AI Plugin Index
Eharness
Verified · npm:eharnessMCP server by viandwi24 · updated · ★ 3 · 382 downloads a week
Build your own agent harness on AI SDK v7: plugins, context, messages, streaming, sessions, compaction. Eharness is published by npm:eharness 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, original repository
Not checked yet. What we check
Install Eharness
Built from the published package, never by AIclaude mcp add eharness -- npx -y eharnessRun in your terminal. Add --scope user to use it in every project.
{
"mcpServers": {
"eharness": {
"command": "npx",
"args": [
"-y",
"eharness"
]
}
}
}Settings, Developer, Edit config. Paste into claude_desktop_config.json and restart.
{
"mcpServers": {
"eharness": {
"command": "npx",
"args": [
"-y",
"eharness"
]
}
}
}Add to ~/.cursor/mcp.json (all projects) or .cursor/mcp.json (this project).
{
"servers": {
"eharness": {
"command": "npx",
"args": [
"-y",
"eharness"
]
}
}
}Add to .vscode/mcp.json. VS Code uses "servers", not "mcpServers".
codex mcp add eharness -- npx -y eharness{
"mcpServers": {
"eharness": {
"command": "npx",
"args": [
"-y",
"eharness"
]
}
}
}Add to ~/.gemini/config/mcp_config.json (all projects) or .agents/mcp_config.json (this project).
gemini mcp add eharness npx -y eharnessGemini 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 eharness block.
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Eharness: common questions
How do I install Eharness?
In Claude Code run claude mcp add eharness -- npx -y eharness. For Claude Desktop, Cursor and VS Code, paste the config shown above and restart. See the install guides.
Is Eharness the official server?
Eharness is published by npm:eharness from its verified domain in the official MCP Registry.
Is Eharness free?
The code is published under the MIT licence. The service it connects to may have its own pricing.
Is Eharness safe to use?
It scores 78 of 100. Grades: maintenance A, licence A, quality C. The security check has not run for it yet. Review the code before you install. How grades work.
What are alternatives to Eharness?
Similar MCP servers: Vexa, Agent-Native Chat, Agent-Native Mail, QR Rápido.
Does Eharness 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.