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PopNx MCPMCP servers for people who use AI · explained in plain words

Multiplayer Agent

by multiplayeragentversion 1.0.2i★ –iRuns in the cloud
Registry namecom.multiplayeragent/multiplayer-agent

Install

Overview

Description from the maker (original English)

Make any browser game multiplayer and host it at a share link. No account needed to start.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

  • Connection: Runs in the cloud
  • Transport: Streamable HTTP
  • Category: Web & browsers
  • You need to fill in: Authorization

Install

Pick the AI app you use, then copy the settings.

Before you install

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

Which app do you use?

Pick your app above. We remember it, so next time the button says “Install in …”.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Run this in your terminal

claude mcp add --transport http multiplayer-agent 'https://api.multiplayeragent.com/mcp?src=registry' --header 'Authorization: your-value'

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "multiplayer-agent": {
      "url": "https://api.multiplayeragent.com/mcp?src=registry",
      "headers": {
        "Authorization": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "multiplayer-agent": {
      "type": "http",
      "url": "https://api.multiplayeragent.com/mcp?src=registry",
      "headers": {
        "Authorization": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

  • Authorization secret HTTP header
    Optional. Bearer : the studio secret key, starting sk_, from https://multiplayeragent.com/dashboard/key. Without it, the agent connects the session to an account through a browser sign-in, or builds…

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Tool names and descriptions exactly as the server reported them on Nov 7, 2026. The maker wrote them, not us; we show them as plain text.

  • create_game

    Mint a new game (publishable key) under your studio (secret key). Returns its publishableKey + wsEndpoint. Point a client at the new key, or scope this MCP to it by passing the x-mp-game header.

  • list_games

    List the games (publishable keys) under your studio, with labels and per-game settings. Marks which game is `primary` (the one unnamed calls fall back to) and which one this connection is currently pointed at.

  • set_game_name

    Set a human-readable name for a game (the `game` argument, else the x-mp-game header, else your only game). The name shows in your dashboard: call this when you start building so the game isn't unnamed. Refuses to guess when the studio has several games and none was named.

  • define_room_type

    Create or replace the spec for a room (validation/types/defaults). Returns connection info. Omit fields entirely for a fully schemaless room.

  • get_connection_info

    Returns { wsEndpoint, roomName, publishableKey, adsPublisherId } for wiring a client. adsPublisherId is your BYO Google Ads id (embed it if set). Check the returned `target` names the game you meant before shipping the key.

  • get_client_snippet

    Returns a complete single-file HTML game wired to this room: realtime movement plus an anonymous (claimable) player, a saved color (datastore), and a click leaderboard. Write it to disk and open it. The game it is wired to is stamped in a comment at the top of the file.

  • deploy_room_logic

    Deploy server-side game logic (JS source) for a room so it runs AUTHORITATIVELY: clients send inputs and the server computes state on a tick (anti-cheat by construction). Define handlers as functions over a global `state` (RoomStateView shape): onJoin(id), onLeave(id), onInput(id

  • list_room_logic

    Returns the deploy history (version, tickRate, bytes, deployedAt) for a room's authoritative logic, newest first.

  • rollback_room_logic

    Roll a room's authoritative logic back to a prior version by re-deploying it as a new version (history stays intact). Omit toVersion to restore the previous version.

  • get_room_logs

    Returns recent runtime errors from a room's deployed logic (newest first), so you can self-fix after a deploy without joining the room. Errors also surface in state.shared.__error.

  • get_live_ops

    Read a game's live ops: `now` (what players see right now: the merged config plus active and upcoming events), the base config, every scheduled event with its status (active / upcoming / ended), the highlight webhook (masked) and the 20 latest highlights with how each was deliver

  • set_live_config

    Set the game's live config: any JSON the game reads at runtime (drop rates, prices, difficulty, a banner, feature switches). It reaches rooms that are already running within ~15 seconds, with no redeploy and nobody disconnected; clients read it as mp.live.config, server logic as

  • schedule_live_event

    Schedule (or, with an existing id, edit) a timed event: a window, optionally repeating daily or weekly, optionally limited to some rooms, carrying config overrides that apply only while it runs. It starts and ends on time in rooms that are already running, as data: nobody is kick

  • cancel_live_event

    Delete a scheduled event. If it is running, it ends in running rooms within ~15 seconds (its config overrides drop away; server logic gets onLiveOps with it in change.ended). To end it early but keep it listed, schedule the same id again with endsAt set to the current time.

  • set_highlight_webhook

    Set where the game's highlights post: a Discord channel webhook (Server Settings → Integrations → Webhooks → Copy URL) or a Slack incoming webhook. Server logic posts with highlight(type, text, data), e.g. highlight("hard-clear", "Mia cleared Level 9 on one life"); the server dec

  • get_sdk_reference

    Returns the full SDK reference (markdown) wired to ONE game's key/endpoints: realtime rooms, player identity (anonymous + claim/login), the datastore (saves/stats/inventory), leaderboards, player-created content (level sharing / UGC), durable shared MATCHES for asynchronous turn-

  • set_player_scope

    Choose whether players (and their data/leaderboards) are shared across all of your games ('account', the default) or isolated to one game ('project'). Set this ONCE at setup: it locks as soon as the game has any players, because changing it would split existing players and their

  • enable_login_provider

    Let players sign in with a portal or federated account via player.loginExternal({ provider, token }). Self-serve providers: 'wavedash' (games on wavedash.com; token = (await Wavedash.getUserJwt()).data) and 'google' (Google Identity Services; token = the GIS ID-token credential).

  • list_login_providers

    List the external login providers enabled on a game (names only, never secrets). selfServe=true ones you can reconfigure with enable_login_provider; the rest are operator-managed.

  • verify_login_token

    Check a real provider token against the game's login config exactly as player.loginExternal would, WITHOUT creating or linking a player. Returns { ok, uid, username, claims } or { ok: false, error }. Use it to confirm a provider works end to end, and to read what a token carries

  • create_upload

    Upload files straight from disk instead of pasting their bytes into a tool call: for images, audio, fonts, 3D models, and ANY file over ~50 KB (a tool call can't carry megabytes of base64). Give each file's hosted path and exact size in bytes; get back one URL per file. PUT each

  • publish_game

    Host the game's files at a public share link, https:// .play.multiplayeragent.com/ (the game's own origin; the slug comes from the game's name and never changes). The game needs an index.html at the root plus any JS/CSS/assets, paths relative to it. Send small text files (HTML, J

  • list_starters

    List the starter games: ready-made multiplayer games (many built in Multiplayer Agent's videos) to begin from with remix_game. Each shows its slug, title, summary, the video it came from, whether it's premium, and whether THIS studio has it unlocked (free starters: everyone; prem

  • remix_game

    Start from a starter game (see list_starters): makes a NEW game in this studio (or, with `game`, reuses one of yours) and returns a link to the starter's source as a ZIP, valid for 5 minutes, plus the steps to unpack it, rewire it to the new game's publishable key, and publish it

  • connect_account

    Connect this keyless session to the user's own account, the way `gh auth login` works. Ask for their email first and pass it (it prefills the page). Returns a one-time url and a code: open the url in their browser yourself and tell them the code. They sign up or log in ON THE PAG

  • claim_studio

    This connection has no account: it builds into an unclaimed studio. Returns the claim link to give the user (a free sign-up or log-in that moves the studio's games into their own account), when the studio expires, and whether it has been claimed already. connect_account is the be

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

  • ✓ Pass

    Maker matches the repo

    The registry name was verified against the domain multiplayeragent.com (the registry checks domain ownership)

  • … Not checked yet

    Still maintained

    We have not read this repo from GitHub yet

  • … Not checked yet

    Has a licence

    We have not read this repo from GitHub yet

  • ✓ Pass

    Endpoint responds

    Responded in 355 ms (HTTP 200)

  • – Not applicable

    Sign-in with OAuth

    No sign-in needed

  • ✓ Pass

    No hidden instructions in tool descriptions

    Read 26 tool descriptions and found no hidden instructions to the AI

Compared with others in Web & browsersi

  • More stars than 0% of the other 880 servers in this category
  • Published to the registry more recently than 77% of the other 880 servers in this category
  • Basic checks equal to or better than 100% of the other 880 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Multiplayer Agent safe?

It passed 3 of 3 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: Authorization

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.0.2) reached the registry 10 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Browser Use, Chrome DevTools MCP, MCP Server Browser

Alternatives

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Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

Multiplayer Agent for Claude Code

Make any browser game multiplayer from Claude Code, and host it at a share link a friend can open. This plugin connects Claude Code to the hosted Multiplayer Agent backend, which provides rooms, shared real-time state, player identity, saved progress, leaderboards and game hosting, so Claude never has to write or run a game server. It also adds a make-it-multiplayer skill that teaches Claude how to design, wire, test and publish a multiplayer game on it.

No account or key is needed to start. Claude asks for your email and opens a page where you sign up or log in (your password is typed on the website, never in the chat), so your games are saved to your own account.

Install

Type these in Claude Code:

/plugin marketplace add multiplayeragent/multiplayer-agent

/plugin install multiplayer-agent@multiplayer-agent

If the tools don't show up straight away, type /reload-plugins. Then ask Claude something like "build me a multiplayer snake game" or "make this game multiplayer".

What it includes

  • MCP server multiplayer-agent at https://api.multiplayeragent.com/mcp (remote, streamable HTTP, no key required).
  • Skill make-it-multiplayer, used automatically when you ask for multiplayer, co-op, a lobby, an invite link, a leaderboard or hosting.

Data and privacy

The plugin sends requests to api.multiplayeragent.com: the game definitions, room settings and game files Claude creates or publishes for you, plus the email you choose to connect. Games you publish are served from *.play.multiplayeragent.com, and players' game state goes to the same backend while they play. See the privacy policy and terms.

Links

  • How the connection works: https://multiplayeragent.com/mcp
  • SDK reference: https://multiplayeragent.com/docs
  • Pricing (free tier, no card): https://multiplayeragent.com/pricing
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