Pricing

Pay per usage

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xsantcastx MCP Server

Try for free

14 developer tools for AI agents: JSON format, UUID, JWT, regex, hash, WCAG contrast, cron, and more. Zero API calls.

Pricing

Pay per usage

Rating

0.0

(0)

Developer

Santiago castrillon

Actor stats

Bookmarked

Total users

Monthly active users

2 days ago

Last modified

Tools Available

Tool	Description
`json_format`	Format, minify, validate, or analyze JSON
`json_schema_generate`	Generate JSON Schema from sample data (Draft 4/7/2020-12)
`uuid_generate`	Generate UUIDs v4 (bulk, multiple formats)
`uuid_validate`	Validate and inspect UUID strings
`base64_encode`	Encode text to Base64 (standard or URL-safe)
`base64_decode`	Decode Base64 to text
`jwt_decode`	Decode JWT tokens (header, payload, expiration)
`regex_test`	Test regex patterns with match details and groups
`regex_replace`	Find and replace using regex
`hash_generate`	Generate hashes (MD5, SHA-1, SHA-256, SHA-384, SHA-512)
`hash_verify`	Verify a string matches a hash (auto-detects algorithm)
`color_contrast`	WCAG 2.1 contrast ratio checker with AA/AAA compliance
`cron_parse`	Parse cron expressions with human-readable descriptions
`cron_build`	Build cron expressions from options or presets

Quick Start

Install from npm

$npm install -g xsantcastx-mcp-server

Use with Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "xsantcastx-tools": {
      "command": "npx",
      "args": ["xsantcastx-mcp-server"]
    }
  }
}

Use with Claude Code

$claude mcp add xsantcastx-tools npx xsantcastx-mcp-server

Run locally

git clone https://github.com/xsantcastx/xsantcastx-mcp-server.git
cd xsantcastx-mcp-server
npm install
npm run build
npm start

Development

npm run dev    # Watch mode
npm run build  # Compile TypeScript
npm start      # Run server

Architecture

The server uses the official @modelcontextprotocol/sdk and communicates over stdio. Each tool is implemented as a pure function in src/tools/ — no external API calls, no network requests, no secrets. Everything runs locally.

src/
├── index.ts              # MCP server entry point + tool registrations
└── tools/
    ├── json-formatter.ts # JSON format/minify/validate
    ├── json-schema.ts    # JSON Schema generation
    ├── uuid-generator.ts # UUID v4 generation + validation
    ├── base64.ts         # Base64 encode/decode
    ├── jwt-decoder.ts    # JWT token inspection
    ├── regex-tester.ts   # Regex testing + replacement
    ├── hash-generator.ts # Cryptographic hashing
    ├── color-contrast.ts # WCAG contrast checking
    └── cron-parser.ts    # Cron expression parsing

Listing

Apify: apify.com/xsantcastx/xsantcastx-mcp (pending)
MCP Market: mcpmarket.com (pending)
Web: xsantcastx.com

License

MIT — xsantcastx

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