| host | x402 payments | registry calls, 30 d | payers | sells |
|---|
| loonie-toll.onrender.com | 1,017 | 69 | concentrated | Federal disaster declarations for a US state or county: what is open now, incident types, |
| network-calc.x402tookit.com | 0 | 25 | — | Summarise IPv4 or IPv6 CIDR blocks into the minimal set (merging adjacent and overlapping |
| invest-math.x402tookit.com | 0 | 24 | — | Reward-to-risk ratio from entry, stop and target, the win rate needed to break even, and e |
| web3-tools.x402tookit.com | 0 | 24 | — | Exact unit conversion for crypto amounts: wei, gwei, ether, lamports, SOL, satoshis, BTC o |
| audio-calc.x402tookit.com | 0 | 12 | — | Frequencies, cents and ratios of the 12 notes in equal, 5-limit just, Pythagorean or quart |
| calendar-systems.x402tookit.com | 0 | 12 | — | March and September equinox and June and December solstice moments (UTC) for a year, with |
| cheap-utilities.x402tookit.com | 0 | 12 | — | Inspect a UUID: valid or not, version (1-8), variant, and the embedded timestamp for v1, v |
| cooking-calc.x402tookit.com | 0 | 12 | — | Convert fresh, active dry and instant yeast, split a sourdough starter into flour and wate |
| css-design-calc.x402tookit.com | 0 | 12 | — | Snap line-heights for font sizes to a baseline grid: baseline unit, lines per element, uni |
| dev-reference.x402tookit.com | 0 | 12 | — | Unicode character lookup by code point or character: name, block, category, UTF-8/UTF-16 b |
| geo-calc.x402tookit.com | 0 | 12 | — | Convert WGS84 latitude/longitude to UTM (zone, band, easting, northing) and MGRS, with Nor |
| physics-calc.x402tookit.com | 0 | 12 | — | Work (force x distance x cos angle), kinetic and potential energy, and power, with joule, |
| sports-calc.x402tookit.com | 0 | 12 | — | Rounds, byes and total games for single and double elimination, round-robin and Swiss even |
| word-tools.x402tookit.com | 0 | 12 | — | Wordle-style feedback for a guess against an answer: green, yellow and grey squares with c |
| chemistry-calc.x402tookit.com | 0 | 11 | — | pH and pOH for a strong or weak acid or base, a hydrogen-ion concentration, or a buffer (H |
| company-enrichment.x402tookit.com | 0 | 11 | — | Latest SEC filings for a company by ticker or CIK, with dates and links; filter by form su |
| derivatives.x402tookit.com | 0 | 11 | — | Squeeze risk for a perp: funding, open interest build-up, 24h move and basis combined into |
| electronics-calc.x402tookit.com | 0 | 11 | — | AWG copper wire: diameter, area and resistance per km, the nearest AWG for an area, and vo |
| math-geometry.x402tookit.com | 0 | 11 | — | Vector operations: dot and cross product, magnitudes, angle between vectors, projection, u |
| photo-calc.x402tookit.com | 0 | 11 | — | Time-lapse planner: give any two of interval, shooting time and clip length to get the res |
| agri-calc.x402tookit.com | 0 | 10 | — | Convert crop yield between bushels per acre and kg per hectare for corn (56 lb), wheat and |
| automotive-calc.x402tookit.com | 0 | 10 | — | Towing check in pounds: payload left after people, cargo and tongue weight, tow rating and |
| construction-calc.x402tookit.com | 0 | 10 | — | Tiles needed for a floor or wall from area or room size, tile size, grout gap and waste, p |
| country-codes-iso.x402tookit.com | 0 | 10 | — | US state, DC and territory lookup by USPS postal code, name or FIPS number; returns all th |
| crypto-math.x402tookit.com | 0 | 10 | — | RSA public key arithmetic: modulus bits, exponent validity, NIST strength; or a labelled t |
| data-calc.x402tookit.com | 0 | 10 | — | Requests per second times payload size to Mbps with peak factor, protocol overhead and lin |
| fitness-calc.x402tookit.com | 0 | 10 | — | Running pace per km and per mile, speed, and predicted times for other race distances usin |
| global-hazards.x402tookit.com | 0 | 10 | — | Estimate P and S wave arrival times and the S-P gap from an epicentral distance or two coo |
| linear-algebra.x402tookit.com | 0 | 10 | — | Vector dot, cross, norm, angle, projection, unit vector and distance for vectors of up to |
| math-stats.x402tookit.com | 0 | 10 | — | Welch two-sample or one-sample t-test: t statistic, degrees of freedom, p-value, confidenc |
| music-theory.x402tookit.com | 0 | 10 | — | Transpose a chord progression by semitones or from one key to another, with spelling that |
| portfolio-stats.x402tookit.com | 0 | 10 | — | Annualized volatility (sample standard deviation of returns) from a price or return series |
| probability-calc.x402tookit.com | 0 | 10 | — | Chance of a run: r successes in a row (or r identical outcomes) somewhere in n independent |
| site-climate.x402tookit.com | 0 | 10 | — | Koppen-Geiger climate class (such as Cfa or BSk) for a location, computed from its monthly |
| space-objects.x402tookit.com | 0 | 10 | — | Asteroid diameter from absolute magnitude H and albedo (or a dark-to-bright range), plus o |
| stats-tests.x402tookit.com | 0 | 10 | — | Sample size for a two-sample, one-sample or paired t-test from effect size, alpha and powe |
| text-ciphers.x402tookit.com | 0 | 10 | — | Vigenere cipher encode or decode with a key, or estimate the key length of a ciphertext by |
| text-similarity.x402tookit.com | 0 | 10 | — | Diff of two short texts into equal, deleted and inserted lines or words, with counts and a |
| aviation-calc.x402tookit.com | 0 | 9 | — | E6B wind triangle: wind correction angle, heading and groundspeed for a course, or track a |
| domain-dns.x402tookit.com | 0 | 9 | — | Nameserver health of a domain: count, provider diversity, whether each nameserver resolves |
| exoplanets-nasa.x402tookit.com | 0 | 9 | — | Transit depth (Rp/Rs squared) in percent and ppm from planet and star radius, plus duratio |
| file-formats.x402tookit.com | 0 | 9 | — | Parse a ZIP's first entry header: name, method, sizes, CRC, encryption, and zip-slip path |
| finance-calculators.x402tookit.com | 0 | 9 | — | Monthly saving needed to reach a goal by a date, given what you already have and an expect |
| home-energy-calc.x402tookit.com | 0 | 9 | — | Water heater recovery rate (gallons an hour), tank heat-up time and energy cost from input |
| id-validators.x402tookit.com | 0 | 9 | — | Validate a 17-character vehicle VIN check digit and decode region, manufacturer code and m |
| json-data-tools.x402tookit.com | 0 | 9 | — | Validate a UUID and read its version, variant and, for v1 and v7, the embedded timestamp. |
| license-intel.x402tookit.com | 0 | 9 | — | List current OSI-approved SPDX licenses, optionally only FSF-libre ones or those starting |
| market-calendar.x402tookit.com | 0 | 9 | — | Count US trading days between two dates (inclusive), with weekends and NYSE holidays remov |
| music-production-calc.x402tookit.com | 0 | 9 | — | Note values 1/1 to 1/32 (straight, dotted, triplet) at a BPM as ms, LFO Hz, samples and MI |
| number-words.x402tookit.com | 0 | 9 | — | How to say a year in English: the usual pair reading (nineteen eighty-four, twenty oh-five |
| party-event-calc.x402tookit.com | 0 | 9 | — | Tables and chairs for a guest count from seats per table, with spare chairs, empty seats a |
| pricing-math.x402tookit.com | 0 | 9 | — | Split a tax-inclusive price into net and tax, or add tax to a net price, for a sales tax o |
| publishing-calc.x402tookit.com | 0 | 9 | — | Standard US trade book trim sizes in inches and mm, or look up one size like 6x9 and its c |
| radio-calc.x402tookit.com | 0 | 9 | — | SWR, reflection coefficient, return loss, mismatch loss and reflected power from SWR, a re |
| timezone-time.x402tookit.com | 0 | 9 | — | ISO 8601 week number and week year, day of the year, quarter, weekday and leap-year status |
| units-convert.x402tookit.com | 0 | 9 | — | Convert a value between units of length, mass, volume, area, speed, pressure, energy, powe |
| vehicle-vin.x402tookit.com | 0 | 9 | — | Look up the manufacturer, make and vehicle type behind a 3-character VIN prefix (WMI), wit |
| weather-global.x402tookit.com | 0 | 9 | — | Wind forecast for the next 6 to 72 hours: peak and average speed in km/h, mph, knots, dire |
| work-time-calc.x402tookit.com | 0 | 9 | — | Working hours between two timestamps under a weekly schedule with breaks and a holiday lis |
| airports-reference.x402tookit.com | 0 | 8 | — | Busiest large airports ranked by annual passengers (latest Wikidata figure), optionally by |
| aviation-weather.x402tookit.com | 0 | 8 | — | Airport forecast (TAF) summarized: worst flight category in the next 6-24 hours, when it s |
| bike-calc.x402tookit.com | 0 | 8 | — | Rolling circumference and diameter for common tyre sizes, or an estimate from rim bead dia |
| biodiversity.x402tookit.com | 0 | 8 | — | Search species by common or scientific name; returns accepted species with taxonomy and co |
| bitcoin-network.x402tookit.com | 0 | 8 | — | Status of a Bitcoin transaction: unconfirmed or confirmed, confirmation depth, fee and fee |
| chess-notation.x402tookit.com | 0 | 8 | — | Classify a chess time control (bullet, blitz, rapid, classical) from base minutes and incr |
| color-design.x402tookit.com | 0 | 8 | — | Generate a color palette from a base hex color: complementary, analogous, triadic, tetradi |
| country-facts.x402tookit.com | 0 | 8 | — | IANA time zones for a country with UTC offsets and daylight-saving flags at a given moment |
| craft-calc.x402tookit.com | 0 | 8 | — | Stitches and rows needed to cover a width and height at your stitch and row gauge, with to |
| fx-ecb.x402tookit.com | 0 | 8 | — | Latest ECB reference exchange rate for a currency pair, with the inverse and the fixing da |
| garden-calc.x402tookit.com | 0 | 8 | — | Soil or mulch for a rectangular or round bed: cubic feet, yards, litres, bags, settling al |
| geo-us.x402tookit.com | 0 | 8 | — | US ZIP code to place name, state and centroid; optionally verify it belongs to a state you |
| grades-calc.x402tookit.com | 0 | 8 | — | Overall class grade from categories or assignments with scores, maximums and weights, norm |
| jewelry-calc.x402tookit.com | 0 | 8 | — | Convert a ring size between US, EU (ISO circumference), UK letter, inside diameter and cir |
| land-survey.x402tookit.com | 0 | 8 | — | Sunrise, sunset, civil twilight and day length for a latitude/longitude and date, in UTC a |
| life-dates.x402tookit.com | 0 | 8 | — | Western zodiac sign and Chinese zodiac animal with element for a birth date, flagging cusp |
| llm-cost-calc.x402tookit.com | 0 | 8 | — | Rough LLM token estimate of text from characters and words, as a low-high range by content |
| machining-calc.x402tookit.com | 0 | 8 | — | ISO metric thread dimensions: pitch diameter, minor diameters, thread height and tensile s |
| map-tiles.x402tookit.com | 0 | 8 | — | Zoom-level ladder 0 to 24: tiles per side, metres per pixel, map scale and typical use, at |
| medical-codes.x402tookit.com | 0 | 8 | — | Validate a US National Provider Identifier (NPI) format and check digit offline; it does n |
| package-health.x402tookit.com | 0 | 8 | — | Was a PyPI release yanked? Exact version check with the maintainer's reason, upload date a |
| package-registries.x402tookit.com | 0 | 8 | — | Health of a PHP Composer package on Packagist: latest stable release age, downloads, licen |
| paper-print-calc.x402tookit.com | 0 | 8 | — | Letter, Legal, Tabloid, ANSI A-E and Architectural A-E paper sizes in inches, mm and point |
| pet-calc.x402tookit.com | 0 | 8 | — | Nitrate left after partial water changes, changes needed to reach a target, and the litres |
| plumbing-calc.x402tookit.com | 0 | 8 | — | How much a pipe run lengthens or shortens with temperature for copper, steel, PVC, CPVC, P |
| research-papers.x402tookit.com | 0 | 8 | — | Recent research papers on a topic from OpenAlex: title, year, citations, DOI and open-acce |
| security-math.x402tookit.com | 0 | 8 | — | Shamir t-of-n secret sharing maths: qualifying subsets, loss tolerance, recovery and compr |
| shipping-calc.x402tookit.com | 0 | 8 | — | Compare package sizes by price per 100 g, 100 ml or per item across mixed units, ranked wi |
| space-weather.x402tookit.com | 0 | 8 | — | Active sunspot regions on the Sun now: count, complex magnetic types that can flare, and r |
| url-text-tools.x402tookit.com | 0 | 8 | — | Resolve a relative link against a base URL per RFC 3986 section 5, handling ../, ./, //hos |
| video-calc.x402tookit.com | 0 | 8 | — | File size from video bitrate and duration (MB, GB, GiB), bits per pixel, or the bitrate th |
| vuln-intel.x402tookit.com | 0 | 8 | — | Known vulnerabilities for an exact package version (npm, PyPI, Go, Maven...): fixed versio |
| wikidata-facts.x402tookit.com | 0 | 8 | — | Same-as links for a Wikidata entity: VIAF, ISNI, GND, Library of Congress, GeoNames, Wikip |
| wikipedia-attention.x402tookit.com | 0 | 8 | — | Search Wikipedia article titles by words: exact titles, one-line descriptions and thumbnai |
| x402-meta.x402tookit.com | 0 | 8 | — | Is an x402 service's traffic organic? Checks a host's reported volume for shared payouts, |
| focus-sleep-calc.x402tookit.com | 0 | 7 | — | Split a time window into equal blocks with breaks between them, with 12-hour clock times a |
| food-barcode.x402tookit.com | 0 | 7 | — | Scale label nutrition from per 100 g to a serving, with FDA percent daily values and a che |
| hvac-calc.x402tookit.com | 0 | 7 | — | Sensible heat from airflow and temperature difference (1.08 x CFM x dT), or the CFM needed |
| marine-conditions.x402tookit.com | 0 | 7 | — | Latest observed water level at a NOAA station against its tide prediction: the difference |
| text-metrics.x402tookit.com | 0 | 7 | — | Similarity of two texts by edit distance, word overlap (Jaccard) and cosine, with a same, |
| world-bank.x402tookit.com | 0 | 7 | — | An economic or social indicator for a country over 3-40 years: values, change, average and |
| treasury-macro.x402tookit.com | 0 | 6 | — | Spread between two Treasury maturities (for example 2Y and 10Y) now and over recent days, |