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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6channels
1API & key
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The full catalog
Search or filter by category. Every capability is its own endpoint with a published price.
⚙️ Developer UtilitiesFree
Extract words ending with a suffix
rhyme and filter list
P
POST /str/extract-words-ending$0.002⚙️ Developer UtilitiesFree
Jaro similarity calculator for two strings
B
POST /str/jaro-similarity$0.002⚙️ Developer UtilitiesFree
Unique lines preserving order
keep first, never sort, free
S
POST /str/unique-lines-ordered$0.002⚙️ Developer UtilitiesFree
Convert em units to pixels
CSS parent font size calculator
B
POST /str/em-to-px$0.002⚙️ Developer UtilitiesFree
Expand typographic ligatures
fix fi and fl text
B
POST /str/expand-ligatures$0.002⚙️ Developer UtilitiesFree
Find position of substring
first character index, free
A
POST /str/index-of$0.002⚙️ Developer UtilitiesFree
Words per line calculator
estimate words from column width
S
POST /str/words-per-line$0.002⚙️ Developer UtilitiesFree
Transpose CSV rows and columns
swap table orientation, free
S
POST /str/csv-transpose$0.002⚙️ Developer UtilitiesFree
Convert Lines to a Markdown Checklist
B
POST /str/markdown-checklist$0.002⚙️ Developer UtilitiesFree
Pad to monospace width
align wide characters in columns, free
A
POST /str/pad-visual-width$0.002⚙️ Developer UtilitiesFree
Multi-day drive days calculator
days from distance and daily limit
A
POST /travel/driving-days$0.002⚙️ Developer UtilitiesFree
Two-leg trip time calculator
total time and average speed
S
POST /travel/trip-time-two-legs$0.002⚙️ Developer UtilitiesFree
Annual fuel cost calculator
yearly gas from mileage, MPG, price
S
POST /travel/annual-fuel-cost$0.002⚙️ Developer UtilitiesFree
Car depreciation by year calculator
resale value over ownership
A
POST /travel/car-depreciation-by-year$0.002⚙️ Developer UtilitiesFree
EV cost per mile calculator
energy cost from Wh/mi and $/kWh
S
POST /travel/ev-cost-per-mile$0.002⚙️ Developer UtilitiesFree
Flight fuel reserve calculator
trip, alternate and reserve fuel
A
POST /travel/flight-fuel-reserve$0.002⚙️ Developer UtilitiesFree
Gear ratio speed spread calculator
road speed across all gears
A
POST /travel/gear-speed-spread$0.002⚙️ Developer UtilitiesFree
Aviation oxygen duration calculator
bottle time at altitude
A
POST /travel/oxygen-duration$0.002⚙️ Developer UtilitiesFree
Takeoff ground-roll calculator
DA, weight, wind and slope
S
POST /travel/takeoff-ground-roll$0.002⚙️ Developer UtilitiesFree
Tide time for depth calculator
when the tide hits a target height
S
POST /travel/tide-time-for-height$0.002⚙️ Developer UtilitiesFree
Wind pressure on sail calculator
force from knots and area
A
POST /travel/wind-force-on-sail$0.002⚙️ Developer UtilitiesFree
Time difference between cities calculator
UTC offsets, free
A
POST /travel/time-difference-cities$0.002⚙️ Developer UtilitiesFree
Trip nights and days calculator
hotel check-in to check-out stay length
S
POST /travel/trip-nights-days$0.002⚙️ Developer UtilitiesFree
Aerodynamic drag power calculator
watts from Cd, area and speed
A
POST /travel/drag-power$0.002⚙️ Developer UtilitiesFree
Hydroplaning speed calculator
wet-road onset from tire PSI
S
POST /travel/hydroplaning-speed$0.002⚙️ Developer UtilitiesFree
Cabin altitude from pressure calculator
ΔP and flight PA
A
POST /travel/cabin-altitude$0.002⚙️ Developer UtilitiesFree
Metric to inch tire size converter
flotation size and back
S
POST /travel/metric-to-inch-tire$0.002⚙️ Developer UtilitiesFree
Cross-currency rate calculator
implied FX via a shared base
A
POST /travel/cross-currency-rate$0.002⚙️ Developer UtilitiesFree
Wind-shear gradient calculator
vertical ΔV/Δz from two altitudes
S
POST /travel/wind-shear-gradient$0.002⚙️ Developer UtilitiesFree
Codominance cross ratio calculator
offspring phenotypes, free
A
POST /bio/codominance-cross-ratio$0.002⚙️ Developer UtilitiesFree
Itinerary time budget calculator
allocate daily hours and rest
S
POST /travel/itinerary-time-budget$0.002⚙️ Developer UtilitiesFree
Chi-square degrees of freedom genetics
df from phenotype classes
A
POST /bio/chi-square-dof-genetics$0.002⚙️ Developer UtilitiesFree
Coefficient of relationship calculator
Wright r from pedigree paths
S
POST /bio/coefficient-of-relationship$0.002⚙️ Developer UtilitiesFree
Mutation-selection equilibrium calculator
recessive q = √(μ/s)
S
POST /bio/mutation-equilibrium-frequency$0.002⚙️ Developer UtilitiesFree
mRNA to protein length calculator
amino acids, exclude stop
A
POST /bio/mrna-to-protein-length$0.002⚙️ Developer UtilitiesFree
Bacterial exponential growth calculator
final N = N0×2^(t/g)
S
POST /bio/exponential-growth-final$0.002⚙️ Developer UtilitiesFree
Ligation insert:vector ratio calculator
insert DNA mass
A
POST /bio/ligation-insert-vector-ratio$0.002⚙️ Developer UtilitiesFree
PCR product yield copies calculator
theoretical DNA after n cycles
S
POST /bio/pcr-amplicon-copies$0.002⚙️ Developer UtilitiesFree
Biomass yield coefficient calculator
Y_X/S = ΔX/ΔS g/g
S
POST /bio/biomass-yield-coefficient$0.002⚙️ Developer UtilitiesFree
Serial dilution volumes calculator
sample and diluent per tube
A
POST /bio/serial-dilution-volumes$0.002⚙️ Developer UtilitiesFree
Logistic growth rate calculator
instantaneous dN/dt from N, r and K
A
POST /bio/logistic-growth-rate-dndt$0.002⚙️ Developer UtilitiesFree
Logistic growth calculator
population N(t) from N0, r, K, t
S
POST /bio/population-logistic-growth$0.002⚙️ Developer UtilitiesFree
Species abundance proportions calculator
counts to p_i
S
POST /bio/species-abundance-proportions$0.002⚙️ Developer UtilitiesFree
Fertilizer blend ratio calculator
NPK source masses for a field mix
S
POST /bio/fertilizer-blend-ratio$0.002⚙️ Developer UtilitiesFree
Finite population growth rate calculator
λ from N or r
A
POST /bio/finite-growth-rate-lambda$0.002⚙️ Developer UtilitiesFree
Leaf area index calculator
LAI from one-sided leaf and ground area
A
POST /bio/leaf-area-index$0.002⚙️ Developer UtilitiesFree
Grain adjusted weight calculator
moisture shrink for fair trade
S
POST /bio/grain-adjusted-weight$0.002⚙️ Developer UtilitiesFree
Manure nutrient application calculator
N-P-K from rate and analysis
A
POST /bio/manure-nutrient-application$0.002⚙️ Developer UtilitiesFree
Dew point simple approximation calculator
Td = T−(100−RH)/5
S
POST /earth/dew-point-simple$0.002⚙️ Developer UtilitiesFree
Vapor pressure deficit calculator
VPD from T and RH
A
POST /earth/vapor-pressure-deficit$0.002⚙️ Developer UtilitiesFree
Altitude from pressure calculator
hypsometric ISA height
A
POST /earth/altitude-from-pressure-barometric$0.002⚙️ Developer UtilitiesFree
Summer simmer index calculator
SSI from temperature and humidity
S
POST /earth/summer-simmer-index$0.002⚙️ Developer UtilitiesFree
Beaufort number to wind speed range
knots and m/s, free
S
POST /earth/beaufort-to-wind-speed$0.002⚙️ Developer UtilitiesFree
Freezing rain ice accretion calculator
radial ice on a conductor
A
POST /earth/freezing-rain-accretion$0.002⚙️ Developer UtilitiesFree
UNEP aridity index calculator
P/PET dryland class
S
POST /earth/aridity-index-unep$0.002⚙️ Developer UtilitiesFree
Rubidium-strontium radiometric age calculator
isochron slope to age
A
POST /earth/radiometric-age-rb-sr$0.002⚙️ Developer UtilitiesFree
Natural gas carbon footprint calculator
kg CO2 from therms or m3
S
POST /earth/carbon-footprint-natural-gas$0.002⚙️ Developer UtilitiesFree
Manning open-channel velocity calculator
V from n, R, S
A
POST /earth/manning-velocity$0.002⚙️ Developer UtilitiesFree
Porosity from void ratio calculator
n = e/(1+e) and back
S
POST /earth/porosity-from-void-ratio$0.002⚙️ Developer UtilitiesFree
Air quality index from nitrogen dioxide
EPA NO2 AQI
A
POST /earth/aqi-no2$0.002No capabilities match your search.
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 — 7500+ 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.