diff --git a/src/axios.ts b/src/axios.ts
index 14defd5..5eed910 100644
--- a/src/axios.ts
+++ b/src/axios.ts
@@ -1,31 +1,37 @@
-import Axios, { AxiosRequestConfig } from "axios";
+import Axios, {AxiosError, AxiosRequestConfig} from "axios";
+import {S5Error} from "#client.js";
 
 export const customInstance = <T>(
-  config: AxiosRequestConfig,
-  options?: AxiosRequestConfig,
+    config: AxiosRequestConfig,
+    options?: AxiosRequestConfig,
 ): Promise<T> => {
-  const source = Axios.CancelToken.source();
+    const source = Axios.CancelToken.source();
 
-  /*
-    Hack to ensure that the data is passed to the request as an option.
-     */
-  if (options?.data) {
-    config = config || {};
-    config.data = options.data;
-    delete config.data;
-  }
+    /*
+      Hack to ensure that the data is passed to the request as an option.
+       */
+    if (options?.data) {
+        config = config || {};
+        config.data = options.data;
+        delete config.data;
+    }
 
-  const instance = Axios.create({ baseURL: options?.baseURL });
-  const promise = instance({
-    ...config,
-    ...options,
-    cancelToken: source.token,
-  }).then(({ data }) => data);
+    const instance = Axios.create({baseURL: options?.baseURL});
+    const promise = instance({
+        ...config,
+        ...options,
+        cancelToken: source.token,
+    }).then(({data}) => data).catch((error) => {
+        if (Axios.isCancel(error)) {
+            return;
+        }
+        throw new S5Error((error as AxiosError).message, (error as AxiosError).response?.status as number);
+    })
 
-  // @ts-ignore
-  promise.cancel = () => {
-    source.cancel("Query was cancelled");
-  };
+    // @ts-ignore
+    promise.cancel = () => {
+        source.cancel("Query was cancelled");
+    };
 
-  return promise;
+    return promise;
 };
diff --git a/src/client.ts b/src/client.ts
index b00e6de..3ea2f25 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -70,6 +70,16 @@ import { Multihash } from "@lumeweb/libs5/lib/multihash.js";
 import { blake3 } from "@noble/hashes/blake3";
 import { base64urlDecode, base64urlEncode } from "#utils/encoding.js";
 
+export class S5Error extends Error {
+    public statusCode: number;
+
+    constructor(message: string, statusCode: number) {
+        super(message);
+        this.name = "S5Error";
+        this.statusCode = statusCode;
+    }
+}
+
 /**
  * The S5 Client which can be used to access S5-net.
  */