Jsonc MCP Server

by mrfentmen Your server? Claim it

local only

Jsonc MCP runs on your own machine — the client starts it, so there is no endpoint to ping. 533 installs a week from npm. Last commit 28 Oct 2026.

Work with JSONC offline: strip comments and trailing commas, parse to JSON and locate errors

Installs per day peak 449 · avg 17

a month agotoday

533

Installs / week

npm · @mrfentmen/jsonc-mcp

Stars

0 open issues

28 Oct 2026

Last commit

from GitHub

—

License

TypeScript

Nothing serious here today

Today is the operative word: we check Jsonc MCP every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

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 jsonc-mcp -- npx -y @mrfentmen/jsonc-mcp

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

{
  "mcpServers": {
    "jsonc-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@mrfentmen/jsonc-mcp"
      ]
    }
  }
}

~/.codex/config.toml

[mcp_servers.jsonc-mcp]
command = "npx"
args = ["-y", "@mrfentmen/jsonc-mcp"]

.cursor/mcp.json

{
  "mcpServers": {
    "jsonc-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@mrfentmen/jsonc-mcp"
      ]
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "jsonc-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@mrfentmen/jsonc-mcp"
      ]
    }
  }
}

Alternatives to Jsonc MCP

same job, measured the same way

Json5 MCP

by mukundakatta

Parse JSON5 (comments, trailing commas, unquoted keys) and emit strict JSON.

40 installs/wk local only

Stripe

by mcp-dir

Payments and billing on Stripe with the full official REST API (api.stripe.com), covers the entire d

7 tools answering

Jsondiff MCP

by mrfentmen

Compare two JSON documents and apply RFC 6902 JSON Patch offline, with canonical output

554 installs/wk local only

CSV Tools MCP

by mrfentmen

CSV work offline: column summary with detected types, rows as JSON, and simple filtering by column

440 installs/wk local only

Jsonschema MCP

by mrfentmen

Validate JSON against a JSON Schema offline, with a clear list of every structural error

544 installs/wk local only

Uri MCP

by mrfentmen

URL and encoding work offline: parse a URL, percent-encode or decode text, and convert base64 both

603 installs/wk local only

Ini MCP

by mrfentmen

Parse, validate, convert and generate INI configuration offline: sections, comments, quotes

548 installs/wk local only

XML MCP

by mrfentmen

Parse, validate and convert XML offline with a real parser: entities, CDATA, attributes

538 installs/wk local only

Jsonc MCP — questions

Answers built from our own checks of this server.

Why is there no uptime for Jsonc MCP?

Jsonc 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 @mrfentmen/jsonc-mcp was installed 533 times last week.

How do I connect Jsonc MCP?

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 @mrfentmen/jsonc-mcp straight from npm; nothing to host, nothing to sign up for.

How many people use Jsonc MCP?

The npm package @mrfentmen/jsonc-mcp was installed 533 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 Jsonc MCP open source?

We cannot say either way: written in TypeScript and 0 stars on GitHub, but we could not determine the licence, and without one the code is not open source by default.