Js8call MCP

Name: Js8call MCP
Author: qso-graph

by qso-graphversion 0.1.0i★ –iRuns on your computer

Registry nameio.github.qso-graph/js8call-mcp

Install

Overview

Description from the maker (original English)

JS8Call MCP server for HF messaging: decode stream, heard stations, message traffic

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Other

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
The registry lists no key to fill in.

You need

PyPIPython’s uv installed (for the uvx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "js8call": {
      "command": "uvx",
      "args": [
        "js8call-mcp"
      ]
    }
  }
}

Run this in your terminal

claude mcp add js8call -- uvx js8call-mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "js8call": {
      "command": "uvx",
      "args": [
        "js8call-mcp"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "js8call": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "js8call-mcp"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account qso-graph, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Otheri

More stars than 0% of the other 32684 servers in this category
Published to the registry more recently than 75% of the other 32684 servers in this category
Basic checks equal to or better than 100% of the other 32684 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Js8call MCP safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.0) reached the registry 11 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Python (uv) on your computer.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, Master CSS

Alternatives

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Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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Runs on your computer★ 440MITUpdated 14 months ago

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Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.

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Inspect Master CSS classes, generated CSS, and project stylesheets from your AI client.

Runs on your computerUpdated today

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

jt-mcp

Ask an AI app what WSJT-X is hearing. WSJT-X sends what it is doing and every decode to a UDP Server address; jt-mcp listens there and answers: who is calling CQ, and what kind of CQ (DX, POTA, a contest, a region), who has been heard and how well, what WSJT-X is tuned to, recent decodes and WSPR spots.

Read-only, permanently. jt-mcp never sends WSJT-X a message, so it cannot answer a call, key your transmitter or change a setting. No write, no PTT, no transmit control — a permanent constraint, not a first-version limit. The tests assert it against the source.

WSJT-X first, and WSJT-X defines the protocol. The UDP message definitions come from the WSJT-X project — Network/NetworkMessage.hpp, at the schema WSJT-X states — because the project that owns a definition is its authority. The code is qso-graph-lib's, the same that qso-graph-sim plays WSJT-X's messages with. JTDX, WSJT-Z and MSHV are supported where they work with those definitions, and where one does not, its difference is not implemented here. JS8Call, whose API is its own, follows WSJT-X.

This server was js8call-mcp until 2026-10-29. Part of the qso-graph project.

Install

uvx jt-mcp            # run it; nothing to install

Set up WSJT-X

In WSJT-X: File, Settings, Reporting, UDP Server: 127.0.0.1, port 2237 (WSJT-X's defaults). That is all jt-mcp needs when WSJT-X runs on the same PC.

Only one program can listen on a UDP port. If GridTracker, JTAlert or another logger already listens on 2237, give jt-mcp a different port (--udp-port) and point WSJT-X at that one.

Tools

Tool	Answers
`jt_cq`	Who is calling CQ, and what kind: plain, DX, activity (POTA, SOTA, WWFF, IOTA), contest (TEST, FD, RU, WW), region (NA, EU, ...), or a frequency (CQ 290). The latest per station
`jt_status`	What each WSJT-X is doing: dial frequency and band, mode, DX call and grid, Tx enabled or transmitting, your call and grid
`jt_decodes`	Recent decodes, each read into its parts (who is calling whom, grid, report, sign-off); filter by callsign, CQ only, SNR, band
`jt_heard`	Stations heard: how often, last SNR, last grid, mode and band
`jt_wspr`	WSPR spots WSJT-X decoded: call, grid, power, SNR, drift
`jt_diagnostics`	The listener: where it listens, who may send, what arrived, what was dropped and from where, each WSJT-X's version
`get_version_info`	Service version and status

Times are UTC. Several WSJT-X instances (two radios, two bands) are kept apart by the Id each sends, such as WSJT-X - FT-991A.

Questions it will answer

"Who's calling CQ POTA on 20 m right now?"

"Any DX calling CQ in the last ten minutes, strongest first?"

"Has W9XYZ been heard, and how strong?"

"What is WSJT-X tuned to, and is Tx enabled?"

"Why isn't anything showing up?" — jt_diagnostics

Configure your MCP client

jt-mcp works with any MCP-compatible client. Add the server and restart the client.

Claude Desktop

Add to claude_desktop_config.json (~/Library/Application Support/Claude/ on macOS, %APPDATA%\Claude\ on Windows):

"mcpServers": { "jt": { "command": "uvx", "args": ["jt-mcp"] } } }

Claude Code

claude mcp add jt -- uvx jt-mcp

ChatGPT Desktop

Configure via Settings > Apps & Connectors, or in your agent definition, with the same command and args as above.

WSJT-X on another PC

By default jt-mcp listens on 127.0.0.1, this PC alone. For WSJT-X on another PC, give one address of this PC with --bind, and name each PC that may send with --allow:

"args": ["jt-mcp", "--bind", "192.168.1.50", "--allow", "192.168.1.40"]

and set WSJT-X's UDP Server to 192.168.1.50. Listening on every interface at once (0.0.0.0) is refused, --allow is required with a network address, and names are not accepted, only IP addresses. A datagram from anyone else is dropped unread and counted, and jt_diagnostics shows the count and the addresses.

What the allow list does not do. It keeps other machines out. It is not proof of who sent: a UDP sender's address can be forged by anything on the same network. What contains that is that jt-mcp only reads, so a forged datagram can mislead about what WSJT-X is doing and cannot make anything happen.

Options

jt-mcp [--bind ADDR] [--allow ADDR ...] [--udp-port N]

[--transport stdio|streamable-http] [--port N] [--version] [--help]

Option	Default
`--bind ADDR`	`127.0.0.1`	where to listen for WSJT-X
`--allow ADDR`	this PC	a PC that may send; repeatable; required with a network `--bind`
`--udp-port N`	`2237`	WSJT-X's UDP Server port
`--transport`	`stdio`	`streamable-http` binds 127.0.0.1 only
`--port N`	`8031`	the streamable-http port

Licence

GPL-3.0-or-later. See LICENSE.

Js8call MCP

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

Master CSS

README from the maker

jt-mcp

Install

Set up WSJT-X

Tools

Questions it will answer

Configure your MCP client

Claude Desktop

Claude Code

ChatGPT Desktop

WSJT-X on another PC

Options

Licence