diff --git a/src/rondevu.ts b/src/rondevu.ts
index 601ce54..1a5dabf 100644
--- a/src/rondevu.ts
+++ b/src/rondevu.ts
@@ -176,21 +176,15 @@ export class Rondevu {
 
         const { serviceFqn, offers, ttl } = options
 
-        // Generate signature for service publication
-        const message = `publish:${this.username}:${serviceFqn}:${Date.now()}`
-        const signature = await RondevuAPI.signMessage(message, this.keypair.privateKey)
-
-        // Create service request
-        const serviceRequest: ServiceRequest = {
-            serviceFqn, // Must include @username
-            offers,
-            signature,
-            message,
-            ttl,
-        }
-
         // Publish to server (server will auto-claim username if needed)
-        const result = await this.getAPI().publishService(serviceRequest)
+        // Note: signature and message are generated by the API layer
+        const result = await this.getAPI().publishService({
+            serviceFqn,
+            offers,
+            ttl,
+            signature: '', // Not used, generated by API layer
+            message: '',   // Not used, generated by API layer
+        })
 
         // Mark username as claimed after successful publish
         this.usernameClaimed = true