diff --git a/server/graph/schema.graphqls b/server/graph/schema.graphqls
index fdb2f50..9fc5919 100644
--- a/server/graph/schema.graphqls
+++ b/server/graph/schema.graphqls
@@ -610,6 +610,7 @@ input GetUserRequest {
 }
 
 type Mutation {
+  is_registered(email: String): AuthResponse! # custom api
   signup(params: SignUpInput!): AuthResponse!
   # Deprecated from v1.2.0
   mobile_signup(params: MobileSignUpInput): AuthResponse!
diff --git a/server/graph/schema.resolvers.go b/server/graph/schema.resolvers.go
index a90930b..bec4ae3 100644
--- a/server/graph/schema.resolvers.go
+++ b/server/graph/schema.resolvers.go
@@ -12,6 +12,11 @@ import (
 	"github.com/authorizerdev/authorizer/server/resolvers"
 )
 
+// Signup is the resolver for the signup field.
+func (r *queryResolver) IsRegistered(ctx context.Context, email string) (*model.AuthResponse, error) {
+	return resolvers.IsRegisteredResolver(ctx, email)
+}
+
 // Signup is the resolver for the signup field.
 func (r *mutationResolver) Signup(ctx context.Context, params model.SignUpInput) (*model.AuthResponse, error) {
 	return resolvers.SignupResolver(ctx, params)
diff --git a/server/resolvers/is_registered.go b/server/resolvers/is_registered.go
new file mode 100644
index 0000000..92bd8ec
--- /dev/null
+++ b/server/resolvers/is_registered.go
@@ -0,0 +1,44 @@
+package resolvers
+
+import (
+	"context"
+	"fmt"
+	"github.com/authorizerdev/authorizer/server/db"
+	"github.com/authorizerdev/authorizer/server/graph/model"
+	"github.com/authorizerdev/authorizer/server/refs"
+	log "github.com/sirupsen/logrus"
+	"strings"
+)
+
+// IsRegisteredResolver is a resolver for registered checkup query
+func IsRegisteredResolver(ctx context.Context, email string) (*model.AuthResponse, error) {
+	var res *model.AuthResponse
+	email = strings.TrimSpace(refs.StringValue(&email))
+	if email == "" {
+		log.Debug("Email is required")
+		return res, fmt.Errorf(`email is required`)
+	}
+
+	log := log.WithField("email", email)
+
+	// find user with email
+	existingUser, err := db.Provider.GetUserByEmail(ctx, email)
+	if err != nil {
+		log.Debug("Failed to get user by email: ", err)
+	}
+
+	if existingUser != nil {
+		res.Message = "registered"
+		if existingUser.EmailVerifiedAt != nil {
+			res.Message = "verified"
+			log.Debug("Email is already verified and signed up.")
+			return res, fmt.Errorf(`%s has already signed up`, email)
+		} else if existingUser.ID != "" && existingUser.EmailVerifiedAt == nil {
+			res.Message = "not verified"
+			log.Debug("Email is already signed up. Verification pending...")
+			return res, fmt.Errorf("%s has already signed up. please complete the email verification process or reset the password", email)
+		}
+	}
+
+	return res, nil
+}