diff --git a/API.md b/API.md
index 61fc65566..0c119b5f6 100644
--- a/API.md
+++ b/API.md
@@ -518,6 +518,7 @@ Get all available addons.
   "icon": "bool",
   "logo": "bool",
   "changelog": "bool",
+  "documentation": "bool",
   "hassio_api": "bool",
   "hassio_role": "default|homeassistant|manager|admin",
   "homeassistant_api": "bool",
@@ -551,6 +552,8 @@ Get all available addons.
 
 - GET `/addons/{addon}/changelog`
 
+- GET `/addons/{addon}/documentation`
+
 - POST `/addons/{addon}/options`
 
 ```json
diff --git a/hassio/addons/model.py b/hassio/addons/model.py
index 6cc799b44..faf8a8c17 100644
--- a/hassio/addons/model.py
+++ b/hassio/addons/model.py
@@ -405,6 +405,11 @@ class AddonModel(CoreSysAttributes):
         """Return True if a changelog exists."""
         return self.path_changelog.exists()
 
+    @property
+    def with_documentation(self) -> bool:
+        """Return True if a documentation exists."""
+        return self.path_documentation.exists()
+
     @property
     def supported_arch(self) -> List[str]:
         """Return list of supported arch."""
@@ -455,6 +460,11 @@ class AddonModel(CoreSysAttributes):
         """Return path to add-on changelog."""
         return Path(self.path_location, "CHANGELOG.md")
 
+    @property
+    def path_documentation(self) -> Path:
+        """Return path to add-on changelog."""
+        return Path(self.path_location, "DOCS.md")
+
     @property
     def path_apparmor(self) -> Path:
         """Return path to custom AppArmor profile."""
diff --git a/hassio/api/__init__.py b/hassio/api/__init__.py
index 864fd5419..34af475f2 100644
--- a/hassio/api/__init__.py
+++ b/hassio/api/__init__.py
@@ -201,6 +201,7 @@ class RestAPI(CoreSysAttributes):
                 web.get("/addons/{addon}/icon", api_addons.icon),
                 web.get("/addons/{addon}/logo", api_addons.logo),
                 web.get("/addons/{addon}/changelog", api_addons.changelog),
+                web.get("/addons/{addon}/documentation", api_addons.documentation),
                 web.post("/addons/{addon}/stdin", api_addons.stdin),
                 web.post("/addons/{addon}/security", api_addons.security),
                 web.get("/addons/{addon}/stats", api_addons.stats),
diff --git a/hassio/api/addons.py b/hassio/api/addons.py
index 18c7a5be3..01d0ead33 100644
--- a/hassio/api/addons.py
+++ b/hassio/api/addons.py
@@ -7,7 +7,6 @@ from aiohttp import web
 import voluptuous as vol
 
 from ..addons import AnyAddon
-from ..docker.stats import DockerStats
 from ..addons.utils import rating_security
 from ..const import (
     ATTR_ADDONS,
@@ -32,6 +31,7 @@ from ..const import (
     ATTR_DISCOVERY,
     ATTR_DNS,
     ATTR_DOCKER_API,
+    ATTR_DOCUMENTATION,
     ATTR_FULL_ACCESS,
     ATTR_GPIO,
     ATTR_HASSIO_API,
@@ -89,8 +89,9 @@ from ..const import (
     STATE_NONE,
 )
 from ..coresys import CoreSysAttributes
+from ..docker.stats import DockerStats
 from ..exceptions import APIError
-from ..validate import alsa_device, DOCKER_PORTS
+from ..validate import DOCKER_PORTS, alsa_device
 from .utils import api_process, api_process_raw, api_validate
 
 _LOGGER: logging.Logger = logging.getLogger(__name__)
@@ -217,6 +218,7 @@ class APIAddons(CoreSysAttributes):
             ATTR_ICON: addon.with_icon,
             ATTR_LOGO: addon.with_logo,
             ATTR_CHANGELOG: addon.with_changelog,
+            ATTR_DOCUMENTATION: addon.with_documentation,
             ATTR_STDIN: addon.with_stdin,
             ATTR_WEBUI: None,
             ATTR_HASSIO_API: addon.access_hassio_api,
@@ -407,6 +409,16 @@ class APIAddons(CoreSysAttributes):
         with addon.path_changelog.open("r") as changelog:
             return changelog.read()
 
+    @api_process_raw(CONTENT_TYPE_TEXT)
+    async def documentation(self, request: web.Request) -> str:
+        """Return documentation from add-on."""
+        addon: AnyAddon = self._extract_addon(request, check_installed=False)
+        if not addon.with_documentation:
+            raise APIError("No documentation found!")
+
+        with addon.path_documentation.open("r") as documentation:
+            return documentation.read()
+
     @api_process
     async def stdin(self, request: web.Request) -> None:
         """Write to stdin of add-on."""
diff --git a/hassio/const.py b/hassio/const.py
index 43d9d0cba..ab0ac20c5 100644
--- a/hassio/const.py
+++ b/hassio/const.py
@@ -222,6 +222,7 @@ ATTR_LOCALS = "locals"
 ATTR_UDEV = "udev"
 ATTR_VALUE = "value"
 ATTR_SNAPSHOT_EXCLUDE = "snapshot_exclude"
+ATTR_DOCUMENTATION = "documentation"
 
 PROVIDE_SERVICE = "provide"
 NEED_SERVICE = "need"