diff --git a/docs/api/examples/controller_get_templateidbaseconfig.txt b/docs/api/examples/controller_get_templateidbaseconfig.txt
new file mode 100644
index 000000000..9e3d9c25c
--- /dev/null
+++ b/docs/api/examples/controller_get_templateidbaseconfig.txt
@@ -0,0 +1,17 @@
+curl -i -X 'http://localhost:3080/v2/templates/19021f99-e36f-394d-b4a1-8aaa902ab9cc/base-config/vpcs_base_config.txt'
+
+GET /v2/templates/19021f99-e36f-394d-b4a1-8aaa902ab9cc/base-config/vpcs_base_config.txt  HTTP/1.1
+
+HTTP/1.1 200 OK
+Connection: close
+X-Route: /v2/templates/{template_id}/base-config/{filename}
+Server: Python/3.14 GNS3/2.2.60.dev1+713dbb7f
+Content-Type: application/json
+Content-Length: 144
+Date: Mon, 18 May 2026 18:34:10 GMT
+
+{
+  "content": "# test config\n\ndhcp\n",
+  "filename": "vpcs_base_config.txt",
+  "template_id": "19021f99-e36f-394d-b4a1-8aaa902ab9cc"
+}
\ No newline at end of file
diff --git a/docs/api/examples/controller_get_templatesbaseconfigs.txt b/docs/api/examples/controller_get_templatesbaseconfigs.txt
new file mode 100644
index 000000000..263cbfa1f
--- /dev/null
+++ b/docs/api/examples/controller_get_templatesbaseconfigs.txt
@@ -0,0 +1,44 @@
+curl -i -X 'http://localhost:3080/v2/templates/base-configs'
+
+GET /v2/templates/base-configs HTTP/1.1
+
+HTTP/1.1 200 OK
+Connection: close
+X-Route: /v2/templates/base-configs
+Server: Python/3.14 GNS3/2.2.60.dev1+713dbb7f
+Content-Type: application/json
+Content-Length: 576
+Date: Mon, 18 May 2026 18:28:53 GMT
+
+[
+  {
+    "filename": "config1.txt"
+  },
+  {
+    "filename": "config2.txt"
+  },
+  {
+    "filename": "ios_base_startup-config.txt"
+  },
+  {
+    "filename": "ios_etherswitch_startup-config.txt"
+  },
+  {
+    "filename": "iou_l2_base_startup-config.txt"
+  },
+  {
+    "filename": "iou_l3_base_startup-config.txt"
+  },
+  {
+    "filename": "test_config.txt"
+  },
+  {
+    "filename": "update_test.txt"
+  },
+  {
+    "filename": "vpcs_base_config.txt"
+  },
+  {
+    "filename": "vpcs_base_config2.txt"
+  }
+]
\ No newline at end of file
diff --git a/docs/api/examples/controller_put_templateidbaseconfig.txt b/docs/api/examples/controller_put_templateidbaseconfig.txt
new file mode 100644
index 000000000..c70e315b8
--- /dev/null
+++ b/docs/api/examples/controller_put_templateidbaseconfig.txt
@@ -0,0 +1,17 @@
+curl -i -X 'http://localhost:3080/v2/templates/19021f99-e36f-394d-b4a1-8aaa902ab9cc/base-config/vpcs_base_config.txt'
+
+PUT /v2/templates/19021f99-e36f-394d-b4a1-8aaa902ab9cc/base-config/vpcs_base_config.txt HTTP/1.1
+
+HTTP/1.1 200 OK
+Connection: close
+X-Route: /v2/templates/{template_id}/base-config/{filename}
+Server: Python/3.14 GNS3/2.2.60.dev1+713dbb7f
+Content-Type: application/json
+Content-Length: 144
+Date: Mon, 18 May 2026 18:37:57 GMT
+
+{
+  "content": "# test config\n\ndhcp\n",
+  "filename": "vpcs_base_config.txt",
+  "template_id": "19021f99-e36f-394d-b4a1-8aaa902ab9cc"
+}
\ No newline at end of file
diff --git a/docs/api/v2/controller/template/templatesbaseconfigs.rst b/docs/api/v2/controller/template/templatesbaseconfigs.rst
new file mode 100644
index 000000000..dc4de3e8c
--- /dev/null
+++ b/docs/api/v2/controller/template/templatesbaseconfigs.rst
@@ -0,0 +1,38 @@
+GET /v2/templates/base-configs
+------------------------------------------------------------------------------------------------------------------------------------------
+
+.. contents::
+
+GET /v2/templates/base-configs
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+List all available base configuration files
+
+Response status codes
+**********************
+- **200**: List of base configuration files returned
+
+Output
+*******
+
+.. raw:: html
+
+    <table>
+    <tr>
+        <th>Name</th>
+        <th>Type</th>
+        <th>Description</th>
+    </tr>
+
+    <tr>
+        <td>filename</td>
+        <td>string</td>
+        <td>Name of the base configuration file</td>
+    </tr>
+
+    </table>
+
+Sample session
+***************
+
+.. literalinclude:: ../../../examples/controller_get_templatesbaseconfigs.txt
\ No newline at end of file
diff --git a/docs/api/v2/controller/template/templatestemplateidbaseconfigfilename.rst b/docs/api/v2/controller/template/templatestemplateidbaseconfigfilename.rst
new file mode 100644
index 000000000..98b356270
--- /dev/null
+++ b/docs/api/v2/controller/template/templatestemplateidbaseconfigfilename.rst
@@ -0,0 +1,90 @@
+/v2/templates/{template_id}/base-config/{filename}
+------------------------------------------------------------------------------------------------------------------------------------------
+
+.. contents::
+
+GET /v2/templates/**{template_id}**/base-configs/**{filename}**
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+List all available base configuration files
+
+Response status codes
+**********************
+- **200**: List of base configuration files returned
+
+Output
+*******
+
+.. raw:: html
+
+    <table>
+    <tr>
+        <th>Name</th>
+        <th>Type</th>
+        <th>Description</th>
+    </tr>
+
+    <tr>
+        <td>filename</td>
+        <td>string</td>
+        <td>Name of the base configuration file</td>
+    </tr>
+
+    </table>
+
+Sample session
+***************
+
+.. literalinclude:: ../../../examples/controller_get_templateidbaseconfig.txt
+
+
+PUT /v2/templates/**{template_id}**/base-config/**{filename}**
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Update base configuration file content
+
+Response status codes
+**********************
+- **200**: File updated
+- **404**: File not found
+
+Input
+*******
+
+.. raw:: html
+
+    <table>
+    <tr>
+        <th>Name</th>
+        <th>Mandatory</th>
+        <th>Type</th>
+        <th>Description</th>
+    </tr>
+
+    <tr><td>content</td><td>&#10004;</td><td>string</td><td>New file content</td></tr>
+
+    </table>
+
+Output
+*******
+
+.. raw:: html
+
+    <table>
+    <tr>
+        <th>Name</th>
+        <th>Mandatory</th>
+        <th>Type</th>
+        <th>Description</th>
+    </tr>
+
+    <tr><td>template_id</td><td>&#10004;</td><td>string</td><td>Template UUID</td></tr>
+    <tr><td>filename</td><td>&#10004;</td><td>string</td><td>Base configuration filename</td></tr>
+    <tr><td>content</td><td>&#10004;</td><td>string</td><td>Updated file content</td></tr>
+
+    </table>
+
+Sample session
+***************
+
+.. literalinclude:: ../../../examples/controller_put_templateidbaseconfig.txt
\ No newline at end of file
diff --git a/gns3server/handlers/api/controller/template_handler.py b/gns3server/handlers/api/controller/template_handler.py
index 277349429..278782276 100644
--- a/gns3server/handlers/api/controller/template_handler.py
+++ b/gns3server/handlers/api/controller/template_handler.py
@@ -22,6 +22,7 @@ from gns3server.schemas.template import TEMPLATE_USAGE_SCHEMA
 
 import hashlib
 import json
+import os
 
 from gns3server.schemas.template import (
     TEMPLATE_OBJECT_SCHEMA,
@@ -173,3 +174,131 @@ class TemplateHandler:
                                                     compute_id=request.json.get("compute_id"))
         response.set_status(201)
         response.json(node)
+
+    @Route.get(
+        r"/templates/{template_id}/base-config/{filename}",
+        description="Get base configuration file content",
+    )
+    def get_base_config(request, response):
+
+        controller = Controller.instance()
+
+        template_id = request.match_info["template_id"]
+
+        template = controller.template_manager.get_template(template_id)
+
+        filename = os.path.basename(request.match_info["filename"])
+
+        path = os.path.join(controller.configs_path(), filename)
+
+        try:
+            if not os.path.exists(path):
+                response.set_status(404)
+                response.json({"message": "File not found"})
+                return
+
+            with open(path, encoding="utf-8", errors="ignore") as f:
+                content = f.read()
+
+        except Exception as e:
+            response.set_status(500)
+            response.json({"message": str(e)})
+            return
+
+        response.set_status(200)
+        response.json({
+            "template_id": template.id,
+            "filename": filename,
+            "content": content
+        })
+
+    @Route.put(
+        r"/templates/{template_id}/base-config/{filename}",
+        description="Update base configuration file content",
+        parameters={
+            "template_id": "Template UUID",
+            "filename": "Base config filename"
+        },
+        status_codes={
+            200: "File updated",
+            400: "Invalid request",
+            404: "Template or file not found"
+        },
+    )
+    def update_base_config(request, response):
+
+        controller = Controller.instance()
+
+        template_id = request.match_info["template_id"]
+        filename = os.path.basename(request.match_info["filename"])
+
+        try:
+            template = controller.template_manager.get_template(template_id)
+        except Exception:
+            response.set_status(404)
+            response.json({"message": "Template not found"})
+            return
+
+        path = os.path.join(controller.configs_path(), filename)
+
+        body = request.json
+
+        if not body or "content" not in body:
+            response.set_status(400)
+            response.json({"message": "Missing 'content' field"})
+            return
+
+        content = body["content"]
+
+        try:
+            os.makedirs(controller.configs_path(), exist_ok=True)
+
+            with open(path, "w", encoding="utf-8") as f:
+                f.write(content)
+
+        except OSError as e:
+            response.set_status(500)
+            response.json({"message": str(e)})
+            return
+
+        response.set_status(200)
+        response.json({
+            "template_id": template.id,
+            "filename": filename,
+            "content": content
+        })
+
+    @Route.get(
+        r"/templates/base-configs",
+        description="List all available base configuration files",
+        status_codes={
+            200: "List of base configuration files returned"
+        }
+    )
+    def list_base_configs(request, response):
+
+        controller = Controller.instance()
+
+        configs_path = controller.configs_path()
+
+        try:
+            files = []
+
+            if os.path.exists(configs_path):
+                for filename in os.listdir(configs_path):
+
+                    path = os.path.join(configs_path, filename)
+
+                    if os.path.isfile(path):
+                        files.append({"filename": filename})
+
+        except OSError as e:
+            response.set_status(500)
+            response.json({
+                "message": str(e)
+            })
+            return
+
+        files = sorted(files, key=lambda x: x["filename"])
+        response.set_status(200)
+        response.json(files)
diff --git a/tests/handlers/api/controller/test_template.py b/tests/handlers/api/controller/test_template.py
index 2accbffde..610b7da4b 100644
--- a/tests/handlers/api/controller/test_template.py
+++ b/tests/handlers/api/controller/test_template.py
@@ -14,8 +14,7 @@
 #
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-
+import os
 import uuid
 
 from tests.utils import asyncio_patch
@@ -955,3 +954,81 @@ async def test_create_node_from_template(controller_api, controller, project):
     mock.assert_called_with(id, x=42, y=12, name=None, compute_id=None)
     assert response.route == "/projects/{project_id}/templates/{template_id}"
     assert response.status == 201
+
+
+async def test_get_base_config(controller_api, controller):
+
+    template_id = str(uuid.uuid4())
+
+    controller.template_manager._templates[template_id] = Template(template_id, {
+        "template_type": "vpcs",
+        "category": 0,
+        "name": "test",
+        "symbol": "guest.svg",
+        "default_name_format": "{name}-{0}",
+        "compute_id": "local"
+    })
+
+    config_path = os.path.join(controller.configs_path(), "test_config.txt")
+
+    with open(config_path, "w") as f:
+        f.write("hello config")
+
+    response = await controller_api.get(
+        f"/templates/{template_id}/base-config/test_config.txt"
+    )
+
+    assert response.status == 200
+    assert response.json["filename"] == "test_config.txt"
+    assert response.json["content"] == "hello config"
+
+async def test_update_base_config(controller_api, controller):
+
+    template_id = str(uuid.uuid4())
+
+    controller.template_manager._templates[template_id] = Template(template_id, {
+        "template_type": "vpcs",
+        "category": 0,
+        "name": "test",
+        "symbol": "guest.svg",
+        "default_name_format": "{name}-{0}",
+        "compute_id": "local"
+    })
+
+    config_path = os.path.join(controller.configs_path(), "update_test.txt")
+
+    with open(config_path, "w") as f:
+        f.write("old content")
+
+    response = await controller_api.put(
+        f"/templates/{template_id}/base-config/update_test.txt",
+        {
+            "content": "new updated content"
+        }
+    )
+
+    assert response.status == 200
+    assert response.json["content"] == "new updated content"
+
+    with open(config_path) as f:
+        assert f.read() == "new updated content"
+
+async def test_list_base_configs(controller_api, controller):
+
+    config1 = os.path.join(controller.configs_path(), "config1.txt")
+    config2 = os.path.join(controller.configs_path(), "config2.txt")
+
+    with open(config1, "w") as f:
+        f.write("test1")
+
+    with open(config2, "w") as f:
+        f.write("test2")
+
+    response = await controller_api.get("/templates/base-configs")
+
+    assert response.status == 200
+
+    filenames = [item["filename"] for item in response.json]
+
+    assert "config1.txt" in filenames
+    assert "config2.txt" in filenames
\ No newline at end of file