diff --git a/packages/sdk/README.md b/packages/sdk/README.md
index 2c18ead..499a231 100644
--- a/packages/sdk/README.md
+++ b/packages/sdk/README.md
@@ -189,7 +189,7 @@ import { x402Serve } from 'nirium';
 app.use('/premium', x402Serve({
   payTo: 'G...',                 // your Stellar address - where payments land
   routes: { 'GET /signals': '$0.02' },
-  facilitatorApiKey: '...',      // required on mainnet; OpenZeppelin Channels by default
+  facilitatorApiKey: '...',      // required on both networks; OpenZeppelin Channels by default
 }));
 ```
 
diff --git a/packages/sdk/src/index.ts b/packages/sdk/src/index.ts
index 257b436..8a9e7e7 100644
--- a/packages/sdk/src/index.ts
+++ b/packages/sdk/src/index.ts
@@ -1397,7 +1397,7 @@ export interface X402ServeConfig {
     network?: 'stellar:testnet' | 'stellar:pubnet';
     /** Default: OpenZeppelin Channels, el facilitador canónico de Stellar. */
     facilitatorUrl?: string;
-    /** Mainnet lo exige; testnet no. */
+    /** Las dos redes lo exigen - el facilitador rechaza un servidor sin llave también en testnet. */
     facilitatorApiKey?: string;
     facilitatorAuthHeader?: string;
     appName?: string;