AI Plugin Index
Metaharness
Verified · npm:metaharnessMCP server by ruvnet · updated · ★ 709 · 31k downloads a week
MetaHarness — mint a custom AI agent harness from any repo. Browser Studio + `npx metaharness` CLI. Runs on Claude Code, Codex, pi.dev, Hermes, OpenClaw, RVM, Prime Agent. Metaharness is published by npm:metaharness from its verified domain in the official MCP Registry.
Last commit in the past day
MIT: permissive, fine for commercial use
Clear description, published package or server URL, 709 stars, original repository
Not checked yet. What we check
Install Metaharness
Built from the published package, never by AIclaude mcp add metaharness -- npx -y metaharnessRun in your terminal. Add --scope user to use it in every project.
{
"mcpServers": {
"metaharness": {
"command": "npx",
"args": [
"-y",
"metaharness"
]
}
}
}Settings, Developer, Edit config. Paste into claude_desktop_config.json and restart.
{
"mcpServers": {
"metaharness": {
"command": "npx",
"args": [
"-y",
"metaharness"
]
}
}
}Add to ~/.cursor/mcp.json (all projects) or .cursor/mcp.json (this project).
{
"servers": {
"metaharness": {
"command": "npx",
"args": [
"-y",
"metaharness"
]
}
}
}Add to .vscode/mcp.json. VS Code uses "servers", not "mcpServers".
codex mcp add metaharness -- npx -y metaharness{
"mcpServers": {
"metaharness": {
"command": "npx",
"args": [
"-y",
"metaharness"
]
}
}
}Add to ~/.gemini/config/mcp_config.json (all projects) or .agents/mcp_config.json (this project).
gemini mcp add metaharness npx -y metaharnessGemini 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 metaharness block.
Alternatives to Metaharness
All alternatives →
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Metaharness: common questions
How do I install Metaharness?
In Claude Code run claude mcp add metaharness -- npx -y metaharness. For Claude Desktop, Cursor and VS Code, paste the config shown above and restart. See the install guides.
Is Metaharness the official server?
Metaharness is published by npm:metaharness from its verified domain in the official MCP Registry.
Is Metaharness free?
The code is published under the MIT licence. The service it connects to may have its own pricing.
Is Metaharness safe to use?
It scores 92 of 100. Grades: maintenance A, licence A, quality A. The security check has not run for it yet. Review the code before you install. How grades work.
What are alternatives to Metaharness?
Similar MCP servers: browser-use, Actionbook, Cline, Scrapling MCP Server.
Does Metaharness 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.