diff --git a/application/Espo/Tools/OpenApi/Api/GetSpec.php b/application/Espo/Tools/OpenApi/Api/GetSpec.php
index 28edcbbcd1..2e72bfef86 100644
--- a/application/Espo/Tools/OpenApi/Api/GetSpec.php
+++ b/application/Espo/Tools/OpenApi/Api/GetSpec.php
@@ -57,8 +57,14 @@ class GetSpec implements Action
         $provider = $this->providerFactory->create();
 
         $skipCustom = $request->getQueryParam('skipCustom') === 'true';
+        $module = $request->getQueryParam('module');
 
-        $spec = $provider->get(new Params(skipCustom: $skipCustom));
+        $params = new Params(
+            skipCustom: $skipCustom,
+            module: $module,
+        );
+
+        $spec = $provider->get($params);
 
         return ResponseComposer::empty()
             ->writeBody($spec)
diff --git a/application/Espo/Tools/OpenApi/Provider.php b/application/Espo/Tools/OpenApi/Provider.php
index 5009ff75b1..e2653125ff 100644
--- a/application/Espo/Tools/OpenApi/Provider.php
+++ b/application/Espo/Tools/OpenApi/Provider.php
@@ -32,11 +32,13 @@ namespace Espo\Tools\OpenApi;
 use Espo\Core\Acl\GlobalRestriction;
 use Espo\Core\Acl\Table;
 use Espo\Core\AclManager;
+use Espo\Core\Exceptions\BadRequest;
 use Espo\Core\Select\Where\Item\Type as WhereItemType;
 use Espo\Core\Utils\DataCache;
 use Espo\Core\Utils\FieldUtil;
 use Espo\Core\Utils\Json;
 use Espo\Core\Utils\Metadata;
+use Espo\Core\Utils\Module;
 use Espo\Entities\Team;
 use Espo\ORM\Defs;
 use Espo\ORM\Defs\Params\FieldParam;
@@ -65,10 +67,17 @@ class Provider
         private AclManager $aclManager,
         private FieldUtil $fieldUtil,
         private DataCache $dataCache,
+        private Module $module,
     ) {}
 
+    /**
+     * @throws BadRequest
+     */
     public function get(Params $params): string
     {
+        $this->validateParams($params);
+        $params = $this->sanitizeParams($params);
+
         $data = $this->getData($params);
 
         return Json::encode($data, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE);
@@ -139,8 +148,14 @@ class Provider
     {
         $key = self::CACHE_KEY;
 
+        if ($params->module !== null) {
+            $key .= '_' . $params->module;
+
+            return $key;
+        }
+
         if ($params->skipCustom) {
-            $key .= 'SkipCustom';
+            $key .= '_skipCustom';
         }
 
         return $key;
@@ -198,6 +213,10 @@ class Provider
             $disabled = $it['disabled'] ?? false;
             $module = $it['module'] ?? false;
 
+            if ($params->module !== null && $params->module !== $module) {
+                continue;
+            }
+
             if ($params->skipCustom && $module === 'Custom') {
                 continue;
             }
@@ -1114,4 +1133,26 @@ class Provider
 
         return $createOperation;
     }
+
+    /**
+     * @throws BadRequest
+     */
+    private function validateParams(Params $params): void
+    {
+        if (
+            $params->module !== null &&
+            !in_array($params->module, $this->module->getList())
+        ) {
+            throw new BadRequest("Module does not exist.");
+        }
+    }
+
+    private function sanitizeParams(Params $params): Params
+    {
+        if ($params->module !== null) {
+            $params = $params->withSkipCustom(true);
+        }
+
+        return $params;
+    }
 }
diff --git a/application/Espo/Tools/OpenApi/Provider/Params.php b/application/Espo/Tools/OpenApi/Provider/Params.php
index c8bb84d7f6..f5ac570413 100644
--- a/application/Espo/Tools/OpenApi/Provider/Params.php
+++ b/application/Espo/Tools/OpenApi/Provider/Params.php
@@ -6,5 +6,14 @@ readonly class Params
 {
     public function __construct(
         public bool $skipCustom = false,
+        public ?string $module = null,
     ) {}
+
+    public function withSkipCustom(bool $skipCustom): self
+    {
+        return new self(
+            skipCustom: $skipCustom,
+            module: $this->module,
+        );
+    }
 }