General Utilities x402 offerings

Convert Arabic numbers to Roman numerals (1-3999) and Roman to Arabic, validating the canonical form (MCMXCIV) and suggesting the correct one.

Validate EAN-8, EAN-13, UPC-A, GTIN-14, ISBN-10 and ISBN-13: check digit (and the expected one if wrong), code type, GS1 prefix and registering country, plus ISBN-10/13 conversion.

Business days in 150+ countries and their regions: count between two dates, or the date after adding N business days, skipping weekends and official holidays, listing the holidays in the range.

Compare two texts by lines or words: similarity %, added and removed items, list of changes with positions, and a unified diff. For contract versions, prompts, configs or scraped pages.

Translate text to any language with local AI (Qwen3-4B), preserving formatting, names and numbers; detects the source language.

Date facts (weekday, ISO week, quarter, day of year, leap year), exact difference between two dates in years, months, days, weeks and Mon-Fri working days, and adding or subtracting days, months or y…

Validate a 5-field cron expression (ranges, steps, names, @daily aliases), explain it in plain English and list its next run times in any time zone, DST-aware.

Convert a date and time (or now) from one IANA time zone to up to 25 others: local time, UTC offset, abbreviation, daylight saving flag, weekday, hour difference, UTC and Unix timestamp.

Convert integers of any size (signed) between bases 2 to 36: binary, octal, decimal, hex, base32, base36, with bit and byte length and two's complement. Accepts 0x/0b/0o prefixes.

Spanish business-day calculator: count business days between dates or add N business days, using Spain's national public holidays.

Turn an iCal/ICS calendar URL (Google Calendar, Outlook, holidays, events...) into JSON: upcoming events with title, start and end, all-day flag, location, description and link over the next N days; …

Convert units of length, mass, volume, area, speed, temperature, data (KB vs KiB), energy, pressure, time and power, metric and imperial, with exact factors.

Extract keywords and keyphrases from a text without AI (RAKE algorithm scoring frequency and degree), in Spanish or English, plus most frequent words. For tagging, indexing and SEO.

Decode a vehicle identification number (17-character VIN): make, model, year, trim, body, engine, fuel and electrification, transmission, drive, plant city and country, and safety equipment. Official…

Spanish business-day calculator: count business days between dates or add N business days, using Spain's national public holidays.

Convert a color between HEX, RGB, HSL, HSV and CMYK and, given a background, compute the WCAG 2.x contrast ratio with AA/AAA pass flags; without background, suggests black or white text.

Randomness for agents: flip coins, roll dice, draw numbers in a range, pick from a list or shuffle it. Cryptographically secure by default; with verificable=true it is derived from the latest finaliz…

Get quote tweets of a specific tweet. Returns tweets that quote the target tweet.

Nansen blockchain analytics — 44 endpoints (smart money, profiler, TGM, perps, indicators)

Get trending topics by WOEID (Where On Earth ID). Returns list of trending topics with tweet volume.

Get a Twitter/X user profile by username. Returns name, bio, follower/following counts, and verification status.

Real-time token screening across chains with Smart Money filters

Nansen blockchain analytics — 44 endpoints (smart money, profiler, TGM, perps, indicators)

Get a single tweet by its numeric ID. Returns full text, author profile, and engagement metrics.