Yes2SDK MCP Server

What is Yes2SDK MCP Server?

The Yes2SDK MCP Server is the official hosted MCP server from Yes2Games that gives your AI coding assistant live access to the Yes2SDK docs, API reference, platform-compliance rules and a build validator. It needs no sign-in or API key.

Yes2SDK is a single SDK for shipping HTML5 games built with Unity, Defold or plain JavaScript to web game platforms such as Poki, CrazyGames, Yandex Games, YouTube Playables, GameDistribution and Jest. Yes2Games built the MCP server for developers who integrate the SDK with help from an assistant such as Claude Code, Cursor, Windsurf or VS Code Copilot. The assistant can pull the exact API reference, quickstart and platform rules when it needs them, then check a build against the same rejection rules each platform enforces.

How to use Yes2SDK MCP Server?

The hosted server lives at https://mcp.yes2games.com/mcp and speaks Streamable HTTP. There is nothing to build or run, and no authentication.

Claude Code

Yes2Games says the fastest path is its Claude Code plugin, which registers this server for you. To add the server by hand:

claude mcp add --transport http yes2sdk https://mcp.yes2games.com/mcp

Run /mcp to confirm that the yes2sdk server is listed.

Claude Desktop and claude.ai

Add a custom connector (Settings → Connectors → Add custom connector) and paste https://mcp.yes2games.com/mcp as the URL. No sign-in step is needed.

Cursor

Add an entry to ~/.cursor/mcp.json or the project's .cursor/mcp.json. The Yes2SDK docs give this shape:

{
  "mcpServers": {
    "yes2sdk": {
      "type": "http",
      "url": "https://mcp.yes2games.com/mcp"
    }
  }
}

VS Code

In .vscode/mcp.json:

{
  "servers": {
    "yes2sdk": {
      "type": "http",
      "url": "https://mcp.yes2games.com/mcp"
    }
  }
}

Run locally (alternative)

If you would rather run the server yourself over stdio, Yes2Games publishes an npm package:

{
  "mcpServers": {
    "yes2sdk": {
      "command": "npx",
      "args": ["-y", "@yes2games/yes2sdk-mcp"]
    }
  }
}

Key features of Yes2SDK MCP Server

• Official server from Yes2Games, hosted at mcp.yes2games.com, with no account or key required
• Version-pinned install steps for Unity, Defold and JavaScript games
• Full quickstart guides for Poki, CrazyGames, Yandex Games, GameDistribution, YouTube Playables and Jest
• Exact method signatures for every SDK module, including ads, analytics, auth, banners, data, leaderboard, IAP and more
• Pre-upload build validation against platform rejection rules, with FAIL/WARN/INFO findings
• A platform-by-module support matrix that shows when a feature needs an isSupported() guard
• Symptom-based troubleshooting for common integration failures

Yes2SDK MCP Server tools

The probe returned 11 tools, in four groups:

• Setup: get_install_instructions returns version-pinned steps to add the SDK to a Unity, Defold or JS project. It never modifies the project. detect_sdk reports the project's engine, whether the SDK is installed, and which install steps remain. On the hosted server you pass the relevant files inline (for example package.json or Packages/manifest.json). A local server can read a projectPath instead.
• Docs: search_docs runs a keyword search and returns the top five matching sections. get_quickstart returns the guide for one platform, and get_api_reference returns one module's reference. list_sdk_modules lists the modules.
• Compliance: get_platform_requirements lists a platform's rules. get_compliance_rule explains one rule by ID, such as P-002, and how to fix it. get_platform_capabilities shows which modules are Ready or Partial on each platform. For example, Friends is CrazyGames-only and banners are not offered on Poki.
• Validation and debugging: validate_integration grades a build for a target platform. The hosted server cannot access your disk, so you pass inline content such as indexHtml and a file list. troubleshoot maps an error string or symptom to a likely cause and ordered fixes.

Use cases of Yes2SDK MCP Server

• Starting an integration: "Add the Yes2SDK to this Unity project and set up the WebGL template."
• Platform prep: "What do I have to get right before submitting this game to CrazyGames?"
• Pre-upload check: "Validate this build's index.html for Poki and tell me what would get it rejected."
• Feature guarding: "Which Yes2SDK modules does Yandex support, and which calls need an isSupported() guard?"
• Debugging: "window.Yes2SDK is undefined in my JS build. What's wrong?"

Troubleshooting Yes2SDK MCP Server

• Server not listed: In Claude Code, run /mcp and check that yes2sdk appears. If it doesn't, re-run the claude mcp add command above.
• Code won't compile against the SDK: Until the install steps finish, references to the Yes2SDK namespace (Unity), the yes2sdk module (Defold) or window.Yes2SDK (JS) won't resolve. Ask the assistant to run detect_sdk, then get_install_instructions.
• Validator can't read your build: The hosted server has no disk access. Pass inline content, or run the local @yes2games/yes2sdk-mcp package and use buildPath.
• A rule ID you don't recognize: Ask the assistant to look it up with get_compliance_rule for its severity and fix.