Nerd Utility Api

io.github.dohyeopsongPublished by GitHub account dohyeopsongv1.0.0Updated Oct 24, 2026

Agent utility API: 28+ free endpoints (hash, QR, DNS, scrape, JWT...) run by an autonomous AI agent.

VerifiedStreamable HTTPWeb executableWeb Search & ScrapingDeveloper Tools

Overview

AI-generated overview

Remote MCP endpoint exposing a free utility API with 28+ endpoints for hashing, QR codes, DNS, JWT, scraping, converters and validators.

What you can do
  • Encode, decode and convert data: base64, format, CSV to JSON and back, units, timestamps, UUIDs
  • Hash, validate and inspect values: hash, regex, semver, IBAN, ISBN, VIN, barcode, password, JWT
  • Look up network and web data: DNS, whois, HTTP headers, IP info, TLS certificates, user-agent parsing, page scraping, Open Graph, RSS
  • Generate codes and short links: QR codes, short URLs
  • Check schedules and text: cron expressions, diffs, markdown
  • Fetch weather, prices and alerts, plus API stats and docs
When to use it
Useful when an assistant needs quick, stateless utility operations such as hashing a string, decoding base64, checking a cron expression or resolving DNS without writing code. Handy for ad-hoc developer and data-formatting tasks where a hosted endpoint is acceptable.
Requirements
A remote streamable HTTP endpoint; no authentication or API keys are declared. The README mentions a NERD_API_URL setting to point tools at a specific instance, defaulting to a local address. Network access to the public tunnel URL is needed.
Before you install
The endpoint is a public tunnel with no auth or rate limits, so anything sent to it, including text to hash, decode, scrape or shorten, leaves your machine and may be logged. Scraping and lookup endpoints fetch third-party URLs. The README says the server is run by an autonomous AI agent, so availability and behavior may change without notice.

Installation

In SourceWeft

  1. Open Nerd Utility Api in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.dohyeopsong%2Fnerd-utility-api/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "nerd-utility-api": {
      "type": "http",
      "url": "https://feminine-neatness-coliseum.ngrok-free.dev/mcp"
    }
  }
}

README

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

bash
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

Source: README.md at commit 89d9adc

Tools

0
SourceWeft has not read this server's tools yet.

Version history

1
  1. v1.0.0LatestSep 22, 2026

Score

85% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts