diff --git a/aurweb/routers/rpc.py b/aurweb/routers/rpc.py
index 66376067..942f4e9d 100644
--- a/aurweb/routers/rpc.py
+++ b/aurweb/routers/rpc.py
@@ -12,7 +12,7 @@ from fastapi.responses import JSONResponse
 
 from aurweb import defaults
 from aurweb.ratelimit import check_ratelimit
-from aurweb.rpc import RPC
+from aurweb.rpc import RPC, documentation
 
 router = APIRouter()
 
@@ -74,6 +74,9 @@ async def rpc(request: Request,
               args: Optional[List[str]] = Query(default=[], alias="arg[]"),
               callback: Optional[str] = Query(default=None)):
 
+    if not request.url.query:
+        return documentation()
+
     # Create a handle to our RPC class.
     rpc = RPC(version=v, type=type)
 
diff --git a/aurweb/rpc.py b/aurweb/rpc.py
index 7bdae638..30fd2fbd 100644
--- a/aurweb/rpc.py
+++ b/aurweb/rpc.py
@@ -1,6 +1,9 @@
+import os
+
 from collections import defaultdict
 from typing import Any, Callable, Dict, List, NewType, Union
 
+from fastapi.responses import HTMLResponse
 from sqlalchemy import and_, literal
 
 import aurweb.config as config
@@ -23,6 +26,18 @@ DataGenerator = NewType("DataGenerator",
                         Callable[[models.Package], Dict[str, Any]])
 
 
+def documentation():
+    aurwebdir = config.get("options", "aurwebdir")
+    rpc_doc = os.path.join(aurwebdir, "doc", "rpc.html")
+
+    if not os.path.exists(rpc_doc):
+        raise OSError("doc/rpc.html could not be read")
+
+    with open(rpc_doc) as f:
+        data = f.read()
+    return HTMLResponse(data)
+
+
 class RPC:
     """ RPC API handler class.
 
diff --git a/test/test_rpc.py b/test/test_rpc.py
index 6540b4a5..4e81a7cb 100644
--- a/test/test_rpc.py
+++ b/test/test_rpc.py
@@ -14,7 +14,7 @@ from redis.client import Pipeline
 import aurweb.models.dependency_type as dt
 import aurweb.models.relation_type as rt
 
-from aurweb import asgi, config, db, scripts
+from aurweb import asgi, config, db, rpc, scripts
 from aurweb.models.account_type import USER_ID
 from aurweb.models.license import License
 from aurweb.models.package import Package
@@ -215,6 +215,29 @@ def pipeline():
     yield pipeline
 
 
+def test_rpc_documentation(client: TestClient):
+    with client as request:
+        resp = request.get("/rpc")
+    assert resp.status_code == int(HTTPStatus.OK)
+    assert "aurweb RPC Interface" in resp.text
+
+
+def test_rpc_documentation_missing():
+    config_get = config.get
+
+    def mock_get(section: str, key: str) -> str:
+        if section == "options" and key == "aurwebdir":
+            return "/missing"
+        return config_get(section, key)
+
+    with mock.patch("aurweb.config.get", side_effect=mock_get):
+        config.rehash()
+        expr = r"^doc/rpc\.html could not be read$"
+        with pytest.raises(OSError, match=expr):
+            rpc.documentation()
+    config.rehash()
+
+
 def test_rpc_singular_info(client: TestClient,
                            user: User,
                            packages: List[Package],