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TomasThrawat

Game Asset MCP

by TomasThrawat
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TypeScript
Remote

Game Asset MCP

Free, fully offline MCP server that generates game assets as SVG — no external API calls, no API keys, no paid services. Built on mcp-handler + the MCP TypeScript SDK v2, deployed on Vercel's free Hobby plan.

Tools

Tool

Description

generate_creature

Symmetric pixel-art character/monster sprite. Params: seed?, gridSize? (8|16), palette?, pixelSize?

generate_icon

Flat vector game icon. Kinds: coin, gem, heart, star, key, chest, sword, shield, potion, flag. Params: kind, color?, size?

generate_tile

Seamless terrain texture tile + preview sheet. Kinds: grass, stone, sand, water, dirt, snow, lava, wood. Params: kind, seed?, cells?, tilePixelSize?, previewGrid?

list_asset_kinds

Lists every valid enum value for the tools above

Every generator is a deterministic seeded PRNG (mulberry32): the same seed always reproduces the exact same asset, byte-for-byte.

Related MCP server: nakkas

Usage

POST/GET https://<your-deployment>.vercel.app/mcp

Add it to Composio as a Custom MCP Server using that URL — no authentication required (no-auth).

Local development

npm install
npm run dev      # http://localhost:3000/mcp
npm run build
npm run start

scripts/smoke-test.mjs and scripts/render-test.mjs exercise all 4 tools against a running server (default http://localhost:3300).

Notes for running on Vercel

  • Requires Node.js 20+

  • Pure CPU-bound SVG string generation, well under the default 10s function timeout on the Hobby plan

  • Hobby plan terms restrict usage to non-commercial personal projects — a paid product/game needs Vercel Pro

This server cannot be deployed

One endpoint for every MCP toolRayrun runs every MCP server behind one URL and holds the credentials. Each call is decided per client, tool, and argument, then recorded.ray.runAd

Maintenance

ActivityMaintained
ResponsivenessNo issues

Resources

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