Hmr MCP Server

by promplate Your server? Claim it

not responding

Hmr is listed as active in the registry but did not answer our last check. It exposes 3 tools. Last commit 2 Aug 2026.

Docs for hot-module-reload and reactive programming for Python (`hmr` on PyPI)

Uptime history 91 days of history · worst day 0%

91 days agonow

0.0%

Uptime 24h

0 of 92 checks

Tools

read from the server

105 ms

Response time

average over 24h

Stars

last commit 2 Aug 2026

Hmr does not always answer

Over the last week it answered 0.2% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 0 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add hmr --transport http https://pyth-on-line.promplate.dev/hmr/mcp

Settings → Connectors → Add custom connector, then paste this address

https://pyth-on-line.promplate.dev/hmr/mcp

~/.codex/config.toml

[mcp_servers.hmr]
url = "https://pyth-on-line.promplate.dev/hmr/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "hmr": {
      "url": "https://pyth-on-line.promplate.dev/hmr/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "hmr": {
      "type": "http",
      "url": "https://pyth-on-line.promplate.dev/hmr/mcp"
    }
  }
}

Available tools 3

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

view

view-hmr-core-sources

The full source code (core only) of the HMR library. Always call `learn-hmr-concepts` to learn the core concepts before calling this tool. These files are the full source code of the HMR library, which would be very helpful because good code are self-documented. For a brief and concise explanation, please refer to the `hmr-docs://about` MCP resource. Make sure you've read it before calling this tool. To learn how to use HMR for reactive programming, read the unit tests later. The response is identical to the MCP resource with the same name. Only use it once and prefer this tool to that resource if you can choose.

view-hmr-unit-tests

The unit tests (code examples) for HMR. Always call `learn-hmr-basics` and `view-hmr-core-sources` to learn the core functionality before calling this tool. These files are the unit tests for the HMR library, which demonstrate the best practices and common coding patterns of using the library. You should use this tool when you need to write some code using the HMR library (maybe for reactive programming or implementing some integration). The response is identical to the MCP resource with the same name. Only use it once and prefer this tool to that resource if you can choose.

learn

learn-hmr-basics

A brief and concise explanation of the `hmr` library. This tool provides information on how to use reactive programming or use hot module reloading in Python. As long as the user mentions HMR / Reactive Programming, this tool must be called first! Don't manually view the resource, call this tool instead.

Endpoints

URL	Transport	State	Latency	Checked
https://pyth-on-line.promplate.dev/hmr/mcp	streamable-http	answering	105 ms	0 min ago

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Hmr — questions

Answers built from our own checks of this server.

What can Hmr do?

It exposes 3 tools, read directly from the server on our last check. Among them: learn-hmr-basics, view-hmr-core-sources, view-hmr-unit-tests. 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 Hmr working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 0 of 92 checks got a reply (0.0%), average response time 105 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 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 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. All 3 of them are readable on this page. This is what we observed, not what the docs claim.

Is Hmr open source?

We cannot say either way: written in Python, 60 stars on GitHub and 12 open issues, but we could not determine the licence, and without one the code is not open source by default.