diff --git a/src/EndpointCollection/OrganizationEndpointCollection.php b/src/EndpointCollection/OrganizationEndpointCollection.php
new file mode 100644
index 00000000..d7e1988a
--- /dev/null
+++ b/src/EndpointCollection/OrganizationEndpointCollection.php
@@ -0,0 +1,41 @@
+<?php
+
+namespace Mollie\Api\EndpointCollection;
+
+use Mollie\Api\Exceptions\ApiException;
+use Mollie\Api\Helpers;
+use Mollie\Api\Http\Requests\GetOrganizationRequest;
+use Mollie\Api\Resources\Organization;
+
+class OrganizationEndpointCollection extends EndpointCollection
+{
+    /**
+     * Retrieve an organization from Mollie.
+     *
+     * Will throw a ApiException if the organization id is invalid or the resource cannot be found.
+     *
+     * @param  array|bool  $testmode
+     *
+     * @throws ApiException
+     */
+    public function get(string $id, $testmode = []): Organization
+    {
+        $testmode = Helpers::extractBool($testmode, 'testmode', false);
+
+        /** @var Organization */
+        return $this->send(new GetOrganizationRequest($id, $testmode));
+    }
+
+    /**
+     * Retrieve the current organization from Mollie.
+     *
+     * @param  array|bool  $testmode
+     *
+     * @throws ApiException
+     */
+    public function current($testmode = []): Organization
+    {
+        /** @var Organization */
+        return $this->get('me', $testmode);
+    }
+}
diff --git a/src/Endpoints/OrganizationEndpoint.php b/src/Endpoints/OrganizationEndpoint.php
deleted file mode 100644
index ea826c88..00000000
--- a/src/Endpoints/OrganizationEndpoint.php
+++ /dev/null
@@ -1,58 +0,0 @@
-<?php
-
-namespace Mollie\Api\Endpoints;
-
-use Mollie\Api\Exceptions\ApiException;
-use Mollie\Api\Resources\Organization;
-
-class OrganizationEndpoint extends RestEndpoint
-{
-    /**
-     * The resource path.
-     *
-     * @var string
-     */
-    protected string $resourcePath = "organizations";
-
-    /**
-     * Resource class name.
-     *
-     * @var string
-     */
-    public static string $resource = Organization::class;
-
-    /**
-     * Retrieve an organization from Mollie.
-     *
-     * Will throw a ApiException if the organization id is invalid or the resource cannot be found.
-     *
-     * @param string $organizationId
-     * @param array $parameters
-     *
-     * @return Organization
-     * @throws ApiException
-     */
-    public function get(string $organizationId, array $parameters = []): Organization
-    {
-        if (empty($organizationId)) {
-            throw new ApiException("Organization ID is empty.");
-        }
-
-        /** @var Organization */
-        return $this->readResource($organizationId, $parameters);
-    }
-
-    /**
-     * Retrieve the current organization from Mollie.
-     *
-     * @param array $parameters
-     *
-     * @return Organization
-     * @throws ApiException
-     */
-    public function current(array $parameters = []): Organization
-    {
-        /** @var Organization */
-        return $this->readResource('me', $parameters);
-    }
-}
diff --git a/src/Exceptions/ApiException.php b/src/Exceptions/ApiException.php
index b4e8b0ec..6b4bbdb4 100644
--- a/src/Exceptions/ApiException.php
+++ b/src/Exceptions/ApiException.php
@@ -2,7 +2,7 @@
 
 namespace Mollie\Api\Exceptions;
 
-use DateTime;
+use DateTimeImmutable;
 use Psr\Http\Message\RequestInterface;
 use Psr\Http\Message\ResponseInterface;
 use Throwable;
@@ -37,9 +37,9 @@ public function __construct(
     ) {
         $this->plainMessage = $message;
 
-        $this->raisedAt = new \DateTimeImmutable;
+        $this->raisedAt = new DateTimeImmutable;
 
-        $formattedRaisedAt = $this->raisedAt->format(DateTime::ATOM);
+        $formattedRaisedAt = $this->raisedAt->format(DateTimeImmutable::ATOM);
         $message = "[{$formattedRaisedAt}] ".$message;
 
         if (! empty($field)) {
@@ -140,7 +140,7 @@ public function getRequest(): ?RequestInterface
     /**
      * Get the ISO8601 representation of the moment this exception was thrown
      */
-    public function getRaisedAt(): \DateTimeImmutable
+    public function getRaisedAt(): DateTimeImmutable
     {
         return $this->raisedAt;
     }
diff --git a/src/Factories/GetBalanceReportQueryFactory.php b/src/Factories/GetBalanceReportQueryFactory.php
index a5c1c0a4..387114e1 100644
--- a/src/Factories/GetBalanceReportQueryFactory.php
+++ b/src/Factories/GetBalanceReportQueryFactory.php
@@ -2,7 +2,7 @@
 
 namespace Mollie\Api\Factories;
 
-use DateTime;
+use DateTimeImmutable;
 use Mollie\Api\Http\Query\GetBalanceReportQuery;
 
 class GetBalanceReportQueryFactory extends Factory
@@ -14,8 +14,8 @@ public function create(): GetBalanceReportQuery
         }
 
         return new GetBalanceReportQuery(
-            DateTime::createFromFormat('Y-m-d', $this->get('from')),
-            DateTime::createFromFormat('Y-m-d', $this->get('until')),
+            DateTimeImmutable::createFromFormat('Y-m-d', $this->get('from')),
+            DateTimeImmutable::createFromFormat('Y-m-d', $this->get('until')),
             $this->get('grouping'),
             $this->get('testmode')
         );
diff --git a/src/Factories/PaymentRouteCollectionFactory.php b/src/Factories/PaymentRouteCollectionFactory.php
index 10bcb665..678714c8 100644
--- a/src/Factories/PaymentRouteCollectionFactory.php
+++ b/src/Factories/PaymentRouteCollectionFactory.php
@@ -2,7 +2,7 @@
 
 namespace Mollie\Api\Factories;
 
-use DateTime;
+use DateTimeImmutable;
 use Mollie\Api\Helpers;
 use Mollie\Api\Helpers\Arr;
 use Mollie\Api\Http\Payload\DataCollection;
@@ -22,7 +22,7 @@ public function create(): DataCollection
                 Arr::get($item, 'destination.organizationId'),
                 Helpers::compose(
                     Arr::get($item, 'delayUntil'),
-                    fn ($value) => DateTime::createFromFormat('Y-m-d', $value)
+                    fn ($value) => DateTimeImmutable::createFromFormat('Y-m-d', $value)
                 )
             );
         }, $this->data);
diff --git a/src/Factories/RecurringBillingCycleFactory.php b/src/Factories/RecurringBillingCycleFactory.php
index 88cb22bb..0c0c9c20 100644
--- a/src/Factories/RecurringBillingCycleFactory.php
+++ b/src/Factories/RecurringBillingCycleFactory.php
@@ -2,7 +2,7 @@
 
 namespace Mollie\Api\Factories;
 
-use DateTime;
+use DateTimeImmutable;
 use Mollie\Api\Http\Payload\RecurringBillingCycle;
 
 class RecurringBillingCycleFactory extends Factory
@@ -14,7 +14,7 @@ public function create(): RecurringBillingCycle
             $this->get('descriptipn'),
             $this->mapIfNotNull('amount', fn (array $item) => MoneyFactory::new($item)->create()),
             $this->get('times'),
-            $this->mapIfNotNull('startDate', fn (string $item) => DateTime::createFromFormat('Y-m-d', $item)),
+            $this->mapIfNotNull('startDate', fn (string $item) => DateTimeImmutable::createFromFormat('Y-m-d', $item)),
         );
     }
 }
diff --git a/src/Helpers/Handler.php b/src/Helpers/Handler.php
index 22ac935b..b5944a64 100644
--- a/src/Helpers/Handler.php
+++ b/src/Helpers/Handler.php
@@ -8,11 +8,14 @@ class Handler
 {
     private Closure $callback;
 
+    private ?string $name;
+
     private string $priority;
 
-    public function __construct(Closure $callback, string $priority)
+    public function __construct(Closure $callback, ?string $name, string $priority)
     {
         $this->callback = $callback;
+        $this->name = $name;
         $this->priority = $priority;
     }
 
@@ -21,6 +24,11 @@ public function callback(): callable
         return $this->callback;
     }
 
+    public function name(): ?string
+    {
+        return $this->name;
+    }
+
     public function priority(): string
     {
         return $this->priority;
diff --git a/src/Helpers/Handlers.php b/src/Helpers/Handlers.php
index 3b40bf7e..c6b4cf5c 100644
--- a/src/Helpers/Handlers.php
+++ b/src/Helpers/Handlers.php
@@ -13,9 +13,18 @@ class Handlers
      */
     protected array $handlers = [];
 
-    public function add(callable $handler, string $priority): void
+    public function add(callable $handler, ?string $name = null, string $priority = MiddlewarePriority::MEDIUM): void
     {
-        $this->handlers[] = new Handler($handler, $priority);
+        if (in_array($name, [MiddlewarePriority::HIGH, MiddlewarePriority::MEDIUM, MiddlewarePriority::LOW])) {
+            $priority = $name;
+            $name = null;
+        }
+
+        if (is_string($name) && $this->handlerExists($name)) {
+            throw new \InvalidArgumentException("Handler with name '{$name}' already exists.");
+        }
+
+        $this->handlers[] = new Handler($handler, $name, $priority);
     }
 
     public function setHandlers(array $handlers): void
@@ -70,4 +79,13 @@ protected function sortHandlers(): array
 
         return array_merge($highPriority, $mediumPriority, $lowPriority);
     }
+
+    private function handlerExists(string $name): bool
+    {
+        foreach ($this->handlers as $handler) {
+            if ($handler->name() === $name) {
+                return true;
+            }
+        }
+    }
 }
diff --git a/src/Helpers/MiddlewareHandlers.php b/src/Helpers/MiddlewareHandlers.php
index 23bf595b..7a7ad5b9 100644
--- a/src/Helpers/MiddlewareHandlers.php
+++ b/src/Helpers/MiddlewareHandlers.php
@@ -18,7 +18,7 @@ public function __construct()
         $this->onResponse = new Handlers;
     }
 
-    public function onRequest(callable $callback, string $priority = MiddlewarePriority::MEDIUM): static
+    public function onRequest(callable $callback, ?string $name = null, string $priority = MiddlewarePriority::MEDIUM): static
     {
         $this->onRequest->add(static function (PendingRequest $pendingRequest) use ($callback): PendingRequest {
             $result = $callback($pendingRequest);
@@ -28,12 +28,12 @@ public function onRequest(callable $callback, string $priority = MiddlewarePrior
             }
 
             return $pendingRequest;
-        }, $priority);
+        }, $name, $priority);
 
         return $this;
     }
 
-    public function onResponse(callable $callback, string $priority = MiddlewarePriority::MEDIUM): static
+    public function onResponse(callable $callback, ?string $name = null, string $priority = MiddlewarePriority::MEDIUM): static
     {
         $this->onResponse->add(static function (Response $response) use ($callback) {
             $result = $callback($response);
@@ -42,7 +42,7 @@ public function onResponse(callable $callback, string $priority = MiddlewarePrio
                 || $result instanceof ViableResponse
                 ? $result
                 : $response;
-        }, $priority);
+        }, $name, $priority);
 
         return $this;
     }
@@ -60,21 +60,27 @@ public function executeOnResponse(Response $response)
         return $this->onResponse->execute($response);
     }
 
-    public function merge(MiddlewareHandlers $handlers): static
+    /**
+     * @param  array<MiddlewareHandlers>  ...$handlers
+     */
+    public function merge(...$handlersCollection): static
     {
-        $onRequestHandlers = array_merge(
-            $this->onRequest->getHandlers(),
-            $handlers->onRequest->getHandlers(),
-        );
-
-        $this->onRequest->setHandlers($onRequestHandlers);
-
-        $onResponseHandlers = array_merge(
-            $this->onResponse->getHandlers(),
-            $handlers->onResponse->getHandlers(),
-        );
-
-        $this->onResponse->setHandlers($onResponseHandlers);
+        /** @var MiddlewareHandlers $handlers */
+        foreach ($handlersCollection as $handlers) {
+            $onRequestHandlers = array_merge(
+                $this->onRequest->getHandlers(),
+                $handlers->onRequest->getHandlers()
+            );
+
+            $this->onRequest->setHandlers($onRequestHandlers);
+
+            $onResponseHandlers = array_merge(
+                $this->onResponse->getHandlers(),
+                $handlers->onResponse->getHandlers()
+            );
+
+            $this->onResponse->setHandlers($onResponseHandlers);
+        }
 
         return $this;
     }
diff --git a/src/Http/Payload/PaymentRoute.php b/src/Http/Payload/PaymentRoute.php
index c8ce012c..0bad63da 100644
--- a/src/Http/Payload/PaymentRoute.php
+++ b/src/Http/Payload/PaymentRoute.php
@@ -2,15 +2,16 @@
 
 namespace Mollie\Api\Http\Payload;
 
-use DateTime;
+use DateTimeInterface;
 
 class PaymentRoute extends DataBag
 {
     public function __construct(
         public readonly Money $amount,
         public readonly string $organizationId,
-        public readonly ?DateTime $delayUntil = null,
-    ) {}
+        public readonly ?DateTimeInterface $delayUntil = null,
+    ) {
+    }
 
     public function data(): array
     {
diff --git a/src/Http/Payload/RecurringBillingCycle.php b/src/Http/Payload/RecurringBillingCycle.php
index 1aa35947..bf19ea4b 100644
--- a/src/Http/Payload/RecurringBillingCycle.php
+++ b/src/Http/Payload/RecurringBillingCycle.php
@@ -2,7 +2,7 @@
 
 namespace Mollie\Api\Http\Payload;
 
-use DateTime;
+use DateTimeInterface;
 use Mollie\Api\Rules\Matches;
 
 class RecurringBillingCycle extends DataBag
@@ -20,14 +20,14 @@ class RecurringBillingCycle extends DataBag
 
     public ?int $times;
 
-    public ?DateTime $startDate;
+    public ?DateTimeInterface $startDate;
 
     public function __construct(
         string $interval,
         ?string $description = null,
         ?Money $amount = null,
         ?int $times = null,
-        ?DateTime $startDate = null,
+        ?DateTimeInterface $startDate = null,
     ) {
         $this->interval = $interval;
         $this->description = $description;
diff --git a/src/Http/PendingRequest.php b/src/Http/PendingRequest.php
index a177132e..c41c8f3d 100644
--- a/src/Http/PendingRequest.php
+++ b/src/Http/PendingRequest.php
@@ -51,7 +51,7 @@ public function __construct(Connector $connector, Request $request)
         $this->method = $request->getMethod();
         $this->url = Url::join($connector->resolveBaseUrl(), $request->resolveResourcePath());
 
-        $this->middleware()->merge($connector->middleware());
+        $this->middleware()->merge($request->middleware(), $connector->middleware());
 
         $this
             ->tap(new MergeRequestProperties)
@@ -62,12 +62,12 @@ public function __construct(Connector $connector, Request $request)
 
         $this
             ->middleware()
-            ->onRequest(new EvaluateHydrationSetting)
-            ->onRequest(new ApplyIdempotencyKey)
-            ->onResponse(new ResetIdempotencyKey)
+            ->onRequest(new EvaluateHydrationSetting, 'hydration')
+            ->onRequest(new ApplyIdempotencyKey, 'idempotency')
+            ->onResponse(new ResetIdempotencyKey, 'idempotency')
             ->onResponse(new GuardResponse, MiddlewarePriority::HIGH)
             ->onResponse(new ThrowExceptionIfRequestFailed, MiddlewarePriority::HIGH)
-            ->onResponse(new Hydrate, MiddlewarePriority::LOW);
+            ->onResponse(new Hydrate, 'hydration', MiddlewarePriority::LOW);
 
     }
 
diff --git a/src/Http/Query/GetBalanceReportQuery.php b/src/Http/Query/GetBalanceReportQuery.php
index 9ac9cb07..36f58928 100644
--- a/src/Http/Query/GetBalanceReportQuery.php
+++ b/src/Http/Query/GetBalanceReportQuery.php
@@ -2,21 +2,21 @@
 
 namespace Mollie\Api\Http\Query;
 
-use DateTime;
+use DateTimeInterface;
 
 class GetBalanceReportQuery extends Query
 {
-    public DateTime $from;
+    public DateTimeInterface $from;
 
-    public DateTime $until;
+    public DateTimeInterface $until;
 
     public ?string $grouping;
 
     public ?bool $testmode;
 
     public function __construct(
-        DateTime $from,
-        DateTime $until,
+        DateTimeInterface $from,
+        DateTimeInterface $until,
         ?string $grouping = null,
         ?bool $testmode = null
     ) {
diff --git a/src/Http/Request.php b/src/Http/Request.php
index 40864661..0ed2015a 100644
--- a/src/Http/Request.php
+++ b/src/Http/Request.php
@@ -4,11 +4,13 @@
 
 use LogicException;
 use Mollie\Api\Contracts\ValidatableDataProvider;
+use Mollie\Api\Traits\HasMiddleware;
 use Mollie\Api\Traits\HasRequestProperties;
 use Mollie\Api\Traits\HasRules;
 
 abstract class Request implements ValidatableDataProvider
 {
+    use HasMiddleware;
     use HasRequestProperties;
     use HasRules;
 
diff --git a/src/Http/Requests/GetOrganizationRequest.php b/src/Http/Requests/GetOrganizationRequest.php
new file mode 100644
index 00000000..b47c5a2b
--- /dev/null
+++ b/src/Http/Requests/GetOrganizationRequest.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Mollie\Api\Http\Requests;
+
+use Mollie\Api\Resources\Organization;
+use Mollie\Api\Types\Method;
+
+class GetOrganizationRequest extends SimpleRequest
+{
+    protected static string $method = Method::GET;
+
+    public static string $targetResourceClass = Organization::class;
+
+    public function resolveResourcePath(): string
+    {
+        return 'organizations';
+    }
+}
diff --git a/src/MollieApiClient.php b/src/MollieApiClient.php
index 4815b17e..d67622de 100644
--- a/src/MollieApiClient.php
+++ b/src/MollieApiClient.php
@@ -13,6 +13,7 @@
 use Mollie\Api\EndpointCollection\ClientLinkEndpointCollection;
 use Mollie\Api\EndpointCollection\CustomerEndpointCollection;
 use Mollie\Api\EndpointCollection\OrderEndpointCollection;
+use Mollie\Api\EndpointCollection\OrganizationEndpointCollection;
 use Mollie\Api\EndpointCollection\PaymentEndpointCollection;
 use Mollie\Api\EndpointCollection\PaymentRefundEndpointCollection;
 use Mollie\Api\Endpoints\CustomerPaymentsEndpoint;
@@ -25,7 +26,6 @@
 use Mollie\Api\Endpoints\OrderPaymentEndpoint;
 use Mollie\Api\Endpoints\OrderRefundEndpoint;
 use Mollie\Api\Endpoints\OrderShipmentEndpoint;
-use Mollie\Api\Endpoints\OrganizationEndpoint;
 use Mollie\Api\Endpoints\OrganizationPartnerEndpoint;
 use Mollie\Api\Endpoints\PaymentCaptureEndpoint;
 use Mollie\Api\Endpoints\PaymentChargebackEndpoint;
@@ -78,7 +78,7 @@
  * @property OrderLineEndpoint $orderLines
  * @property OrderPaymentEndpoint $orderPayments
  * @property OrderRefundEndpoint $orderRefunds
- * @property OrganizationEndpoint $organizations
+ * @property OrganizationEndpointCollection $organizations
  * @property OrganizationPartnerEndpoint $organizationPartners
  * @property PaymentEndpointCollection $payments
  * @property PaymentCaptureEndpoint $paymentCaptures
diff --git a/src/Resources/Organization.php b/src/Resources/Organization.php
index 209f9e3a..60187c04 100644
--- a/src/Resources/Organization.php
+++ b/src/Resources/Organization.php
@@ -4,6 +4,11 @@
 
 class Organization extends BaseResource
 {
+    /**
+     * Resource id prefix. Used to validate resource id's.
+     */
+    public static string $resourceIdPrefix = 'org_';
+
     /**
      * Id of the payment method.
      *
diff --git a/src/Traits/HasEndpoints.php b/src/Traits/HasEndpoints.php
index 05c686d6..0b29072b 100644
--- a/src/Traits/HasEndpoints.php
+++ b/src/Traits/HasEndpoints.php
@@ -8,6 +8,7 @@
 use Mollie\Api\EndpointCollection\ClientLinkEndpointCollection;
 use Mollie\Api\EndpointCollection\CustomerEndpointCollection;
 use Mollie\Api\EndpointCollection\OrderEndpointCollection;
+use Mollie\Api\EndpointCollection\OrganizationEndpointCollection;
 use Mollie\Api\EndpointCollection\PaymentEndpointCollection;
 use Mollie\Api\EndpointCollection\PaymentRefundEndpointCollection;
 use Mollie\Api\Endpoints\CustomerPaymentsEndpoint;
@@ -20,7 +21,6 @@
 use Mollie\Api\Endpoints\OrderPaymentEndpoint;
 use Mollie\Api\Endpoints\OrderRefundEndpoint;
 use Mollie\Api\Endpoints\OrderShipmentEndpoint;
-use Mollie\Api\Endpoints\OrganizationEndpoint;
 use Mollie\Api\Endpoints\OrganizationPartnerEndpoint;
 use Mollie\Api\Endpoints\PaymentCaptureEndpoint;
 use Mollie\Api\Endpoints\PaymentChargebackEndpoint;
@@ -77,7 +77,7 @@ protected function initializeHasEndpoints(): void
             'orderRefunds' => OrderRefundEndpoint::class,
             'orders' => OrderEndpointCollection::class,
             'organizationPartners' => OrganizationPartnerEndpoint::class,
-            'organizations' => OrganizationEndpoint::class,
+            'organizations' => OrganizationEndpointCollection::class,
             'payments' => PaymentEndpointCollection::class,
             'paymentRefunds' => PaymentRefundEndpointCollection::class,
             'paymentCaptures' => PaymentCaptureEndpoint::class,