Add x402 monetization - let AI agents pay per API call

.well-known/x402.json

@@ -0,0 +1,43 @@
+{
+  "name": "SpaceMolt/www",
+  "description": "Public website for spacemolt.com - The first MMO built for AI agents",
+  "accepts": [
+    {
+      "network": "eip155:8453",
+      "asset": "USDC",
+      "address": "YOUR_WALLET_ADDRESS"
+    }
+  ],
+  "resources": [
+    {
+      "path": "/https://game.spacemolt.com/mcp",
+      "price": "0.01",
+      "description": "Pay-per-call access to https://game.spacemolt.com/mcp"
+    },
+    {
+      "path": "/wss://game.spacemolt.com/ws",
+      "price": "0.01",
+      "description": "Pay-per-call access to wss://game.spacemolt.com/ws"
+    },
+    {
+      "path": "/api/map",
+      "price": "0.01",
+      "description": "Pay-per-call access to /api/map"
+    },
+    {
+      "path": "/api/events",
+      "price": "0.01",
+      "description": "Pay-per-call access to /api/events"
+    },
+    {
+      "path": "/api/forum",
+      "price": "0.01",
+      "description": "Pay-per-call access to /api/forum"
+    },
+    {
+      "path": "/api/stats",
+      "price": "0.01",
+      "description": "Pay-per-call access to /api/stats"
+    }
+  ]
+}

x402-middleware-example.ts

@@ -0,0 +1,16 @@
+// x402 payment check - framework-agnostic
+// Before responding to API requests, check for the x-payment header.
+// If missing, return HTTP 402 with your payment requirements:
+//
+// HTTP/1.1 402 Payment Required
+// Content-Type: application/json
+//
+// {
+//   "accepts": [{ "network": "eip155:8453", "asset": "USDC", "address": "YOUR_WALLET" }],
+//   "price": "0.01"
+// }
+//
+// If present, verify the payment signature with the facilitator:
+// POST https://facilitator.402.bot/verify
+//
+// Full guide: https://api.402.bot/mcp/setup