diff --git a/maubot/config.py b/maubot/config.py
index e11fe1c..c5368cd 100644
--- a/maubot/config.py
+++ b/maubot/config.py
@@ -52,11 +52,9 @@ class Config(BaseFileConfig):
         copy("server.port")
         copy("server.public_url")
         copy("server.listen")
-        copy("server.base_path")
         copy("server.ui_base_path")
         copy("server.plugin_base_path")
         copy("server.override_resource_path")
-        copy("server.appservice_base_path")
         shared_secret = self["server.unshared_secret"]
         if shared_secret is None or shared_secret == "generate":
             base["server.unshared_secret"] = self._new_token()
diff --git a/maubot/example-config.yaml b/maubot/example-config.yaml
index d157269..0181846 100644
--- a/maubot/example-config.yaml
+++ b/maubot/example-config.yaml
@@ -55,8 +55,6 @@ server:
     port: 29316
     # Public base URL where the server is visible.
     public_url: https://example.com
-    # The base management API path.
-    base_path: /_matrix/maubot/v1
     # The base path for the UI.
     ui_base_path: /_matrix/maubot
     # The base path for plugin endpoints. The instance ID will be appended directly.
@@ -64,8 +62,6 @@ server:
     # Override path from where to load UI resources.
     # Set to false to using pkg_resources to find the path.
     override_resource_path: false
-    # The base appservice API path. Use / for legacy appservice API and /_matrix/app/v1 for v1.
-    appservice_base_path: /_matrix/app/v1
     # The shared secret to sign API access tokens.
     # Set to "generate" to generate and save a new token at startup.
     unshared_secret: generate
diff --git a/maubot/management/api/client_auth.py b/maubot/management/api/client_auth.py
index f630931..4e5e201 100644
--- a/maubot/management/api/client_auth.py
+++ b/maubot/management/api/client_auth.py
@@ -184,8 +184,7 @@ async def _do_sso(req: AuthRequestInfo) -> web.Response:
     cfg = get_config()
     public_url = (
         URL(cfg["server.public_url"])
-        / cfg["server.base_path"].lstrip("/")
-        / "client/auth_external_sso/complete"
+        / "_matrix/maubot/v1/client/auth_external_sso/complete"
         / waiter_id
     )
     sso_url = req.client.api.base_url.with_path(str(Path.v3.login.sso.redirect)).with_query(
diff --git a/maubot/management/api/middleware.py b/maubot/management/api/middleware.py
index 0ecb681..17141fa 100644
--- a/maubot/management/api/middleware.py
+++ b/maubot/management/api/middleware.py
@@ -29,7 +29,7 @@ log = logging.getLogger("maubot.server")
 
 @web.middleware
 async def auth(request: web.Request, handler: Handler) -> web.Response:
-    subpath = request.path[len(get_config()["server.base_path"]) :]
+    subpath = request.path[len("/_matrix/maubot/v1") :]
     if (
         subpath.startswith("/auth/")
         or subpath.startswith("/client/auth_external_sso/complete/")
diff --git a/maubot/management/frontend/src/pages/Main.js b/maubot/management/frontend/src/pages/Main.js
index fb650b6..5ee374e 100644
--- a/maubot/management/frontend/src/pages/Main.js
+++ b/maubot/management/frontend/src/pages/Main.js
@@ -45,9 +45,8 @@ class Main extends Component {
             const resp = await fetch(process.env.PUBLIC_URL + "/paths.json", {
                 headers: { "Content-Type": "application/json" },
             })
-            const apiPathJson = await resp.json()
-            const apiPath = apiPathJson.api_path
-            api.setBasePath(`${apiPath}`)
+            const apiPaths = await resp.json()
+            api.setBasePath(apiPaths.api_path)
         } catch (err) {
             console.error("Failed to get API path:", err)
         }
diff --git a/maubot/server.py b/maubot/server.py
index d70ae7e..ac3132d 100644
--- a/maubot/server.py
+++ b/maubot/server.py
@@ -52,7 +52,7 @@ class MaubotServer:
         self.config = config
 
         self.setup_appservice()
-        self.app.add_subapp(config["server.base_path"], management_api)
+        self.app.add_subapp("/_matrix/maubot/v1", management_api)
         self.setup_instance_subapps()
         self.setup_management_ui()
 
@@ -93,7 +93,7 @@ class MaubotServer:
         self.app.router.register_resource(resource)
 
     def setup_appservice(self) -> None:
-        as_path = PathBuilder(self.config["server.appservice_base_path"])
+        as_path = PathBuilder("/_matrix/appservice/v1")
         self.add_route(Method.PUT, as_path.transactions, self.handle_transaction)
 
     def setup_management_ui(self) -> None:
@@ -140,16 +140,12 @@ class MaubotServer:
                 f"{ui_base}/{file}", lambda _: web.Response(body=data, content_type=mime)
             )
 
-        # also set up a resource path for the public url path prefix config
-        # cut the prefix path from public_url
         public_url = self.config["server.public_url"]
-        base_path = self.config["server.base_path"]
         public_url_path = ""
         if public_url:
             public_url_path = URL(public_url).path.rstrip("/")
 
-        # assemble with base_path
-        api_path = f"{public_url_path}{base_path}"
+        api_path = f"{public_url_path}/_matrix/maubot/v1"
 
         path_prefix_response_body = json.dumps({"api_path": api_path.rstrip("/")})
         self.app.router.add_get(