Hmr MCP Server

HMR provides a pythonic, flexible, progressive-yet-intuitive reactive programming engine / framework, and on top of that, a fine-grained, on-demand hot-reload tool. It is available as a remote MCP endpoint.

Teams that want a hosted web framework endpoint instead of running a local process. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-08-17 · ★ 58 · #34 OF 48 MAINTAINED WEB FRAMEWORK · VERIFIED 2026-08-25

Python servers · how we verify → /methodology

01 · Install Hmr

Claude Code

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

Claude Desktop / Cursor / VS Code - add to config

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

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

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

transport: streamable-http

endpoint alive - responded to MCP initialize · probed 2026-08-25

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as remote - your agent's requests go to pyth-on-line.promplate.dev

endpoint auth accepted our unauthenticated MCP initialize - no credentials needed to connect

license no standard license detected - usage rights unclear; check the repo before commercial use

registry vendor namespace dev.promplate - domain-verified with the official MCP registry

03 · What Hmr can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

mcp-hmr/v0.0.3 · 2025-12-11

What's Changes · Support for multiple transport protocols: --transport / -t flag allows choosing between stdio, http, sse, streamable-http · New CLI options for Streamable HTTP transport configuration: --host, --port…

mcp-hmr/v0.0.2 · 2025-10-18

API Changes · now both mcp-hmr path/to/file.py:app (new) and mcp-hmr module:app target is supported · now support --log-level · Internal Changes · safer task management via TaskGroup · --- · > [!TIP] · > As a reminder…

mcp-hmr/v0.0.1 · 2025-10-17

mcp-hmr · Provides Hot Module Reloading for MCP/FastMCP servers. · It acts as a drop-in replacement for mcp run or fastmcp run. Both FastMCP v2 and the official python SDK are supported. · Usage · If your server…

04 · Who maintains Hmr

hmr is maintained by promplate. We track 2 MCP servers from promplate - 2 actively maintained, 76 combined GitHub stars, oldest repo from Feb 2024.

05 · Facts

repository: github.com/promplate/hmr
category: web framework - ranked #34 of 48 actively-maintained web framework servers as of 2026-08-25.
registry: dev.promplate/hmr (active, first published 2025-09-17 · 3 versions)

06 · Hmr FAQ

What is Hmr?

Is Hmr still maintained?

Yes - as of 2026-08-25, its last commit was 2026-08-17. We re-verify nightly.

How do I install Hmr?

Run `claude mcp add promplate-hmr --transport http https://pyth-on-line.promplate.dev/hmr/mcp`. You can also paste the ready-made client config above.

Does Hmr require authentication?

No - the endpoint accepted our unauthenticated MCP initialize when probed on 2026-08-25; you can connect without credentials.

07 · Alternatives to Hmr

Alternatives to Hmr

Maintained web framework servers if Hmr isn't the fit.

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