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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7554ready-made tools
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
Estimate Parking Spaces Needed for a Building
B
POST /travel/parking-lot-space-count-estimate$0.002⚙️ Developer UtilitiesFree
Compare Book Cost per Page
Find the Better Value
F
POST /date/book-cost-per-page-compare$0.002⚙️ Developer UtilitiesFree
Laundry Cost per Load Calculator for Water and Electricity
B
POST /home/laundry-load-cost-estimate$0.002⚙️ Developer UtilitiesFree
Gym membership cost per visit calculator
divide monthly fee by visits
K
POST /life/gym-membership-cost-per-visit$0.002⚙️ Developer UtilitiesFree
Crosswind heading calculator
correction angle and ground speed
S
POST /mech/crosswind-correction$0.002⚙️ Developer UtilitiesFree
Thrown downward motion calculator
displacement and final velocity
A
POST /mech/thrown-downward$0.002🎬 VideoFree
Streaming service cost per hour watched calculator
B
POST /video/streaming-cost-per-hour-watched$0.002⚙️ Developer UtilitiesFree
Hot desk utilization rate calculator
F
POST /home/desk-booking-utilization-rate$0.002⚙️ Developer UtilitiesFree
Order a Book Series by Publication or Chronological Order
K
POST /life/book-series-reading-order$0.002⚙️ Developer UtilitiesFree
Centroid of a triangle
the average of its three vertices
A
POST /math/centroid-of-a-triangle$0.002⚙️ Developer UtilitiesFree
Change of base calculator
log in any base from value and base
H
POST /math/change-of-base$0.002⚙️ Developer UtilitiesFree
Characteristic polynomial calculator
matrix coefficients, free
G
POST /math/characteristic-polynomial$0.002⚙️ Developer UtilitiesFree
Average velocity from displacement calculator
signed Δx/Δt free
A
POST /mech/average-velocity-displacement$0.002⚙️ Developer UtilitiesFree
Two-phase accelerate-cruise calculator
distance and time from rest
S
POST /mech/two-stage-motion$0.002⚙️ Developer UtilitiesFree
Velocity-time graph area calculator
displacement from u, v, and t
P
POST /mech/vt-graph-displacement$0.002⚙️ Developer UtilitiesFree
Annual commute time calculator
total hours per year
K
POST /travel/commute-time-annual-total$0.002📄 Documents & PDFFree
Identify paper size from dimensions in mm or inches
F
POST /doc/paper-size-from-dimensions$0.002⚙️ Developer UtilitiesFree
Check similarity in right triangles
proportional sides test via API
H
POST /math/check-similarity-in-right-triangles$0.002⚙️ Developer UtilitiesFree
Chinese remainder calculator
solve simultaneous congruences
G
POST /math/chinese-remainder$0.002⚙️ Developer UtilitiesFree
Friction stopping distance calculator
d = v²/(2μg) from speed and μ
P
POST /mech/friction-stopping-distance$0.002⚙️ Developer UtilitiesFree
Projectile clears wall calculator
speed, angle, height
A
POST /mech/projectile-clears-wall$0.002⚙️ Developer UtilitiesFree
Optimal launch angle calculator
max range on level ground
S
POST /mech/projectile-max-range-angle$0.002⚙️ Developer UtilitiesFree
Projectile velocity at time
speed and direction with gravity
P
POST /mech/projectile-velocity-at-time$0.002🎬 VideoFree
Concert setlist time budget calculator
fit songs and banter
B
POST /video/concert-setlist-time-budget$0.002🎬 VideoFree
Movie end time calculator
add runtime, trailers and ads
F
POST /video/movie-runtime-showtime-calc$0.002🎬 VideoFree
Playlist total duration calculator
total runtime and average track length
K
POST /video/playlist-total-duration$0.002⚙️ Developer UtilitiesFree
Postage stamp calculator
find how many stamps you need
B
POST /date/postage-stamp-count$0.002📄 Documents & PDFFree
QR code error correction capacity lookup
versions 1 to 40
F
POST /doc/qr-code-error-correction-capacity$0.002⚙️ Developer UtilitiesFree
Calculate shipping dimensional weight and billable weight
K
POST /ecom/shipping-dimensional-weight$0.002⚙️ Developer UtilitiesFree
Cholesky decomposition calculator
lower triangular factor L, free
A
POST /math/cholesky-decomposition$0.002⚙️ Developer UtilitiesFree
Circle center from three points
center coordinates and radius
H
POST /math/circle-center$0.002⚙️ Developer UtilitiesFree
Circle diameter calculator
from radius, circumference or area
G
POST /math/circle-diameter$0.002⚙️ Developer UtilitiesFree
Atwood machine tension calculator
cord tension T = 2 m1 m2 g / (m1+m2)
A
POST /mech/atwood-tension$0.002⚙️ Developer UtilitiesFree
Frictionless incline acceleration calculator
a = g sin θ free
S
POST /mech/incline-acceleration-frictionless$0.002📄 Documents & PDFFree
Recommend a barcode symbology for your use case
K
POST /doc/barcode-symbology-recommend$0.002📄 Documents & PDFFree
Suggest a font pairing by style
heading and body font ideas
F
POST /doc/font-pairing-suggest$0.002📄 Documents & PDFFree
QR Code Version Calculator
Estimate Capacity by Error Correction
B
POST /doc/qr-code-capacity-estimate$0.002⚙️ Developer UtilitiesFree
Circle length calculator
circumference from radius or diameter
G
POST /math/circle-length$0.002⚙️ Developer UtilitiesFree
Elevator apparent weight calculator
N = m(g+a), free
S
POST /mech/elevator-apparent-weight$0.002⚙️ Developer UtilitiesFree
Blocks in contact force calculator
acceleration & contact force
P
POST /mech/two-block-contact-force$0.002📄 Documents & PDFFree
Generate a typographic type scale for heading levels
K
POST /doc/typography-scale-generate$0.002⚙️ Developer UtilitiesFree
Circle formula
standard and general equation from center and radius
A
POST /math/circle-formula$0.002⚙️ Developer UtilitiesFree
Circle measurements
area, circumference and diameter from radius
H
POST /math/circle-measurements$0.002⚙️ Developer UtilitiesFree
Equilibrant force calculator
balance coplanar force components
P
POST /mech/equilibrant-force$0.002⚙️ Developer UtilitiesFree
Action-reaction force calculator
Newton's third law pair
A
POST /mech/newton-third-law-pair$0.002⚙️ Developer UtilitiesFree
Wedge mechanical advantage calculator
ideal IMA = length ÷ thickness
S
POST /mech/wedge-mechanical-advantage$0.002⚙️ Developer UtilitiesFree
Seeded random number generator in a range
integer or float
B
POST /prob/random-number-range$0.002⚙️ Developer UtilitiesFree
Seeded random string generator
create repeatable text
F
POST /prob/random-string-seeded$0.002⚙️ Developer UtilitiesFree
Seeded coin flip simulator
reproducible heads and tails
B
POST /game/coin-flip-seeded$0.002⚙️ Developer UtilitiesFree
Seeded dice roller
reproducible dice results
K
POST /game/dice-roll-seeded$0.002⚙️ Developer UtilitiesFree
Pick a random name from a list with a reproducible seed
F
POST /game/name-picker-seeded$0.002⚙️ Developer UtilitiesFree
Circle perimeter calculator
from the radius, free online
G
POST /math/circle-perimeter$0.002⚙️ Developer UtilitiesFree
Circle theorems calculator
inscribed, central and related angles
A
POST /math/circle-theorems$0.002⚙️ Developer UtilitiesFree
Circumcenter of a triangle
center of the circumscribed circle
H
POST /math/circumcenter-of-a-triangle$0.002⚙️ Developer UtilitiesFree
Force for constant speed calculator
F = μ·W on a rough floor
P
POST /mech/force-constant-speed-friction$0.002⚙️ Developer UtilitiesFree
Period of circular motion calculator
T = 2πr/v free online
A
POST /mech/period-circular-motion$0.002⚙️ Developer UtilitiesFree
Time to slide down incline calculator
rough plane, free
S
POST /mech/time-slide-down-incline$0.002⚙️ Developer UtilitiesFree
Convert text to the NATO phonetic alphabet
Alpha, Bravo, Charlie
F
POST /enc/nato-phonetic-convert$0.002⚙️ Developer UtilitiesFree
Circumference calculator
from the diameter, free online
G
POST /math/circumference$0.002⚙️ Developer UtilitiesFree
RPM to angular frequency calculator
ω = 2π·(rpm/60) in rad/s
P
POST /mech/angular-frequency-from-rpm$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.