diff --git a/examples/aws-nodejs/public/index.html b/examples/aws-nodejs/public/index.html
index d3a09d7b5..1173b0c2c 100644
--- a/examples/aws-nodejs/public/index.html
+++ b/examples/aws-nodejs/public/index.html
@@ -57,7 +57,7 @@
             height: 400,
           })
           .use(AwsS3, {
-            bucket: window.UPPY_S3_BUCKET,
+            s3Endpoint: `https://${window.UPPY_S3_BUCKET}.s3.${window.UPPY_S3_REGION}.amazonaws.com`,
             region: window.UPPY_S3_REGION,
             getCredentials: async ({ signal }) => {
               const response = await fetch('/s3/sts', { signal })
diff --git a/examples/aws-php/main.js b/examples/aws-php/main.js
index 4704663bf..fbff325cb 100644
--- a/examples/aws-php/main.js
+++ b/examples/aws-php/main.js
@@ -11,34 +11,24 @@ uppy.use(Dashboard, {
   target: 'body',
 })
 uppy.use(AwsS3, {
-  shouldUseMultipart: false, // The PHP backend only supports non-multipart uploads
+  // The PHP backend only signs single PutObject URLs (no multipart).
+  shouldUseMultipart: false,
 
-  getUploadParameters(file) {
-    // Send a request to our PHP signing endpoint.
-    return fetch('/s3-sign.php', {
-      method: 'post',
-      // Send and receive JSON.
+  // signRequest is called for each S3 operation. For single PUTs the
+  // request is `{ method: 'PUT', key }`. The server returns a presigned URL.
+  signRequest: async (request) => {
+    const response = await fetch('/s3-sign.php', {
+      method: 'POST',
       headers: {
         accept: 'application/json',
         'content-type': 'application/json',
       },
       body: JSON.stringify({
-        filename: file.name,
-        contentType: file.type,
+        method: request.method,
+        key: request.key,
       }),
     })
-      .then((response) => {
-        // Parse the JSON response.
-        return response.json()
-      })
-      .then((data) => {
-        // Return an object in the correct shape.
-        return {
-          method: data.method,
-          url: data.url,
-          fields: data.fields,
-          headers: data.headers,
-        }
-      })
+    if (!response.ok) throw new Error('Failed to get presigned URL')
+    return response.json()
   },
 })
diff --git a/examples/aws-php/s3-sign.php b/examples/aws-php/s3-sign.php
index b6ea7b828..21b625378 100644
--- a/examples/aws-php/s3-sign.php
+++ b/examples/aws-php/s3-sign.php
@@ -2,7 +2,7 @@
 
 require 'vendor/autoload.php';
 header('Access-Control-Allow-Origin: *');
-header("Access-Control-Allow-Headers: GET");
+header('Access-Control-Allow-Headers: GET, POST');
 
 // CONFIG: Change these variables to a valid region and bucket.
 $awsEndpoint = getenv('COMPANION_AWS_ENDPOINT') ?: null;
@@ -18,29 +18,28 @@ $s3 = new Aws\S3\S3Client([
   'region' => $awsRegion,
 ]);
 
-// Retrieve data about the file to be uploaded from the request body.
+// The @uppy/aws-s3 plugin sends `{ method, key }` per operation.
+// This example only handles PUT (PutObject) — multipart is disabled client-side.
 $body = json_decode(file_get_contents('php://input'));
-$filename = $body->filename;
-$contentType = $body->contentType;
+$method = $body->method ?? 'PUT';
+$key = $body->key ?? null;
+
+if ($method !== 'PUT' || !$key) {
+  http_response_code(400);
+  header('content-type: application/json');
+  echo json_encode(['error' => 'Only PUT requests with a key are supported']);
+  exit;
+}
 
-// Prepare a PutObject command.
 $command = $s3->getCommand('putObject', [
   'Bucket' => $bucket,
-  'Key' => "{$directory}/{$filename}",
-  'ContentType' => $contentType,
-  'Body' => '',
+  'Key' => "{$directory}/{$key}",
 ]);
 
 $request = $s3->createPresignedRequest($command, '+5 minutes');
 
 header('content-type: application/json');
+// signRequest expects a `{ url }` response — no method/fields/headers.
 echo json_encode([
-  'method' => $request->getMethod(),
   'url' => (string) $request->getUri(),
-  'fields' => [],
-  // Also set the content-type header on the request, to make sure that it is the same as the one we used to generate the signature.
-  // Else, the browser picks a content-type as it sees fit.
-  'headers' => [
-    'content-type' => $contentType,
-  ],
 ]);
diff --git a/examples/companion-digitalocean-spaces/README.md b/examples/companion-digitalocean-spaces/README.md
index a9b4a9cab..f1cd992bc 100644
--- a/examples/companion-digitalocean-spaces/README.md
+++ b/examples/companion-digitalocean-spaces/README.md
@@ -3,7 +3,7 @@
 This example uses Uppy to upload files to a
 [DigitalOcean Space](https://digitaloceanspaces.com/). DigitalOcean Spaces has
 an identical API to S3, so we can use the
-[AwsS3](https://uppy.io/docs/aws-s3-multipart) plugin. We use @uppy/companion
+[AwsS3](https://uppy.io/docs/aws-s3) plugin. We use @uppy/companion
 with a [custom `endpoint` configuration](./server.cjs#L39) that points to
 DigitalOcean.
 
@@ -30,7 +30,7 @@ copy the `.env.example` file:
 ```
 
 To setup the CORS settings of your Spaces bucket in accordance with
-[the plugin docs](https://uppy.io/docs/aws-s3-multipart/#setting-up-your-s3-bucket),
+[the plugin docs](https://uppy.io/docs/aws-s3/#setting-up-your-s3-bucket),
 you can use the [example XML config file](./setcors.xml) with the
 [`s3cmd` CLI](https://docs.digitalocean.com/products/spaces/reference/s3cmd/):
 
diff --git a/examples/companion-digitalocean-spaces/main.js b/examples/companion-digitalocean-spaces/main.js
index c1be7320c..4510daaea 100644
--- a/examples/companion-digitalocean-spaces/main.js
+++ b/examples/companion-digitalocean-spaces/main.js
@@ -15,4 +15,4 @@ uppy.use(Dashboard, {
 })
 
 // No client side changes needed!
-uppy.use(AwsS3, { companionUrl: '/companion' })
+uppy.use(AwsS3, { companionEndpoint: '/companion' })