diff --git a/src/Api/Monetization/Controller/AcceptedRatePlanController.php b/src/Api/Monetization/Controller/AcceptedRatePlanController.php
index e9634c17..b40c89f7 100644
--- a/src/Api/Monetization/Controller/AcceptedRatePlanController.php
+++ b/src/Api/Monetization/Controller/AcceptedRatePlanController.php
@@ -72,14 +72,6 @@ public function getPaginatedAcceptedRatePlanList(int $limit = null, int $page =
         return $this->getAcceptedRatePlans($query_params);
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function getAllEligibleRatePlans(): array
-    {
-        return $this->getEligibleRatePlan();
-    }
-
     /**
      * {@inheritdoc}
      */
@@ -156,17 +148,6 @@ abstract protected function buildContextForEntityTransformerInCreate(): array;
      */
     abstract protected function getAcceptedRatePlansEndpoint(): UriInterface;
 
-    /**
-     * Returns the URI for listing rate plans eligible to access.
-     *
-     * Gets the API products that a company is eligible to access, including:
-     * API products for which a company has accepted a rate plan.
-     * API products that do not have a published rate plan.
-     *
-     * @return \Psr\Http\Message\UriInterface
-     */
-    abstract protected function getEligibleRatePlanEndpoint(): UriInterface;
-
     /**
      * Allows to alter payload before it gets sent to the API.
      *
@@ -203,31 +184,4 @@ private function getAcceptedRatePlans(array $query_params = []): array
 
         return $entities;
     }
-
-    /**
-     * Helper function for listing eligible rate plans.
-     *
-     * @param array $query_params
-     *   Additional query parameters.
-     *
-     * @return \Apigee\Edge\Api\Monetization\Entity\AcceptedRatePlanInterface[]
-     *
-     * @psalm-suppress PossiblyNullArrayOffset - id() does not return null here.
-     */
-    private function getEligibleRatePlan(): array
-    {
-        $entities = [];
-
-        foreach ($this->getRawList($this->getEligibleRatePlanEndpoint()) as $item) {
-            /** @var \Apigee\Edge\Entity\EntityInterface $tmp */
-            $tmp = $this->getEntitySerializer()->denormalize(
-                $item,
-                AcceptedRatePlanInterface::class,
-                'json'
-            );
-            $entities[$tmp->id()] = $tmp;
-        }
-
-        return $entities;
-    }
 }
diff --git a/src/Api/Monetization/Controller/AcceptedRatePlanControllerInterface.php b/src/Api/Monetization/Controller/AcceptedRatePlanControllerInterface.php
index c119e956..4f976761 100644
--- a/src/Api/Monetization/Controller/AcceptedRatePlanControllerInterface.php
+++ b/src/Api/Monetization/Controller/AcceptedRatePlanControllerInterface.php
@@ -41,13 +41,6 @@ interface AcceptedRatePlanControllerInterface extends EntityControllerInterface,
      */
     public function getAllAcceptedRatePlans(): array;
 
-    /**
-     * Gets all eligible rate plans.
-     *
-     * @return \Apigee\Edge\Api\Monetization\Entity\AcceptedRatePlanInterface[]
-     */
-    public function getAllEligibleRatePlans(): array;
-
     /**
      * Gets accepted rate plans in the provided range.
      *
diff --git a/src/Api/Monetization/Controller/CompanyEligibleRatePlanController.php b/src/Api/Monetization/Controller/CompanyEligibleRatePlanController.php
index fbb60358..b40c421f 100644
--- a/src/Api/Monetization/Controller/CompanyEligibleRatePlanController.php
+++ b/src/Api/Monetization/Controller/CompanyEligibleRatePlanController.php
@@ -1,7 +1,7 @@
 <?php
 
 /*
- * Copyright 2018 Google LLC
+ * Copyright 2024 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,11 +18,13 @@
 
 namespace Apigee\Edge\Api\Monetization\Controller;
 
+use Apigee\Edge\Api\Monetization\Entity\CompanyEligibleRatePlan;
+use Apigee\Edge\Api\Monetization\Normalizer\EntityNormalizer;
 use Apigee\Edge\ClientInterface;
 use Apigee\Edge\Serializer\EntitySerializerInterface;
 use Psr\Http\Message\UriInterface;
 
-class CompanyEligibleRatePlanController extends AcceptedRatePlanController
+class CompanyEligibleRatePlanController extends EligibleRatePlanController
 {
     /**
      * Name of the company.
@@ -53,6 +55,25 @@ protected function getBaseEndpointUri(): UriInterface
         return $this->client->getUriFactory()->createUri("/mint/organizations/{$this->organization}/companies/{$this->companyName}/eligible-products");
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    protected function getEntityClass(): string
+    {
+        return CompanyEligibleRatePlan::class;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function buildContextForEntityTransformerInCreate(): array
+    {
+        $context = [];
+        $context[EntityNormalizer::MINT_ENTITY_REFERENCE_PROPERTY_VALUES]['developer'] = $this->companyName;
+
+        return $context;
+    }
+
     /**
      * {@inheritdoc}
      */
diff --git a/src/Api/Monetization/Controller/EligibleRatePlanController.php b/src/Api/Monetization/Controller/EligibleRatePlanController.php
new file mode 100644
index 00000000..bff33eda
--- /dev/null
+++ b/src/Api/Monetization/Controller/EligibleRatePlanController.php
@@ -0,0 +1,171 @@
+<?php
+
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+namespace Apigee\Edge\Api\Monetization\Controller;
+
+use Apigee\Edge\Api\Monetization\Entity\AcceptedRatePlanInterface;
+use Apigee\Edge\Api\Monetization\Entity\RatePlanInterface;
+use Apigee\Edge\Api\Monetization\Serializer\AcceptedRatePlanSerializer;
+use Apigee\Edge\ClientInterface;
+use Apigee\Edge\Controller\EntityListingControllerTrait;
+use Apigee\Edge\Controller\EntityLoadOperationControllerTrait;
+use Apigee\Edge\Serializer\EntitySerializerInterface;
+use DateTimeImmutable;
+use Psr\Http\Message\UriInterface;
+use ReflectionClass;
+
+abstract class EligibleRatePlanController extends OrganizationAwareEntityController implements EligibleRatePlanControllerInterface
+{
+    use EntityListingControllerTrait;
+    use EntityLoadOperationControllerTrait;
+    use PaginatedListingHelperTrait;
+
+    /**
+     * EligibleRatePlanController constructor.
+     *
+     * @param string $organization
+     * @param \Apigee\Edge\ClientInterface $client
+     * @param \Apigee\Edge\Serializer\EntitySerializerInterface|null $entitySerializer
+     */
+    public function __construct(string $organization, ClientInterface $client, ?EntitySerializerInterface $entitySerializer = null)
+    {
+        $entitySerializer = $entitySerializer ?? new AcceptedRatePlanSerializer();
+        parent::__construct($organization, $client, $entitySerializer);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getAllEligibleRatePlans(): array
+    {
+        return $this->getEligibleRatePlan();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function acceptRatePlan(RatePlanInterface $ratePlan, DateTimeImmutable $startDate, ?DateTimeImmutable $endDate = null, ?int $quotaTarget = null, ?bool $suppressWarning = null, ?bool $waveTerminationCharge = null): AcceptedRatePlanInterface
+    {
+        $rc = new ReflectionClass($this->getEntityClass());
+        /** @var \Apigee\Edge\Api\Monetization\Entity\AcceptedRatePlanInterface $acceptedRatePlan */
+        $acceptedRatePlan = $rc->newInstance(
+            [
+                'ratePlan' => $ratePlan,
+                'startDate' => $startDate,
+            ]
+        );
+        if (null !== $quotaTarget) {
+            $acceptedRatePlan->setQuotaTarget($quotaTarget);
+        }
+        if (null !== $endDate) {
+            $acceptedRatePlan->setEndDate($endDate);
+        }
+        $payload = $this->getEntitySerializer()->serialize($acceptedRatePlan, 'json', $this->buildContextForEntityTransformerInCreate());
+        $tmp = json_decode($payload, true);
+        if (null !== $suppressWarning) {
+            $tmp['suppressWarning'] = $suppressWarning ? 'true' : 'false';
+        }
+        if (null !== $waveTerminationCharge) {
+            $tmp['waveTerminationCharge'] = $waveTerminationCharge ? 'true' : 'false';
+        }
+        $payload = json_encode($tmp);
+        $response = $this->client->post($this->getBaseEndpointUri(), $payload);
+        $this->getEntitySerializer()->setPropertiesFromResponse($response, $acceptedRatePlan);
+
+        return $acceptedRatePlan;
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * @psalm-suppress PossiblyNullArgument - id is not null in this context.
+     */
+    public function updateSubscription(AcceptedRatePlanInterface $acceptedRatePlan, ?bool $suppressWarning = null, ?bool $waveTerminationCharge = null): void
+    {
+        $payload = $this->getEntitySerializer()->serialize($acceptedRatePlan, 'json', $this->buildContextForEntityTransformerInCreate());
+        $tmp = json_decode($payload, true);
+        if (null !== $suppressWarning) {
+            $tmp['suppressWarning'] = $suppressWarning ? 'true' : 'false';
+        }
+        if (null !== $waveTerminationCharge) {
+            $tmp['waveTerminationCharge'] = $waveTerminationCharge ? 'true' : 'false';
+        }
+        $this->alterRequestPayload($tmp, $acceptedRatePlan);
+        $payload = json_encode($tmp);
+        // Update an existing entity.
+        $response = $this->client->put($this->getEntityEndpointUri($acceptedRatePlan->id()), $payload);
+        $this->getEntitySerializer()->setPropertiesFromResponse($response, $acceptedRatePlan);
+    }
+
+    /**
+     * Returns the URI for listing rate plans eligible to access.
+     *
+     * Gets the API products that a company is eligible to access, including:
+     * API products for which a company has accepted a rate plan.
+     * API products that do not have a published rate plan.
+     *
+     * @return \Psr\Http\Message\UriInterface
+     */
+    abstract protected function getEligibleRatePlanEndpoint(): UriInterface;
+
+    /**
+     * Builds context for the entity normalizer.
+     *
+     * Allows controllers to add extra metadata to the payload.
+     *
+     * @return array
+     */
+    abstract protected function buildContextForEntityTransformerInCreate(): array;
+
+    /**
+     * Allows to alter payload before it gets sent to the API.
+     *
+     * @param array $payload
+     *   API request payload.
+     */
+    protected function alterRequestPayload(array &$payload, AcceptedRatePlanInterface $acceptedRatePlan): void
+    {
+    }
+
+    /**
+     * Helper function for listing eligible rate plans.
+     *
+     * @param array $query_params
+     *   Additional query parameters.
+     *
+     * @return \Apigee\Edge\Api\Monetization\Entity\AcceptedRatePlanInterface[]
+     *
+     * @psalm-suppress PossiblyNullArrayOffset - id() does not return null here.
+     */
+    private function getEligibleRatePlan(): array
+    {
+        $entities = [];
+
+        foreach ($this->getRawList($this->getEligibleRatePlanEndpoint()) as $item) {
+            /** @var \Apigee\Edge\Entity\EntityInterface $tmp */
+            $tmp = $this->getEntitySerializer()->denormalize(
+                $item,
+                AcceptedRatePlanInterface::class,
+                'json'
+            );
+            $entities[$tmp->id()] = $tmp;
+        }
+
+        return $entities;
+    }
+}
diff --git a/src/Api/Monetization/Controller/EligibleRatePlanControllerInterface.php b/src/Api/Monetization/Controller/EligibleRatePlanControllerInterface.php
new file mode 100644
index 00000000..e871133b
--- /dev/null
+++ b/src/Api/Monetization/Controller/EligibleRatePlanControllerInterface.php
@@ -0,0 +1,82 @@
+<?php
+
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+namespace Apigee\Edge\Api\Monetization\Controller;
+
+use Apigee\Edge\Api\Monetization\Entity\AcceptedRatePlanInterface;
+use Apigee\Edge\Api\Monetization\Entity\RatePlanInterface;
+use Apigee\Edge\Controller\EntityControllerInterface;
+use Apigee\Edge\Controller\EntityLoadOperationControllerInterface;
+use DateTimeImmutable;
+
+/**
+ * Interface EligibleRatePlanControllerInterface.
+ *
+ * @see https://apidocs.apigee.com/monetize/apis/
+ * @see https://docs.apigee.com/api-platform/monetization/subscribe-published-rate-plan-using-api
+ * @see https://docs.apigee.com/api-platform/monetization/view-rate-plans#viewingrateplansusingtheapi-viewingallacceptedrateplansforadeveloperusingtheapi
+ */
+interface EligibleRatePlanControllerInterface extends EntityControllerInterface,
+    EntityLoadOperationControllerInterface
+{
+    /**
+     * Gets all eligible rate plans.
+     *
+     * @return \Apigee\Edge\Api\Monetization\Entity\AcceptedRatePlanInterface[]
+     */
+    public function getAllEligibleRatePlans(): array;
+
+    /**
+     * Accepts a rate plan.
+     *
+     * @param \Apigee\Edge\Api\Monetization\Entity\RatePlanInterface $ratePlan
+     *   The rate plan to be accepted.
+     * @param \DateTimeImmutable $startDate
+     *   Date when the rate plan starts.
+     * @param \DateTimeImmutable|null $endDate
+     *   Date when the rate plan ends.
+     * @param int|null $quotaTarget
+     *   (This property is valid for adjustable notification rate plans only.)
+     *   Target number of transactions allowed for the app developer.
+     * @param bool|null $suppressWarning
+     *   Flag that specifies whether to suppress the error if the developer
+     *   attempts to accept a rate plan that overlaps another accepted
+     *   rate plan.
+     * @param bool|null $waveTerminationCharge
+     *   Flag that specifies whether termination fees are waved when an active
+     *   rate plan is terminated as part of activating the new rate plan.
+     *
+     * @return \Apigee\Edge\Api\Monetization\Entity\AcceptedRatePlanInterface
+     */
+    public function acceptRatePlan(RatePlanInterface $ratePlan, DateTimeImmutable $startDate, ?DateTimeImmutable $endDate = null, ?int $quotaTarget = null, ?bool $suppressWarning = null, ?bool $waveTerminationCharge = null): AcceptedRatePlanInterface;
+
+    /**
+     * Update a rate plan that has been accepted by a developer.
+     *
+     * @param \Apigee\Edge\Api\Monetization\Entity\AcceptedRatePlanInterface $acceptedRatePlan
+     *   Previously accepted rate plan that should be modified.
+     * @param bool|null $suppressWarning
+     *   Flag that specifies whether to suppress the error if the developer
+     *   attempts to accept a rate plan that overlaps another accepted
+     *   rate plan.
+     * @param bool|null $waveTerminationCharge
+     *   Flag that specifies whether termination fees are waved when an active
+     *   rate plan is terminated as part of activating the new rate plan.
+     */
+    public function updateSubscription(AcceptedRatePlanInterface $acceptedRatePlan, ?bool $suppressWarning = null, ?bool $waveTerminationCharge = null): void;
+}
diff --git a/src/Api/Monetization/Denormalizer/CompanyEligibleRatePlanDenormalizer.php b/src/Api/Monetization/Denormalizer/CompanyEligibleRatePlanDenormalizer.php
index 7d871744..2f8a644b 100644
--- a/src/Api/Monetization/Denormalizer/CompanyEligibleRatePlanDenormalizer.php
+++ b/src/Api/Monetization/Denormalizer/CompanyEligibleRatePlanDenormalizer.php
@@ -1,5 +1,21 @@
 <?php
 
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 namespace Apigee\Edge\Api\Monetization\Denormalizer;
 
 use Apigee\Edge\Api\Monetization\Entity\CompanyEligibleRatePlan;
diff --git a/src/Api/Monetization/Entity/CompanyEligibleRatePlan.php b/src/Api/Monetization/Entity/CompanyEligibleRatePlan.php
index 507c7187..fdfa194b 100644
--- a/src/Api/Monetization/Entity/CompanyEligibleRatePlan.php
+++ b/src/Api/Monetization/Entity/CompanyEligibleRatePlan.php
@@ -1,5 +1,21 @@
 <?php
 
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 namespace Apigee\Edge\Api\Monetization\Entity;
 
 use Apigee\Edge\Api\Monetization\Entity\Property\CompanyPropertyAwareTrait;
diff --git a/src/Api/Monetization/Entity/CompanyEligibleRatePlanInterface.php b/src/Api/Monetization/Entity/CompanyEligibleRatePlanInterface.php
index 72dc74a1..b446c734 100644
--- a/src/Api/Monetization/Entity/CompanyEligibleRatePlanInterface.php
+++ b/src/Api/Monetization/Entity/CompanyEligibleRatePlanInterface.php
@@ -1,5 +1,21 @@
 <?php
 
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 namespace Apigee\Edge\Api\Monetization\Entity;
 
 use Apigee\Edge\Api\Monetization\Entity\Property\CompanyPropertyInterface;
diff --git a/src/Api/Monetization/NameConverter/CompanyEligibleRatePlanNameConverter.php b/src/Api/Monetization/NameConverter/CompanyEligibleRatePlanNameConverter.php
index 4e050782..594dcde4 100644
--- a/src/Api/Monetization/NameConverter/CompanyEligibleRatePlanNameConverter.php
+++ b/src/Api/Monetization/NameConverter/CompanyEligibleRatePlanNameConverter.php
@@ -1,5 +1,21 @@
 <?php
 
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 namespace Apigee\Edge\Api\Monetization\NameConverter;
 
 use Symfony\Component\Serializer\NameConverter\NameConverterInterface;
diff --git a/src/Api/Monetization/Normalizer/CompanyEligibleRatePlanNormalizer.php b/src/Api/Monetization/Normalizer/CompanyEligibleRatePlanNormalizer.php
index 6984c1bb..91d47865 100644
--- a/src/Api/Monetization/Normalizer/CompanyEligibleRatePlanNormalizer.php
+++ b/src/Api/Monetization/Normalizer/CompanyEligibleRatePlanNormalizer.php
@@ -1,5 +1,21 @@
 <?php
 
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 namespace Apigee\Edge\Api\Monetization\Normalizer;
 
 use Apigee\Edge\Api\Monetization\Entity\CompanyEligibleRatePlanInterface;