diff --git a/pyproject.toml b/pyproject.toml
index 6395eabf..7cf4f34f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,7 +12,8 @@ authors = ["Evelina Gabasova <evelina@evelinag.com>",
            "Tomas Lazauskas <tlazauskas@turing.ac.uk>",
            "David Beavan <dbeavan@turing.ac.uk>",
            "Levan Bokeria <lbokeria@turing.ac.uk>",
-           "Martin O'Reilly <moreilly@turing.ac.uk>"]
+           "Martin O'Reilly <moreilly@turing.ac.uk>",
+           "Oliver Strickson <ostrickson@turing.ac.uk>"]
 readme = "README.md"
 
 [tool.poetry.dependencies]
diff --git a/reginald/models/app.py b/reginald/models/app.py
index b64b90c0..dd17ad5b 100644
--- a/reginald/models/app.py
+++ b/reginald/models/app.py
@@ -47,10 +47,19 @@ async def ping():
         return "pong"
 
     # set up direct_message endpoint
+    #
+    # See the note on the below 'POST' endpoint and consider deprecating
     @app.get("/direct_message")
     async def direct_message(query: Query):
-        response = response_model.direct_message(query.message, query.user_id)
-        return response
+        return response_model.direct_message(query.message, query.user_id)
+
+    # A POST direct_message endpoint, equivalent to the above.
+    # This provides a version of the endpoint that avoids a surprising use of
+    # the message body for a GET request.  Provided as an additional endpoint
+    # instead of replacing the GET endpoint to avoid breaking things.
+    @app.post("/direct_message")
+    async def direct_message(query: Query):
+        return response_model.direct_message(query.message, query.user_id)
 
     # set up channel_mention endpoint
     @app.get("/channel_mention")
@@ -58,6 +67,12 @@ async def channel_mention(query: Query):
         response = response_model.channel_mention(query.message, query.user_id)
         return response
 
+    # POST channel_mention endpoint: see comment on direct_message
+    @app.post("/channel_mention")
+    async def channel_mention(query: Query):
+        response = response_model.channel_mention(query.message, query.user_id)
+        return response
+
     uvicorn.run(app, host="0.0.0.0", port=8000)