AI Plugin Index
Kernel
Verified · npm:@metaharnessMCP server by ruvnet · updated · ★ 709 · 1.3k downloads a week
Cross-platform kernel for the agent-harness-generator — wasm primary, NAPI-RS native fallback Kernel is published by npm:@metaharness from its verified domain in the official MCP Registry.
Last commit 2 days ago
MIT: permissive, fine for commercial use
Clear description, published package or server URL, 709 stars, original repository
No risky patterns in the files we checked
Install Kernel
Built from the published package, never by AIclaude mcp add kernel -- npx -y @metaharness/kernelRun in your terminal. Add --scope user to use it in every project.
{
"mcpServers": {
"kernel": {
"command": "npx",
"args": [
"-y",
"@metaharness/kernel"
]
}
}
}Settings, Developer, Edit config. Paste into claude_desktop_config.json and restart.
{
"mcpServers": {
"kernel": {
"command": "npx",
"args": [
"-y",
"@metaharness/kernel"
]
}
}
}Add to ~/.cursor/mcp.json (all projects) or .cursor/mcp.json (this project).
{
"servers": {
"kernel": {
"command": "npx",
"args": [
"-y",
"@metaharness/kernel"
]
}
}
}Add to .vscode/mcp.json. VS Code uses "servers", not "mcpServers".
codex mcp add kernel -- npx -y @metaharness/kernel{
"mcpServers": {
"kernel": {
"command": "npx",
"args": [
"-y",
"@metaharness/kernel"
]
}
}
}Add to ~/.gemini/config/mcp_config.json (all projects) or .agents/mcp_config.json (this project).
gemini mcp add kernel npx -y @metaharness/kernelGemini CLI was replaced by Antigravity CLI in June 2026 and remains only for enterprise licences and paid API keys.
MCP servers run with your permissions and can read what you give them access to. Some need an API key: check the README and add it under env in the kernel block.
Security check
ANo download-and-run commands, hidden instructions or signs of sending keys out were found.
Checked automatically: README.md, package.json. This looks for known risky patterns and is not a full audit. How grades work
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Kernel: common questions
How do I install Kernel?
In Claude Code run claude mcp add kernel -- npx -y @metaharness/kernel. For Claude Desktop, Cursor and VS Code, paste the config shown above and restart. See the install guides.
Is Kernel the official server?
Kernel is published by npm:@metaharness from its verified domain in the official MCP Registry.
Is Kernel free?
The code is published under the MIT licence. The service it connects to may have its own pricing.
Is Kernel safe to use?
It scores 86 of 100. Grades: maintenance A, licence A, quality A. Security check: grade A, no risky patterns found in the files checked. Review the code before you install. How grades work.
What are alternatives to Kernel?
Similar MCP servers: Harness, MCP Registry Server, ref-tools-ref-tools-mcp, Microsoft Learn MCP.
Does Kernel work with ChatGPT?
Not directly. It runs locally, and ChatGPT only connects to remote servers with a URL. Use it in Claude Code, Claude Desktop, Cursor, VS Code or Codex.