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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
Slant height calculator
cone radius and height
P
POST /math/slant-height$0.002⚙️ Developer UtilitiesFree
Solving by completing the square
real quadratic roots, free
P
POST /math/solving-by-completing-the-square$0.002⚙️ Developer UtilitiesFree
Sphere equation
center radius and general form
A
POST /math/sphere-equation$0.002⚙️ Developer UtilitiesFree
Square feet of a rectangle
area from length × width
P
POST /math/square-feet-of-rectangle$0.002⚙️ Developer UtilitiesFree
Triangle square feet calculator
area from base × height
A
POST /math/square-feet-triangle$0.002⚙️ Developer UtilitiesFree
Standard form calculator
integer Ax + By = C
A
POST /math/standard-form$0.002⚙️ Developer UtilitiesFree
Square of a binomial
expand (ax+b)² to a², 2ab, b²
P
POST /math/square-of-a-binomial$0.002⚙️ Developer UtilitiesFree
Star shape calculator
pointed star area and perimeter
A
POST /math/star-shape$0.002⚙️ Developer UtilitiesFree
Substitution method
solve two-variable linear systems, free
P
POST /math/substitution-method$0.002⚙️ Developer UtilitiesFree
Sum and difference identities
sin and cos of a±b, free
A
POST /math/sum-difference-identities$0.002⚙️ Developer UtilitiesFree
Sum of series calculator
first n arithmetic or geometric terms
P
POST /math/sum-of-series$0.002⚙️ Developer UtilitiesFree
Surface area of a triangular prism
SA from sides and length
P
POST /math/surface-area-of-a-triangular-prism$0.002⚙️ Developer UtilitiesFree
Surface area calculator
cube, sphere, cylinder, cone
A
POST /math/surface-area$0.002⚙️ Developer UtilitiesFree
Surface area to volume ratio
cube, sphere or cylinder
P
POST /math/surface-area-volume-ratio$0.002⚙️ Developer UtilitiesFree
Systems of equations solver
unique x and y, free
A
POST /math/systems-of-equations$0.002⚙️ Developer UtilitiesFree
Tangent of an angle
tan(θ) in degrees or radians, free
A
POST /math/tangent-angle$0.002⚙️ Developer UtilitiesFree
Tangent circle calculator
length from an external point
P
POST /math/tangent-circle$0.002⚙️ Developer UtilitiesFree
Tensor product calculator
Kronecker product of two matrices
P
POST /math/tensor-product$0.002⚙️ Developer UtilitiesFree
Tan inverse calculator
arctan of a number in radians or degrees
A
POST /math/tan-inverse$0.002⚙️ Developer UtilitiesFree
Trapezoid area
(base a + base b) / 2 × height
P
POST /math/trapezoid$0.002⚙️ Developer UtilitiesFree
Trapezoid height calculator
area and two bases, free
A
POST /math/trapezoid-height$0.002⚙️ Developer UtilitiesFree
30-60-90 triangle sides
from one given side and position
P
POST /math/triangle-30-60-90$0.002⚙️ Developer UtilitiesFree
Triangle angle calculator
missing interior angle from two angles
A
POST /math/triangle-angle$0.002⚙️ Developer UtilitiesFree
Triangle degree calculator
third angle from two given angles
P
POST /math/triangle-degree$0.002⚙️ Developer UtilitiesFree
Triangle proportionality theorem
missing segment length
A
POST /math/triangle-proportionality-theorem$0.002⚙️ Developer UtilitiesFree
Triangle ratio calculator
unknown side from a known side
P
POST /math/triangle-ratio$0.002⚙️ Developer UtilitiesFree
Triangle side calculator
missing side by Pythagoras
A
POST /math/triangle-side$0.002⚙️ Developer UtilitiesFree
Triangle side from two sides and included angle
law of cosines
P
POST /math/triangle-side-angle$0.002⚙️ Developer UtilitiesFree
Triangle sum theorem
verify three interior angles add to 180°
A
POST /math/triangle-sum-theorem$0.002⚙️ Developer UtilitiesFree
Triangle vertices calculator
area, perimeter and sides
P
POST /math/triangle-vertices$0.002⚙️ Developer UtilitiesFree
Trig functions
sin cos tan from angle
A
POST /math/trig$0.002⚙️ Developer UtilitiesFree
Trig identities calculator
Pythagorean and double-angle
P
POST /math/trig-identities$0.002⚙️ Developer UtilitiesFree
Six trigonometric functions from radians
A
POST /math/trigonometric-functions$0.002⚙️ Developer UtilitiesFree
Truncated cone calculator
volume and surface from two radii and height
P
POST /math/truncated-cone$0.002⚙️ Developer UtilitiesFree
Two's complement
signed integer to fixed-width binary, free
A
POST /math/twos-complement$0.002⚙️ Developer UtilitiesFree
Unit rate calculator
rate per unit from total and count
P
POST /math/unit-rate$0.002⚙️ Developer UtilitiesFree
Vector calculator
magnitude and direction from x and y
A
POST /math/vector$0.002⚙️ Developer UtilitiesFree
Vector addition calculator
add two vectors by components
P
POST /math/vector-addition$0.002⚙️ Developer UtilitiesFree
Volume calculator
cube, box, sphere, cylinder, cone
A
POST /math/volume$0.002⚙️ Developer UtilitiesFree
Volume of a triangular prism
V from base, triangle height and length
P
POST /math/volume-of-a-triangular-prism$0.002⚙️ Developer UtilitiesFree
Width of a rectangle calculator
from area and length, free
A
POST /math/width-of-a-rectangle$0.002⚙️ Developer UtilitiesFree
Y-intercept calculator
find b from slope and a point
P
POST /math/y-intercept$0.002⚙️ Developer UtilitiesFree
Add time calculator
sum two hours minutes seconds durations
P
POST /life/add-time$0.002⚙️ Developer UtilitiesFree
Add hours to a time
new clock and day offset, free
A
POST /life/adding-hours$0.002⚙️ Developer UtilitiesFree
Age calculator
whole years from two dates, free
A
POST /life/age$0.002⚙️ Developer UtilitiesFree
Age in hours calculator
convert years to hours (365.25 days/year)
P
POST /life/age-in-hours$0.002⚙️ Developer UtilitiesFree
Age in seconds calculator
convert years to total seconds
A
POST /life/age-in-seconds$0.002⚙️ Developer UtilitiesFree
Age in years, months and days
exact civil age from two dates
P
POST /life/age-in-years-months-and-days$0.002⚙️ Developer UtilitiesFree
Days until birthday
next birthday countdown from a birth date
A
POST /life/age-to-birthday$0.002⚙️ Developer UtilitiesFree
Appliance wattage calculator
daily electricity cost from watts
P
POST /life/appliance-wattage$0.002⚙️ Developer UtilitiesFree
Baby age calculator
weeks and months from two dates
A
POST /life/baby-age$0.002⚙️ Developer UtilitiesFree
Balloon arch calculator
balloons needed from length in feet
P
POST /life/balloon-arch$0.002⚙️ Developer UtilitiesFree
Bathroom mirror size
width height coverage
A
POST /life/bathroom-mirror-size$0.002⚙️ Developer UtilitiesFree
Beauty product lasts calculator
days of use from size and daily amount
P
POST /life/beauty-products$0.002⚙️ Developer UtilitiesFree
Bed size calculator
mattress dimensions
A
POST /life/bed-size$0.002⚙️ Developer UtilitiesFree
Binge-watching calculator
hours and days to finish a series
A
POST /life/binge-watching$0.002⚙️ Developer UtilitiesFree
Birth year calculator
year of birth from age, free
A
POST /life/birth-year$0.002⚙️ Developer UtilitiesFree
Birthday weekday calculator
what day your birthday falls on
P
POST /life/birthday$0.002⚙️ Developer UtilitiesFree
Bold text
wrap a string in ** markdown, free
P
POST /life/bold-text$0.002⚙️ Developer UtilitiesFree
Bra size calculator
band and cup from underbust and bust
P
POST /life/bra-size$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.