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Hmr MCP Server

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Hmr is listed as active in the registry but did not answer our last check. Last commit 22 Sep 2026.

Hot Module Reload (HMR) for Python with reactive programming and MCP tools

Uptime history 51 days of history · worst day 0%
51 days agonow
0.0%
Uptime 24h
0 of 90 checks
Tools
hidden behind auth
27 ms
Response time
average over 24h
18
Stars
last commit 22 Sep 2026

What the code does

We read the source, 9 h ago · rules 3dff92dd89df

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

            exec(code, self.__namespace, self.__namespace_proxy)  # https://github.com/python/cpython/issues/121306

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

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 15 min ago.

run in your terminal
claude mcp add hmr --transport http https://promplate.github.io/pyth-on-line/hmr/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "hmr": {
      "url": "https://promplate.github.io/pyth-on-line/hmr/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.hmr]
url = "https://promplate.github.io/pyth-on-line/hmr/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "hmr": {
      "url": "https://promplate.github.io/pyth-on-line/hmr/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "hmr": {
      "url": "https://promplate.github.io/pyth-on-line/hmr/mcp"
    }
  }
}

Endpoints

URLTransportStateLatencyChecked
https://promplate.github.io/pyth-on-line/hmr/mcp streamable-http answering 27 ms 15 min ago

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Hmr — questions

Answers built from our own checks of this server.

Is Hmr working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 0 of 90 checks got a reply (0.0%), average response time 27 ms. The bar chart above shows every period we have measured.
The registry lists Hmr as active — why does it not respond?
The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.
How do I connect Hmr?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Hmr need an API key?
No. Hmr completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. This is what we observed, not what the docs claim.
Is Hmr open source?
We cannot say either way: written in Python, 18 stars on GitHub and 67 open issues, but we could not determine the licence, and without one the code is not open source by default.