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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The full catalog
Search or filter by category. Every capability is its own endpoint with a published price.
⚙️ Developer UtilitiesFree
Area by double meridian distance
enclosed traverse area
S
POST /eng/area-dmd$0.002⚙️ Developer UtilitiesFree
Horizontal curve long chord calculator
LC = 2R sin(Δ/2)
A
POST /eng/curve-long-chord$0.002⚙️ Developer UtilitiesFree
Power factor correction kVAR calculator
Qc from P, PF
A
POST /eng/pf-correction$0.002⚙️ Developer UtilitiesFree
Gantt task end date calculator
calendar or working days
S
POST /biz/gantt-task-end$0.002⚙️ Developer UtilitiesFree
Work hours overlap percentage calculator
two-team UTC windows
A
POST /biz/work-hours-overlap-percent$0.002⚙️ Developer UtilitiesFree
Motor efficiency calculator
η = P_out/P_in × 100%
S
POST /eng/motor-efficiency$0.002⚙️ Developer UtilitiesFree
Effort variance calculator
planned vs actual hours
S
POST /biz/effort-variance$0.002⚙️ Developer UtilitiesFree
No-meeting day time reclaimed calculator
hours a team gets back
A
POST /biz/no-meeting-day-savings$0.002⚙️ Developer UtilitiesFree
Time to complete task list calculator
total and finish clock
A
POST /biz/tasklist-total-time$0.002⚙️ Developer UtilitiesFree
Work-to-break ratio calculator
split a session into work and rest
S
POST /biz/work-break-ratio$0.002⚙️ Developer UtilitiesFree
Booklet page imposition order
saddle-stitch print sequence
S
POST /date/booklet-page-order$0.002📄 Documents & PDFFree
Label sheets needed calculator
labels ÷ per sheet, rounded up
A
POST /doc/label-sheets-needed$0.002⚙️ Developer UtilitiesFree
Oversize parcel surcharge calculator
overweight shipping fee
A
POST /ecom/oversize-surcharge$0.002⚙️ Developer UtilitiesFree
Shipping cost by zone calculator
weight times zone rate
S
POST /ecom/shipping-cost-by-zone$0.002⚙️ Developer UtilitiesFree
Cartons per pallet layer calculator
boxes on one pallet deck
A
POST /ecom/cartons-per-layer$0.002⚙️ Developer UtilitiesFree
Postage stamps needed calculator
cover letter or parcel postage
S
POST /ecom/stamps-needed$0.002⚙️ Developer UtilitiesFree
Household chore rotation calculator
assign chores fairly
S
POST /home/chore-rotation$0.002⚙️ Developer UtilitiesFree
Gym cost per visit calculator
membership math
A
POST /life/gym-cost-per-visit$0.002⚙️ Developer UtilitiesFree
Weeks lived so far calculator
full weeks from birth date
S
POST /date/weeks-lived$0.002⚙️ Developer UtilitiesFree
Work anniversary date calculator
next date and days remaining
A
POST /date/work-anniversary$0.002⚙️ Developer UtilitiesFree
Fraction of month elapsed calculator
% of the month, free
S
POST /date/fraction-of-month$0.002⚙️ Developer UtilitiesFree
Round to nearest multiple
five, ten or quarter, free
A
POST /math/round-to-multiple$0.002⚙️ Developer UtilitiesFree
Heart rate zones from reserve
percent HRR calculator, free
S
POST /health/hr-zones-percent-hrr$0.002⚙️ Developer UtilitiesFree
Gellish max heart rate calculator
207 − 0.7 × age, free
A
POST /health/hrmax-gellish$0.002⚙️ Developer UtilitiesFree
Weighted cost split calculator
each party's exact share free
S
POST /life/weighted-split$0.002⚙️ Developer UtilitiesFree
Maffetone 180 aerobic heart rate
MAF HR from age, free
S
POST /health/maffetone-aerobic-hr$0.002⚙️ Developer UtilitiesFree
Training impulse TRIMP calculator
Banister score from duration and HRR
S
POST /health/training-impulse-trimp$0.002⚙️ Developer UtilitiesFree
Marathon time predictor calculator
Riegel from a shorter race
A
POST /health/marathon-time-predict$0.002⚙️ Developer UtilitiesFree
Race pace band calculator
even km and mile clocks from a goal finish
A
POST /health/pace-band-splits$0.002⚙️ Developer UtilitiesFree
Treadmill incline equivalent pace calculator
flat pace from speed & grade
A
POST /health/treadmill-incline-pace$0.002⚙️ Developer UtilitiesFree
Sleep efficiency calculator
time asleep ÷ time in bed as %
S
POST /health/sleep-efficiency$0.002⚙️ Developer UtilitiesFree
Net torque calculator
sum CW and CCW torques about a pivot
A
POST /mech/net-torque$0.002⚙️ Developer UtilitiesFree
Gravity neutral point calculator
null field between two masses
A
POST /mech/gravity-null-point$0.002⚙️ Developer UtilitiesFree
Pendulum frequency calculator
simple period and f
A
POST /mech/pendulum-frequency$0.002⚙️ Developer UtilitiesFree
Principle of moments calculator
balance moments about a pivot
A
POST /mech/principle-of-moments$0.002⚙️ Developer UtilitiesFree
Force equilibrium checker
residual of coplanar forces
A
POST /mech/equilibrium-check$0.002⚙️ Developer UtilitiesFree
Long addition calculator
digit-by-digit sum with carry
S
POST /math/long-addition$0.002⚙️ Developer UtilitiesFree
Long subtraction calculator
digit-by-digit borrow, free
A
POST /math/long-subtraction$0.002⚙️ Developer UtilitiesFree
Lowest common denominator calculator
LCD of a list of fractions
P
POST /math/lowest-common-denominator$0.002⚙️ Developer UtilitiesFree
Fraction to Lowest Terms Calculator
F
POST /math/lowest-term$0.002⚙️ Developer UtilitiesFree
Luhn algorithm validator
check any number string
B
POST /math/luhn$0.002⚙️ Developer UtilitiesFree
Magic square generator
odd order via the Siamese method, free
S
POST /math/magic-square$0.002⚙️ Developer UtilitiesFree
Power calculator
raise a base to an exponent, free
A
POST /math/math-power$0.002⚙️ Developer UtilitiesFree
Matrix calculator
add, subtract, or multiply two matrices
P
POST /math/matrix$0.002⚙️ Developer UtilitiesFree
Matrix norm calculator
Frobenius, one and infinity norms
F
POST /math/matrix-norm$0.002⚙️ Developer UtilitiesFree
Mayan numeral converter
decimal to dots and bars
B
POST /math/mayan-numeral$0.002⚙️ Developer UtilitiesFree
Midsegment of a triangle calculator
F
POST /math/midsegment-of-a-triangle$0.002⚙️ Developer UtilitiesFree
Minutes to decimal degrees calculator
convert angle minutes
B
POST /math/minutes-to-decimals-degrees$0.002⚙️ Developer UtilitiesFree
Mixed Number to Improper Fraction Calculator
F
POST /math/mixed-number-to-improper-fraction$0.002⚙️ Developer UtilitiesFree
Integer palindrome checker
same forwards and backwards
S
POST /math/miracle$0.002⚙️ Developer UtilitiesFree
Missing side of a right triangle
find the third side from two sides
P
POST /math/missing-side-of-a-right-triangle$0.002⚙️ Developer UtilitiesFree
Mixed number converter
improper fraction to whole + remainder
A
POST /math/mixed-number$0.002⚙️ Developer UtilitiesFree
Modulo order of operations calculator
+ − × ÷ % PEMDAS
S
POST /math/modulo-order-of-operations$0.002⚙️ Developer UtilitiesFree
Multiplicative inverse calculator
reciprocal 1/x, free
A
POST /math/multiplicative-inverse$0.002⚙️ Developer UtilitiesFree
Multiplicative inverse modulo n
a⁻¹ via extended Euclidean
P
POST /math/multiplicative-inverse-modulo$0.002⚙️ Developer UtilitiesFree
Multiplying fractions
product in lowest terms, free
S
POST /math/multiplying-fractions$0.002⚙️ Developer UtilitiesFree
Multiplying radicals calculator
simplify the product of two roots
P
POST /math/multiplying-radicals$0.002⚙️ Developer UtilitiesFree
Natural log calculator
ln(x) of a positive number, free
A
POST /math/natural-log$0.002⚙️ Developer UtilitiesFree
Oblique triangle calculator
remaining sides and angles
S
POST /math/oblique-triangle$0.002⚙️ Developer UtilitiesFree
Obtuse triangle checker
three sides, converse of Pythagoras
A
POST /math/obtuse-triangle$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.