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Harny MCP Server

answering

Harny is answering right now. Last checked 7 min ago. It exposes 1 tools. Last commit 11 Nov 2026.

Per-user memory, connected accounts, permitted actions and the action record for your agents.

Uptime history 14 hours of history
14 hours agonow
100.0%
Uptime 24h
49 of 49 checks
1
Tools
read from the server
378 ms
Response time
average over 24h
0
Stars
last commit 11 Nov 2026

Nothing serious here today

Today is the operative word: we check Harny every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 7 min ago.

run in your terminal
claude mcp add harness --transport http https://mcp.harny.ai
Settings → Connectors → Add custom connector, then paste this address
https://mcp.harny.ai
~/.codex/config.toml
[mcp_servers.harness]
url = "https://mcp.harny.ai"
.cursor/mcp.json
{
  "mcpServers": {
    "harness": {
      "url": "https://mcp.harny.ai"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "harness": {
      "type": "http",
      "url": "https://mcp.harny.ai"
    }
  }
}

Available tools 1

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

provision
provision_app
Set up Harny for an app with no account: memory, connected accounts, actions and the action record behind one key; makes a new app and its key, as `POST /v1/auth/provision` does. The answer carries the app key once, and the assistant is told to put it in the owner's secret store and nowhere else. Needs no key.

Endpoints

URLTransportStateLatencyChecked
https://mcp.harny.ai streamable-http answering 434 ms 7 min ago

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Harny — questions

Answers built from our own checks of this server.

What can Harny do?
It exposes 1 tools, read directly from the server on our last check. Among them: provision_app. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is Harny working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 49 of 49 checks got a reply (100.0%), average response time 378 ms. The bar chart above shows every period we have measured.
How do I connect Harny?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Harny need an API key?
No. Harny completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 1 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Harny?
It answers our handshake in 378 ms on average, which is faster than 36% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is Harny open source?
The code is open source: it is published under the Apache-2.0 licence and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at mcp.harny.ai, which runs on its operator's own terms.