diff --git a/gns3server/api/operation_ids.py b/gns3server/api/operation_ids.py
new file mode 100644
index 000000000..ae8c9a2ae
--- /dev/null
+++ b/gns3server/api/operation_ids.py
@@ -0,0 +1,55 @@
+#!/usr/bin/env python
+#
+# Copyright (C) 2026 GNS3 Technologies Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see .
+
+"""
+Readable and unique OpenAPI operationIds.
+"""
+
+import re
+from typing import Callable
+
+from fastapi import APIRouter
+from fastapi.routing import APIRoute
+
+STUB_METHODS = ("GET", "POST", "DELETE", "PATCH", "PUT")
+
+
+def _slug(value: str) -> str:
+
+ return re.sub(r"[^a-z0-9]+", "_", value.lower()).strip("_")
+
+
+def generate_operation_id(route: APIRoute) -> str:
+ """
+ Builds an operationId such as "nodes_get_node" from the first tag and the route name.
+ """
+
+ name = _slug(route.name)
+ if route.tags:
+ tag = _slug(str(route.tags[0]))
+ if tag:
+ return f"{tag}_{name}"
+ return name
+
+
+def add_stub_routes(router: APIRouter, endpoint: Callable, name: str) -> None:
+ """
+ Registers a catch-all route per HTTP method so that every method gets its own operationId.
+ """
+
+ for method in STUB_METHODS:
+ router.add_api_route("/{path:path}", endpoint, methods=[method], name=f"{name}_{method.lower()}")
diff --git a/gns3server/api/routes/compute/__init__.py b/gns3server/api/routes/compute/__init__.py
index f7815f408..8e48ee48d 100644
--- a/gns3server/api/routes/compute/__init__.py
+++ b/gns3server/api/routes/compute/__init__.py
@@ -21,6 +21,7 @@ from fastapi import Depends, FastAPI, Request
from fastapi.responses import JSONResponse
from starlette.exceptions import HTTPException as StarletteHTTPException
+from gns3server.api.operation_ids import generate_operation_id
from gns3server.compute.compute_error import (
ComputeError,
ComputeForbiddenError,
@@ -61,6 +62,7 @@ log = logging.getLogger(__name__)
compute_api = FastAPI(
title="GNS3 compute API",
description="This page describes the private compute API for GNS3. PLEASE DO NOT USE DIRECTLY!",
+ generate_unique_id_function=generate_operation_id,
version=__api_version__,
servers=[{"url": "/v3/compute"}],
)
diff --git a/gns3server/api/routes/controller/__init__.py b/gns3server/api/routes/controller/__init__.py
index 49e1b65cb..9ebf5a2df 100644
--- a/gns3server/api/routes/controller/__init__.py
+++ b/gns3server/api/routes/controller/__init__.py
@@ -18,6 +18,7 @@ from fastapi import APIRouter, Depends, HTTPException, status
# Check AI Copilot availability
from gns3server.agent import AI_COPILOT_AVAILABLE
+from gns3server.api.operation_ids import add_stub_routes
from gns3server.config import Config
# Conditionally import AI-dependent routes
@@ -44,6 +45,10 @@ else:
detail="AI Copilot is not available. Install AI dependencies with: pip install gns3-server[ai-features]",
)
+ add_stub_routes(_chat_router, ai_not_available, "chat_not_available")
+ add_stub_routes(_copilot_router, ai_not_available, "copilot_not_available")
+ add_stub_routes(_llm_router, ai_not_available, "llm_not_available")
+
from . import (
acl,
diff --git a/gns3server/api/server.py b/gns3server/api/server.py
index ad7c56675..63da932a6 100644
--- a/gns3server/api/server.py
+++ b/gns3server/api/server.py
@@ -37,6 +37,7 @@ from uvicorn.main import Server as UvicornServer
# MCP is an optional feature — import only if dependencies are installed
from gns3server.agent import MCP_AVAILABLE
from gns3server.api.errors import customize_openapi_errors, error_response
+from gns3server.api.operation_ids import add_stub_routes, generate_operation_id
from gns3server.api.routes import controller, index
from gns3server.api.routes.compute import compute_api
from gns3server.config import Config
@@ -68,6 +69,8 @@ else:
detail="MCP is not available. Install AI dependencies with: pip install gns3-server[ai-features]",
)
+ add_stub_routes(_mcp_router, mcp_not_available, "not_available")
+
import logging
@@ -91,6 +94,7 @@ def get_application() -> FastAPI:
servers=[{"url": "/"}],
docs_url=None,
redoc_url=None,
+ generate_unique_id_function=generate_operation_id,
)
application.add_middleware(
diff --git a/tests/api/routes/test_operation_ids.py b/tests/api/routes/test_operation_ids.py
new file mode 100644
index 000000000..26a0905ea
--- /dev/null
+++ b/tests/api/routes/test_operation_ids.py
@@ -0,0 +1,83 @@
+#!/usr/bin/env python
+#
+# Copyright (C) 2026 GNS3 Technologies Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see .
+
+import re
+import warnings
+from collections import Counter
+
+import pytest
+from fastapi import APIRouter, FastAPI
+from fastapi.openapi.utils import get_openapi
+
+from gns3server.api.operation_ids import STUB_METHODS, add_stub_routes, generate_operation_id
+from gns3server.api.routes.compute import compute_api
+from gns3server.api.server import app as controller_app
+
+HTTP_METHODS = ("get", "put", "post", "delete", "options", "head", "patch", "trace")
+
+
+def build_operation_ids(application: FastAPI) -> list[str]:
+
+ with warnings.catch_warnings():
+ warnings.simplefilter("error")
+ spec = get_openapi(title="test", version="0", routes=application.routes)
+ return [
+ operation["operationId"]
+ for path_item in spec["paths"].values()
+ for method, operation in path_item.items()
+ if method in HTTP_METHODS
+ ]
+
+
+@pytest.mark.parametrize("application", [controller_app, compute_api], ids=["controller", "compute"])
+def test_operation_ids_are_unique_and_readable(application: FastAPI) -> None:
+
+ operation_ids = build_operation_ids(application)
+ assert operation_ids
+ duplicates = [operation_id for operation_id, count in Counter(operation_ids).items() if count > 1]
+ assert duplicates == []
+ invalid = [operation_id for operation_id in operation_ids if not re.fullmatch(r"[a-z0-9_]+", operation_id)]
+ assert invalid == []
+
+
+def test_operation_id_uses_first_tag_and_function_name() -> None:
+
+ router = APIRouter()
+
+ @router.get("/nodes/{node_id}", tags=["Compute nodes", "Other"])
+ async def get_node(node_id: str):
+ return {}
+
+ @router.get("/untagged")
+ async def list_untagged():
+ return {}
+
+ assert generate_operation_id(router.routes[0]) == "compute_nodes_get_node"
+ assert generate_operation_id(router.routes[1]) == "list_untagged"
+
+
+def test_stub_routes_get_one_operation_id_per_method() -> None:
+
+ async def not_available(path: str = ""):
+ return {}
+
+ application = FastAPI(generate_unique_id_function=generate_operation_id)
+ router = APIRouter(tags=["Stub"])
+ add_stub_routes(router, not_available, "stub")
+ application.include_router(router, prefix="/stub")
+
+ assert sorted(build_operation_ids(application)) == sorted(f"stub_stub_{method.lower()}" for method in STUB_METHODS)