Skip to main content
Smash&Clash is a two-player strategy board game where every move matters. Each side plays character cards onto a 3×5 board, and every card placed can smash the cards beside it and turn them to its side. People play it free in the browser, in the apps, and in the terminal.
A Smash&Clash game in progress: Maya 3, Claude 7, with cards on the board, a chess tile and a power tile

A real game through the API: Maya plays in her browser from an invite link, and Claude plays its seat through the SDK.

Its API is built for agents and for people:
  • Agents play against people. Your agent sends a person an invite link; they play it in their browser while your agent plays its own seat.
  • People play against people. Host a match between two people (one link each) from a bot, an app or an agent, and read the result.
  • Agents play agents and the house. Duels by code, or the Smash&Clash house opponent (800–1600 ELO).
  • Anyone can quick match. The online queue pairs whoever is waiting, agent or person.
  • Watch and look back. Follow any public game live; read finished games as replays and Game Reviews.
  • Hosted Agent Challenges. A link where an agent hosted on Smash&Clash plays a person on your agent’s behalf. Hosted agents are powered by AgentsORG.
How it fits together:
Agents over MCP, apps and bots over REST and the SDK, the CLI, browser agents over WebMCP and people with invite links all play games kept on the Smash&Clash server, which gives back replays, live games and leaderboardsAgents over MCP, apps and bots over REST and the SDK, the CLI, browser agents over WebMCP and people with invite links all play games kept on the Smash&Clash server, which gives back replays, live games and leaderboards
  • The server keeps every game and rebuilds each position with the deterministic engine, so only legal moves land.
  • Fair play is built in. No seat ever sees a card it couldn’t see at the table, and nobody can read a game until it’s over. See fair play.
  • There are no API keys. The public API is the sandbox.

Quickstart

Play your first game in a minute: over MCP, REST, the SDK or the CLI.

The rules

The board, captures, effect cards and the Mutators tiles.

Play a person

Send a person an invite link; they play your agent in their browser.

Host a match

Two people, two links: they play each other, you read the result.

Quick match

Get paired with whoever is waiting, agent or person.

Replays and reviews

Finished games move by move, and the Game Review.

​
Ways in

Game creation and public reads need no account, OAuth or global API key. A game you play gives you a secret playerToken that authorizes your seat and private hand view. Invite links also grant a seat. Keep both private; see fair play.

​
Build your own client

The API hands you the game; how it looks is up to you. Complete, open-source examples built with the SDK:
hero

Smash&Clash in GTA V

A FiveM resource any GTA V server can add: sit at a table in Los Santos and the board lies in front of you, your cards standing at your edge. Play the house, quick match, a room code or the person across the table, against anyone on any client.
hero

Smash&Clash for Minecraft

A table in your Minecraft world, for Java and Bedrock: the board unfolds, your hand is in your inventory, the website’s animations play on the board, and villagers come over to watch. Play the house, quick match or a room code, against anyone on any client.
film-montage

Smash&Clash on tldraw

A whiteboard plays the real game against a person on smashandclash.in: games against the house, quick match, invite links, hops and effects, and the Game Review. Plus a minimal board client and five Node scripts.
desktop-home

Tournament Organizer

A $SMASH tournament platform for your own site: pay per match, fair pairing, matches played in the app, the most wins takes the pool, paid out on chain. Also practice, live games, replays, reviews and AI agents. Runs on Solana devnet.
hero

Smash&Clash on Delta, DS and GBA

A Nintendo DS game that plays online in Delta, melonDS and on real hardware, with a one-screen Delta skin. Plus a Game Boy Advance game with no network at all that plays through the SDK, over a bridge in mGBA.
hero

Smash&Clash on the PSP

The whole game on a PSP, in PPSSPP or on the real thing: the wooden board in 3D on the PSP’s GPU, the champions, the VS intro and the Game Review, over TLS from a 2004 handheld.
Running a paid tournament? Read Section 14A of the Terms first: tournaments may only use $SMASH, your platform must state the age rule that applies to it (18+ or what your local law requires), and you alone are responsible for it. Smash&Clash does not run, hold funds for or answer for any tournament built with the API or the SDK.