diff --git a/src/main/java/cc/pulseapp/api/controller/v1/UserController.java b/src/main/java/cc/pulseapp/api/controller/v1/UserController.java
index 5d35e9a..48a4434 100644
--- a/src/main/java/cc/pulseapp/api/controller/v1/UserController.java
+++ b/src/main/java/cc/pulseapp/api/controller/v1/UserController.java
@@ -5,6 +5,7 @@ import cc.pulseapp.api.model.user.User;
 import cc.pulseapp.api.model.user.UserDTO;
 import cc.pulseapp.api.model.user.input.CompleteOnboardingInput;
 import cc.pulseapp.api.model.user.input.EnableTFAInput;
+import cc.pulseapp.api.model.user.input.UserExistsInput;
 import cc.pulseapp.api.model.user.response.UserSetupTFAResponse;
 import cc.pulseapp.api.service.UserService;
 import lombok.NonNull;
@@ -50,12 +51,12 @@ public final class UserController {
      * A GET endpoint to check if a
      * user exists with the given email.
      *
-     * @param email the email to check
+     * @param input the input to check
      * @return the response
      */
-    @GetMapping("/exists") @ResponseBody @NonNull
-    public ResponseEntity<Map<String, Object>> doesUserExist(@RequestParam @NonNull String email) {
-        return ResponseEntity.ok(Map.of("exists", userService.doesUserExist(email)));
+    @PostMapping("/exists") @ResponseBody @NonNull
+    public ResponseEntity<Map<String, Object>> doesUserExist(UserExistsInput input) {
+        return ResponseEntity.ok(Map.of("exists", userService.doesUserExist(input)));
     }
 
     /**
diff --git a/src/main/java/cc/pulseapp/api/model/user/input/UserExistsInput.java b/src/main/java/cc/pulseapp/api/model/user/input/UserExistsInput.java
new file mode 100644
index 0000000..306d5a6
--- /dev/null
+++ b/src/main/java/cc/pulseapp/api/model/user/input/UserExistsInput.java
@@ -0,0 +1,35 @@
+package cc.pulseapp.api.model.user.input;
+
+import cc.pulseapp.api.model.user.User;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.ToString;
+
+/**
+ * The input to check if
+ * a {@link User} exists.
+ *
+ * @author Braydon
+ */
+@AllArgsConstructor @Getter @ToString
+public final class UserExistsInput {
+    /**
+     * The email of the user to check.
+     */
+    private final String email;
+
+    /**
+     * The captcha response token to validate.
+     */
+    private final String captchaResponse;
+
+    /**
+     * Check if this input is valid.
+     *
+     * @return whether this input is valid
+     */
+    public boolean isValid() {
+        return email != null && (!email.isBlank())
+                && captchaResponse != null && (!captchaResponse.isBlank());
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/cc/pulseapp/api/service/CaptchaService.java b/src/main/java/cc/pulseapp/api/service/CaptchaService.java
index 299dbef..fffdbca 100644
--- a/src/main/java/cc/pulseapp/api/service/CaptchaService.java
+++ b/src/main/java/cc/pulseapp/api/service/CaptchaService.java
@@ -34,7 +34,7 @@ public final class CaptchaService {
                 .header(HttpHeaders.CONTENT_TYPE, "application/json")
                 .body(body)
                 .asJson();
-        if (EnvironmentUtils.isProduction() && !response.getBody().getObject().getBoolean("success")) {
+        if (/*EnvironmentUtils.isProduction() && */!response.getBody().getObject().getBoolean("success")) {
             throw new BadRequestException(Error.CAPTCHA_INVALID);
         }
     }
diff --git a/src/main/java/cc/pulseapp/api/service/UserService.java b/src/main/java/cc/pulseapp/api/service/UserService.java
index 8dbec01..726e475 100644
--- a/src/main/java/cc/pulseapp/api/service/UserService.java
+++ b/src/main/java/cc/pulseapp/api/service/UserService.java
@@ -11,6 +11,7 @@ import cc.pulseapp.api.model.user.UserDTO;
 import cc.pulseapp.api.model.user.UserFlag;
 import cc.pulseapp.api.model.user.input.CompleteOnboardingInput;
 import cc.pulseapp.api.model.user.input.EnableTFAInput;
+import cc.pulseapp.api.model.user.input.UserExistsInput;
 import cc.pulseapp.api.model.user.response.UserSetupTFAResponse;
 import cc.pulseapp.api.repository.SessionRepository;
 import cc.pulseapp.api.repository.UserRepository;
@@ -56,6 +57,11 @@ public final class UserService {
      */
     @NonNull private final TFAService tfaService;
 
+    /**
+     * The captcha service to use.
+     */
+    @NonNull private final CaptchaService captchaService;
+
     /**
      * The user repository to use.
      */
@@ -80,13 +86,14 @@ public final class UserService {
     @Autowired
     public UserService(@NonNull AuthService authService, @NonNull SnowflakeService snowflakeService,
                        @NonNull OrganizationService orgService, @NonNull StatusPageService statusPageService,
-                       @NonNull TFAService tfaService, @NonNull UserRepository userRepository,
-                       @NonNull SessionRepository sessionRepository) {
+                       @NonNull TFAService tfaService, @NonNull CaptchaService captchaService,
+                       @NonNull UserRepository userRepository, @NonNull SessionRepository sessionRepository) {
         this.authService = authService;
         this.snowflakeService = snowflakeService;
         this.orgService = orgService;
         this.statusPageService = statusPageService;
         this.tfaService = tfaService;
+        this.captchaService = captchaService;
         this.userRepository = userRepository;
         this.sessionRepository = sessionRepository;
     }
@@ -103,13 +110,18 @@ public final class UserService {
     }
 
     /**
-     * Check if the user with the given email exists.
+     * Check if a user exists
+     * with the given email.
      *
-     * @param email the email to check
+     * @param input the input to check
      * @return whether the user exists
      */
-    public boolean doesUserExist(@NonNull String email) {
-        return StringUtils.isValidEmail(email) && userRepository.findByEmailIgnoreCase(email) != null;
+    public boolean doesUserExist(UserExistsInput input) {
+        if (input == null || (!input.isValid())) { // Ensure the input was provided
+            throw new BadRequestException(Error.MALFORMED_USER_EXISTS_INPUT);
+        }
+        captchaService.validateCaptcha(input.getCaptchaResponse());
+        return StringUtils.isValidEmail(input.getEmail()) && userRepository.findByEmailIgnoreCase(input.getEmail()) != null;
     }
 
     /**
@@ -215,6 +227,7 @@ public final class UserService {
      * User errors.
      */
     private enum Error implements IGenericResponse {
+        MALFORMED_USER_EXISTS_INPUT,
         MALFORMED_ONBOARDING_INPUT,
         MALFORMED_ENABLE_TFA_INPUT,
         ORGANIZATION_SLUG_INVALID,