diff --git a/.changeset/mean-ghosts-beam.md b/.changeset/mean-ghosts-beam.md
new file mode 100644
index 0000000..7748d07
--- /dev/null
+++ b/.changeset/mean-ghosts-beam.md
@@ -0,0 +1,5 @@
+---
+"saleor-app-products-feed": patch
+---
+
+Added validation for AWS credentials. If provided configuration for S3 Bucket is invalid, it won't be saved.
diff --git a/apps/products-feed/src/modules/app-configuration/app-configuration.router.ts b/apps/products-feed/src/modules/app-configuration/app-configuration.router.ts
index f34d441..68ed6cb 100644
--- a/apps/products-feed/src/modules/app-configuration/app-configuration.router.ts
+++ b/apps/products-feed/src/modules/app-configuration/app-configuration.router.ts
@@ -5,6 +5,9 @@ import { createLogger } from "@saleor/apps-shared";
 import { updateCacheForConfigurations } from "../metadata-cache/update-cache-for-configurations";
 import { AppConfigSchema } from "./app-config";
 import { z } from "zod";
+import { createS3ClientFromConfiguration } from "../file-storage/s3/create-s3-client-from-configuration";
+import { checkBucketAccess } from "../file-storage/s3/check-bucket-access";
+import { TRPCError } from "@trpc/server";
 
 export const appConfigurationRouter = router({
   /**
@@ -17,13 +20,54 @@ export const appConfigurationRouter = router({
       return c.getRootConfig();
     });
   }),
+  testS3BucketConfiguration: protectedClientProcedure
+    .meta({ requiredClientPermissions: ["MANAGE_APPS"] })
+    .input(AppConfigSchema.s3Bucket)
+    .mutation(async ({ ctx: { saleorApiUrl, getConfig, appConfigMetadataManager }, input }) => {
+      const logger = createLogger({ saleorApiUrl: saleorApiUrl });
+
+      logger.debug("Validate the credentials");
+
+      const s3Client = createS3ClientFromConfiguration(input);
+
+      try {
+        await checkBucketAccess({
+          bucketName: input.bucketName,
+          s3Client,
+        });
+      } catch {
+        logger.debug("Validation failed");
+        throw new TRPCError({
+          code: "BAD_REQUEST",
+          message: "Could not access the S3 bucket using the provided credentials",
+        });
+      }
+    }),
+
   setS3BucketConfiguration: protectedClientProcedure
     .meta({ requiredClientPermissions: ["MANAGE_APPS"] })
     .input(AppConfigSchema.s3Bucket)
     .mutation(async ({ ctx: { saleorApiUrl, getConfig, appConfigMetadataManager }, input }) => {
       const logger = createLogger({ saleorApiUrl: saleorApiUrl });
 
-      logger.debug(input, "Input");
+      logger.debug("Validate credentials");
+
+      const s3Client = createS3ClientFromConfiguration(input);
+
+      try {
+        await checkBucketAccess({
+          bucketName: input.bucketName,
+          s3Client,
+        });
+      } catch {
+        logger.debug("Validation failed");
+        throw new TRPCError({
+          code: "BAD_REQUEST",
+          message: "Could not access the S3 bucket using the provided credentials",
+        });
+      }
+
+      logger.debug("Credentials validated, saving");
 
       const config = await getConfig();
 
diff --git a/apps/products-feed/src/modules/app-configuration/s3-configuration-form.tsx b/apps/products-feed/src/modules/app-configuration/s3-configuration-form.tsx
index e9d0af7..d1b2287 100644
--- a/apps/products-feed/src/modules/app-configuration/s3-configuration-form.tsx
+++ b/apps/products-feed/src/modules/app-configuration/s3-configuration-form.tsx
@@ -14,10 +14,11 @@ type S3BucketConfiguration = Exclude<RootConfig["s3"], null>;
 type Props = {
   initialData: S3BucketConfiguration;
   onSubmit(data: S3BucketConfiguration): Promise<void>;
+  onValidate(data: S3BucketConfiguration): Promise<void>;
 };
 
 export const S3ConfigurationForm = (props: Props) => {
-  const { handleSubmit, control } = useForm<S3BucketConfiguration>({
+  const { handleSubmit, control, getValues } = useForm<S3BucketConfiguration>({
     defaultValues: props.initialData,
     resolver: zodResolver(AppConfigSchema.s3Bucket),
   });
@@ -53,9 +54,14 @@ export const S3ConfigurationForm = (props: Props) => {
         placeholder={"eu-west-1"}
       />
 
-      <Button type="submit" variant="primary" alignSelf={"end"}>
-        Save bucket configuration
-      </Button>
+      <Box display={"flex"} flexDirection={"row"} gap={4} justifyContent={"flex-end"}>
+        <Button variant="secondary" onClick={() => props.onValidate(getValues())}>
+          Test credentials
+        </Button>
+        <Button type="submit" variant="primary">
+          Save bucket configuration
+        </Button>
+      </Box>
     </Box>
   );
 };
@@ -67,10 +73,25 @@ export const ConnectedS3ConfigurationForm = () => {
     onSuccess() {
       notifySuccess("Success", "Updated S3 configuration");
     },
-    onError() {
+    onError({ message }) {
+      if (message) {
+        notifyError("Error", message);
+        return;
+      }
       notifyError("Error", "Failed to update, please refresh and try again");
     },
   });
+
+  const { mutate: testConfigurationMutate } =
+    trpcClient.appConfiguration.testS3BucketConfiguration.useMutation({
+      onSuccess() {
+        notifySuccess("Configuration is valid");
+      },
+      onError({ message }) {
+        notifyError("Error", message);
+      },
+    });
+
   const { data, isLoading } = trpcClient.appConfiguration.fetch.useQuery();
 
   const handleSubmit = useCallback(
@@ -80,6 +101,13 @@ export const ConnectedS3ConfigurationForm = () => {
     [mutate]
   );
 
+  const handleValidate = useCallback(
+    async (data: S3BucketConfiguration) => {
+      testConfigurationMutate(data);
+    },
+    [testConfigurationMutate]
+  );
+
   const formData: S3BucketConfiguration = useMemo(() => {
     if (data?.s3) {
       return data.s3;
@@ -97,5 +125,11 @@ export const ConnectedS3ConfigurationForm = () => {
     return <Text>Loading...</Text>;
   }
 
-  return <S3ConfigurationForm onSubmit={handleSubmit} initialData={formData} />;
+  return (
+    <S3ConfigurationForm
+      onSubmit={handleSubmit}
+      initialData={formData}
+      onValidate={handleValidate}
+    />
+  );
 };
diff --git a/apps/products-feed/src/modules/file-storage/s3/check-bucket-access.ts b/apps/products-feed/src/modules/file-storage/s3/check-bucket-access.ts
new file mode 100644
index 0000000..97469f2
--- /dev/null
+++ b/apps/products-feed/src/modules/file-storage/s3/check-bucket-access.ts
@@ -0,0 +1,15 @@
+import { HeadBucketCommand, S3Client } from "@aws-sdk/client-s3";
+
+interface checkBucketAccessArgs {
+  s3Client: S3Client;
+  bucketName: string;
+}
+
+// Check if client can access the bucket. Throws an error otherwise
+export const checkBucketAccess = async ({ s3Client, bucketName }: checkBucketAccessArgs) => {
+  await s3Client.send(
+    new HeadBucketCommand({
+      Bucket: bucketName,
+    })
+  );
+};