MCP Integration

Use Dev Tools ! with Claude

Dev Tools ! exposes a Model Context Protocol (MCP) server so Claude Desktop and other MCP clients can call our tools directly as functions.

Quick Setup — Claude Desktop

Add the following to your Claude Desktop config file:

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

Windows: %APPDATA%\Claude\claude_desktop_config.json

claude_desktop_config.json
{
  "mcpServers": {
    "devtoolzy": {
      "command": "npx",
      "args": ["-y", "@cosyslabs/devtoolzy-mcp"],
      "env": {}
    }
  }
}

After saving, restart Claude Desktop. You should see "devtoolzy" in the MCP servers list.

Available MCP Tools

base64_transform

Encode or decode Base64 strings

Params:{ input: string, mode: "encode" | "decode" }
format_data

Format and validate JSON, XML, YAML, or SQL

Params:{ input: string, format: "json" | "xml" | "yaml" | "sql" }
hash_text

Generate SHA-256, SHA-512, or MD5 hash of text

Params:{ input: string, algorithm: "sha256" | "sha512" | "md5" }
decode_jwt

Decode and inspect a JSON Web Token

Params:{ token: string }
generate_id

Generate UUID v4, v7, or ULID

Params:{ type: "uuid-v4" | "uuid-v7" | "ulid", count?: number }
regex_test

Test a regular expression against input text

Params:{ pattern: string, input: string, flags?: string }

MCP Discovery Endpoint

The MCP manifest is available at:

GET https://devtoolzy.com/.well-known/mcp.json

How it Works

  1. Claude detects a task that matches a Dev Tools ! function (e.g. "decode this JWT").
  2. Claude calls decode_jwt via MCP with your token as input.
  3. The MCP server runs the logic and returns the decoded JSON.
  4. Claude formats the result and presents it in the conversation.

All processing happens server-side in a Cloudflare Worker — no secrets are stored.