diff --git a/.changeset/hungry-dryers-hear.md b/.changeset/hungry-dryers-hear.md
new file mode 100644
index 000000000..8e645afac
--- /dev/null
+++ b/.changeset/hungry-dryers-hear.md
@@ -0,0 +1,6 @@
+---
+'@spotlightjs/overlay': patch
+'@spotlightjs/astro': patch
+---
+
+feat(core): Add support for custom sidecar URL in client Sentry integration
diff --git a/.changeset/lucky-fireants-whisper.md b/.changeset/lucky-fireants-whisper.md
new file mode 100644
index 000000000..7ced6d170
--- /dev/null
+++ b/.changeset/lucky-fireants-whisper.md
@@ -0,0 +1,5 @@
+---
+'@spotlightjs/astro': patch
+---
+
+feat(astro): Add custom `sidecarUrl` option
diff --git a/packages/astro/src/index.ts b/packages/astro/src/index.ts
index 2016744ba..540ddaf24 100644
--- a/packages/astro/src/index.ts
+++ b/packages/astro/src/index.ts
@@ -1,21 +1,15 @@
 import type { AstroIntegration } from 'astro';
-import { SPOTLIGHT_SERVER_SNIPPET, buildClientInitSnippet, type ClientInitOptions } from './snippets';
+import { buildClientInitSnippet, buildServerSnippet } from './snippets';
 
 import path from 'path';
 import url from 'url';
 
+import type { SpotlightAstroIntegrationOptions } from './types';
 import { errorPageInjectionPlugin } from './vite/error-page';
 
 const PKG_NAME = '@spotlightjs/astro';
 
-export type SpotlightOptions =
-  | {
-      __debugOptions?: ClientInitOptions;
-      debug: boolean;
-    }
-  | undefined;
-
-const createPlugin = (options?: SpotlightOptions): AstroIntegration => {
+const createPlugin = (options?: SpotlightAstroIntegrationOptions): AstroIntegration => {
   const thisFilePath = url.fileURLToPath(import.meta.url);
 
   return {
@@ -51,17 +45,22 @@ const createPlugin = (options?: SpotlightOptions): AstroIntegration => {
           }
 
           injectScript('page', buildClientInitSnippet({ importPath: PKG_NAME, showTriggerButton, ...options }));
-          injectScript('page-ssr', SPOTLIGHT_SERVER_SNIPPET);
+          injectScript('page-ssr', buildServerSnippet(options));
 
           const importPath = path.dirname(url.fileURLToPath(import.meta.url));
           const pluginPath = path.join(importPath, 'overlay/index.ts');
           addDevOverlayPlugin(pluginPath);
         } else if (options?.__debugOptions) {
-          injectScript('page', buildClientInitSnippet(options.__debugOptions));
+          injectScript('page', buildClientInitSnippet({ importPath: PKG_NAME, ...options }));
         }
       },
 
       'astro:server:start': async () => {
+        if (options?.sidecarUrl) {
+          // If users set a custom sidecar URL, we assume they started the sidecar manually outside of Astro.
+          // So we don't setup the default sidecar instance.
+          return;
+        }
         // Importing this dynamically because for some reason, the top level import
         // caused a dev server error because the sidecar code was bundled into the server
         const { setupSidecar } = await import('@spotlightjs/sidecar');
diff --git a/packages/astro/src/snippets.ts b/packages/astro/src/snippets.ts
index f8fa1cbb2..fef21baeb 100644
--- a/packages/astro/src/snippets.ts
+++ b/packages/astro/src/snippets.ts
@@ -1,3 +1,5 @@
+import type { SpotlightAstroIntegrationOptions } from './types';
+
 type SupportedIntegrations = 'sentry' | 'console' | 'viteInspect';
 
 export type ClientInitOptions = {
@@ -5,15 +7,15 @@ export type ClientInitOptions = {
   showTriggerButton?: boolean;
   integrationNames?: SupportedIntegrations[];
   injectImmediately?: boolean;
-};
-
-const DEFAULT_INTEGRATIONS = ['sentry'];
+} & SpotlightAstroIntegrationOptions;
 
 const buildClientImport = (importPath: string) => `import * as Spotlight from '${importPath}';`;
 
 const buildClientInit = (options: ClientInitOptions) => {
-  const integrations = options.integrationNames || DEFAULT_INTEGRATIONS;
-  const integrationCalls = integrations.map(i => `Spotlight.${i}()`).join(', ');
+  const integrationCalls = options.integrationNames
+    ? options.integrationNames.map(i => `Spotlight.${i}()`).join(', ')
+    : `Spotlight.sentry({sidecarUrl: ${options.sidecarUrl ? `'${options.sidecarUrl}'` : undefined}})`;
+
   return `
 Spotlight.init({
   integrations: [
@@ -22,6 +24,7 @@ Spotlight.init({
   showTriggerButton: ${options.showTriggerButton === false ? 'false' : 'true'},
   injectImmediately: ${options.injectImmediately === true ? 'true' : 'false'},
   debug: ${options.debug === true ? 'true' : 'false'},
+  ${options.sidecarUrl ? `sidecar: '${options.sidecarUrl}'` : ''}
 });
 `;
 };
@@ -58,8 +61,11 @@ if (enableOverlay) {
 }
 `;
 
-export const SPOTLIGHT_SERVER_SNIPPET = `
+export const buildServerSnippet: (options: SpotlightAstroIntegrationOptions) => string = options => `
 import * as _SentrySDKForSpotlight from '@sentry/astro';
+
 _SentrySDKForSpotlight.getClient().setupIntegrations(true);
-_SentrySDKForSpotlight.addIntegration(new _SentrySDKForSpotlight.Integrations.Spotlight());
+_SentrySDKForSpotlight.addIntegration(new _SentrySDKForSpotlight.Integrations.Spotlight({
+  ${options?.sidecarUrl ? `sidecarUrl: '${options.sidecarUrl}'` : ''}
+}));
 `;
diff --git a/packages/astro/src/types.ts b/packages/astro/src/types.ts
new file mode 100644
index 000000000..b718ff7ea
--- /dev/null
+++ b/packages/astro/src/types.ts
@@ -0,0 +1,25 @@
+export type SpotlightAstroIntegrationOptions =
+  | {
+      /**
+       * Set this URL if you're running the Spotlight sidecar on a custom URL.
+       * Setting this URL will cause server- and client-side events to be forwarded to the sidcar running on the passed URL.
+       *
+       * IMPORTANT: This option assumes that you manually started the sidecar outside of Astro. Therefore, if it is set,
+       * the spotlight Astro integration will not start its own sidecar.
+       *
+       * @default 'http://localhost:8969/stream'
+       */
+      sidecarUrl?: string;
+
+      /**
+       * If enabled, Spotlight will log additional debug output to the console.
+       */
+      debug?: boolean;
+
+      /**
+       * Additional debug options.
+       * WARNING: These options are not part of the public API and may change at any time.
+       */
+      __debugOptions?: Record<string, unknown>;
+    }
+  | undefined;
diff --git a/packages/astro/src/vite/error-page.ts b/packages/astro/src/vite/error-page.ts
index 77abc57bc..6a4fc51cb 100644
--- a/packages/astro/src/vite/error-page.ts
+++ b/packages/astro/src/vite/error-page.ts
@@ -1,12 +1,13 @@
 import { buildSpotlightErrorPageSnippet } from '../snippets';
 
 import type { Plugin } from 'vite';
+import type { SpotlightAstroIntegrationOptions } from '../types';
 
 type ErrorPagePluginOptions = {
   importPath: string;
-};
+} & SpotlightAstroIntegrationOptions;
 
-export const errorPageInjectionPlugin: (options: ErrorPagePluginOptions) => Plugin = ({ importPath }) => {
+export const errorPageInjectionPlugin: (options: ErrorPagePluginOptions) => Plugin = options => {
   return {
     name: 'spotlight-vite-client-snippet-plugin',
     transform(code, id, opts = {}) {
@@ -14,7 +15,7 @@ export const errorPageInjectionPlugin: (options: ErrorPagePluginOptions) => Plug
       if (!id.includes('vite/dist/client/client.mjs')) return;
 
       const initSnippet = buildSpotlightErrorPageSnippet({
-        importPath,
+        ...options,
         // Astro's toolbar isn't available in the error page
         showTriggerButton: true,
         // don't wait for the window.load event to be fired because in the error page,
diff --git a/packages/overlay/src/index.tsx b/packages/overlay/src/index.tsx
index 463e301ef..e87af4c92 100644
--- a/packages/overlay/src/index.tsx
+++ b/packages/overlay/src/index.tsx
@@ -48,12 +48,12 @@ const DEFAULT_SIDECAR = 'http://localhost:8969/stream';
 export async function init({
   fullScreen = false,
   showTriggerButton = true,
-  integrations = [sentry()],
   defaultEventId,
   injectImmediately = false,
   sidecar = DEFAULT_SIDECAR,
   anchor = DEFAULT_ANCHOR,
   debug = false,
+  integrations,
 }: {
   integrations?: Integration[];
   fullScreen?: boolean;
@@ -77,7 +77,11 @@ export async function init({
   if (debug) {
     activateLogger();
   }
-  const initializedIntegrations = await initIntegrations(integrations);
+
+  // Sentry is enabled by default
+  const defaultInitegrations = [sentry({ sidecarUrl: sidecar })];
+
+  const initializedIntegrations = await initIntegrations(integrations ?? defaultInitegrations);
 
   // build shadow dom container to contain styles
   const docRoot = document.createElement('div');
diff --git a/packages/overlay/src/integrations/sentry/index.ts b/packages/overlay/src/integrations/sentry/index.ts
index 70fc47119..76543e9b8 100644
--- a/packages/overlay/src/integrations/sentry/index.ts
+++ b/packages/overlay/src/integrations/sentry/index.ts
@@ -10,13 +10,17 @@ import TracesTab from './tabs/TracesTab';
 
 const HEADER = 'application/x-sentry-envelope';
 
-export default function sentryIntegration() {
+type SentryIntegrationOptions = {
+  sidecarUrl?: string;
+};
+
+export default function sentryIntegration(options?: SentryIntegrationOptions) {
   return {
     name: 'sentry',
     forwardedContentType: [HEADER],
 
     setup: () => {
-      addSpotlightIntegrationToSentry();
+      addSpotlightIntegrationToSentry(options);
     },
 
     processEvent: (event: RawEventContext) => processEnvelope(event),
@@ -89,12 +93,15 @@ function isErrorEnvelope(envelope: Envelope) {
   return envelope[1].some(([itemHeader]) => itemHeader.type === 'event');
 }
 
-function addSpotlightIntegrationToSentry() {
+function addSpotlightIntegrationToSentry(options?: SentryIntegrationOptions) {
   // A very hacky way to hook into Sentry's SDK
   // but we love hacks
   const sentryHub = (window as WindowWithSentry).__SENTRY__?.hub;
   const sentryClient = sentryHub?.getClient();
   if (sentryClient) {
-    sentryClient.addIntegration(new Spotlight());
+    const spotlightIntegration = new Spotlight({
+      sidecarUrl: options?.sidecarUrl,
+    });
+    sentryClient.addIntegration(spotlightIntegration);
   }
 }
diff --git a/packages/overlay/src/integrations/sentry/sentry-integration.ts b/packages/overlay/src/integrations/sentry/sentry-integration.ts
index 297d70c33..85a4f63ed 100644
--- a/packages/overlay/src/integrations/sentry/sentry-integration.ts
+++ b/packages/overlay/src/integrations/sentry/sentry-integration.ts
@@ -1,9 +1,25 @@
 import { Client, Envelope, Event, EventProcessor, Hub, Integration } from '@sentry/types';
 import { serializeEnvelope } from '@sentry/utils';
 
+type SpotlightBrowserIntegationOptions = {
+  /**
+   * The URL of the Sidecar instance to connect and forward events to.
+   * If not set, Spotlight will try to connect to the Sidecar running on localhost:8969.
+   *
+   * @default "http://localhost:8969/stream"
+   */
+  sidecarUrl?: string;
+};
 export class Spotlight implements Integration {
   public name: string = 'DevServerContextLines';
 
+  private _sidecarUrl: string;
+
+  public constructor(options?: SpotlightBrowserIntegationOptions) {
+    this._sidecarUrl = options?.sidecarUrl ?? 'http://localhost:8969/stream';
+    console.log('Spotlight: Using Sidecar URL', this._sidecarUrl);
+  }
+
   public setupOnce(addGlobalEventProcessor: (callback: EventProcessor) => void, getCurrentHub: () => Hub): void {
     addGlobalEventProcessor(async (event: Event) => {
       if (event.type || !event.exception || !event.exception.values) {
@@ -32,18 +48,18 @@ export class Spotlight implements Integration {
 
     const client = getCurrentHub().getClient();
     if (client) {
-      sendEnvelopesToSidecar(client);
+      sendEnvelopesToSidecar(client, this._sidecarUrl);
     }
   }
 }
 
-function sendEnvelopesToSidecar(client: Client) {
+function sendEnvelopesToSidecar(client: Client, sidecarUrl: string) {
   // Ensure, integrations are initialized even if no DSN was set
   client?.setupIntegrations(true);
 
   if (client.on) {
     client?.on('beforeEnvelope', (envelope: Envelope) => {
-      fetch('http://localhost:8969/stream', {
+      fetch(sidecarUrl, {
         method: 'POST',
         body: serializeEnvelope(envelope),
         headers: {