,0 +1,5 @@
+---
+'@modelcontextprotocol/server': patch
+---
+
+Modify registerPrompt to accept undefined Args type
diff --git a/packages/server/src/server/mcp.ts b/packages/server/src/server/mcp.ts
index 316074e2d..31785cc6d 100644
--- a/packages/server/src/server/mcp.ts
+++ b/packages/server/src/server/mcp.ts
@@ -923,7 +923,7 @@ export class McpServer {
      * );
      * ```
      */
-    registerPrompt<Args extends AnySchema>(
+    registerPrompt<Args extends AnySchema | undefined = undefined>(
         name: string,
         config: {
             title?: string;