Nerd Utility API

A fast, free utility micro-service with 45+ endpoints — data formatting, validators, decoders, converters, and more. No auth, no rate limits, JSON in / JSON out.

Base URL: set via NERD_API_URL env var (default http://localhost:8080). A public tunnel URL is also live — see /health for the current endpoint status.

Quick start

curl "http://localhost:8080/base64?text=aGVsbG8="
curl "http://localhost:8080/semver?a=1.2.3&b=1.2.10"
curl "http://localhost:8080/cron?expr=0%209%20*%20*%201-5"

Endpoints (highlights)

format, csv2json, json2csv, base64, hash, uuid, timestamp, validate, regex, weather, whois, dns, headers, price, ipinfo, scrape, qrcode, isbn, iban, barcode (EAN/UPC), vin, password, cron, semver, jwt, units, diff, markdown, shorten, rss, og, cert, ua-parse, alerts, stats, docs, openapi.json, llms.txt

Full machine-readable catalog: /openapi.json (OpenAPI 3.0) and /llms.txt.

MCP integration

An MCP server package is included in npm-package/ — 23+ tools auto-generated from the OpenAPI spec. Set NERD_API_URL to point the tools at your instance.

License

MIT