feat: add /api/openapi.json discovery endpoint (#462)

Author: brendanjryan

package.json

@@ -25,7 +25,7 @@
     "@stripe/stripe-js": "^8.9.0",
     "@vercel/blob": "^2.3.1",
     "mermaid": "^11.12.2",
-    "mppx": "~0.4.2",
+    "mppx": "https://pkg.pr.new/mppx@235",
     "react": "^19",
     "react-dom": "^19",
     "stripe": "^20.4.1",

pnpm-lock.yaml

@@ -0,0 +1,27 @@
+import { discovery } from "mppx/nextjs";
+import { mppx } from "../../../mppx.server";
+
+const USDC = "0x20c000000000000000000000b9537d11c60e8b50";
+
+export const GET = discovery(mppx, {
+  info: { title: "mpp.dev", version: "1.0.0" },
+  routes: [
+    {
+      handler: mppx.charge({
+        amount: "0.1",
+        currency: USDC,
+        description: "Ping endpoint access",
+      }),
+      method: "get",
+      path: "/api/ping/paid",
+      summary: "Paid ping — returns a greeting after payment",
+    },
+  ],
+  serviceInfo: {
+    categories: ["web"],
+    docs: {
+      homepage: "https://mpp.dev",
+      llms: "https://mpp.dev/llms.txt",
+    },
+  },
+});