diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4ea8ab1600e..c2c697c832b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -75,10 +75,8 @@ jobs:
         env:
           TARGET_BRANCH: "${{ steps.get-target-branch.outputs.target-branch }}"
 
-      # temporary ski : dev agent removed content-type header from traces response
-      # causing lot of trace to be dropped
-      # - name: Get agent artifact
-      #   run: ./utils/scripts/load-binary.sh agent
+      - name: Get agent artifact
+        run: ./utils/scripts/load-binary.sh agent
 
       # ### appsec-event-rules is now a private repo. The GH_TOKEN provided can't read private repos.
       # ### skipping this, waiting for a proper solution
diff --git a/.github/workflows/run-end-to-end.yml b/.github/workflows/run-end-to-end.yml
index 2292eb0a0cf..357485f6771 100644
--- a/.github/workflows/run-end-to-end.yml
+++ b/.github/workflows/run-end-to-end.yml
@@ -138,7 +138,7 @@ jobs:
       if: always() && steps.build.outcome == 'success' && contains(inputs.scenarios, '"IPV6"') && inputs.library != 'ruby'
       run: ./run.sh IPV6
     - name: Run CROSSED_TRACING_LIBRARIES scenario
-      if: always() && steps.build.outcome == 'success' && matrix.weblog != 'python3.12' && matrix.weblog != 'django-py3.13' && (matrix.weblog != 'spring-boot-payara' || inputs.ci_environment != 'prod') && contains(inputs.scenarios, '"CROSSED_TRACING_LIBRARIES"')
+      if: always() && steps.build.outcome == 'success' && matrix.weblog != 'python3.12' && matrix.weblog != 'django-py3.13' && matrix.weblog != 'spring-boot-payara' && contains(inputs.scenarios, '"CROSSED_TRACING_LIBRARIES"')
       # python 3.13 issue : APMAPI-1096
       run: ./run.sh CROSSED_TRACING_LIBRARIES
       env:
diff --git a/tests/test_data_integrity.py b/tests/test_data_integrity.py
index c3057fcc217..9efabab6b89 100644
--- a/tests/test_data_integrity.py
+++ b/tests/test_data_integrity.py
@@ -210,5 +210,17 @@ def validator(data):
         interfaces.library.validate(validator, success_by_default=True)
 
 
+@features.data_integrity
+class Test_Agent:
+    @missing_feature(library="cpp", reason="Trace are not reported")
+    def test_headers(self):
+        """All required headers are present in all requests sent by the agent"""
+        interfaces.library.assert_response_header(
+            path_filters=interfaces.library.trace_paths,
+            header_name_pattern="content-type",
+            header_value_pattern="application/json",
+        )
+
+
 def _empty_request(data):
     return "content" not in data["request"] or not data["request"]["content"]
diff --git a/utils/interfaces/_core.py b/utils/interfaces/_core.py
index ae4e51841ad..6c4034b4509 100644
--- a/utils/interfaces/_core.py
+++ b/utils/interfaces/_core.py
@@ -119,15 +119,17 @@ def load_data_from_logs(self):
     def _append_data(self, data):
         self._data_list.append(data)
 
-    def get_data(self, path_filters=None):
+    def get_data(self, path_filters: list[str] | str | None = None):
         if path_filters is not None:
             if isinstance(path_filters, str):
                 path_filters = [path_filters]
 
-            path_filters = [re.compile(path) for path in path_filters]
+            path_regexes = [re.compile(path) for path in path_filters]
+        else:
+            path_regexes = None
 
         for data in self._data_list:
-            if path_filters is not None and all(path.fullmatch(data["path"]) is None for path in path_filters):
+            if path_regexes is not None and all(path.fullmatch(data["path"]) is None for path in path_regexes):
                 continue
 
             yield data
@@ -207,23 +209,39 @@ def assert_schema_points(self, excluded_points=None):
 
         assert not has_error, f"Schema validation failed for {self.name}"
 
-    def assert_request_header(self, path, header_name_pattern: str, header_value_pattern: str) -> None:
+    def assert_response_header(self, path_filters, header_name_pattern: str, header_value_pattern: str) -> None:
+        """Assert that a header, and its value are present in all requests for a given path
+        header_name_pattern: a regular expression to match the header name (lower case)
+        header_value_pattern: a regular expression to match the header value
+        """
+
+        self._assert_header(path_filters, "response", header_name_pattern, header_value_pattern)
+
+    def assert_request_header(self, path_filters, header_name_pattern: str, header_value_pattern: str) -> None:
         """Assert that a header, and its value are present in all requests for a given path
         header_name_pattern: a regular expression to match the header name (lower case)
         header_value_pattern: a regular expression to match the header value
         """
 
+        self._assert_header(path_filters, "request", header_name_pattern, header_value_pattern)
+
+    def _assert_header(
+        self, path_filters, request_or_response: str, header_name_pattern: str, header_value_pattern: str
+    ) -> None:
         data_found = False
 
-        for data in self.get_data(path):
+        for data in self.get_data(path_filters):
             data_found = True
 
             found = False
 
-            for header, value in data["request"]["headers"]:
+            for header, value in data[request_or_response]["headers"]:
                 if re.fullmatch(header_name_pattern, header.lower()):
                     if not re.fullmatch(header_value_pattern, value):
-                        logger.error(f"Header {header} found in {data['log_filename']}, but value is {value}")
+                        logger.error(
+                            f"{request_or_response} header {header} found in "
+                            f"{data['log_filename']}, but value is {value}"
+                        )
                     else:
                         found = True
                         continue
@@ -232,7 +250,7 @@ def assert_request_header(self, path, header_name_pattern: str, header_value_pat
                 raise ValueError(f"{header_name_pattern} not found (or incorrect) in {data['log_filename']}")
 
         if not data_found:
-            raise ValueError(f"No data found for {path}")
+            raise ValueError(f"No data found for {path_filters}")
 
 
 class ValidationError(Exception):
diff --git a/utils/interfaces/_library/core.py b/utils/interfaces/_library/core.py
index 5a79e41575c..6fece0d323f 100644
--- a/utils/interfaces/_library/core.py
+++ b/utils/interfaces/_library/core.py
@@ -24,6 +24,8 @@
 class LibraryInterfaceValidator(ProxyBasedInterfaceValidator):
     """Validate library/agent interface"""
 
+    trace_paths = ["/v0.4/traces", "/v0.5/traces"]
+
     def __init__(self, name):
         super().__init__(name)
         self.ready = threading.Event()
@@ -47,14 +49,12 @@ def wait_function(data):
 
     ############################################################
     def get_traces(self, request=None):
-        paths = ["/v0.4/traces", "/v0.5/traces"]
-
         rid = get_rid_from_request(request)
 
         if rid:
             logger.debug(f"Try to find traces related to request {rid}")
 
-        for data in self.get_data(path_filters=paths):
+        for data in self.get_data(path_filters=self.trace_paths):
             traces = data["request"]["content"]
             if not traces:  # may be none
                 continue