Emerald MCP Server

by kfireliyahu Your server? Claim it

local only

Emerald runs on your own machine — the client starts it, so there is no endpoint to ping. 403 installs a week from npm. Last commit 24 Oct 2026.

The database under the chat: a local SQLite file a model asks for rows, not notes to re-read.

Installs per day peak 800 · avg 26

a month agotoday

403

Installs / week

npm · emerald-mcp

Stars

0 open issues

24 Oct 2026

Last commit

8 releases in 90 days

AGPL-3.0

License

TypeScript

What the code does

We read the source, 23 h ago · rules 995398eba69f

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.

File ships in the package but is absent from the source [пакет] status-line.mjs:1

этот файл ставится пользователю, но в репозитории его нет

Runs an external command hosts/claude/hooks/statusLineMain.ts:56

    spawn(process.execPath, [hooks, 'status', document], { detached: true, stdio: 'ignore', windowsHide: true }).unref()

Builds a database query by concatenation src/data/repositories/documentTemplateRepository.ts:70, src/data/repositories/importMappingRepository.ts:65, src/data/repositories/institutionRepository.ts:64

  return decodeAll(db, query(db, SELECT + CURRENT + filter + ORDER, parameters))

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.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add emerald -- npx -y emerald-mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "emerald": {
      "command": "npx",
      "args": [
        "-y",
        "emerald-mcp"
      ]
    }
  }
}

~/.codex/config.toml

[mcp_servers.emerald]
command = "npx"
args = ["-y", "emerald-mcp"]

.cursor/mcp.json

{
  "mcpServers": {
    "emerald": {
      "command": "npx",
      "args": [
        "-y",
        "emerald-mcp"
      ]
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "emerald": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "emerald-mcp"
      ]
    }
  }
}

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Emerald — questions

Answers built from our own checks of this server.

Why is there no uptime for Emerald?

Emerald runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package emerald-mcp was installed 403 times last week.

How do I connect Emerald?

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 runs locally, so the command pulls emerald-mcp straight from npm; nothing to host, nothing to sign up for.

How many people use Emerald?

The npm package emerald-mcp was installed 403 times in the last week. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is Emerald open source?

Yes — it is published under the AGPL-3.0 licence, written in TypeScript and 2 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.