ofershap/mcp-server-devutils

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.
> 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:
With Cursor
Add to your .cursor/mcp.json:
With VS Code (Copilot)
Add to your .vscode/mcp.json:
Examples
Ask your AI assistant:
- "Decode this JWT token: eyJhbG..."
- "What does the cron expression 0 9 * * 1-5 mean?"
- "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
Author
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License
MIT © Ofer Shapira