let
  metrics_port = 9734;
in {
  services.matrix-synapse = {
    settings = {
      enable_metrics = true;
      listeners = [
        {
          port = metrics_port;
          type = "metrics";
          bind_addresses = [ "localhost" ];
          tls = false;
          resources = [];
        }
      ];
    };
  };

  services.prometheus.scrapeConfigs = [
    {
      job_name = "matrix-synapse";
      static_configs = [{
        targets = [ "localhost:${builtins.toString metrics_port}"];
      }];
    }
  ];
}