Server Devutils
FreeMaintainedZero-auth MCP server with everyday developer utilities: base64, UUID, hash, JWT decode, cron, timestamps, JSON, regex.
About
Zero-auth MCP server with everyday developer utilities: base64, UUID, hash, JWT decode, cron, timestamps, JSON, regex.
README
npm version npm downloads CI License: MIT
An MCP server that gives your AI assistant 17 developer utilities — base64, UUID, JWT decode, cron, timestamps, JSON, regex. No API keys, no external services, just npx.
You: "Decode this JWT: eyJhbGci..."
AI: Header: { alg: "RS256" } Payload: { sub: "1234", exp: 1700000000 } Expired: yes
Works with Claude Desktop, Cursor, and VS Code Copilot. Zero auth required.

Tools
| Tool | What it does |
|---|---|
base64_encode |
Encode a string to Base64 |
base64_decode |
Decode a Base64 string |
uuid_generate |
Generate one or more UUIDs (v4) |
ulid_generate |
Generate a ULID |
hash |
Hash a string (md5, sha1, sha256, sha384, sha512) |
hash_all |
Hash with all algorithms at once |
jwt_decode |
Decode a JWT token (header, payload, expiry) |
cron_explain |
Explain a cron expression in plain English |
cron_validate |
Validate a cron expression |
cron_next |
Show next N run times for a cron expression |
timestamp_to_iso |
Convert Unix timestamp to ISO 8601 |
iso_to_timestamp |
Convert ISO 8601 to Unix timestamp |
timestamp_now |
Get current time in multiple formats |
json_format |
Pretty-print a JSON string |
json_minify |
Minify a JSON string |
json_validate |
Validate JSON and report its type |
regex_test |
Test a regex pattern against a string |
Quick Start
With Claude Desktop
Add to your claude_desktop_config.json:
{
"mcpServers": {
"devutils": {
"command": "npx",
"args": ["-y", "mcp-server-devutils"]
}
}
}
With Cursor
Add to your .cursor/mcp.json:
{
"mcpServers": {
"devutils": {
"command": "npx",
"args": ["-y", "mcp-server-devutils"]
}
}
}
With VS Code (Copilot)
Add to your .vscode/mcp.json:
{
"servers": {
"devutils": {
"command": "npx",
"args": ["-y", "mcp-server-devutils"]
}
}
}
Examples
Ask your AI assistant:
- "Decode this JWT token: eyJhbG..."
- "What does the cron expression
0 9 * * 1-5mean?" - "Generate 5 UUIDs"
- "Hash this string with SHA-256: hello world"
- "Convert Unix timestamp 1700000000 to a date"
- "Format this JSON: {"a":1,"b":2}"
- "Test the regex
\d{3}-\d{4}against '555-1234'"
Development
npm install
npm test
npm run build
Author
README built with README Builder
License
Install Server Devutils in Claude Desktop, Claude Code & Cursor
unyly install mcp-server-devutilsInstalls into Claude Desktop, Claude Code, Cursor & VS Code — handles npx, uvx and build-from-source repos for you.
First time? Get the CLI: curl -fsSL https://unyly.org/install | sh
Or configure manually
Run in your terminal:
claude mcp add mcp-server-devutils -- npx -y mcp-server-devutilsStep-by-step: how to install Server Devutils
FAQ
Is Server Devutils MCP free?
Yes, Server Devutils MCP is free — one-click install via Unyly at no cost.
Does Server Devutils need an API key?
No, Server Devutils runs without API keys or environment variables.
Is Server Devutils hosted or self-hosted?
A hosted option is available: Unyly runs the server in the cloud, no local setup required.
How do I install Server Devutils in Claude Desktop, Claude Code or Cursor?
Open Server Devutils on unyly.org, pick your client tab (Claude Desktop, Claude Code, Cursor) and press Install — the config is generated automatically, no JSON editing.
Changes
Versions and requested access over time.
- New version published
- New version published
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