Game Development

gamerelay.io

GameRelay provides tools and guides for adding multiplayer rooms, lobbies, chat, leaderboards, and other features to browser games.

2 endpoints3 known toolsFirst detected October 17, 2026Last detected October 17, 2026

ENDPOINT 1

https://gamerelay.io/mcp

No auth detected

MCP server metadata

Name: gamerelay
Version: 1.0.0

Capabilities

toolsresources

Server instructions

GameRelay turns a browser game into an online multiplayer game with no server code: rooms and invite links, quick match, parties, host migration, chat, leaderboards and saved player data, from one script tag. It is built for games made with AI, so a user can go from an idea to a game their friends are playing in a few minutes. The fastest path to a playable multiplayer game: 1. Find out what the user wants to make. If they are unsure, suggest something small that is fun with friends (a top-down arena, a racer, a party quiz, a co-op puzzle). Pick its shape with get_integration_guide section "Pick your shape": avatars (each player moves their own thing), host (one browser simulates from everyone's inputs) or mixed. 2. Call get_starter_game with that shape: a complete, working index.html. Build the game on top of it instead of writing networking from scratch, and read the guide sections for anything you add (Invite links, Lobby, Chat, Leaderboards, Player data). With the account server connected, create_game does this and step 3 in one call. 3. The game needs a public key (gr_pub_…). If the account server (https://gamerelay.io/mcp/admin) is connected, create_instance makes one; otherwise the user signs in at https://gamerelay.io/app (free plan, about a minute) and copies it. check_public_key confirms a key works. 4. The user opens the file in two browser tabs to see multiplayer, then puts it on any static host (itch.io, GitHub Pages, Netlify, their own site) and sends friends the invite link. No server to deploy. Once the game has a home, giving its instance a slug and play URL turns every invite into a short play.gamerelay.io link that previews with the game's cover in Discord, iMessage and Slack (guide section "Invite links"). Public keys are safe in game code; secret keys (gr_sk_…) never are. Connect the account server to create games, change settings, read logs and usage, moderate rooms, manage webhooks and subscribe to game events (it asks the user to sign in once).

Known tools 3

get_integration_guide

Everything needed to make a browser game multiplayer with GameRelay: pick your shape, three complete starters, entities (synced, smoothed objects), events, requests to the host, claims, inputs, state and timers, slots and teams, host changes, relay.tick, debugging, then rooms, lobbies, parties, chat, leaderboards, player saves, signed-in players (JWT tokens), moderation, webhooks and limits.

Inferred read-only

get_starter_game

The fastest way to a playable multiplayer game: a complete, working single-file HTML game using the GameRelay SDK, with rooms and an invite link already wired up.

Inferred read-only

check_public_key

Check that a GameRelay public key (gr_pub_…) belongs to a live instance, and show which features it has on (saves and leaderboards, parties, chat), its default room size and what its plan includes.

Inferred read-only

CONNECT WITH APPROVAL

Client installation

Review this server and its permissions before adding it. Secret placeholders must be set locally.

Codex

~/.codex/config.toml

[mcp_servers.gamerelay]
url = "https://gamerelay.io/mcp"
enabled = true

Claude Code

.mcp.json

{
  "mcpServers": {
    "gamerelay": {
      "type": "http",
      "url": "https://gamerelay.io/mcp"
    }
  }
}

Claude Desktop

Settings → Connectors → Add custom connector

Name: gamerelay
Remote MCP URL: https://gamerelay.io/mcp

Add this remote URL as a custom connector in Claude Desktop. Availability depends on the user plan and workspace policy.

Cursor

.cursor/mcp.json

{
  "mcpServers": {
    "gamerelay": {
      "url": "https://gamerelay.io/mcp"
    }
  }
}

Visual Studio Code

.vscode/mcp.json

Add to Visual Studio Code

{
  "servers": {
    "gamerelay": {
      "type": "http",
      "url": "https://gamerelay.io/mcp"
    }
  }
}

Generic MCP

Client-specific MCP configuration

{
  "name": "gamerelay",
  "transport": "streamable-http",
  "url": "https://gamerelay.io/mcp"
}

MCP Inspector

Run the official MCP Inspector locally and enter the indexed Streamable HTTP endpoint.

ENDPOINT 2

https://gamerelay.io/mcp/admin

Auth required

Known tools 0

No tool metadata was available in the registry cache.

CONNECT WITH APPROVAL

Client installation

Review this server and its permissions before adding it. Secret placeholders must be set locally.

Codex

~/.codex/config.toml

[mcp_servers.gamerelay-io]
url = "https://gamerelay.io/mcp/admin"
enabled = true
bearer_token_env_var = "MCP_BEARER_TOKEN"

Authentication is required. Replace the placeholder locally and never commit a secret.

Claude Code

.mcp.json

{
  "mcpServers": {
    "gamerelay-io": {
      "type": "http",
      "url": "https://gamerelay.io/mcp/admin",
      "headers": {
        "Authorization": "Bearer YOUR_BEARER_TOKEN"
      }
    }
  }
}

Authentication is required. Replace the placeholder locally and never commit a secret.

Claude Desktop

Settings → Connectors → Add custom connector

Name: gamerelay-io
Remote MCP URL: https://gamerelay.io/mcp/admin

Add the URL as a custom connector, then complete its supported authorization flow. Claude Desktop remote connectors are configured in the UI.

Cursor

.cursor/mcp.json

{
  "mcpServers": {
    "gamerelay-io": {
      "url": "https://gamerelay.io/mcp/admin",
      "headers": {
        "Authorization": "Bearer YOUR_BEARER_TOKEN"
      }
    }
  }
}

Authentication is required. Replace the placeholder locally and never commit a secret.

Visual Studio Code

.vscode/mcp.json

{
  "servers": {
    "gamerelay-io": {
      "type": "http",
      "url": "https://gamerelay.io/mcp/admin",
      "headers": {
        "Authorization": "Bearer ${input:mcp-token}"
      }
    }
  },
  "inputs": [
    {
      "type": "promptString",
      "id": "mcp-token",
      "description": "gamerelay-io bearer token",
      "password": true
    }
  ]
}

Authentication is required. Replace the placeholder locally and never commit a secret.

Generic MCP

Client-specific MCP configuration

{
  "name": "gamerelay-io",
  "transport": "streamable-http",
  "url": "https://gamerelay.io/mcp/admin",
  "headers": {
    "Authorization": "Bearer YOUR_BEARER_TOKEN"
  }
}

Authentication is required. Replace the placeholder locally and never commit a secret.

MCP Inspector

Run the official MCP Inspector locally and enter the indexed Streamable HTTP endpoint.

TRUST AND VERIFICATION EVIDENCE

Loading Trust v2 evidence…

Checking the associated registrable domain. The BuiltWith key remains server-side.

Indexed

Evidence is source-attributed and does not guarantee that a third-party server is safe. Risk labels are conservative metadata heuristics.