diff --git a/packages/astro/package.json b/packages/astro/package.json
index 429ed9ee587b..3daa7ef225fc 100644
--- a/packages/astro/package.json
+++ b/packages/astro/package.json
@@ -40,6 +40,12 @@
       "import": "./build/esm/integration/middleware/index.js",
       "require": "./build/cjs/integration/middleware/index.js",
       "types": "./build/types/integration/middleware/index.types.d.ts"
+    },
+    "./tunnel": {
+      "node": "./build/esm/integration/tunnel.js",
+      "import": "./build/esm/integration/tunnel.js",
+      "require": "./build/cjs/integration/tunnel.js",
+      "types": "./build/types/integration/tunnel.types.d.ts"
     }
   },
   "publishConfig": {
diff --git a/packages/astro/src/integration/index.ts b/packages/astro/src/integration/index.ts
index 15e48cb49f12..7b9128548737 100644
--- a/packages/astro/src/integration/index.ts
+++ b/packages/astro/src/integration/index.ts
@@ -13,7 +13,15 @@ export const sentryAstro = (options: SentryOptions = {}): AstroIntegration => {
     name: PKG_NAME,
     hooks: {
       // eslint-disable-next-line complexity
-      'astro:config:setup': async ({ updateConfig, injectScript, addMiddleware, config, command, logger }) => {
+      'astro:config:setup': async ({
+        updateConfig,
+        injectScript,
+        addMiddleware,
+        config,
+        command,
+        logger,
+        injectRoute,
+      }) => {
         // The third param here enables loading of all env vars, regardless of prefix
         // see: https://main.vitejs.dev/config/#using-environment-variables-in-config
 
@@ -111,6 +119,19 @@ export const sentryAstro = (options: SentryOptions = {}): AstroIntegration => {
             entrypoint: '@sentry/astro/middleware',
           });
         }
+
+        if (options.tunnelRoute) {
+          if (options.tunnelRoute.projectIds.length === 0) {
+            throw new Error(
+              'When using the `tunnelRoute` configuration, you need to provide at least one project Id in `projectIds`',
+            );
+          }
+
+          injectRoute({
+            pattern: options.tunnelRoute.pattern,
+            entryPoint: '@sentry/astro/tunnel',
+          });
+        }
       },
     },
   };
diff --git a/packages/astro/src/integration/tunnel.ts b/packages/astro/src/integration/tunnel.ts
new file mode 100644
index 000000000000..210bfd505074
--- /dev/null
+++ b/packages/astro/src/integration/tunnel.ts
@@ -0,0 +1,39 @@
+import type { APIRoute } from 'astro';
+import { config } from 'virtual:@sentry/astro/tunnel-config';
+
+export const prerender = false;
+
+export const POST: APIRoute = async ({ request }) => {
+  try {
+    const envelope = await request.text();
+    const piece = envelope.split('\n')[0];
+    const header = JSON.parse(piece);
+
+    const dsn = new URL(header.dsn);
+    if (dsn.hostname !== config.host) {
+      throw new Error(`Invalid Sentry host: ${dsn.hostname}`);
+    }
+
+    const projectId = dsn.pathname.substring(1);
+    if (!config.projectIds.includes(projectId)) {
+      throw new Error(`Invalid Project ID: ${projectId}`);
+    }
+
+    const url = `https://${config.host}/api/${projectId}/envelope/`;
+    const res = await fetch(url, {
+      method: 'POST',
+      body: envelope,
+      headers: {
+        'Content-Type': 'application/x-sentry-envelope',
+      },
+    });
+
+    if (!res.ok) {
+      throw new Error(await res.text());
+    }
+
+    return Response(null, { status: 204 });
+  } catch (error) {
+    return Response.json({ message: (error as Error).message }, { status: 400 });
+  }
+};
diff --git a/packages/astro/src/integration/types.ts b/packages/astro/src/integration/types.ts
index 6f182427ee47..17de741d5d8c 100644
--- a/packages/astro/src/integration/types.ts
+++ b/packages/astro/src/integration/types.ts
@@ -126,6 +126,33 @@ type SdkEnabledOptions = {
       };
 };
 
+type SdkTunnelOptions = {
+  /**
+   * Options for tunneling.
+   */
+  tunnelRoute?: {
+    /**
+     * Where the route should be output in the browser, for example `/api/sy`. It's recommended
+     * not to put terms related to Sentry or tracking as they can be flagged and blocked by
+     * ad-blockers.
+     *
+     * @see https://docs.astro.build/en/reference/integrations-reference/#injectroute-option
+     */
+    pattern: string;
+    /**
+     * The project slug of your Sentry project.
+     *
+     * @default "sentry.io"
+     */
+    host?: string;
+    /**
+     * Restricts to what project your tunnel can forward Sentry events to. There should be at least
+     * one project id.
+     */
+    projectIds: Array<string>;
+  };
+};
+
 /**
  * A subset of Sentry SDK options that can be set via the `sentryAstro` integration.
  * Some options (e.g. integrations) are set by default and cannot be changed here.
@@ -140,4 +167,5 @@ export type SentryOptions = SdkInitPaths &
   Pick<BrowserOptions, 'replaysSessionSampleRate' | 'replaysOnErrorSampleRate'> &
   SourceMapsOptions &
   InstrumentationOptions &
-  SdkEnabledOptions;
+  SdkEnabledOptions &
+  SdkTunnelOptions;
diff --git a/packages/astro/src/integration/virtual-imports.ts b/packages/astro/src/integration/virtual-imports.ts
new file mode 100644
index 000000000000..3d512977a525
--- /dev/null
+++ b/packages/astro/src/integration/virtual-imports.ts
@@ -0,0 +1,30 @@
+import type { Plugin } from 'vite';
+import type { SentryOptions } from './types';
+
+function resolveVirtualModuleId<T extends string>(id: T): `\0${T}` {
+  return `\0${id}`;
+}
+
+export type VirtualImportsParams = Pick<Required<SentryOptions>['tunnelRoute'], 'host' | 'projectIds'>;
+
+export const virtualImportsPlugin = ({ host = 'sentry.io', projectIds }: VirtualImportsParams): Plugin => {
+  const modules: Record<string, string> = {
+    'virtual:@sentry/astro/tunnel-config': `export const config = ${JSON.stringify({ host, projectIds })}`,
+  };
+
+  /** Mapping names prefixed with `\0` to their original form. */
+  const resolutionMap = Object.fromEntries(
+    (Object.keys(modules) as (keyof typeof modules)[]).map(key => [resolveVirtualModuleId(key), key]),
+  );
+
+  return {
+    name: '@sentry/astro/virtual',
+    resolveId(id) {
+      if (id in modules) return resolveVirtualModuleId(id);
+    },
+    load(id) {
+      const resolution = resolutionMap[id];
+      if (resolution) return modules[resolution];
+    },
+  };
+};
diff --git a/packages/astro/src/integration/virtual.d.ts b/packages/astro/src/integration/virtual.d.ts
new file mode 100644
index 000000000000..3a76435c2993
--- /dev/null
+++ b/packages/astro/src/integration/virtual.d.ts
@@ -0,0 +1,3 @@
+declare module 'virtual:@sentry/astro/tunnel-config' {
+  export const config: import('./tunnel').VirtualImportsParams;
+}
diff --git a/packages/astro/tsconfig.json b/packages/astro/tsconfig.json
index bf45a09f2d71..7e1fe0e7f721 100644
--- a/packages/astro/tsconfig.json
+++ b/packages/astro/tsconfig.json
@@ -4,6 +4,7 @@
   "include": ["src/**/*"],
 
   "compilerOptions": {
+    "lib": ["ES2019"]
     // package-specific options
   }
 }