Json Tools Mcp

io.github.mrfentmenPublished by GitHub account mrfentmenv1.0.0Updated Oct 24, 2026

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

VerifiedSTDIODesktop onlyDeveloper Tools

Overview

AI-generated overview

A local MCP server that lets an assistant validate, format and inspect JSON, running entirely on the user's machine with no network or key.

What you can do
Validate JSON and report whether it is well formed, with errors where available. Format or pretty-print JSON into a readable layout. Inspect JSON structure to examine its contents. All processing happens locally on the user's machine.
When to use it
Useful when an assistant works with JSON payloads, config files or API responses and needs to check validity, tidy formatting or look at structure without sending data to an outside service.
Requirements
Runs as a local stdio process installed from the npm package json-tools-mcp, so Node.js and npm are needed. No authentication, environment variables or network access are declared. Desktop only.
Before you install
The manifest lists no tools, so the exact operations and whether any of them modify files cannot be confirmed from the available information. No credentials, payments or third-party data transfer are indicated.

Installation

In SourceWeft

  1. Open Json Tools Mcp in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Other MCP clients

Follow the launch instructions in the repository.

README

This repository has no README.

Tools

0
SourceWeft has not started this package in its sandbox yet, so its tools are not known.

Version history

1
  1. v1.0.0LatestSep 22, 2026

Score

25% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 days25 pts

    Keep the endpoint answering the MCP handshake; SourceWeft probes it every 30 days.

  • Auth declared10 pts

    Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.

  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • License10 pts

    Declare a license in the repository or the registry entry.