diff --git a/api/v1/products/product_model.php b/api/v1/products/product_model.php
new file mode 100644
index 000000000..32344ccb2
--- /dev/null
+++ b/api/v1/products/product_model.php
@@ -0,0 +1,50 @@
+<?php
+
+// Map product API field names to the input keys used by productSave().
+$field_names = [
+    'product_name' => 'name',
+    'product_type' => 'type',
+    'product_category_id' => 'category',
+    'product_price' => 'price',
+    'product_cost' => 'cost',
+    'product_tax_id' => 'tax',
+    'product_frequency' => 'frequency',
+    'product_seat_source' => 'seat_source',
+    'product_code' => 'code',
+    'product_vendor_id' => 'vendor',
+    'product_vendor_part' => 'vendor_part',
+    'product_reorder_level' => 'reorder_level',
+    'product_reorder_qty' => 'reorder_qty',
+    'product_location' => 'location',
+    'product_asset_type' => 'asset_type',
+    'product_make' => 'make',
+    'product_model' => 'model',
+    'product_warranty_months' => 'warranty_months',
+    'product_description' => 'description',
+    'product_notes' => 'notes',
+    'product_track_stock' => 'track_stock',
+];
+
+$product_input = [];
+$product_model_error = '';
+
+foreach ($field_names as $api_field => $key) {
+    if (!array_key_exists($api_field, $_POST)) {
+        continue;
+    }
+    if (!is_scalar($_POST[$api_field]) && $_POST[$api_field] !== null) {
+        $product_model_error = "The $api_field field must be a scalar value.";
+        break;
+    }
+
+    $value = (string) ($_POST[$api_field] ?? '');
+    if ($key === 'track_stock') {
+        $value = in_array(strtolower(trim($value)), ['1', 'true', 'yes', 'on', 'tracked'], true);
+    }
+    $product_input[$key] = $value;
+}
+
+// The product form posts the stock switch with the type, including when it is off.
+if (array_key_exists('type', $product_input) && !array_key_exists('track_stock', $product_input)) {
+    $product_input['track_stock'] = false;
+}
diff --git a/api/v1/products/update.php b/api/v1/products/update.php
new file mode 100644
index 000000000..63f841305
--- /dev/null
+++ b/api/v1/products/update.php
@@ -0,0 +1,60 @@
+<?php
+
+require_once '../validate_api_key.php';
+
+require_once '../require_post_method.php';
+
+// Parse ID
+$product_id = intval($_POST['product_id'] ?? 0);
+
+// Default
+$update_count = false;
+
+if (!empty($product_id)) {
+
+    $product_row = productRow($product_id);
+
+    // Variable assignment from POST - only supplied fields are changed
+    require_once 'product_model.php';
+
+    if ($product_row) {
+
+        if ($product_model_error !== '') {
+            http_response_code(400);
+            $return_arr['success'] = "False";
+            $return_arr['message'] = $product_model_error;
+            echo json_encode($return_arr);
+            exit();
+        }
+
+        if (!$product_input) {
+            http_response_code(400);
+            $return_arr['success'] = "False";
+            $return_arr['message'] = 'Provide at least one product field to update.';
+            echo json_encode($return_arr);
+            exit();
+        }
+
+        if (!productSave($product_input, $product_id, $error)) {
+            http_response_code(400);
+            $return_arr['success'] = "False";
+            $return_arr['message'] = $error;
+            echo json_encode($return_arr);
+            exit();
+        }
+
+        // Check update & get the updated product
+        if (!mysqli_errno($mysqli)) {
+            $product_row = productRow($product_id);
+            $product_name = escapeSql($product_row['product_name']);
+            $update_count = 1;
+
+            // Logging
+            logAudit("Product", "Edit", "$product_name via API ($api_key_name)", 0, $product_id);
+            logAudit("API", "Success", "Edited product $product_name via API ($api_key_name)", 0, $product_id);
+        }
+    }
+}
+
+// Output
+require_once '../update_output.php';