JSON Tools MCP Server

by mrfentmen Your server? Claim it

local only

JSON Tools MCP runs on your own machine — the client starts it, so there is no endpoint to ping.

Validate, format, and inspect JSON locally. No network and no key.

The linked repository no longer exists on GitHub — it was deleted or made private.

—

Installs / week

npm · json-tools-mcp

—

Stars

on GitHub

—

Last commit

0 releases in 90 days

—

License

language unknown

This one has been quiet for a while

Quiet is not dead — but it is worth knowing when it wakes up, or when someone else takes it over. We watch the repository and tell you either way.

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 json-tools-mcp -- npx -y json-tools-mcp

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

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

~/.codex/config.toml

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

.cursor/mcp.json

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

.vscode/mcp.json

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

Alternatives to JSON Tools MCP

same job, measured the same way

Uuid MCP

by mrfentmen

Generate UUIDs and validate formats locally. No network and no key.

local only

Iban Validator MCP

by mrfentmen

Validate and format IBAN bank account numbers locally. No network and no key.

local only

Phone Validator MCP

by mrfentmen

Validate and format international phone numbers locally. No network and no key.

local only

CSV MCP

by mrfentmen

Parse, filter, and inspect CSV data locally. No network and no key.

local only

YAML MCP

by mrfentmen

Parse, stringify, and validate YAML locally. No network and no key.

local only

SQL Formatter MCP

by mrfentmen

Format SQL queries into readable layouts locally. No network and no key.

local only

JWT Tools MCP

by mrfentmen

Decode and verify JSON Web Tokens locally. No network and no key.

local only

Scrabble MCP

by mrfentmen

Score words and find valid plays for Scrabble locally. No network and no key.

local only

JSON Tools MCP — questions

Answers built from our own checks of this server.

Why is there no uptime for JSON Tools MCP?

JSON Tools MCP 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 json-tools-mcp.

Is JSON Tools MCP still maintained?

The linked repository no longer exists on GitHub — it was deleted or made private. We show this because it changes what you can expect: an unmaintained server may keep answering for months and then stop without warning.

How do I connect JSON Tools MCP?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It runs locally, so the command pulls json-tools-mcp straight from npm; nothing to host, nothing to sign up for.