Json Forge Mcp

io.github.ryudi84Published by GitHub account ryudi84v1.0.1Updated Oct 24, 2026

JSON processing — format, validate, diff, convert, minify, query, analyze

VerifiedSTDIODesktop onlyDeveloper ToolsData & Analytics

Overview

AI-generated overview

A local MCP server that gives an assistant seven JSON utilities: format, validate, diff, convert, minify, query and analyze JSON data.

What you can do
  • Format and minify JSON, with compression stats for minified output
  • Validate JSON and get a detailed structure report
  • Compare two JSON objects and show their differences
  • Convert JSON to YAML, CSV, XML, TOML or TypeScript
  • Extract values with dot-notation paths and analyze type, depth, key count, size and structure tree
When to use it
Useful when you work with JSON payloads, config files or API responses and want the assistant to clean them up, check them, compare versions, pull out fields or turn them into another format without leaving the chat.
Requirements
Runs as a local stdio process, typically launched with npx json-forge-mcp, so Node.js and npm are needed. No accounts, API keys or environment variables are declared.
Before you install
The README's example tool names (json_format, json_diff) differ from the tool table (format_json, diff_json), so tool names may not match documentation. JSON you pass in is processed by the local process; no third-party data transfer is described.

Installation

In SourceWeft

  1. Open Json Forge 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

json-forge-mcp

[npm version] [npm downloads] [License: MIT] [MCP]

Swiss Army knife for JSON. Format, validate, diff, query, convert.

7 powerful JSON tools in one server. Format messy JSON, validate against schemas, diff two objects, query with JSONPath, convert to CSV/YAML.

Quick Start

bash
npx json-forge-mcp

Claude Desktop / Cursor / Windsurf

Add to your MCP configuration:

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

Tools (7)

ToolDescription
format_jsonPretty-print JSON with 2-space indentation
validate_jsonValidate JSON and return a detailed structure report
diff_jsonCompare two JSON objects and show differences
convert_jsonConvert JSON to another format: yaml, csv, xml, toml, or typescript
minify_jsonMinify JSON by removing all whitespace. Returns minified output and compression stats.
query_jsonExtract data from JSON using dot-notation path (e.g.
analyze_jsonAnalyze JSON structure: type, depth, key count, size, and structure tree

Examples

Format JSON:

json
{  "tool": "json_format",  "arguments": {"json": "{\"a\":1,\"b\":[2,3]}"}}

Diff objects:

json
{  "tool": "json_diff",  "arguments": {"json1": "{\"a\":1}", "json2": "{\"a\":2,\"b\":3}"}}

Build from Source

bash
git clone https://github.com/ryudi84/sovereign-mcp-serverscd sovereign-mcp-servers/json-forgenpm install && npm run buildnpm start

Part of the Sovereign MCP Suite

This is one of 34 MCP servers with 121 tools built by Sovereign.

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Contentmarkdown-forge, readme-forge, changelog-forge
Metamcp-forge (builds MCP servers from specs!)

License

MIT

Built by Sovereign (Taylor, autonomous AI agent)

If this helped you, please star the repo and consider sponsoring!

Source: json-forge/README.md at commit da6bbcc

Tools

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

Version history

1
  1. v1.0.1LatestSep 16, 2026

Score

40% 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

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  • 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
  • License10 pts

    Declare a license in the repository or the registry entry.