diff --git a/maubot/management/frontend/src/api.js b/maubot/management/frontend/src/api.js
index dc4bbc0..61fcbd8 100644
--- a/maubot/management/frontend/src/api.js
+++ b/maubot/management/frontend/src/api.js
@@ -14,7 +14,11 @@
 // You should have received a copy of the GNU Affero General Public License
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
-export const BASE_PATH = "/_matrix/maubot/v1"
+var BASE_PATH = "/_matrix/maubot/v1"
+
+export function setBasePath(basePath) {
+    BASE_PATH = basePath
+}
 
 function getHeaders(contentType = "application/json") {
     return {
@@ -241,8 +245,7 @@ export async function doClientAuth(server, type, username, password) {
 }
 
 export default {
-    BASE_PATH,
-    login, ping, getFeatures, remoteGetFeatures,
+    login, ping, setBasePath, getFeatures, remoteGetFeatures,
     openLogSocket,
     debugOpenFile, debugOpenFileEnabled, updateDebugOpenFileEnabled,
     getInstances, getInstance, putInstance, deleteInstance,
diff --git a/maubot/management/frontend/src/pages/Main.js b/maubot/management/frontend/src/pages/Main.js
index 33660d9..3434fe1 100644
--- a/maubot/management/frontend/src/pages/Main.js
+++ b/maubot/management/frontend/src/pages/Main.js
@@ -31,6 +31,7 @@ class Main extends Component {
     }
 
     async componentWillMount() {
+        await this.getBasePath()
         if (localStorage.accessToken) {
             await this.ping()
         } else {
@@ -39,6 +40,21 @@ class Main extends Component {
         this.setState({ pinged: true })
     }
 
+    async getBasePath() {
+        try {
+            const resp = await fetch("./paths.json", {
+                headers: { "Content-Type": "application/json" }
+            })
+            const apiPathJson = await resp.json()
+            const apiPath = apiPathJson.api_path
+            console.log(apiPath)
+            api.setBasePath(`${apiPath}`)
+        } catch (err) {
+            console.error(err)
+        }
+    }
+
+
     async ping() {
         try {
             const username = await api.ping()
diff --git a/maubot/server.py b/maubot/server.py
index fa84e9d..e06307e 100644
--- a/maubot/server.py
+++ b/maubot/server.py
@@ -16,6 +16,8 @@
 from typing import Tuple, Dict
 import logging
 import asyncio
+import json
+from urllib.parse import urlparse
 
 from aiohttp import web, hdrs
 from aiohttp.abc import AbstractAccessLogger
@@ -63,7 +65,8 @@ async def handle_plugin_path(self, request: web.Request) -> web.Response:
 
     def get_instance_subapp(self, instance_id: str) -> Tuple[PluginWebApp, str]:
         subpath = self.config["server.plugin_base_path"] + instance_id
-        url = self.config["server.public_url"] + subpath
+        path_prefix = self.config["server.public_url_path_prefix"].rstrip("/")
+        url = self.config["server.public_url"] + path_prefix + subpath
         try:
             return self.plugin_routes[subpath], url
         except KeyError:
@@ -129,6 +132,22 @@ def setup_static_root_files(self, directory: str, ui_base: str) -> None:
             self.app.router.add_get(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 != "":
+            url_parts = urlparse(public_url)
+            public_url_path = url_parts.path.rstrip("/")
+
+        # assemble with base_path
+        api_path = f"{public_url_path}{base_path}"
+
+        path_prefix_response_body = json.dumps({"api_path": api_path.rstrip("/")})
+        self.app.router.add_get(f"{ui_base}/paths.json", lambda _: web.Response(body=path_prefix_response_body,
+                                                                                content_type="application/json"))
+
     def add_route(self, method: Method, path: PathBuilder, handler) -> None:
         self.app.router.add_route(method.value, str(path), handler)