diff --git a/.changeset/twelve-parrots-report.md b/.changeset/twelve-parrots-report.md
new file mode 100644
index 000000000000..6531e60b48c9
--- /dev/null
+++ b/.changeset/twelve-parrots-report.md
@@ -0,0 +1,5 @@
+---
+'@astrojs/vercel': patch
+---
+
+Add a Vercel adapter for SSR
diff --git a/.gitignore b/.gitignore
index 2185b7f84559..6a837da1d3ee 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 node_modules/
 dist/
+.output/
 *.tsbuildinfo
 .DS_Store
 .vercel
diff --git a/.prettierignore b/.prettierignore
index 7b6398b3e22d..7c89fbaf5aef 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -4,6 +4,7 @@
 
 # Deep Directories
 **/dist
+**/.output
 **/smoke
 **/node_modules
 **/fixtures
diff --git a/examples/blog-multiple-authors/.gitignore b/examples/blog-multiple-authors/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/blog-multiple-authors/.gitignore
+++ b/examples/blog-multiple-authors/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/examples/blog/.gitignore b/examples/blog/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/blog/.gitignore
+++ b/examples/blog/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/examples/component/.gitignore b/examples/component/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/component/.gitignore
+++ b/examples/component/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/examples/docs/.gitignore b/examples/docs/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/docs/.gitignore
+++ b/examples/docs/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/examples/env-vars/.gitignore b/examples/env-vars/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/env-vars/.gitignore
+++ b/examples/env-vars/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/examples/framework-alpine/.gitignore b/examples/framework-alpine/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/framework-alpine/.gitignore
+++ b/examples/framework-alpine/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/examples/framework-lit/.gitignore b/examples/framework-lit/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/framework-lit/.gitignore
+++ b/examples/framework-lit/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/examples/framework-multiple/.gitignore b/examples/framework-multiple/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/framework-multiple/.gitignore
+++ b/examples/framework-multiple/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/examples/framework-preact/.gitignore b/examples/framework-preact/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/framework-preact/.gitignore
+++ b/examples/framework-preact/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/examples/framework-react/.gitignore b/examples/framework-react/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/framework-react/.gitignore
+++ b/examples/framework-react/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/examples/framework-solid/.gitignore b/examples/framework-solid/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/framework-solid/.gitignore
+++ b/examples/framework-solid/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/examples/framework-svelte/.gitignore b/examples/framework-svelte/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/framework-svelte/.gitignore
+++ b/examples/framework-svelte/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/examples/framework-vue/.gitignore b/examples/framework-vue/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/framework-vue/.gitignore
+++ b/examples/framework-vue/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/examples/integrations-playground/.gitignore b/examples/integrations-playground/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/integrations-playground/.gitignore
+++ b/examples/integrations-playground/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/examples/minimal/.gitignore b/examples/minimal/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/minimal/.gitignore
+++ b/examples/minimal/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/examples/non-html-pages/.gitignore b/examples/non-html-pages/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/non-html-pages/.gitignore
+++ b/examples/non-html-pages/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/examples/portfolio/.gitignore b/examples/portfolio/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/portfolio/.gitignore
+++ b/examples/portfolio/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/examples/starter/.gitignore b/examples/starter/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/starter/.gitignore
+++ b/examples/starter/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/examples/subpath/.gitignore b/examples/subpath/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/subpath/.gitignore
+++ b/examples/subpath/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/examples/with-markdown-plugins/.gitignore b/examples/with-markdown-plugins/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/with-markdown-plugins/.gitignore
+++ b/examples/with-markdown-plugins/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/examples/with-markdown-shiki/.gitignore b/examples/with-markdown-shiki/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/with-markdown-shiki/.gitignore
+++ b/examples/with-markdown-shiki/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/examples/with-markdown/.gitignore b/examples/with-markdown/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/with-markdown/.gitignore
+++ b/examples/with-markdown/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/examples/with-nanostores/.gitignore b/examples/with-nanostores/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/with-nanostores/.gitignore
+++ b/examples/with-nanostores/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/examples/with-tailwindcss/.gitignore b/examples/with-tailwindcss/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/with-tailwindcss/.gitignore
+++ b/examples/with-tailwindcss/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/examples/with-vite-plugin-pwa/.gitignore b/examples/with-vite-plugin-pwa/.gitignore
index 7742642c1657..7329a851d0ac 100644
--- a/examples/with-vite-plugin-pwa/.gitignore
+++ b/examples/with-vite-plugin-pwa/.gitignore
@@ -1,5 +1,6 @@
 # build output
-dist
+dist/
+.output/
 
 # dependencies
 node_modules/
diff --git a/packages/astro/src/core/build/vite-plugin-ssr.ts b/packages/astro/src/core/build/vite-plugin-ssr.ts
index c0243f717501..93c53b99bc95 100644
--- a/packages/astro/src/core/build/vite-plugin-ssr.ts
+++ b/packages/astro/src/core/build/vite-plugin-ssr.ts
@@ -46,6 +46,7 @@ ${
 	adapter.exports
 		? `const _exports = adapter.createExports(_manifest, _args);
 ${adapter.exports.map((name) => `export const ${name} = _exports['${name}'];`).join('\n')}
+${adapter.exports.includes('_default') ? `export default _default` : ''}
 `
 		: ''
 }
diff --git a/packages/integrations/vercel/README.md b/packages/integrations/vercel/README.md
new file mode 100644
index 000000000000..7b8aae035f0a
--- /dev/null
+++ b/packages/integrations/vercel/README.md
@@ -0,0 +1,22 @@
+# @astrojs/vercel
+
+Deploy your server-side rendered (SSR) Astro app to [Vercel](https://www.vercel.com/).
+
+Use this integration in your Astro configuration file:
+
+```js
+import { defineConfig } from 'astro/config';
+import vercel from '@astrojs/vercel';
+
+export default defineConfig({
+	adapter: vercel()
+});
+```
+
+After you build your site the `.output/` folder will contain your server-side rendered app. Since this feature is still in beta, you'll **need to add this Enviroment Variable to your Vercel project**: `ENABLE_FILE_SYSTEM_API=1`
+
+Now you can deploy!
+
+```shell
+vercel
+```
diff --git a/packages/integrations/vercel/package.json b/packages/integrations/vercel/package.json
new file mode 100644
index 000000000000..229a48b8ec75
--- /dev/null
+++ b/packages/integrations/vercel/package.json
@@ -0,0 +1,33 @@
+{
+  "name": "@astrojs/vercel",
+  "description": "Deploy your site to Vercel",
+  "version": "0.0.1",
+  "type": "module",
+  "types": "./dist/index.d.ts",
+  "author": "withastro",
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/withastro/astro.git",
+    "directory": "packages/integrations/vercel"
+  },
+  "bugs": "https://github.com/withastro/astro/issues",
+  "homepage": "https://astro.build",
+  "exports": {
+    ".": "./dist/index.js",
+    "./server-entrypoint": "./dist/server-entrypoint.js",
+    "./package.json": "./package.json"
+  },
+  "scripts": {
+    "build": "astro-scripts build \"src/**/*.ts\" && tsc",
+    "dev": "astro-scripts dev \"src/**/*.ts\""
+  },
+  "dependencies": {
+    "@astrojs/webapi": "^0.11.0",
+    "esbuild": "0.14.25"
+  },
+  "devDependencies": {
+    "astro": "workspace:*",
+    "astro-scripts": "workspace:*"
+  }
+}
diff --git a/packages/integrations/vercel/src/index.ts b/packages/integrations/vercel/src/index.ts
new file mode 100644
index 000000000000..49a924b2d763
--- /dev/null
+++ b/packages/integrations/vercel/src/index.ts
@@ -0,0 +1,66 @@
+import type { AstroAdapter, AstroConfig, AstroIntegration } from 'astro';
+import type { PathLike } from 'fs';
+import fs from 'fs/promises';
+import esbuild from 'esbuild';
+import { fileURLToPath } from 'url';
+
+const writeJson = (path: PathLike, data: any) =>
+	fs.writeFile(path, JSON.stringify(data), { encoding: 'utf-8' });
+
+const ENTRYFILE = '__astro_entry';
+
+export function getAdapter(): AstroAdapter {
+	return {
+		name: '@astrojs/vercel',
+		serverEntrypoint: '@astrojs/vercel/server-entrypoint',
+		exports: ['_default'],
+	};
+}
+
+export default function vercel(): AstroIntegration {
+	let _config: AstroConfig;
+	return {
+		name: '@astrojs/vercel',
+		hooks: {
+			'astro:config:setup': ({ config }) => {
+				config.outDir = new URL('./.output/', config.outDir);
+				config.build.format = 'directory';
+			},
+			'astro:config:done': ({ setAdapter, config }) => {
+				setAdapter(getAdapter());
+				_config = config;
+			},
+			'astro:build:start': async ({ buildConfig }) => {
+				buildConfig.serverEntry = `${ENTRYFILE}.mjs`;
+				buildConfig.client = new URL('./static/', _config.outDir);
+				buildConfig.server = new URL('./server/pages/', _config.outDir);
+			},
+			'astro:build:done': async ({ dir, routes }) => {
+				const pagesDir = new URL('./server/pages/', dir);
+
+				// Convert server entry to CommonJS
+				await esbuild.build({
+					entryPoints: [fileURLToPath(new URL(`./${ENTRYFILE}.mjs`, pagesDir))],
+					outfile: fileURLToPath(new URL(`./${ENTRYFILE}.js`, pagesDir)),
+					bundle: true,
+					format: 'cjs',
+					platform: 'node',
+					target: 'node14',
+				});
+				await fs.rm(new URL(`./${ENTRYFILE}.mjs`, pagesDir));
+
+				// Routes Manifest
+				// https://vercel.com/docs/file-system-api#configuration/routes
+				await writeJson(new URL(`./routes-manifest.json`, dir), {
+					version: 3,
+					basePath: '/',
+					pages404: false,
+					rewrites: routes.map((route) => ({
+						source: route.pathname,
+						destination: `/${ENTRYFILE}`,
+					})),
+				});
+			},
+		},
+	};
+}
diff --git a/packages/integrations/vercel/src/request-transform.ts b/packages/integrations/vercel/src/request-transform.ts
new file mode 100644
index 000000000000..0a87ca6427dc
--- /dev/null
+++ b/packages/integrations/vercel/src/request-transform.ts
@@ -0,0 +1,95 @@
+import { Readable } from 'stream';
+import type { IncomingMessage, ServerResponse } from 'http';
+
+/*
+  Credits to the SvelteKit team
+	https://github.com/sveltejs/kit/blob/69913e9fda054fa6a62a80e2bb4ee7dca1005796/packages/kit/src/node.js
+*/
+
+function get_raw_body(req: IncomingMessage) {
+	return new Promise<Uint8Array | null>((fulfil, reject) => {
+		const h = req.headers;
+
+		if (!h['content-type']) {
+			return fulfil(null);
+		}
+
+		req.on('error', reject);
+
+		const length = Number(h['content-length']);
+
+		// https://github.com/jshttp/type-is/blob/c1f4388c71c8a01f79934e68f630ca4a15fffcd6/index.js#L81-L95
+		if (isNaN(length) && h['transfer-encoding'] == null) {
+			return fulfil(null);
+		}
+
+		let data = new Uint8Array(length || 0);
+
+		if (length > 0) {
+			let offset = 0;
+			req.on('data', (chunk) => {
+				const new_len = offset + Buffer.byteLength(chunk);
+
+				if (new_len > length) {
+					return reject({
+						status: 413,
+						reason: 'Exceeded "Content-Length" limit',
+					});
+				}
+
+				data.set(chunk, offset);
+				offset = new_len;
+			});
+		} else {
+			req.on('data', (chunk) => {
+				const new_data = new Uint8Array(data.length + chunk.length);
+				new_data.set(data, 0);
+				new_data.set(chunk, data.length);
+				data = new_data;
+			});
+		}
+
+		req.on('end', () => {
+			fulfil(data);
+		});
+	});
+}
+
+export async function getRequest(base: string, req: IncomingMessage): Promise<Request> {
+	let headers = req.headers as Record<string, string>;
+	if (req.httpVersionMajor === 2) {
+		// we need to strip out the HTTP/2 pseudo-headers because node-fetch's
+		// Request implementation doesn't like them
+		headers = Object.assign({}, headers);
+		delete headers[':method'];
+		delete headers[':path'];
+		delete headers[':authority'];
+		delete headers[':scheme'];
+	}
+	return new Request(base + req.url, {
+		method: req.method,
+		headers,
+		body: await get_raw_body(req), // TODO stream rather than buffer
+	});
+}
+
+export async function setResponse(res: ServerResponse, response: Response): Promise<void> {
+	const headers = Object.fromEntries(response.headers);
+
+	if (response.headers.has('set-cookie')) {
+		// @ts-expect-error (headers.raw() is non-standard)
+		headers['set-cookie'] = response.headers.raw()['set-cookie'];
+	}
+
+	res.writeHead(response.status, headers);
+
+	if (response.body instanceof Readable) {
+		response.body.pipe(res);
+	} else {
+		if (response.body) {
+			res.write(await response.arrayBuffer());
+		}
+
+		res.end();
+	}
+}
diff --git a/packages/integrations/vercel/src/server-entrypoint.ts b/packages/integrations/vercel/src/server-entrypoint.ts
new file mode 100644
index 000000000000..df01fe32a3dc
--- /dev/null
+++ b/packages/integrations/vercel/src/server-entrypoint.ts
@@ -0,0 +1,34 @@
+import type { SSRManifest } from 'astro';
+import { App } from 'astro/app';
+import { polyfill } from '@astrojs/webapi';
+import type { IncomingMessage, ServerResponse } from 'http';
+
+import { getRequest, setResponse } from './request-transform.js';
+
+polyfill(globalThis, {
+	exclude: 'window document',
+});
+
+export const createExports = (manifest: SSRManifest) => {
+	const app = new App(manifest);
+
+	const _default = async (req: IncomingMessage, res: ServerResponse) => {
+		let request: Request;
+
+		try {
+			request = await getRequest(`https://${req.headers.host}`, req);
+		} catch (err: any) {
+			res.statusCode = err.status || 400;
+			return res.end(err.reason || 'Invalid request body');
+		}
+
+		if (!app.match(request)) {
+			res.statusCode = 404;
+			return res.end('Not found');
+		}
+
+		await setResponse(res, await app.render(request));
+	};
+
+	return { _default };
+};
diff --git a/packages/integrations/vercel/tsconfig.json b/packages/integrations/vercel/tsconfig.json
new file mode 100644
index 000000000000..44baf375c882
--- /dev/null
+++ b/packages/integrations/vercel/tsconfig.json
@@ -0,0 +1,10 @@
+{
+  "extends": "../../../tsconfig.base.json",
+  "include": ["src"],
+  "compilerOptions": {
+    "allowJs": true,
+    "module": "ES2020",
+    "outDir": "./dist",
+    "target": "ES2020"
+  }
+}
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index e367fbf9a14a..4bffb8598eb5 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -1369,6 +1369,19 @@ importers:
       astro: link:../../astro
       astro-scripts: link:../../../scripts
 
+  packages/integrations/vercel:
+    specifiers:
+      '@astrojs/webapi': ^0.11.0
+      astro: workspace:*
+      astro-scripts: workspace:*
+      esbuild: 0.14.25
+    dependencies:
+      '@astrojs/webapi': link:../../webapi
+      esbuild: 0.14.25
+    devDependencies:
+      astro: link:../../astro
+      astro-scripts: link:../../../scripts
+
   packages/integrations/vue:
     specifiers:
       '@vitejs/plugin-vue': ^2.3.1