diff --git a/Cargo.lock b/Cargo.lock
index 274dee2..dcb8f5d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1202,6 +1202,18 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "ptth_multi_call_server"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "ptth_server",
+ "quic_demo",
+ "tokio",
+ "tracing",
+ "tracing-subscriber",
+]
+
 [[package]]
 name = "ptth_quic_client_gui"
 version = "0.1.0"
diff --git a/crates/ptth_core/src/prelude.rs b/crates/ptth_core/src/prelude.rs
index 4a2b7d2..d674eeb 100644
--- a/crates/ptth_core/src/prelude.rs
+++ b/crates/ptth_core/src/prelude.rs
@@ -1,4 +1,5 @@
 pub use std::{
+	ffi::OsString,
 	io::Write,
 	sync::Arc,
 	time::{Duration, Instant},
diff --git a/crates/ptth_multi_call_server/Cargo.toml b/crates/ptth_multi_call_server/Cargo.toml
new file mode 100644
index 0000000..0313b6b
--- /dev/null
+++ b/crates/ptth_multi_call_server/Cargo.toml
@@ -0,0 +1,14 @@
+[package]
+name = "ptth_multi_call_server"
+version = "0.1.0"
+authors = ["Trish"]
+edition = "2018"
+license = "AGPL-3.0"
+
+[dependencies]
+anyhow = "1.0.38"
+ptth_server = { path = "../ptth_server" }
+quic_demo = { path = "../../prototypes/quic_demo" }
+tokio = { version = "1.8.1", features = ["full"] }
+tracing-subscriber = "0.2.16"
+tracing = "0.1.25"
diff --git a/crates/ptth_multi_call_server/src/main.rs b/crates/ptth_multi_call_server/src/main.rs
new file mode 100644
index 0000000..607d046
--- /dev/null
+++ b/crates/ptth_multi_call_server/src/main.rs
@@ -0,0 +1,51 @@
+use std::{
+	iter::FromIterator,
+};
+
+enum Subcommand {
+	PtthServer,
+	PtthQuicEndServer,
+}
+
+fn parse_subcommand (name: &str) -> Option <Subcommand>
+{
+	if name.ends_with ("ptth_server") || name.ends_with ("ptth_server.exe") 
+	{
+		Some (Subcommand::PtthServer)
+	}
+	else if name.ends_with ("ptth_quic_end_server") || name.ends_with ("ptth_quic_end_server.exe") 
+	{
+		Some (Subcommand::PtthQuicEndServer)
+	}
+	else {
+		None
+	}
+}
+
+#[tokio::main]
+async fn main () -> anyhow::Result <()> {
+	tracing_subscriber::fmt::init ();
+	
+	let args = Vec::from_iter (std::env::args_os ());
+	
+	let arg_0 = args [0].to_str ().expect ("exe name should be valid UTF-8");
+	match parse_subcommand (arg_0) {
+		Some (Subcommand::PtthServer) => return ptth_server::executable::main (&args).await,
+		Some (Subcommand::PtthQuicEndServer) => return quic_demo::executable_end_server::main (&args).await,
+		_ => (),
+	}
+	
+	let arg_1 = match args.get (1) {
+		Some (x) => x,
+		None => anyhow::bail! ("Subcommand must be the first argument if it's not the exe name"),
+	};
+	
+	let arg_1 = arg_1.to_str ().expect ("subcommand should be valid UTF-8");
+	match parse_subcommand (arg_1) {
+		Some (Subcommand::PtthServer) => return ptth_server::executable::main (&args [1..]).await,
+		Some (Subcommand::PtthQuicEndServer) => return quic_demo::executable_end_server::main (&args [1..]).await,
+		_ => (),
+	}
+	
+	anyhow::bail! ("Subcommand should be provided in exe name or first argument, e.g. `./ptth_multi_call_server ptth_server`");
+}
diff --git a/crates/ptth_server/src/bin/ptth_server.rs b/crates/ptth_server/src/bin/ptth_server.rs
index a069c0a..a03af00 100644
--- a/crates/ptth_server/src/bin/ptth_server.rs
+++ b/crates/ptth_server/src/bin/ptth_server.rs
@@ -1,10 +1,12 @@
-#![warn (clippy::pedantic)]
+use std::{
+	iter::FromIterator,
+};
 
 #[tokio::main]
 async fn main () -> anyhow::Result <()> {
 	tracing_subscriber::fmt::init ();
 	
-	let args = std::env::args_os ();
+	let args = Vec::from_iter (std::env::args_os ());
 	
-	ptth_server::executable::main (args).await
+	ptth_server::executable::main (&args).await
 }
diff --git a/crates/ptth_server/src/lib.rs b/crates/ptth_server/src/lib.rs
index 0d3455c..8b55936 100644
--- a/crates/ptth_server/src/lib.rs
+++ b/crates/ptth_server/src/lib.rs
@@ -490,7 +490,7 @@ pub mod executable {
 		prelude::*,
 	};
 	
-	pub async fn main (args: std::env::ArgsOs) -> anyhow::Result <()> {
+	pub async fn main (args: &[OsString]) -> anyhow::Result <()> {
 		let opt = Opt::from_iter (args);
 		let asset_root = opt.asset_root;
 		
diff --git a/prototypes/quic_demo/src/bin/quic_demo_end_server.rs b/prototypes/quic_demo/src/bin/quic_demo_end_server.rs
index 86c3cc8..f2d9f75 100644
--- a/prototypes/quic_demo/src/bin/quic_demo_end_server.rs
+++ b/prototypes/quic_demo/src/bin/quic_demo_end_server.rs
@@ -1,8 +1,12 @@
+use std::{
+	iter::FromIterator,
+};
+
 #[tokio::main]
 async fn main () -> anyhow::Result <()> {
 	tracing_subscriber::fmt::init ();
 	
-	let args = std::env::args_os ();
+	let args = Vec::from_iter (std::env::args_os ());
 	
-	quic_demo::executable_end_server::main (args).await
+	quic_demo::executable_end_server::main (&args).await
 }
diff --git a/prototypes/quic_demo/src/executable_end_server.rs b/prototypes/quic_demo/src/executable_end_server.rs
index 62804ac..bcadac4 100644
--- a/prototypes/quic_demo/src/executable_end_server.rs
+++ b/prototypes/quic_demo/src/executable_end_server.rs
@@ -16,7 +16,7 @@ struct Opt {
 	cert_url: Option <String>,
 }
 
-pub async fn main (args: std::env::ArgsOs) -> anyhow::Result <()> {
+pub async fn main (args: &[OsString]) -> anyhow::Result <()> {
 	let opt = Arc::new (Opt::from_iter (args));
 	
 	let server_cert = match opt.cert_url.as_ref () {
diff --git a/prototypes/quic_demo/src/prelude.rs b/prototypes/quic_demo/src/prelude.rs
index 03fc349..7515241 100644
--- a/prototypes/quic_demo/src/prelude.rs
+++ b/prototypes/quic_demo/src/prelude.rs
@@ -1,5 +1,6 @@
 pub use std::{
 	collections::*,
+	ffi::OsString,
 	net::SocketAddr,
 	sync::{
 		Arc,