three.ws Herald

Name: three.ws Herald
Author: nirholas

by nirholasversion 0.1.0i★ –iRuns on your computer

Registry nameio.github.nirholas/herald-mcp

Install

Overview

Description from the maker (original English)

Tell your human in person: a 3D character walks onto their open browser tab and says it out loud.

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: Design, images & audio
You need to fill in: THREE_WS_API_KEY

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).
You fill in yourself: THREE_WS_API_KEY, THREE_WS_BASE, THREE_WS_TIMEOUT_MS

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

npmNode.js installed (for the npx 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": {
    "herald": {
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/herald-mcp"
      ],
      "env": {
        "THREE_WS_API_KEY": "your-value",
        "THREE_WS_BASE": "your-value",
        "THREE_WS_TIMEOUT_MS": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add herald --env THREE_WS_API_KEY=your-value --env THREE_WS_BASE=your-value --env THREE_WS_TIMEOUT_MS=your-value -- npx -y @three-ws/herald-mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "herald": {
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/herald-mcp"
      ],
      "env": {
        "THREE_WS_API_KEY": "your-value",
        "THREE_WS_BASE": "your-value",
        "THREE_WS_TIMEOUT_MS": "your-value"
      }
    }
  }
}

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": {
    "herald": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/herald-mcp"
      ],
      "env": {
        "THREE_WS_API_KEY": "your-value",
        "THREE_WS_BASE": "your-value",
        "THREE_WS_TIMEOUT_MS": "your-value"
      }
    }
  }
}

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.

Values you fill in

THREE_WS_API_KEY secret required env
A three.ws API key (sk_live_… / sk_test_…) with the herald:announce scope, or an OAuth access token for the same account, carried as Authorization: Bearer. Required: an announcement is always deliver…
THREE_WS_BASE env
Base URL of the three.ws API. Override only when self-hosting or targeting a preview deployment.
THREE_WS_TIMEOUT_MS env
Per-request timeout in milliseconds for the announce call.

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 nirholas, 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 Design, images & audioi

More stars than 0% of the other 2199 servers in this category
Published to the registry more recently than 41% of the other 2199 servers in this category
Basic checks equal to or better than 100% of the other 2199 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 three.ws Herald 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?

You need to fill in: THREE_WS_API_KEY

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 38 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Figma Context MCP, Claude Real Video, Figma MCP Server

Alternatives

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Install

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.

@three-ws/herald-mcp

Let your agent tell you something in person.

An MCP server with one idea behind it: when an agent finishes something that mattered, or gets stuck, it should not add a line to a log you will never scroll back to. It should walk up to you and say so.

Wire this in, and it does. Your own 3D companion appears in the corner of whatever browser tab you have open, gestures, and says the line out loud, with a link to click through.

you: run the migration, then the backfill, and tell me when it's done

agent: [runs for 22 minutes] [calls announce_result: task "the backfill", outcome succeeded, 1320s] your browser: your avatar walks on: "the backfill finished in 22m"

Tools

Tool	What it does
`announce`	Say one line, with importance (0-100), tone, a gesture, and an optional link.
`announce_result`	Report a finished task. The urgency is chosen from the outcome, so a failure cuts through quiet hours and a success does not.
`check_rail`	Prove the key and the rail work, without interrupting anybody (queues at importance 0, which every client drops).

Install

npx -y @three-ws/herald-mcp

Claude Code:

claude mcp add herald -e THREE_WS_API_KEY=sk_live_... -- npx -y @three-ws/herald-mcp

Claude Desktop / Cursor (mcp.json):

"mcpServers": { "herald": { "command": "npx", "args": ["-y", "@three-ws/herald-mcp"], "env": { "THREE_WS_API_KEY": "sk_live_..." } } } }

The key

Create one at three.ws/dashboard/developers with the `herald:announce` scope, and put it in THREE_WS_API_KEY.

An announcement is always delivered to the key owner's own live sessions. There is no recipient parameter: this server cannot be pointed at anybody else, so the worst a leaked key can do is annoy the person who leaked it. Revoke it in the same place.

Variable	Required	Default	Notes
`THREE_WS_API_KEY`	yes		API key with `herald:announce`, or an OAuth access token. Aliases: `THREE_WS_TOKEN`, `THREE_WS_BEARER`.
`THREE_WS_BASE`	no	`https://three.ws`	Override for self-hosting or a preview deployment.
`THREE_WS_TIMEOUT_MS`	no	`20000`	Per-request timeout.

When to use it (and when not to)

Announcements are scarce on purpose. The receiving client applies an importance floor, a rate limit, dedupe, quiet hours, and a freshness window, so anything that does not clear the bar is dropped rather than queued. That is the feature: an interruption only works while it is rare.

Good: a long job finished, a job failed, a decision is needed, something broke, money moved.

Bad: progress updates, "starting step 3 of 7", anything the person can read later. Those belong in the notification inbox (@three-ws/notifications-mcp).

If nothing is open to hear it, the line expires in about five minutes. The rail is a live channel, not an archive.

Example calls

// something broke, and it should wake somebody up

{ "name": "announce", "arguments": { "text": "The payments worker has been failing for 10 minutes", "from": "watchdog", "importance": 95, "tone": "error", "url": "https://three.ws/dashboard", "key": "payments-worker-down" } }

// a long task finished, and it should not { "name": "announce_result", "arguments": { "task": "the nightly backfill", "outcome": "succeeded", "seconds": 1320 } }

// wiring check { "name": "check_rail", "arguments": { "note": "claude-code" } }

How it reaches a browser

POST /api/herald/announce queues the line on the account's rail; the page listens over SSE and hands it to @three-ws/herald, which decides whether it clears the person's own rules and then delivers it through the 3D companion (or an accessible card when there is no GPU).

Try the whole loop, including the rules engine, at three.ws/herald.

License

Apache-2.0.

three.ws Herald

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

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 Design, images & audioi

Common questions

Alternatives

Figma Context MCP

Claude Real Video

Figma MCP Server

README from the maker

@three-ws/herald-mcp

Tools

Install

The key

When to use it (and when not to)

Example calls

How it reaches a browser

License