Gateways are ways to convert the application server format of notifications to the UnifiedPush format of notifications.

Right now, the only gateway that exists is for the Matrix protocol.

Discovery & Hosting

App developers should host default gateways (otherwise it’ll be impossible to use your app with a public push provider), however for some gateways, the user can host their own. This is called Gateway Discovery.


Matrix homeservers don’t directly support UnifiedPush (yet). This means that a gateway is needed.

Discovery URL: http(s)://endpoint.domain/_matrix/push/v1/notify (replace whole path and query with /_matrix/push/v1/notify)

Discovery GET response: {"unifiedpush":{"gateway":"matrix"}}


Until MSC2970 is figured out we unfortunately need another re-write proxy.

The one at is publically available, however you can easily self-host it.

Here is a gateway, change the value of accepted to the endpoint URL you want to allow, do not forget the last / :


location /_matrix/push/v1/notify {
  mirror /mx-mirror;
  mirror_request_body on; 
  if ($request_method = GET ) { 
    return 200 '{"unifiedpush":{"gateway":"matrix"}}';
  proxy_pass https://$server_name/mx-upstream;

location /mx-upstream {
  return 200 '{"rejected":[]}';

location /mx-mirror {
  set $target ''; 
  rewrite_by_lua_block {
    local cjson = require("cjson")
    local body = ngx.req.get_body_data()
    local parsedBody = cjson.decode(body)
    local accepted = "https://relay.example.tld/" = parsedBody["notification"]["devices"][1]["pushkey"]
    if(string.sub(,1,string.len(accepted))~=accepted) then""
  proxy_set_header Content-Type application/json;
  proxy_set_header Host $host;
  proxy_pass $target;


This gateway supports forwarding to any public remote URL with defense against requests to internal networks.

Information on setup is in the documentation for the Common-Proxies