v1.0 // Go + QUIC + WebSocket

Contra Anniversary Collection Switch Nsp Update May 2026

A lightweight Go binary that moves files and relays multi-user chat over QUIC. Works from the CLI or a browser. No accounts, no cloud — just room codes.

Go to App Watch the demo Read the docs
~/airsend 
# start the server (web UI + QUIC relay in one process)
$ airsend -sw 0.0.0.0 3888 0.0.0.0 8443
→ web: http://0.0.0.0:3888  ·  quic: 0.0.0.0:8443

# send a file, get a code
$ airsend -f ./logs.tar.gz
→ code: wave21

# receive it anywhere
$ airsend -r wave21
Features

Everything you expect.
None of the bloat.

One binary. Two transports. Zero dependencies at the user’s side — no account, no install step for the receiver if they use the browser.

Contra Anniversary Collection Switch Nsp Update May 2026

The Switch is arguably the best platform for this collection for one simple reason: .

Initially, many of the Japanese versions of these games (which often featured different storylines, cutscenes, and difficulty levels) were missing. The update adds these as free DLC/updates, allowing players to experience Contra: Hard Corps with a life bar (exclusive to the JP version) instead of the brutal "one-hit-kill" Western difficulty. Contra Anniversary Collection Switch NSP UPDATE

You can now fully customize your controls, which is a godsend for those who find the default layout of the Switch Joy-Cons a bit cramped for retro action. The Switch is arguably the best platform for

One-shot file pickup

Files are deleted from the server after the first download. Code-based lookup (wave21, dock42). No lingering blobs.

Multi-user chat rooms

Broadcast rooms by code. CLI TUI or browser — identical semantics.

Rate limited by scope

Token bucket per IP × scope: upload, paste, download, ws. Proxy aware.

Direct P2P mode

Bypass the relay entirely with -d / -ds. Pure peer-to-peer.

Self-signed TLS

Protocol "airsend" over generated certs. Intentional.

How it works

Three commands. One code.

Click a step on the right to scrub through the demo.

The Switch is arguably the best platform for this collection for one simple reason: .

Initially, many of the Japanese versions of these games (which often featured different storylines, cutscenes, and difficulty levels) were missing. The update adds these as free DLC/updates, allowing players to experience Contra: Hard Corps with a life bar (exclusive to the JP version) instead of the brutal "one-hit-kill" Western difficulty.

You can now fully customize your controls, which is a godsend for those who find the default layout of the Switch Joy-Cons a bit cramped for retro action.