ForHosting KIT

Everything you need.
One Kit.

Hundreds of ready-made tasks — PDF, images, audio, OCR, text AI, scraping, data and more — behind a single REST API. Send a job, get a finished result by webhook. No servers, no per-model tokens, a price you can read.

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Get your API key Browse the catalog
7825ready-made tools
6channels
1API & key
$0.002per call, from

New capabilities

Fresh in the kit — just landed.

New⚙️ Developer UtilitiesNull space calculatorkernel basis of a matrix from its rowsSsamurai$0.002Open math.null_space →New⚙️ Developer UtilitiesLogical NOR calculatortrue only when both inputs are falsePPavilion$0.002Open math.nor →New⚙️ Developer UtilitiesMultiply complex numbers(a+bi)(c+di) product, freeAabuela$0.002Open math.multiply_complex_numbers →New⚙️ Developer UtilitiesMöbius strip calculatorsurface area and edge lengthSsamurai$0.002Open math.mobius_strip →New⚙️ Developer UtilitiesLong multiplication calculatordigit-by-digit product, freeAabuela$0.002Open math.long_multiplication →New⚙️ Developer UtilitiesMean calculatorarithmetic mean of a list of numbersPPavilion$0.002Open math.mean →New⚙️ Developer UtilitiesLog2 calculatorbase-2 logarithm of a positive numberSsamurai$0.002Open math.log_2 →New⚙️ Developer UtilitiesLine of intersection of two planesparametric formAabuela$0.002Open math.line_of_intersection_of_two_planes →New⚙️ Developer UtilitiesLinear-feedback shift registerLFSR bit sequence from tapsSsamurai$0.002Open math.linear_feedback_shift_register →New⚙️ Developer UtilitiesLinear combination calculatorweighted sum of vectorsPPavilion$0.002Open math.linear_combination →New⚙️ Developer UtilitiesLength of a rectangle calculatorfrom area and width, freeAabuela$0.002Open math.length_of_a_rectangle →New⚙️ Developer UtilitiesLeast to greatest fractionssort a list from smallest to largestPPavilion$0.002Open math.least_to_greatest_fractions →

Popular capabilities

Loved right now, by real traffic.

The full catalog

Search or filter by category. Every capability is its own endpoint with a published price.

⚙️ Developer UtilitiesFree
Contribution margin calculator
unit CM and CM ratio from price
Ssamurai
POST /finance/contribution-margin$0.002
⚙️ Developer UtilitiesFree
Net present value calculator
project NPV from outlay and cash flows
PPavilion
POST /finance/npv$0.002
⚙️ Developer UtilitiesFree
Credit utilization ratio calculator
revolving balances vs limits
PPavilion
POST /finance/credit-utilization$0.002
⚙️ Developer UtilitiesFree
Return on assets calculator
ROA from net income and total assets
Aabuela
POST /finance/return-on-assets$0.002
⚙️ Developer UtilitiesFree
Working capital calculator
net working capital and current ratio
Ssamurai
POST /finance/working-capital$0.002
⚙️ Developer UtilitiesFree
Impermanent loss calculator
AMM LP IL from price ratio change
PPavilion
POST /finance/crypto-impermanent-loss$0.002
⚙️ Developer UtilitiesFree
Housing cost ratio calculator
share of income spent on housing
Ssamurai
POST /finance/housing-cost-ratio$0.002
⚙️ Developer UtilitiesFree
Cheaper package unit price calculator
which pack is cheaper
Aabuela
POST /finance/unit-price-compare$0.002
⚙️ Developer UtilitiesFree
Diffraction-limited aperture calculator
DLA from pixel pitch
Ssamurai
POST /hobby/photo-diffraction-limited-aperture$0.002
⚙️ Developer UtilitiesFree
Graduated ND filter transition calculator
sky vs foreground
PPavilion
POST /hobby/photo-graduated-nd$0.002
⚙️ Developer UtilitiesFree
Vertical angle of view calculator
lens FOV height
Aabuela
POST /hobby/photo-vertical-angle-of-view$0.002
⚙️ Developer UtilitiesFree
Guide number from aperture and distance
GN = N × d at ISO
Aabuela
POST /hobby/photo-flash-guide-from-distance$0.002
⚙️ Developer UtilitiesFree
ISO after stops change calculator
new ISO from ±stops
Ssamurai
POST /hobby/photo-iso-after-stops$0.002
⚙️ Developer UtilitiesFree
Number of bars in a song calculator
complete measures, free
Aabuela
POST /hobby/music-bar-count$0.002
⚙️ Developer UtilitiesFree
Dotted note delay time calculator
ms for rhythmic echoes
PPavilion
POST /hobby/music-dotted-delay$0.002
⚙️ Developer UtilitiesFree
Interval in cents from frequency ratio calculator
free
Ssamurai
POST /hobby/music-ratio-to-cents$0.002
⚙️ Developer UtilitiesFree
Knitting rows for length calculator
rows from row gauge, free
PPavilion
POST /hobby/craft-knit-rows-for-length$0.002
⚙️ Developer UtilitiesFree
Knitting yarn yardage estimator
stitch count, gauge, consumption
Ssamurai
POST /hobby/craft-knit-yarn-yardage$0.002
⚙️ Developer UtilitiesFree
D&D armor class calculator
5e AC from armor, Dex, shield
PPavilion
POST /hobby/dnd-armor-class$0.002
⚙️ Developer UtilitiesFree
D&D encounter XP budget calculator
Easy to Deadly by party
Ssamurai
POST /hobby/dnd-encounter-xp-budget$0.002
⚙️ Developer UtilitiesFree
D&D passive perception calculator
5e Wisdom, proficiency, free
Aabuela
POST /hobby/dnd-passive-perception$0.002
⚙️ Developer UtilitiesFree
Catan number pip dots calculator
2d6 payout odds, free
Aabuela
POST /hobby/game-catan-pips$0.002
⚙️ Developer UtilitiesFree
Audio file size from sample rate
uncompressed WAV bytes, free
Aabuela
POST /hobby/music-audio-size-sample-rate$0.002
⚙️ Developer UtilitiesFree
Note from interval and root calculator
apply a named interval to a pitch
PPavilion
POST /hobby/music-note-from-interval$0.002
⚙️ Developer UtilitiesFree
Vibrating string fundamental frequency
f = (1/2L)√(T/μ)
Ssamurai
POST /hobby/music-string-frequency$0.002
⚙️ Developer UtilitiesFree
Beads per length calculator
how many beads fit a strand
Aabuela
POST /hobby/craft-beads-per-length$0.002
⚙️ Developer UtilitiesFree
Candle Wax Amount Calculator
Weight by Jar Volume
Kkatherine
POST /hobby/craft-candle-wax$0.002
⚙️ Developer UtilitiesFree
Macrame cord length calculator
cut length per working strand
PPavilion
POST /hobby/craft-macrame-cord$0.002
⚙️ Developer UtilitiesFree
Resin volume for mold calculator
volume and mixed weight
Bbarbara
POST /hobby/craft-resin-volume-mold$0.002
⚙️ Developer UtilitiesFree
Darts Three-Dart Average Calculator
Points and Darts
Kkatherine
POST /hobby/sport-darts-three-dart-average$0.002
⚙️ Developer UtilitiesFree
Marathon Pace from Goal Time Calculator
Per Kilometer or Mile
Bbarbara
POST /hobby/sport-run-marathon-pace$0.002
⚙️ Developer UtilitiesFree
Tennis tiebreak score calculator
next serve and winner
Ssamurai
POST /hobby/sport-tennis-tiebreak$0.002
⚙️ Developer UtilitiesFree
Maximum Operating Depth Calculator for Nitrox and Trimix
Bbarbara
POST /hobby/sport-dive-mod$0.002
⚙️ Developer UtilitiesFree
Hiking time with elevation calculator
pace, climb, descent
Ssamurai
POST /hobby/sport-hike-time-elevation$0.002
⚙️ Developer UtilitiesFree
Rowing 500m Split Calculator for Distance and Time
Kkatherine
POST /hobby/sport-rowing-split$0.002
⚙️ Developer UtilitiesFree
Even-pace split times calculator
cumulative race splits at a target pace
Aabuela
POST /hobby/sport-run-even-splits$0.002
⚙️ Developer UtilitiesFree
Count numbers in text
find integer and decimal groups
Bbarbara
POST /str/count-numbers$0.002
⚙️ Developer UtilitiesFree
Climbing rope impact force calculator
peak force from fall factor
PPavilion
POST /hobby/sport-climb-impact-force$0.002
⚙️ Developer UtilitiesFree
Average syllables per word calculator
Bbarbara
POST /str/average-syllables-per-word$0.002
⚙️ Developer UtilitiesFree
Count unique words
vocabulary size after case-fold, free
Aabuela
POST /str/count-unique-words$0.002
⚙️ Developer UtilitiesFree
Find longest word
letter length, ties, typography fit, free
Ssamurai
POST /str/longest-word$0.002
⚙️ Developer UtilitiesFree
Convert to COBOL-CASE
uppercase words joined with hyphens
Bbarbara
POST /str/cobol-case$0.002
⚙️ Developer UtilitiesFree
Coleman-Liau index calculator
US grade from letters, words, sentences
Aabuela
POST /str/coleman-liau$0.002
⚙️ Developer UtilitiesFree
Get first word from text
trim spaces and punctuation, free
Ssamurai
POST /str/first-word$0.002
⚙️ Developer UtilitiesFree
Normalize whitespace
collapse spaces and lines
Aabuela
POST /str/normalize-whitespace$0.002
⚙️ Developer UtilitiesFree
Count Stop Words in Text for SEO Analysis
Bbarbara
POST /str/stopword-count$0.002
⚙️ Developer UtilitiesFree
Normalize Hyphens and Dashes
Fix Unicode Dash Characters
Bbarbara
POST /str/normalize-dashes$0.002
⚙️ Developer UtilitiesFree
Remove non-ASCII characters
strip accents, emoji, symbols
Ssamurai
POST /str/remove-non-ascii$0.002
⚙️ Developer UtilitiesFree
Remove soft hyphens
strip invisible SHY from PDF text, free
PPavilion
POST /str/remove-soft-hyphens$0.002
⚙️ Developer UtilitiesFree
Sort lines numerically
order text by number online
Bbarbara
POST /str/sort-lines-numeric$0.002
⚙️ Developer UtilitiesFree
Trim blank lines top and bottom
keep middle
Aabuela
POST /str/trim-blank-edges$0.002
⚙️ Developer UtilitiesFree
Number lines with a custom start and step
Bbarbara
POST /str/enumerate-lines-custom$0.002
⚙️ Developer UtilitiesFree
Join lines with a separator
lists to inline text, free
Ssamurai
POST /str/join-lines$0.002
⚙️ Developer UtilitiesFree
Pad a string on the right to a fixed length
Bbarbara
POST /str/pad-right$0.002
⚙️ Developer UtilitiesFree
Sort words by length
shortest to longest, free in browser
Ssamurai
POST /str/sort-words-length$0.002
⚙️ Developer UtilitiesFree
Truncate in the middle
keep start and end of paths, free
Aabuela
POST /str/truncate-middle$0.002
⚙️ Developer UtilitiesFree
Wrap each line with text
add a prefix and suffix to every line, free
PPavilion
POST /str/wrap-each-line$0.002
⚙️ Developer UtilitiesFree
Extract IP addresses from text
online IPv4 extractor
Bbarbara
POST /str/extract-ip-addresses$0.002
⚙️ Developer UtilitiesFree
Extract numbers from text
integers and decimals listed, free
Aabuela
POST /str/extract-numbers$0.002
⚙️ Developer UtilitiesFree
Extract words ending with a suffix
rhyme and filter list
PPavilion
POST /str/extract-words-ending$0.002

How it works

1

Get your key

Create an account with your email and add balance when you need it. No subscription, no sales call.

2

Call the endpoint

One authenticated POST. The API returns a task_id immediately — copy-paste snippets in five languages on every page.

3

Collect the result

Receive a signed webhook the moment it's ready, or fetch a signed link. A failed task is never charged.

Pay only for what you use

No subscription. Free tools run in your browser; paid tasks draw from your balance, which never expires.

Free tools
$0.00

On-device utilities — hash, QR, JSON, Text→PDF and more — run in your browser. No account, no limits.

Pay-as-you-go
Per task
$0.002+

The full API — 7800+ capabilities — billed only for what you run, from $0.002 per call. No monthly fee.

Balance
$10.00+

Top up your balance and spend it across web, API and the app. It never expires.

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