diff --git a/havre/test/http.test.js b/havre/test/http.test.js
new file mode 100644
index 0000000..1100609
--- /dev/null
+++ b/havre/test/http.test.js
@@ -0,0 +1,22 @@
+import { test } from "node:test";
+import assert from "node:assert/strict";
+import { Client } from "@modelcontextprotocol/sdk/client/index.js";
+import { StreamableHTTPClientTransport } from "@modelcontextprotocol/sdk/client/streamableHttp.js";
+import { createHttpServer } from "../src/http.js";
+
+test("health check and MCP over streamable HTTP", async () => {
+  const http = createHttpServer().listen(0);
+  await new Promise((r) => http.once("listening", r));
+  const base = `http://127.0.0.1:${http.address().port}`;
+  const client = new Client({ name: "test", version: "0.0.0" });
+  try {
+    assert.equal((await fetch(`${base}/health`)).status, 200);
+    assert.equal((await fetch(`${base}/nope`)).status, 404);
+    await client.connect(new StreamableHTTPClientTransport(new URL(`${base}/mcp`)));
+    assert.equal(client.getServerVersion().name, "havre");
+    assert.equal((await client.callTool({ name: "havre_ping", arguments: { message: "hi" } })).content[0].text, "hi");
+  } finally {
+    await client.close();
+    http.close();
+  }
+});