AI Plugin Index
Harness
Verified · harness.autonomous.aiMCP server by autonomous-ai · updated · ★ 1.3k
Start Claude Code and Codex agents the person can watch, wait for them and read their answers. Harness is published by harness.autonomous.ai 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, 1,320 stars, original repository
Not checked yet. What we check
Install Harness
Built from the published package, never by AIclaude mcp add harness -- npx -y @autonomous-ai/harness-mcpRun in your terminal. Add --scope user to use it in every project.
{
"mcpServers": {
"harness": {
"command": "npx",
"args": [
"-y",
"@autonomous-ai/harness-mcp"
]
}
}
}Settings, Developer, Edit config. Paste into claude_desktop_config.json and restart.
{
"mcpServers": {
"harness": {
"command": "npx",
"args": [
"-y",
"@autonomous-ai/harness-mcp"
]
}
}
}Add to ~/.cursor/mcp.json (all projects) or .cursor/mcp.json (this project).
{
"servers": {
"harness": {
"command": "npx",
"args": [
"-y",
"@autonomous-ai/harness-mcp"
]
}
}
}Add to .vscode/mcp.json. VS Code uses "servers", not "mcpServers".
codex mcp add harness -- npx -y @autonomous-ai/harness-mcp{
"mcpServers": {
"harness": {
"command": "npx",
"args": [
"-y",
"@autonomous-ai/harness-mcp"
]
}
}
}Add to ~/.gemini/config/mcp_config.json (all projects) or .agents/mcp_config.json (this project).
gemini mcp add harness npx -y @autonomous-ai/harness-mcpGemini 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 harness block.
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Harness: common questions
How do I install Harness?
In Claude Code run claude mcp add harness -- npx -y @autonomous-ai/harness-mcp. For Claude Desktop, Cursor and VS Code, paste the config shown above and restart. See the install guides.
Is Harness the official server?
Harness is published by harness.autonomous.ai from its verified domain in the official MCP Registry.
Is Harness free?
The code is published under the MIT licence. The service it connects to may have its own pricing.
Is Harness safe to use?
It scores 95 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 Harness?
Similar MCP servers: ref-tools-ref-tools-mcp, Microsoft Learn MCP, Nhost, Agent-Native Slides.
Does Harness 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.