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
$0.002per call, from
The full catalog
Search or filter by category. Every capability is its own endpoint with a published price.
⚙️ Developer UtilitiesFree
Conical pendulum calculator
period and speed from length and angle
S
POST /mech/conical-pendulum$0.002⚙️ Developer UtilitiesFree
Tangential acceleration calculator
a_t = α·r free online
A
POST /mech/tangential-acceleration$0.002⚙️ Developer UtilitiesFree
Seeded numeric PIN generator
reproducible PINs with pattern checks
B
POST /security/password-pin-seeded$0.002⚙️ Developer UtilitiesFree
Generate an acrostic poem skeleton from any word
K
POST /str/acrostic-generate$0.002⚙️ Developer UtilitiesFree
Circumference to diameter
diameter from circumference online
H
POST /math/circumference-to-diameter$0.002⚙️ Developer UtilitiesFree
Conservation of energy calculator
speed from height change
S
POST /mech/conservation-mechanical-energy$0.002⚙️ Developer UtilitiesFree
Change in potential energy calculator
ΔPE = m·g·Δh in joules, free
P
POST /mech/gravitational-pe-change$0.002⚙️ Developer UtilitiesFree
Circumference and area of a circle
2·π·r and π·r² from the radius
A
POST /math/circumference-area-circle$0.002⚙️ Developer UtilitiesFree
Circumference to Radius Calculator
Free Online
G
POST /math/circumference-to-radius$0.002⚙️ Developer UtilitiesFree
Circumscribed circle
center and radius of the circle through three points
A
POST /math/circumscribed-circle$0.002⚙️ Developer UtilitiesFree
Classifying triangles by sides and angles
free
G
POST /math/classifying-triangles$0.002⚙️ Developer UtilitiesFree
Clock angle calculator
degrees between the hour and minute hands
H
POST /math/clock-angle$0.002⚙️ Developer UtilitiesFree
Impact force calculator
average force from KE and stopping distance
S
POST /mech/impact-force-stopping-distance$0.002⚙️ Developer UtilitiesFree
Power to lift load calculator
watts from mass, height and time (P=mgh/t)
A
POST /mech/power-to-lift$0.002⚙️ Developer UtilitiesFree
Work to raise a mass calculator
W = m·g·h in joules, free
P
POST /mech/work-against-gravity$0.002📈 SEOFree
Recommended hashtag count by platform
B
POST /seo/hashtag-count-recommend$0.002📈 SEOFree
Social media character limit checker
count characters by platform
K
POST /seo/social-post-length-limit-check$0.002🎬 VideoFree
Check whether a video aspect ratio matches a platform requirement
F
POST /video/video-aspect-platform-check$0.002⚙️ Developer UtilitiesFree
Brand palette usage ratio checker
compare color coverage
F
POST /date/brand-color-usage-ratio-check$0.002⚙️ Developer UtilitiesFree
Cofactor expansion calculator
det(A) along any row or column, free
G
POST /math/cofactor-expansion-old$0.002⚙️ Developer UtilitiesFree
Cofactor matrix calculator
every cofactor C(i,j) of a square matrix
H
POST /math/cofactor-matrix$0.002⚙️ Developer UtilitiesFree
Cofunction calculator
sin cos tan cot sec csc via the complementary angle
A
POST /math/cofunction$0.002⚙️ Developer UtilitiesFree
Climbing power calculator
watts from body weight, vertical gain & time
S
POST /mech/climbing-power$0.002⚙️ Developer UtilitiesFree
Input power required calculator
P_in = P_out / η
P
POST /mech/input-power-required$0.002⚙️ Developer UtilitiesFree
Kinetic energy lost in collision calculator
perfectly inelastic ΔKE
A
POST /mech/kinetic-energy-lost-collision$0.002📈 SEOFree
Validate UTM campaign naming conventions
B
POST /seo/utm-campaign-name-validate$0.002⚙️ Developer UtilitiesFree
Sprint burndown calculator
required daily velocity
B
POST /biz/burndown-remaining-estimate$0.002⚙️ Developer UtilitiesFree
Calculate OKR key result progress percentage
F
POST /biz/okr-progress-percent$0.002⚙️ Developer UtilitiesFree
Team sprint capacity calculator
focus factor and story points
F
POST /biz/team-capacity-planning$0.002⚙️ Developer UtilitiesFree
Calculate agile team average velocity and planning velocity
K
POST /date/velocity-average-calculate$0.002⚙️ Developer UtilitiesFree
Coin rotation paradox
rotations of a circle rolling around another, free
A
POST /math/coin-rotation-paradox$0.002⚙️ Developer UtilitiesFree
Column space calculator
basis from pivot columns, free
H
POST /math/column-space$0.002⚙️ Developer UtilitiesFree
Center of mass velocity calculator
v_cm from masses and velocities
P
POST /mech/center-of-mass-velocity$0.002⚙️ Developer UtilitiesFree
Coefficient of restitution calculator
e = v_sep / v_app
S
POST /mech/coefficient-of-restitution$0.002⚙️ Developer UtilitiesFree
Rocket thrust calculator
F = ṁ·v_e in newtons free
A
POST /mech/rocket-thrust$0.002⚙️ Developer UtilitiesFree
Customer Account Health Score Calculator
Weighted Composite
B
POST /biz/customer-health-score-calc$0.002⚙️ Developer UtilitiesFree
KPI gap to target calculator
absolute and percentage remaining
K
POST /biz/kpi-target-gap-calc$0.002⚙️ Developer UtilitiesFree
Estimate contract renewal risk category from customer health
F
POST /biz/renewal-probability-estimate$0.002⚙️ Developer UtilitiesFree
Least common denominator calculator
LCD of two fractions
G
POST /math/common-denominator$0.002⚙️ Developer UtilitiesFree
Common factor calculator
shared factors of two or more integers, sorted
H
POST /math/common-factor$0.002⚙️ Developer UtilitiesFree
Final angular velocity calculator
ω = ω₀ + αt, free
P
POST /mech/angular-velocity-final$0.002⚙️ Developer UtilitiesFree
Impulse from force graph calculator
triangular force-time pulse area
A
POST /mech/impulse-from-force-graph$0.002⚙️ Developer UtilitiesFree
Two-dimensional collision calculator
2D inelastic common velocity, free
S
POST /mech/two-body-collision-2d$0.002⚙️ Developer UtilitiesFree
Leftover food safety window
USDA-style use-by dates by category, free
G
POST /life/leftover-food-safety-window$0.002⚙️ Developer UtilitiesFree
Convert oven temperature scale
Celsius, Fahrenheit and gas mark
A
POST /life/oven-temp-convert$0.002⚙️ Developer UtilitiesFree
Travel packing list generator
a checklist scaled to your trip
H
POST /life/packing-list-generate$0.002⚙️ Developer UtilitiesFree
Complementary room color scheme
wall, trim and accent from one hex
P
POST /life/paint-color-room-match$0.002⚙️ Developer UtilitiesFree
Pet food portion calculator
daily grams and cups for dogs or cats
K
POST /life/pet-food-portion$0.002⚙️ Developer UtilitiesFree
Houseplant watering schedule calculator by pot size
F
POST /life/plant-watering-schedule$0.002⚙️ Developer UtilitiesFree
Scale Recipe Ingredient Quantities by Serving Count
K
POST /life/recipe-scale-servings$0.002⚙️ Developer UtilitiesFree
Convert recipe cooking units
cup, tbsp, tsp, ml, g, oz free
S
POST /life/recipe-unit-convert$0.002⚙️ Developer UtilitiesFree
Least common multiple calculator
LCM of two integers, free online
A
POST /math/common-multiple$0.002⚙️ Developer UtilitiesFree
Newborn feeding schedule calculator
feeds and volume by age
A
POST /life/baby-feeding-schedule$0.002⚙️ Developer UtilitiesFree
Baby growth percentile lookup
estimate weight or height band
B
POST /life/baby-growth-percentile$0.002⚙️ Developer UtilitiesFree
Split household chores schedule
fair weekly roommate rotation free
A
POST /life/chore-split-roommates$0.002⚙️ Developer UtilitiesFree
Flashcard spaced repetition calculator
next review date
K
POST /life/flashcard-spaced-repetition$0.002⚙️ Developer UtilitiesFree
Split a gift budget among recipients by priority
F
POST /life/gift-budget-split$0.002⚙️ Developer UtilitiesFree
Convert pet age to human years
dog, cat & more, free
S
POST /life/pet-age-human-years$0.002⚙️ Developer UtilitiesFree
Estimate time to finish a reading list
finish date per book
G
POST /life/reading-list-time-estimate$0.002⚙️ Developer UtilitiesFree
Build exam study schedule
hours per day by subject difficulty
P
POST /life/study-schedule-build$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.