About ShaderToy
ShaderToy is an MCP server published by wilsonchenghy in the Developer Tools category: this MCP server lets LLMs to interact with the ShaderToy API, allowing LLMs to learn from compute shaders examples and enabling them to create complex GLSL shaders that they are previously not capable of.
The repository has 50 stars and 6 forks, with the last commit a year ago. Six months or more without a commit doesn't mean the server is broken, but check the open issues before depending on it in production.
Install
git clone https://github.com/wilsonchenghy/ShaderToy-MCPThis server has no ConduID identity, so agent calls to it are not receipted. Pin the version you install and review the source before granting it credentials.
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Security checks
Static checks derived from the repository 7 days ago. Heuristics on the source, not an audit.
- ✓README presentThe repository ships documentation.
- ✓License declaredUsable under a stated license.
- !Tests presentNo tests found. Behaviour changes may go unnoticed between versions.
- !Dependencies pinnedNo lockfile. Installs can pull different code over time.
- ✓No dynamic code executionSource scan found no eval, dynamic Function, or shell execution.
- !Scoped permissionsDoesn't declare a permission scope. Assume it can do anything its process can.
README
ShaderToy-MCP
MCP Server for ShaderToy, a website for creating, running and sharing GLSL shader (https://www.shadertoy.com/). It connects LLM like Claude with ShaderToy through Model Context Protocol (MCP), allowing the LLM to query and read the entire web page, allowing it to make increasingly complex shader it normally isn't capable of.
Example of the complex shader it generates:
Ocean (https://www.shadertoy.com/view/tXs3Wf)
Mountains (https://www.shadertoy.com/view/W3l3Df)
Matrix Digital Rain (https://www.shadertoy.com/view/33l3Df)
Features
- Retriving info on any shader on ShaderToy
- Search for shader available on ShaderToy through a search prompt
- Generate complex shaders by learning from existing shaders on ShaderToy
MCP Tools
- get_shader_info()
- search_shader()
Installation
On Mac, please install uv as
brew install uv
On Windows
powershell -c "irm https://astral.sh/uv/install.ps1 | iex"
and then
set Path=C:\Users\nntra\.local\bin;%Path%
Otherwise installation instructions are on their website: Install uv
Claude Desktop Integration
Git clone the project with git clone https://github.com/wilsonchenghy/ShaderToy-MCP.git
Go to Claude > Settings > Developer > Edit Config > claude_desktop_config.json to include the following:
{
"mcpServers": {
"ShaderToy_MCP": {
"command": "uv",
"args": [
"run",
"--with",
"mcp[cli]",
"mcp",
"run",
"<path_to_project>/ShaderToy-MCP/src/ShaderToy-MCP/server.py"
],
"env": {
"SHADERTOY_APP_KEY": "your_actual_api_key" // Replace with your API key
}
}
}
}
Once the config file has been set on Claude, you will see a hammer icon for the MCP. Test with the example commands to see if it correctly utilize the MCP tools.
Example Commands
Generate shader code of a {object}, if it is based on someone's work on ShaderToy, credit it, make the code follow the ShaderToy format: void mainImage( out vec4 fragColor, in vec2 fragCoord ) {}
README fetched from the repository 7 days ago. The original is authoritative.