modelcontextprotocol · MiguelsPizza · Feb 3, 2026 · Feb 3, 2026 · Feb 3, 2026 · Feb 3, 2026
diff --git a/.gitignore b/.gitignore
@@ -8,8 +8,32 @@ docs/api/
 tmp/
 intermediate-findings/
 
+# Environment + logs
+.env
+.env.*
+!.env.example
+!.env.sample
+!.env.template
+*.log
+
+# Coverage + caches
+coverage/
+.nyc_output/
+.cache/
+.eslintcache
+.stylelintcache
+.turbo/
+
 # Playwright
 playwright-report/
 test-results/
 __pycache__/
-*.pyc
+*.pyc
+
+# Browser test screenshots
+tests/browser/__screenshots__/
+
+# Planning/proposal docs (not for commit)
+proposal/
+docs/http-adapter-error-handling-plan.md
+docs/project-notes.md
diff --git a/README.md b/README.md
@@ -91,6 +91,10 @@ The [`examples/`](https://github.com/modelcontextprotocol/ext-apps/tree/main/exa
 | [![Basic](examples/basic-server-react/grid-cell.png "Starter template")](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/basic-server-react) | The same app built with different frameworks — pick your favorite!<br><br>[React](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/basic-server-react) · [Vue](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/basic-server-vue) · [Svelte](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/basic-server-svelte) · [Preact](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/basic-server-preact) · [Solid](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/basic-server-solid) · [Vanilla JS](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/basic-server-vanillajs) |
 <!-- prettier-ignore-end -->
 
+Additional example:
+
+- [**Hono React Server**](https://github.com/modelcontextprotocol/ext-apps/tree/main/examples/hono-react-server) — Dual-mode HTTP pattern (Hono + React, type-safe `hc` client).
+
 ### Running the Examples
 
 #### With basic-host
@@ -414,6 +418,13 @@ Then configure your MCP client to build and run the local server. Replace `~/cod
         "cd ~/code/ext-apps/examples/customer-segmentation-server && npm run build >&2 && node dist/index.js --stdio"
       ]
     },
+    "hono-react": {
+      "command": "bash",
+      "args": [
+        "-c",
+        "cd ~/code/ext-apps/examples/hono-react-server && npm run build >&2 && node dist/main.js --stdio"
+      ]
+    },
     "map": {
       "command": "bash",
       "args": [

diff --git a/build.bun.ts b/build.bun.ts
@@ -26,6 +26,10 @@ function buildJs(
 }
 
 await Promise.all([
+  buildJs("src/generated/schema.ts", {
+    outdir: "dist/src/generated",
+    external: ["zod"],
+  }),
   buildJs("src/app.ts", {
     outdir: "dist/src",
     external: ["@modelcontextprotocol/sdk"],
@@ -51,4 +55,16 @@ await Promise.all([
     outdir: "dist/src/server",
     external: ["@modelcontextprotocol/sdk"],
   }),
+  buildJs("src/http-adapter/init.ts", {
+    outdir: "dist/src/http-adapter",
+    external: ["@modelcontextprotocol/sdk"],
+  }),
+  buildJs("src/http-adapter/fetch-wrapper/fetch.ts", {
+    outdir: "dist/src/http-adapter/fetch-wrapper",
+    external: ["@modelcontextprotocol/sdk"],
+  }),
+  buildJs("src/http-adapter/xhr-wrapper/xhr.ts", {
+    outdir: "dist/src/http-adapter/xhr-wrapper",
+    external: ["@modelcontextprotocol/sdk"],
+  }),
 ]);
diff --git a/examples/basic-host/README.md b/examples/basic-host/README.md
@@ -9,6 +9,7 @@ This basic host can also be used to test MCP Apps during local development.
 - [`index.html`](index.html) / [`src/index.tsx`](src/index.tsx) - React UI host with tool selection, parameter input, and iframe management
 - [`sandbox.html`](sandbox.html) / [`src/sandbox.ts`](src/sandbox.ts) - Outer iframe proxy with security validation and bidirectional message relay
 - [`src/implementation.ts`](src/implementation.ts) - Core logic: server connection, tool calling, and AppBridge setup
+- [`http-adapter-host.test.html`](http-adapter-host.test.html) / [`http-adapter-app.test.html`](http-adapter-app.test.html) - Test-only harness for HTTP adapter E2E coverage
 
 ## Getting Started
 

diff --git a/examples/basic-host/http-adapter-app.test.html b/examples/basic-host/http-adapter-app.test.html
@@ -0,0 +1,22 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>HTTP Adapter App</title>
+    <style>
+      body {
+        font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
+        margin: 16px;
+      }
+      #status {
+        font-size: 14px;
+        color: #333;
+      }
+    </style>
+  </head>
+  <body>
+    <div id="status">Booting HTTP adapter app…</div>
+    <script type="module" src="/src/http-adapter-app.ts"></script>
+  </body>
+</html>
diff --git a/examples/basic-host/http-adapter-host.test.html b/examples/basic-host/http-adapter-host.test.html
@@ -0,0 +1,30 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>HTTP Adapter Host Test</title>
+    <style>
+      body {
+        font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
+        margin: 16px;
+      }
+      #status {
+        font-size: 14px;
+        color: #333;
+        margin-bottom: 12px;
+      }
+      #app-frame {
+        width: 100%;
+        height: 240px;
+        border: 1px solid #ddd;
+        border-radius: 8px;
+      }
+    </style>
+  </head>
+  <body>
+    <div id="status">Booting HTTP adapter host…</div>
+    <iframe id="app-frame" title="HTTP Adapter App"></iframe>
+    <script type="module" src="/src/http-adapter-host.ts"></script>
+  </body>
+</html>
diff --git a/examples/basic-host/package.json b/examples/basic-host/package.json
@@ -4,8 +4,8 @@
   "version": "1.0.1",
   "type": "module",
   "scripts": {
-    "build": "tsc --noEmit && concurrently \"cross-env INPUT=index.html vite build\" \"cross-env INPUT=sandbox.html vite build\"",
-    "watch": "concurrently \"cross-env INPUT=index.html vite build --watch\" \"cross-env INPUT=sandbox.html vite build --watch\"",
+    "build": "tsc --noEmit && concurrently \"cross-env INPUT=index.html vite build\" \"cross-env INPUT=sandbox.html vite build\" \"cross-env INPUT=http-adapter-host.test.html vite build\" \"cross-env INPUT=http-adapter-app.test.html vite build\"",
+    "watch": "concurrently \"cross-env INPUT=index.html vite build --watch\" \"cross-env INPUT=sandbox.html vite build --watch\" \"cross-env INPUT=http-adapter-host.test.html vite build --watch\" \"cross-env INPUT=http-adapter-app.test.html vite build --watch\"",
     "serve": "bun --watch serve.ts",
     "start": "cross-env NODE_ENV=development npm run build && npm run serve",
     "dev": "cross-env NODE_ENV=development concurrently \"npm run watch\" \"npm run serve\""
@@ -26,6 +26,7 @@
     "concurrently": "^9.2.1",
     "cors": "^2.8.5",
     "express": "^5.1.0",
+    "msw": "^2.12.7",
     "prettier": "^3.6.2",
     "typescript": "^5.9.3",
     "vite": "^6.0.0",