diff --git a/src/ApiResource/Project/RewardClaimApiResource.php b/src/ApiResource/Project/RewardClaimApiResource.php
index 153eabb..f9c1d38 100644
--- a/src/ApiResource/Project/RewardClaimApiResource.php
+++ b/src/ApiResource/Project/RewardClaimApiResource.php
@@ -6,8 +6,8 @@
 use ApiPlatform\Metadata as API;
 use App\ApiResource\User\UserApiResource;
 use App\Entity\Project\RewardClaim;
-use App\State\ApiResourceStateProcessor;
 use App\State\ApiResourceStateProvider;
+use App\State\Project\RewardClaimStateProcessor;
 use Symfony\Component\Validator\Constraints as Assert;
 
 /**
@@ -17,7 +17,7 @@
     shortName: 'ProjectRewardClaim',
     stateOptions: new Options(entityClass: RewardClaim::class),
     provider: ApiResourceStateProvider::class,
-    processor: ApiResourceStateProcessor::class
+    processor: RewardClaimStateProcessor::class
 )]
 class RewardClaimApiResource
 {
diff --git a/src/Entity/Project/RewardClaim.php b/src/Entity/Project/RewardClaim.php
index 4dc14fd..1da5454 100644
--- a/src/Entity/Project/RewardClaim.php
+++ b/src/Entity/Project/RewardClaim.php
@@ -4,9 +4,12 @@
 
 use App\Entity\Interface\UserOwnedInterface;
 use App\Entity\User\User;
+use App\Mapping\Provider\EntityMapProvider;
 use App\Repository\Project\RewardClaimRepository;
+use AutoMapper\Attribute\MapProvider;
 use Doctrine\ORM\Mapping as ORM;
 
+#[MapProvider(EntityMapProvider::class)]
 #[ORM\Entity(repositoryClass: RewardClaimRepository::class)]
 class RewardClaim implements UserOwnedInterface
 {
diff --git a/src/Service/Project/RewardService.php b/src/Service/Project/RewardService.php
new file mode 100644
index 0000000..1db9240
--- /dev/null
+++ b/src/Service/Project/RewardService.php
@@ -0,0 +1,36 @@
+<?php
+
+namespace App\Service\Project;
+
+use App\Entity\Project\Reward;
+use App\Entity\Project\RewardClaim;
+
+class RewardService
+{
+    /**
+     * Processes a RewardClaim for the set Reward
+     * 
+     * @param Reward $reward The Reward being claimed
+     * 
+     * @return RewardClaim The processed RewardClaim with updated Reward
+     */
+    public function processClaim(RewardClaim $claim): RewardClaim
+    {
+        $reward = $claim->getReward();
+
+        if (!$reward->hasUnits()) {
+            return $claim;
+        }
+
+        $available = $reward->getUnitsAvailable();
+
+        if ($available < 1) {
+            throw new \Exception("The claimed Reward has no units available");
+        }
+
+        $reward->addClaim($claim);
+        $reward->setUnitsAvailable($available - 1);
+
+        return $claim->setReward($reward);
+    }
+}
diff --git a/src/State/Project/RewardClaimStateProcessor.php b/src/State/Project/RewardClaimStateProcessor.php
new file mode 100644
index 0000000..d3c5a94
--- /dev/null
+++ b/src/State/Project/RewardClaimStateProcessor.php
@@ -0,0 +1,49 @@
+<?php
+
+namespace App\State\Project;
+
+use ApiPlatform\Metadata\Operation;
+use ApiPlatform\State\ProcessorInterface;
+use App\ApiResource\Project\RewardClaimApiResource;
+use App\Entity\Project\RewardClaim;
+use App\Mapping\AutoMapper;
+use App\Service\Auth\AuthService;
+use App\Service\Project\RewardService;
+use App\State\EntityStateProcessor;
+use Symfony\Component\Security\Core\Exception\AuthenticationException;
+
+class RewardClaimStateProcessor implements ProcessorInterface
+{
+    public function __construct(
+        private EntityStateProcessor $entityStateProcessor,
+        private AutoMapper $autoMapper,
+        private AuthService $authService,
+        private RewardService $rewardService,
+    ) {}
+
+    /**
+     * @param RewardClaimApiResource $data
+     *
+     * @return RewardClaimApiResource|null
+     */
+    public function process(mixed $data, Operation $operation, array $uriVariables = [], array $context = [])
+    {
+        /** @var RewardClaim */
+        $claim = $this->autoMapper->map($data, RewardClaim::class);
+
+        if (!$claim->getId()) {
+            $owner = $this->authService->getUser();
+
+            if (!$owner) {
+                throw new AuthenticationException();
+            }
+
+            $claim->setOwner($owner);
+        }
+
+        $claim = $this->rewardService->processClaim($claim);
+        $claim = $this->entityStateProcessor->process($claim, $operation, $uriVariables, $context);
+
+        return $this->autoMapper->map($claim, $data);
+    }
+}