diff --git a/src/Responses/Responses/CreateResponse.php b/src/Responses/Responses/CreateResponse.php
index 578e1ae3..b1fbafd6 100644
--- a/src/Responses/Responses/CreateResponse.php
+++ b/src/Responses/Responses/CreateResponse.php
@@ -52,7 +52,7 @@
  * @phpstan-import-type FunctionToolType from FunctionTool
  * @phpstan-import-type WebSearchToolType from WebSearchTool
  * @phpstan-import-type CodeInterpreterToolType from CodeInterpreterTool
- * @phpstan-import-type ErrorType from CreateResponseError
+ * @phpstan-import-type ErrorType from GenericResponseError
  * @phpstan-import-type IncompleteDetailsType from CreateResponseIncompleteDetails
  * @phpstan-import-type UsageType from CreateResponseUsage
  * @phpstan-import-type FunctionToolChoiceType from FunctionToolChoice
@@ -93,7 +93,7 @@ private function __construct(
         public readonly string $object,
         public readonly int $createdAt,
         public readonly string $status,
-        public readonly ?CreateResponseError $error,
+        public readonly ?GenericResponseError $error,
         public readonly ?CreateResponseIncompleteDetails $incompleteDetails,
         public readonly array|string|null $instructions,
         public readonly ?int $maxToolCalls,
@@ -184,7 +184,7 @@ public static function from(array $attributes, MetaInformation $meta): self
             createdAt: $attributes['created_at'],
             status: $attributes['status'],
             error: isset($attributes['error'])
-                ? CreateResponseError::from($attributes['error'])
+                ? GenericResponseError::from($attributes['error'])
                 : null,
             incompleteDetails: isset($attributes['incomplete_details'])
                 ? CreateResponseIncompleteDetails::from($attributes['incomplete_details'])
diff --git a/src/Responses/Responses/CreateResponseError.php b/src/Responses/Responses/GenericResponseError.php
similarity index 83%
rename from src/Responses/Responses/CreateResponseError.php
rename to src/Responses/Responses/GenericResponseError.php
index 42e1e625..77c5d80d 100644
--- a/src/Responses/Responses/CreateResponseError.php
+++ b/src/Responses/Responses/GenericResponseError.php
@@ -9,11 +9,11 @@
 use OpenAI\Testing\Responses\Concerns\Fakeable;
 
 /**
- * @phpstan-type ErrorType array{code: string, message: string}
+ * @phpstan-type ErrorType array{code: string|int, message: string}
  *
  * @implements ResponseContract<ErrorType>
  */
-final class CreateResponseError implements ResponseContract
+final class GenericResponseError implements ResponseContract
 {
     /**
      * @use ArrayAccessible<ErrorType>
@@ -33,7 +33,7 @@ private function __construct(
     public static function from(array $attributes): self
     {
         return new self(
-            code: $attributes['code'],
+            code: (string) $attributes['code'],
             message: $attributes['message'],
         );
     }
diff --git a/src/Responses/Responses/Output/OutputMcpCall.php b/src/Responses/Responses/Output/OutputMcpCall.php
index 9436cc6b..d5375e50 100644
--- a/src/Responses/Responses/Output/OutputMcpCall.php
+++ b/src/Responses/Responses/Output/OutputMcpCall.php
@@ -6,10 +6,13 @@
 
 use OpenAI\Contracts\ResponseContract;
 use OpenAI\Responses\Concerns\ArrayAccessible;
+use OpenAI\Responses\Responses\GenericResponseError;
 use OpenAI\Testing\Responses\Concerns\Fakeable;
 
 /**
- * @phpstan-type OutputMcpCallType array{id: string, server_label: string, type: 'mcp_call', approval_request_id: ?string, arguments: string, error: ?string, name: string, output: ?string}
+ * @phpstan-import-type ErrorType from GenericResponseError
+ *
+ * @phpstan-type OutputMcpCallType array{id: string, server_label: string, type: 'mcp_call', approval_request_id: ?string, arguments: string, error: string|ErrorType|null, name: string, output: ?string}
  *
  * @implements ResponseContract<OutputMcpCallType>
  */
@@ -32,7 +35,7 @@ private function __construct(
         public readonly string $arguments,
         public readonly string $name,
         public readonly ?string $approvalRequestId = null,
-        public readonly ?string $error = null,
+        public readonly ?GenericResponseError $error = null,
         public readonly ?string $output = null,
     ) {}
 
@@ -41,6 +44,20 @@ private function __construct(
      */
     public static function from(array $attributes): self
     {
+        // OpenAI has odd structure (presumably a bug) where the errorType can sometimes be a full-fledged HTTP error object.
+        // As MCP calls are valid HTTP requests - we need to handle strings & objects here.
+        $errorType = null;
+        if (isset($attributes['error'])) {
+            if (is_array($attributes['error'])) {
+                $errorType = GenericResponseError::from($attributes['error']);
+            } elseif (is_string($attributes['error'])) {
+                $errorType = GenericResponseError::from([
+                    'code' => 'unknown_error',
+                    'message' => $attributes['error'],
+                ]);
+            }
+        }
+
         return new self(
             id: $attributes['id'],
             serverLabel: $attributes['server_label'],
@@ -48,7 +65,7 @@ public static function from(array $attributes): self
             arguments: $attributes['arguments'],
             name: $attributes['name'],
             approvalRequestId: $attributes['approval_request_id'],
-            error: $attributes['error'],
+            error: $errorType,
             output: $attributes['output'],
         );
     }
@@ -65,7 +82,9 @@ public function toArray(): array
             'arguments' => $this->arguments,
             'name' => $this->name,
             'approval_request_id' => $this->approvalRequestId,
-            'error' => $this->error,
+            'error' => $this->error instanceof GenericResponseError
+                ? $this->error->toArray()
+                : $this->error,
             'output' => $this->output,
         ];
     }
diff --git a/src/Responses/Responses/RetrieveResponse.php b/src/Responses/Responses/RetrieveResponse.php
index f2c4ea42..0606f960 100644
--- a/src/Responses/Responses/RetrieveResponse.php
+++ b/src/Responses/Responses/RetrieveResponse.php
@@ -53,7 +53,7 @@
  * @phpstan-import-type FunctionToolType from FunctionTool
  * @phpstan-import-type WebSearchToolType from WebSearchTool
  * @phpstan-import-type CodeInterpreterToolType from CodeInterpreterTool
- * @phpstan-import-type ErrorType from CreateResponseError
+ * @phpstan-import-type ErrorType from GenericResponseError
  * @phpstan-import-type IncompleteDetailsType from CreateResponseIncompleteDetails
  * @phpstan-import-type UsageType from CreateResponseUsage
  * @phpstan-import-type FunctionToolChoiceType from FunctionToolChoice
@@ -94,7 +94,7 @@ private function __construct(
         public readonly string $object,
         public readonly int $createdAt,
         public readonly string $status,
-        public readonly ?CreateResponseError $error,
+        public readonly ?GenericResponseError $error,
         public readonly ?CreateResponseIncompleteDetails $incompleteDetails,
         public readonly array|string|null $instructions,
         public readonly ?int $maxToolCalls,
@@ -185,7 +185,7 @@ public static function from(array $attributes, MetaInformation $meta): self
             createdAt: $attributes['created_at'],
             status: $attributes['status'],
             error: isset($attributes['error'])
-                ? CreateResponseError::from($attributes['error'])
+                ? GenericResponseError::from($attributes['error'])
                 : null,
             incompleteDetails: isset($attributes['incomplete_details'])
                 ? CreateResponseIncompleteDetails::from($attributes['incomplete_details'])
diff --git a/src/Responses/Responses/Tool/RemoteMcpTool.php b/src/Responses/Responses/Tool/RemoteMcpTool.php
index 88b0f73b..9c49005c 100644
--- a/src/Responses/Responses/Tool/RemoteMcpTool.php
+++ b/src/Responses/Responses/Tool/RemoteMcpTool.php
@@ -11,7 +11,7 @@
 /**
  * @phpstan-import-type McpToolNamesFilterType from McpToolNamesFilter
  *
- * @phpstan-type RemoteMcpToolType array{type: 'mcp', server_label: string, server_url: string, require_approval: 'never'|'always'|array<'never'|'always', McpToolNamesFilterType>|null, allowed_tools: array<int, string>|McpToolNamesFilterType|null, headers: array<string, string>|null}
+ * @phpstan-type RemoteMcpToolType array{type: 'mcp', server_label: string, authorization: string|null, connector_id?: string|null, server_url: string|null, require_approval: 'never'|'always'|array<'never'|'always', McpToolNamesFilterType>|null, allowed_tools: array<int, string>|McpToolNamesFilterType|null, headers: array<string, string>|null, server_description?: string|null}
  *
  * @implements ResponseContract<RemoteMcpToolType>
  */
@@ -33,10 +33,13 @@ final class RemoteMcpTool implements ResponseContract
     private function __construct(
         public readonly string $type,
         public readonly string $serverLabel,
-        public readonly string $serverUrl,
+        public readonly ?string $serverUrl = null,
         public readonly string|array|null $requireApproval = null,
         public readonly array|McpToolNamesFilter|null $allowedTools = null,
         public readonly ?array $headers = null,
+        public readonly ?string $connectorId = null,
+        public readonly ?string $authorization = null,
+        public readonly ?string $serverDescription = null,
     ) {}
 
     /**
@@ -59,10 +62,13 @@ public static function from(array $attributes): self
         return new self(
             type: $attributes['type'],
             serverLabel: $attributes['server_label'],
-            serverUrl: $attributes['server_url'],
+            serverUrl: $attributes['server_url'] ?? null,
             requireApproval: $requireApproval,
             allowedTools: $allowedTools, // @phpstan-ignore-line
             headers: $attributes['headers'] ?? null,
+            connectorId: $attributes['connector_id'] ?? null,
+            authorization: $attributes['authorization'] ?? null,
+            serverDescription: $attributes['server_description'] ?? null,
         );
     }
 
@@ -90,6 +96,9 @@ public function toArray(): array
             'require_approval' => $requireApproval,
             'allowed_tools' => $allowedTools,
             'headers' => $this->headers,
+            'connector_id' => $this->connectorId,
+            'authorization' => $this->authorization,
+            'server_description' => $this->serverDescription,
         ];
     }
 }
diff --git a/tests/Fixtures/Responses.php b/tests/Fixtures/Responses.php
index 2de7c28a..8ecb544e 100644
--- a/tests/Fixtures/Responses.php
+++ b/tests/Fixtures/Responses.php
@@ -50,6 +50,7 @@ function createResponseResource(): array
             toolFileSearch(),
             toolImageGeneration(),
             toolRemoteMcp(),
+            toolConnectorMcp(),
         ],
         'top_logprobs' => null,
         'top_p' => 1.0,
@@ -186,6 +187,7 @@ function retrieveResponseResource(): array
             toolFileSearch(),
             toolImageGeneration(),
             toolRemoteMcp(),
+            toolConnectorMcp(),
         ],
         'top_logprobs' => null,
         'top_p' => 1.0,
@@ -311,6 +313,44 @@ function outputMcpCall(): array
     ];
 }
 
+/**
+ * @return array<string, mixed>
+ */
+function outputMcpErrorCallObject(): array
+{
+    return [
+        'id' => 'mcp_67ccf18f64008190a39b619f4c8455ef087bb177ab789d5c',
+        'type' => 'mcp_call',
+        'approval_request_id' => null,
+        'arguments' => json_encode(['topk' => 50]),
+        'error' => [
+            'type' => 'http_error',
+            'code' => 401,
+            'message' => 'Unauthorized',
+        ],
+        'name' => 'list_recent_files',
+        'output' => null,
+        'server_label' => 'Dropbox',
+    ];
+}
+
+/**
+ * @return array<string, mixed>
+ */
+function outputMcpErrorCallString(): array
+{
+    return [
+        'id' => 'mcp_67ccf18f64008190a39b619f4c8455ef087bb177ab789d5c',
+        'type' => 'mcp_call',
+        'approval_request_id' => null,
+        'arguments' => json_encode(['topk' => 50]),
+        'error' => 'Missing or invalid authorization token.',
+        'name' => 'list_recent_files',
+        'output' => null,
+        'server_label' => 'Dropbox',
+    ];
+}
+
 /**
  * @return array<string, mixed>
  */
@@ -544,6 +584,27 @@ function toolRemoteMcp(): array
         'require_approval' => null,
         'allowed_tools' => null,
         'headers' => null,
+        'connector_id' => null,
+        'authorization' => null,
+        'server_description' => null,
+    ];
+}
+
+/**
+ * @return array<string, mixed>
+ */
+function toolConnectorMcp(): array
+{
+    return [
+        'type' => 'mcp',
+        'server_label' => 'Dropbox',
+        'server_url' => null,
+        'require_approval' => 'never',
+        'allowed_tools' => null,
+        'headers' => null,
+        'connector_id' => 'connector_dropbox',
+        'authorization' => '<redacted>',
+        'server_description' => null,
     ];
 }
 
diff --git a/tests/Responses/Responses/Output/OutputMcpCall.php b/tests/Responses/Responses/Output/OutputMcpCall.php
index 68e49266..6d4d8cc9 100644
--- a/tests/Responses/Responses/Output/OutputMcpCall.php
+++ b/tests/Responses/Responses/Output/OutputMcpCall.php
@@ -1,5 +1,6 @@
 <?php
 
+use OpenAI\Responses\Responses\GenericResponseError;
 use OpenAI\Responses\Responses\Output\OutputMcpCall;
 
 test('from', function () {
@@ -17,6 +18,29 @@
         ->output->toBeNull();
 });
 
+test('from error as http object', function () {
+    $response = OutputMcpCall::from(outputMcpErrorCallObject());
+
+    expect($response)
+        ->toBeInstanceOf(OutputMcpCall::class)
+        ->error->toBeInstanceOf(GenericResponseError::class)
+        ->and($response->error)
+        ->code->toBe('401')
+        ->message->toBe('Unauthorized');
+});
+
+test('from error as string', function () {
+    $response = OutputMcpCall::from(outputMcpErrorCallString());
+
+    expect($response)
+        ->toBeInstanceOf(OutputMcpCall::class)
+        ->error->toBeInstanceOf(GenericResponseError::class)
+        ->and($response->error)
+        ->code->toBe('unknown_error')
+        ->message->toBe('Missing or invalid authorization token.');
+
+});
+
 test('as array accessible', function () {
     $response = OutputMcpCall::from(outputMcpCall());
 
diff --git a/tests/Responses/Responses/RetrieveResponse.php b/tests/Responses/Responses/RetrieveResponse.php
index 116bc08b..5f32194e 100644
--- a/tests/Responses/Responses/RetrieveResponse.php
+++ b/tests/Responses/Responses/RetrieveResponse.php
@@ -31,7 +31,7 @@
         ->text->toBeInstanceOf(CreateResponseFormat::class)
         ->toolChoice->toBe('auto')
         ->tools->toBeArray()
-        ->tools->toHaveCount(4)
+        ->tools->toHaveCount(5)
         ->topP->toBe(1.0)
         ->truncation->toBe('disabled')
         ->usage->toBeInstanceOf(CreateResponseUsage::class)
diff --git a/tests/Responses/Responses/Tool/RemoteMcpTool.php b/tests/Responses/Responses/Tool/RemoteMcpTool.php
index c1984d50..517cdf0c 100644
--- a/tests/Responses/Responses/Tool/RemoteMcpTool.php
+++ b/tests/Responses/Responses/Tool/RemoteMcpTool.php
@@ -21,6 +21,16 @@
         ->type->toBe('mcp');
 });
 
+test('from connector results', function () {
+    $response = RemoteMcpTool::from(toolConnectorMcp());
+
+    expect($response)
+        ->toBeInstanceOf(RemoteMcpTool::class)
+        ->connectorId->toBe('connector_dropbox')
+        ->serverUrl->toBeNull()
+        ->serverLabel->toBe('Dropbox');
+});
+
 test('from object as require_approval', function () {
     $payload = toolRemoteMcp();
     $payload['require_approval'] = [