nerd-utility-api
Agent-friendly utility API — 28+ free endpoints (hash, base64, QR, DNS, scrape, JWT, cron, units...) built and operated by an autonomous AI agent.
What it can do
- Health: Health check
- Pricing: Endpoint pricing list
- Docs: HTML documentation
What data it sees
Do you need an account
No: the server works without sign-in
Agent-friendly utility API — 28+ free endpoints (hash, base64, QR, DNS, scrape, JWT, cron, units...) built and operated by an autonomous AI agent. Usable over MCP or plain HTTP.
How to connect
How to connect nerd-utility-api to Claude
The server address to paste into Claude settings:
https://nerd-utility-api--vlsms119.run.tools
- Open Claude (claude.ai or the desktop app).
- Go to Settings → Connectors.
- Click Add custom connector.
- Paste the server address copied below into Remote MCP server URL and click Add.
- In a chat, click + → Connectors and switch the new connector on.
Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.
Authorization
After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.
How to connect nerd-utility-api to ChatGPT
The server address to paste into ChatGPT settings:
https://nerd-utility-api--vlsms119.run.tools
- Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
- Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
- Open Settings → Connectors and click Create.
- Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
- Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
- In a new chat open + → Apps/Connectors and enable the connector.
OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.
Authorization
On first use ChatGPT opens the service's sign-in window. Sign in and approve access.
How to connect nerd-utility-api to Cursor
The server address to paste into Cursor settings:
https://nerd-utility-api--vlsms119.run.tools
Fastest: click Open in Cursor below and confirm the prompt.
Manually:
- In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
- Paste the JSON copied below into
~/.cursor/mcp.json(per project:.cursor/mcp.jsonin the repo root). - Save the file. The server appears in the MCP list; authorize it there if asked.
Authorization
If the service needs sign-in, an authorize button appears next to the server in the MCP list.
Server tool list (56)
Raw names from tools/list. Only developers need these.
| health | Health check |
| pricing | Endpoint pricing list |
| docs | HTML documentation |
| stats | Usage analytics |
| format | Pretty-print JSON |
| csv2json | Convert CSV to JSON |
| json2csv | Convert JSON to CSV |
| base64 | Base64 encode/decode |
| hash | Hash text (md5/sha1/sha256) |
| uuid | Generate UUID |
| timestamp | Unix timestamp conversion |
| text-stats | Word/char counts and text analysis |
| qrcode | Generate QR code (svg/png/ascii) |
| dns | DNS lookup |
| headers | Fetch URL response headers |
| price | Crypto price feed |
| price_history | Historical crypto prices |
| ipinfo | Client IP and headers |
| scrape | Scrape a URL and extract text |
| alerts | List price alerts; Create price alert rule; Delete alert rule |
| random | Random integer between min and max |
| password | Generate a secure random password (length 8-128, exclude sets) |
| lorem | Lorem ipsum placeholder text (words=30, start=false) |
| slugify | Convert text to a URL-safe slug |
| case | Convert text case: upper, lower, title, camel, snake |
| url-encode | URL encode/decode text |
| barcode | Validate EAN-8/EAN-13/UPC-A barcodes with checksum and GS1 country lookup |
| cert | TLS certificate lookup: issuer, validity, SANs, days-until-expiry |
| cron | Explain a cron expression and list next 3 run times |
| csv | Convert CSV to JSON or JSON to CSV |
| dashboard | Live HTML usage dashboard |
| diff | Unified line diff between two texts |
| faker | Generate fake test data (names, emails, etc.) |
| hook | Webhook tester |
| iban | Validate IBAN (country lengths + mod-97 checksum) |
| isbn | Validate ISBN-10/13 checksums, convert between formats |
| jwt | JWT inspector: decode header/payload, check exp/nbf/iat |
| jwt-decode | Decode JWT header/payload (legacy alias) |
| markdown | Convert fetched HTML to clean Markdown |
| og | Extract OpenGraph/Twitter meta tags for link previews |
| otp | Generate a TOTP/OTP code |
| paste | Create a paste (POST body), fetch at /p/:id |
| qr | QR code generator (alias of qrcode) |
| regex | Test a regex against text, get match info |
| rss | Fetch an RSS/Atom feed and return clean JSON items |
| semver | Compare or sort semver versions (semver.org spec) |
| shorten | URL shortener: returns short code, redirects at /s/:code |
| slug | Slugify text into URL-safe form |
| ts | Timestamp converter (unix <-> ISO) |
| ua-parse | Parse a User-Agent string: browser, OS, device, bot |
| units | Convert between units (length, mass, temperature, data, volume) |
| validate | Validate email/url/ipv4/ipv6/json/uuid/luhn |
| vin | Decode/validate a 17-char VIN: check digit, WMI, model year, region |
| weather | Weather via Open-Meteo: current + forecast by city or lat/lon |
| whois | RDAP domain lookup with registrar and dates |
| md | Convert Markdown to HTML |