diff --git a/irs-edc-client/src/main/java/org/eclipse/tractusx/irs/edc/client/contract/service/EdcContractAgreementService.java b/irs-edc-client/src/main/java/org/eclipse/tractusx/irs/edc/client/contract/service/EdcContractAgreementService.java
index a04fbdf1a5..57f7210bce 100644
--- a/irs-edc-client/src/main/java/org/eclipse/tractusx/irs/edc/client/contract/service/EdcContractAgreementService.java
+++ b/irs-edc-client/src/main/java/org/eclipse/tractusx/irs/edc/client/contract/service/EdcContractAgreementService.java
@@ -33,6 +33,10 @@
 import org.eclipse.tractusx.irs.edc.client.contract.model.EdcContractAgreementsResponse;
 import org.eclipse.tractusx.irs.edc.client.contract.model.exception.ContractAgreementException;
 import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.http.HttpEntity;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Service;
 import org.springframework.web.client.RestTemplate;
@@ -57,9 +61,9 @@ public List<ContractAgreement> getContractAgreements(final String... contractAgr
 
         final EndpointConfig endpoint = config.getControlplane().getEndpoint();
         final String contractAgreements = endpoint.getContractAgreements();
-        final ResponseEntity<EdcContractAgreementsResponse> edcContractAgreementListResponseEntity = edcRestTemplate.postForEntity(
-                endpoint.getData() + contractAgreements + EDC_REQUEST_SUFFIX, querySpec,
-                EdcContractAgreementsResponse.class);
+        final ResponseEntity<EdcContractAgreementsResponse> edcContractAgreementListResponseEntity = edcRestTemplate.exchange(
+                endpoint.getData() + contractAgreements + EDC_REQUEST_SUFFIX, HttpMethod.POST,
+                new HttpEntity<>(querySpec, headers()), EdcContractAgreementsResponse.class);
 
         final EdcContractAgreementsResponse contractAgreementListWrapper = edcContractAgreementListResponseEntity.getBody();
         if (contractAgreementListWrapper != null) {
@@ -74,8 +78,9 @@ public List<ContractAgreement> getContractAgreements(final String... contractAgr
     public ContractNegotiation getContractAgreementNegotiation(final String contractAgreementId) {
         final EndpointConfig endpoint = config.getControlplane().getEndpoint();
         final String contractAgreements = endpoint.getContractAgreements();
-        final ResponseEntity<ContractNegotiation> contractNegotiationResponseEntity = edcRestTemplate.getForEntity(
-                endpoint.getData() + contractAgreements + "/" + contractAgreementId + "/negotiation", ContractNegotiation.class);
+        final ResponseEntity<ContractNegotiation> contractNegotiationResponseEntity = edcRestTemplate.exchange(
+                endpoint.getData() + contractAgreements + "/" + contractAgreementId + "/negotiation", HttpMethod.GET,
+                new HttpEntity<>(headers()), ContractNegotiation.class);
         return contractNegotiationResponseEntity.getBody();
     }
 
@@ -91,4 +96,15 @@ private QuerySpec buildQuerySpec(final String... contractAgreementIds) {
         return QuerySpec.Builder.newInstance().filter(criterionList).build();
     }
 
+    private HttpHeaders headers() {
+        final HttpHeaders headers = new HttpHeaders();
+        headers.setAccept(List.of(MediaType.APPLICATION_JSON));
+        headers.setContentType(MediaType.APPLICATION_JSON);
+        final String apiKeyHeader = config.getControlplane().getApiKey().getHeader();
+        if (apiKeyHeader != null) {
+            headers.add(apiKeyHeader, config.getControlplane().getApiKey().getSecret());
+        }
+        return headers;
+    }
+
 }
diff --git a/irs-edc-client/src/test/java/org/eclipse/tractusx/irs/edc/client/contract/service/EdcContractAgreementServiceTest.java b/irs-edc-client/src/test/java/org/eclipse/tractusx/irs/edc/client/contract/service/EdcContractAgreementServiceTest.java
index ab0eea1fd0..1445f0b31e 100644
--- a/irs-edc-client/src/test/java/org/eclipse/tractusx/irs/edc/client/contract/service/EdcContractAgreementServiceTest.java
+++ b/irs-edc-client/src/test/java/org/eclipse/tractusx/irs/edc/client/contract/service/EdcContractAgreementServiceTest.java
@@ -38,11 +38,11 @@
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
-import org.mockito.Answers;
 import org.mockito.Mock;
 import org.mockito.Mockito;
 import org.mockito.Spy;
 import org.mockito.junit.jupiter.MockitoExtension;
+import org.springframework.http.HttpMethod;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.client.RestTemplate;
 
@@ -59,7 +59,9 @@ class EdcContractAgreementServiceTest {
     @BeforeEach
     void setUp() {
         edcConfiguration.getControlplane().setEndpoint(new EdcConfiguration.ControlplaneConfig.EndpointConfig());
-        edcConfiguration.getControlplane().getEndpoint().setData("https://irs-consumer-controlplane.dev.demo.net/data/management");
+        edcConfiguration.getControlplane()
+                        .getEndpoint()
+                        .setData("https://irs-consumer-controlplane.dev.demo.net/data/management");
         edcConfiguration.getControlplane().getEndpoint().setContractAgreements("/v2/contractagreements");
         this.edcContractAgreementService = new EdcContractAgreementService(edcConfiguration, restTemplate);
     }
@@ -79,10 +81,10 @@ void shouldReturnContractAgreements() throws ContractAgreementException {
                                                                              .build();
         final EdcContractAgreementsResponse edcContractAgreementsResponse = EdcContractAgreementsResponse.builder()
                                                                                                          .contractAgreementList(
-                                                                                                                       List.of(contractAgreement))
+                                                                                                                 List.of(contractAgreement))
                                                                                                          .build();
-        when(restTemplate.postForEntity(anyString(), any(), eq(EdcContractAgreementsResponse.class))).thenReturn(
-                ResponseEntity.ok(edcContractAgreementsResponse));
+        when(restTemplate.exchange(anyString(), eq(HttpMethod.POST), any(),
+                eq(EdcContractAgreementsResponse.class))).thenReturn(ResponseEntity.ok(edcContractAgreementsResponse));
 
         //WHEN
         final List<ContractAgreement> contractAgreements = edcContractAgreementService.getContractAgreements(
@@ -90,8 +92,9 @@ void shouldReturnContractAgreements() throws ContractAgreementException {
 
         //THEN
         Mockito.verify(restTemplate)
-               .postForEntity(eq("https://irs-consumer-controlplane.dev.demo.net/data/management/v2/contractagreements/request"), any(),
-                       eq(EdcContractAgreementsResponse.class));
+               .exchange(
+                       eq("https://irs-consumer-controlplane.dev.demo.net/data/management/v2/contractagreements/request"),
+                       any(), any(), eq(EdcContractAgreementsResponse.class));
         assertNotNull(contractAgreements);
     }
 
@@ -100,7 +103,7 @@ void shouldThrowContractAgreementExceptionWhenResponseBodyIsEmtpy() {
         //GIVEN
         String[] contractAgreementIds = { "contractAgreementId" };
 
-        when(restTemplate.postForEntity(anyString(), any(), eq(EdcContractAgreementsResponse.class))).thenReturn(
+        when(restTemplate.exchange(anyString(), any(), any(), eq(EdcContractAgreementsResponse.class))).thenReturn(
                 ResponseEntity.ok().build());
 
         //WHEN
@@ -109,8 +112,9 @@ void shouldThrowContractAgreementExceptionWhenResponseBodyIsEmtpy() {
 
         //THEN
         Mockito.verify(restTemplate)
-               .postForEntity(eq("https://irs-consumer-controlplane.dev.demo.net/data/management/v2/contractagreements/request"), any(),
-                       eq(EdcContractAgreementsResponse.class));
+               .exchange(
+                       eq("https://irs-consumer-controlplane.dev.demo.net/data/management/v2/contractagreements/request"),
+                       any(), any(), eq(EdcContractAgreementsResponse.class));
         assertEquals("Empty message body on edc response: <200 OK OK,[]>", contractAgreementException.getMessage());
     }
 
@@ -125,7 +129,7 @@ void shouldReturnContractAgreementNegotiation() {
                                                                                                 .counterPartyAddress("")
                                                                                                 .protocol("")
                                                                                                 .build();
-        when(restTemplate.getForEntity(anyString(), eq(ContractNegotiation.class))).thenReturn(
+        when(restTemplate.exchange(anyString(), any(), any(), eq(ContractNegotiation.class))).thenReturn(
                 ResponseEntity.ok(contractAgreementNegotiationMock));
 
         //WHEN
@@ -134,8 +138,9 @@ void shouldReturnContractAgreementNegotiation() {
 
         //THEN
         Mockito.verify(restTemplate)
-               .getForEntity("https://irs-consumer-controlplane.dev.demo.net/data/management/v2/contractagreements/contractAgreementId/negotiation",
-                       ContractNegotiation.class);
+               .exchange(
+                       eq("https://irs-consumer-controlplane.dev.demo.net/data/management/v2/contractagreements/contractAgreementId/negotiation"),
+                       any(), any(), eq(ContractNegotiation.class));
         assertNotNull(contractAgreementNegotiation);
     }
 }
\ No newline at end of file