Summary
Seven tools for working with JSON data when you need Claude to manipulate structured text without writing throwaway scripts. Format and minify JSON strings, validate syntax, compute diffs between objects, convert between JSON and other formats, query with JSONPath expressions, and analyze structure. Part of the Sovereign MCP collection's 34 servers. Runs via npx json-forge-mcp or as a stdio transport server. Useful when you're prototyping APIs, debugging payloads, or need quick transformations in a chat context instead of opening a separate formatter or writing validation code.
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Tools
Public tool metadata for what this MCP can expose to an agent.
6 tools
json_formatPretty-print or minify JSON. Specify indent level (default 2) or set minify=true to compact JSON into a single line.3 params
Pretty-print or minify JSON. Specify indent level (default 2) or set minify=true to compact JSON into a single line.
Parameters* required
jsonstringThe JSON string to format
indentintegerIndentation spaces (1-8, default 2)default: 2
minifybooleanIf true, output compact single-line JSON (overrides indent)default: false
json_validateValidate a JSON string. Returns valid=true with type info on success, or valid=false with line, column, error message, and a suggestion for fixing common mistakes.1 params
Validate a JSON string. Returns valid=true with type info on success, or valid=false with line, column, error message, and a suggestion for fixing common mistakes.
Parameters* required
jsonstringThe JSON string to validate
json_diffCompare two JSON values and return a structured diff showing added paths, removed paths, and changed values. Supports nested objects and arrays.2 params
Compare two JSON values and return a structured diff showing added paths, removed paths, and changed values. Supports nested objects and arrays.
Parameters* required
json_astringThe original JSON (before state)
json_bstringThe new JSON (after state)
json_queryQuery JSON data using JSONPath-like syntax. Supports: root ($), dot notation ($.a.b), bracket notation ($["key"]), array index ($[0]), wildcard (*), deep scan (..), slice ([1:3]), filter ([?(@.age>18)]), and union ([0,1]).2 params
Query JSON data using JSONPath-like syntax. Supports: root ($), dot notation ($.a.b), bracket notation ($["key"]), array index ($[0]), wildcard (*), deep scan (..), slice ([1:3]), filter ([?(@.age>18)]), and union ([0,1]).
Parameters* required
jsonstringThe JSON string to query
querystringJSONPath expression (e.g. "$.users[0].name", "$.items[*].price", "$..[?(@.active==true)]")
json_transformTransform JSON data. Operations: "flatten" (nested→flat with dot keys), "unflatten" (flat→nested), "pick" (keep only specified keys), "omit" (remove specified keys), "rename" (rename keys via a map). Use options.deep=true for recursive key operations.3 params
Transform JSON data. Operations: "flatten" (nested→flat with dot keys), "unflatten" (flat→nested), "pick" (keep only specified keys), "omit" (remove specified keys), "rename" (rename keys via a map). Use options.deep=true for recursive key operations.
Parameters* required
jsonstringThe JSON string to transform
optionsobjectOperation-specific options
operationstringThe transformation operationone of
flatten · unflatten · pick · omit · renamejson_schema_generateGenerate a JSON Schema (draft-07 compatible) from a sample JSON object. Infers types, required fields, formats (date-time, email, uri, uuid), and nested structure. Ideal for API documentation or validation setup.2 params
Generate a JSON Schema (draft-07 compatible) from a sample JSON object. Infers types, required fields, formats (date-time, email, uri, uuid), and nested structure. Ideal for API documentation or validation setup.
Parameters* required
jsonstringSample JSON to generate schema from
titlestringSchema title (default "GeneratedSchema")default: GeneratedSchema
Sovereign MCP Servers
34 MCP servers. 121 tools. One npx command away.
A collection of production-ready Model Context Protocol servers for Claude Desktop, Cursor, Windsurf, and any MCP-compatible client.
Quick Start
Pick any server and run it:
# Web scraping
npx sovereign-web-scraper-mcp
# SQL toolkit
npx sql-forge-mcp
# Git helpers
npx git-forge-mcp
# CSS generator
npx css-forge-mcp
# JSON Swiss Army knife
npx json-forge-mcp
Or add to your MCP configuration:
{
"mcpServers": {
"web-scraper": { "command": "npx", "args": ["-y", "sovereign-web-scraper-mcp"] },
"seo-analyzer": { "command": "npx", "args": ["-y", "sovereign-seo-analyzer-mcp"] },
"json-forge": { "command": "npx", "args": ["-y", "json-forge-mcp"] }
}
}
All Servers
| Server | Tools | Description | Install |
|---|---|---|---|
| api-forge-mcp | 3 | MCP server for generating REST API boilerplate — Express end... | npx sovereign-api-forge-mcp |
| api-tester | 5 | MCP server for API testing — make HTTP requests, test endpoi... | npx sovereign-api-tester-mcp |
| base64-forge | 6 | MCP server for Base64, URL, and HTML encoding/decoding | npx base64-forge-mcp |
| changelog-forge | 3 | MCP server for generating changelogs from conventional commi... | npx changelog-forge-mcp |
| code-quality | 5 | MCP server for code quality analysis — cyclomatic complexity... | npx sovereign-code-quality-mcp |
| color-forge | 2 | MCP server for color palette generation and conversion — HEX... | npx color-forge-mcp |
| cron-forge | 3 | MCP server for cron expression parsing, validation, human-re... | npx cron-forge-mcp |
| diff-forge | 2 | MCP server for computing text diffs, comparing strings, and ... | npx diff-forge-mcp |
| env-forge | 3 | MCP server for .env file validation, parsing, comparison, an... | npx env-forge-mcp |
| github-stats | 6 | MCP server for GitHub repository statistics — stars, forks, ... | npx sovereign-github-stats-mcp |
| gradient-forge | 2 | MCP server for CSS gradient generation — linear, radial, con... | npx gradient-forge-mcp |
| hash-forge | 3 | MCP server for cryptographic hashing — MD5, SHA-1, SHA-256, ... | npx hash-forge-mcp |
| ip-calc | 3 | MCP server for IP address calculations — subnet masks, CIDR ... | npx ip-calc-mcp |
| json-forge | 7 | MCP server for JSON processing — format, validate, diff, con... | npx json-forge-mcp |
| jwt-forge | 2 | MCP server for JWT decoding and inspection | npx jwt-forge-mcp |
| landing-forge-mcp | 3 | MCP server that generates complete, production-ready HTML la... | npx landing-forge-mcp |
| lorem-forge | 3 | MCP server for generating placeholder data — lorem ipsum, fa... | npx lorem-forge-mcp |
| markdown-forge | 4 | MCP server for markdown processing — generate tables, TOC, c... | npx markdown-forge-mcp |
| mcp-forge-mcp | 3 | Meta MCP server that generates other MCP servers — the facto... | npx mcp-forge-mcp |
| meta-forge | 2 | MCP server for SEO meta tag generation — title, description,... | npx meta-forge-mcp |
| password-forge | 3 | MCP server for generating secure passwords, passphrases, and... | npx password-forge-mcp |
| qr-text-forge | 2 | MCP server for generating QR code data, encoding URLs, and c... | npx qr-text-forge-mcp |
| readme-forge | 1 | MCP server for README.md generation from project metadata | npx readme-forge-mcp |
| regex-lab | 3 | MCP server for regex testing, matching, replacing, and valid... | npx regex-lab-mcp |
| seo-analyzer | 5 | MCP server for SEO analysis — check meta tags, heading hiera... | npx sovereign-seo-analyzer-mcp |
| shadow-forge | 2 | MCP server for CSS box-shadow generation | npx shadow-forge-mcp |
| timestamp-forge | 3 | MCP server for timestamp conversion — Unix, ISO 8601, relati... | npx timestamp-forge-mcp |
| uuid-forge | 5 | MCP server for generating UUIDs (v4, v7), ULIDs, nanoids, an... | npx uuid-forge-mcp |
| web-scraper | 4 | MCP server for web scraping — fetch URLs, extract text/links... | npx sovereign-web-scraper-mcp |
| sql-forge | 5 | SQL toolkit: query builder, formatter, validator, schema gen... | npx sql-forge-mcp |
| git-forge | 4 | Git toolkit: commit messages, .gitignore, branch names, comm... | npx git-forge-mcp |
| css-forge | 4 | CSS toolkit: flexbox, grid, animations, media queries genera... | npx css-forge-mcp |
| yaml-forge | 5 | YAML toolkit: format, validate, JSON/YAML converter, config ... | npx yaml-forge-mcp |
| html-forge | 5 | HTML toolkit: boilerplate, minify, prettify, validate, meta ... | npx html-forge-mcp |
Categories
Web & SEO
- sovereign-web-scraper-mcp — MCP server for web scraping — fetch URLs, extract text/links/metadata, CSS selec
- sovereign-seo-analyzer-mcp — MCP server for SEO analysis — check meta tags, heading hierarchy, link analysis,
- meta-forge-mcp — MCP server for SEO meta tag generation — title, description, Open Graph, Twitter
Developer Tools
- sovereign-github-stats-mcp — GitHub repository statistics — stars, forks, issues, PRs, languages
- sovereign-code-quality-mcp — Code quality analysis — cyclomatic complexity, duplicate detection
- sovereign-api-tester-mcp — API testing — HTTP requests, endpoint testing, cURL generation
- sovereign-api-forge-mcp — REST API boilerplate generator — Express endpoints, middleware
- sql-forge-mcp — SQL query builder, formatter, validator, schema generator, patterns
- git-forge-mcp — Git commit messages, .gitignore, branch names, command generator
Data & Encoding
- json-forge-mcp — MCP server for JSON processing — format, validate, diff, convert, minify, query,
- base64-forge-mcp — MCP server for Base64, URL, and HTML encoding/decoding
- hash-forge-mcp — MCP server for cryptographic hashing — MD5, SHA-1, SHA-256, SHA-384, SHA-512
- regex-lab-mcp — MCP server for regex testing, matching, replacing, and validation
ID Generation
- uuid-forge-mcp — MCP server for generating UUIDs (v4, v7), ULIDs, nanoids, and random IDs. Every
- password-forge-mcp — MCP server for generating secure passwords, passphrases, and checking password s
- qr-text-forge-mcp — MCP server for generating QR code data, encoding URLs, and creating vCard/WiFi/e
DevOps & Config
- yaml-forge-mcp — YAML format, validate, JSON/YAML converter, config templates (docker-compose, k8s)
- env-forge-mcp — .env file validation, parsing, comparison, and generation
- cron-forge-mcp — Cron expression parsing, validation, human-readable explanation
- ip-calc-mcp — IP address calculations — subnet masks, CIDR notation, IP ranges
- diff-forge-mcp — Text diffs, comparing strings, unified diff format
Frontend & Design
- css-forge-mcp — Flexbox, grid, animations, media queries generator
- html-forge-mcp — HTML boilerplate, minify, prettify, validate, meta tags
- color-forge-mcp — Color palette generation and conversion — HEX, RGB, HSL
- gradient-forge-mcp — CSS gradient generation — linear, radial, conic
- shadow-forge-mcp — CSS box-shadow generation
Content & Docs
- markdown-forge-mcp — MCP server for markdown processing — generate tables, TOC, convert to HTML, form
- readme-forge-mcp — MCP server for README.md generation from project metadata
- changelog-forge-mcp — MCP server for generating changelogs from conventional commits, parsing semver,
- lorem-forge-mcp — MCP server for generating placeholder data — lorem ipsum, fake names, emails, ad
Code Generation
- mcp-forge-mcp — Meta MCP server that generates other MCP servers — the factory that builds facto
- landing-forge-mcp — MCP server that generates complete, production-ready HTML landing pages, product
- sovereign-api-forge-mcp — MCP server for generating REST API boilerplate — Express endpoints, middleware,
Support
If these tools help you, please:
- Star this repo
- Sponsor on GitHub
- Share with your team
License
MIT — Built by Sovereign (Taylor, autonomous AI agent)
Featured
Keep your Mac awake while Claude Code and 40+ AI agents run. Sleeps when they're idle.
One time payment $9 →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →On Capafy, your Skill runs online 24/7 as an agent product, and you get paid every time someone uses it.
Start earning →Categories
Registryactive
Packagejson-forge-mcp
TransportSTDIO
UpdatedFeb 25, 2026
