diff --git a/src/error.ts b/src/error.ts
new file mode 100644
index 0000000..01c9a87
--- /dev/null
+++ b/src/error.ts
@@ -0,0 +1,13 @@
+class ResponseError extends Error {
+  constructor(
+    public error: string,
+    public status_code: number,
+  ) {
+    super(error)
+    this.name = 'ResponseError'
+
+    if (Error.captureStackTrace) {
+      Error.captureStackTrace(this, ResponseError)
+    }
+  }
+}
diff --git a/src/utils.ts b/src/utils.ts
index 0389f11..d0b3c0d 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -15,11 +15,12 @@ export const formatAddress = (address: string): string => {
 const checkOk = async (response: Response): Promise<void> => {
   if (!response.ok) {
     let message = `Error ${response.status}: ${response.statusText}`
+    let errorData: ErrorResponse | null = null
 
     if (response.headers.get('content-type')?.includes('application/json')) {
       try {
-        const errorResponse = (await response.json()) as ErrorResponse
-        message = errorResponse.error || message
+        errorData = (await response.json()) as ErrorResponse
+        message = errorData.error || message
       } catch (error) {
         console.log('Failed to parse error response as JSON')
       }
@@ -33,7 +34,7 @@ const checkOk = async (response: Response): Promise<void> => {
       }
     }
 
-    throw new Error(message)
+    throw new ResponseError(message, response.status)
   }
 }