diff --git a/.changeset/blue-cloths-create.md b/.changeset/blue-cloths-create.md
new file mode 100644
index 00000000000..1fbc195cee1
--- /dev/null
+++ b/.changeset/blue-cloths-create.md
@@ -0,0 +1,5 @@
+---
+'@clerk/clerk-js': minor
+---
+
+[Experimental] Add support for captcha to Signal SignUp
diff --git a/packages/clerk-js/src/core/resources/SignUp.ts b/packages/clerk-js/src/core/resources/SignUp.ts
index 3f1f5626129..8f9aee5b12e 100644
--- a/packages/clerk-js/src/core/resources/SignUp.ts
+++ b/packages/clerk-js/src/core/resources/SignUp.ts
@@ -8,6 +8,7 @@ import type {
   AuthenticateWithPopupParams,
   AuthenticateWithRedirectParams,
   AuthenticateWithWeb3Params,
+  CaptchaWidgetType,
   CreateEmailLinkFlowReturn,
   PrepareEmailAddressVerificationParams,
   PreparePhoneNumberVerificationParams,
@@ -487,11 +488,35 @@ class SignUpFuture implements SignUpFutureResource {
     return this.resource.unverifiedFields;
   }
 
+  private async getCaptchaToken(): Promise<{
+    captchaToken?: string;
+    captchaWidgetType?: CaptchaWidgetType;
+    captchaError?: unknown;
+  }> {
+    const captchaChallenge = new CaptchaChallenge(SignUp.clerk);
+    const response = await captchaChallenge.managedOrInvisible({ action: 'signup' });
+    if (!response) {
+      throw new Error('Captcha challenge failed');
+    }
+
+    const { captchaError, captchaToken, captchaWidgetType } = response;
+    return { captchaToken, captchaWidgetType, captchaError };
+  }
+
   async password({ emailAddress, password }: { emailAddress: string; password: string }): Promise<{ error: unknown }> {
     return runAsyncResourceTask(this.resource, async () => {
+      const { captchaToken, captchaWidgetType, captchaError } = await this.getCaptchaToken();
+
       await this.resource.__internal_basePost({
         path: this.resource.pathRoot,
-        body: { emailAddress, password },
+        body: {
+          strategy: 'password',
+          emailAddress,
+          password,
+          captchaToken,
+          captchaWidgetType,
+          captchaError,
+        },
       });
     });
   }
diff --git a/packages/clerk-js/src/utils/captcha/CaptchaChallenge.ts b/packages/clerk-js/src/utils/captcha/CaptchaChallenge.ts
index f7b81bb0f6a..27cf632bc84 100644
--- a/packages/clerk-js/src/utils/captcha/CaptchaChallenge.ts
+++ b/packages/clerk-js/src/utils/captcha/CaptchaChallenge.ts
@@ -1,3 +1,5 @@
+import type { CaptchaWidgetType } from '@clerk/types';
+
 import type { Clerk } from '../../core/resources/internal';
 import { getCaptchaToken } from './getCaptchaToken';
 import { retrieveCaptchaInfo } from './retrieveCaptchaInfo';
@@ -42,7 +44,12 @@ export class CaptchaChallenge {
    *
    * Managed challenged start as non-interactive and escalate to interactive if necessary.
    */
-  public async managedOrInvisible(opts?: Partial<CaptchaOptions>) {
+  public async managedOrInvisible(
+    opts?: Partial<CaptchaOptions>,
+  ): Promise<
+    | { captchaError?: string; captchaAction?: string; captchaToken?: string; captchaWidgetType?: CaptchaWidgetType }
+    | undefined
+  > {
     const { captchaSiteKey, canUseCaptcha, captchaWidgetType, captchaProvider, captchaPublicKeyInvisible, nonce } =
       retrieveCaptchaInfo(this.clerk);