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
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The full catalog
Search or filter by category. Every capability is its own endpoint with a published price.
⚙️ Developer UtilitiesFree
Quintile calculator
four cuts that split data into five groups
S
POST /stat/quintiles$0.002⚙️ Developer UtilitiesFree
Standard error of the mean calculator
SEM = s/√n, free
A
POST /stat/standard-error-mean$0.002⚙️ Developer UtilitiesFree
Winsorized Mean Calculator
Reduce the Effect of Extreme Values
F
POST /stat/winsorized-mean$0.002⚙️ Developer UtilitiesFree
Class Width Calculator for Frequency Tables
B
POST /stat/class-width$0.002⚙️ Developer UtilitiesFree
Cumulative Frequency Calculator for Class Counts
F
POST /stat/cumulative-frequency$0.002⚙️ Developer UtilitiesFree
Grouped data mode calculator
interpolate the modal value
K
POST /stat/grouped-mode$0.002⚙️ Developer UtilitiesFree
Moment coefficient of skewness calculator
third central moment
P
POST /stat/moment-skewness$0.002⚙️ Developer UtilitiesFree
Standardized moment calculator
k-th central moment ÷ σ^k
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POST /stat/standardized-moment$0.002⚙️ Developer UtilitiesFree
Kendall tau correlation calculator
concordant and discordant pairs
F
POST /stat/kendall-tau$0.002⚙️ Developer UtilitiesFree
Mean deviation about median calculator
MAD from the median, free
S
POST /stat/mean-deviation-median$0.002⚙️ Developer UtilitiesFree
Pearson mode skewness calculator
(mean − mode) / standard deviation
A
POST /stat/pearson-mode-skewness$0.002⚙️ Developer UtilitiesFree
Regression intercept calculator
least-squares y-intercept
K
POST /stat/regression-intercept$0.002⚙️ Developer UtilitiesFree
Sample covariance calculator
covariance with n minus one
B
POST /stat/sample-covariance$0.002⚙️ Developer UtilitiesFree
Scott's rule bin width calculator
optimal histogram h from σ and n
P
POST /stat/scott-rule$0.002⚙️ Developer UtilitiesFree
Concordance correlation coefficient calculator
Lin's CCC for two series
S
POST /stat/concordance-correlation$0.002⚙️ Developer UtilitiesFree
Cubic regression calculator
third-degree least-squares coefficients
F
POST /stat/cubic-regression$0.002⚙️ Developer UtilitiesFree
Line of best fit calculator
slope, intercept, and predictions
K
POST /stat/line-of-best-fit$0.002⚙️ Developer UtilitiesFree
Mean Absolute Percentage Error (MAPE) Calculator
F
POST /stat/mape-error$0.002⚙️ Developer UtilitiesFree
Partial correlation calculator
r_xy.z from three pairwise r
P
POST /stat/partial-correlation$0.002⚙️ Developer UtilitiesFree
Power regression calculator
fit y = a·x^b by log least squares
S
POST /stat/power-regression$0.002⚙️ Developer UtilitiesFree
Standard error of the estimate
SEE residual size, free
A
POST /stat/standard-error-estimate$0.002⚙️ Developer UtilitiesFree
At least one event probability calculator
independent trials
B
POST /stat/at-least-one$0.002⚙️ Developer UtilitiesFree
Coin toss streak probability calculator
chance of consecutive heads
F
POST /stat/coin-streak$0.002⚙️ Developer UtilitiesFree
Complement probability calculator
P(not A) = 1 − P(A), free
A
POST /stat/complement-probability$0.002⚙️ Developer UtilitiesFree
Expected payoff calculator for games and gambles
B
POST /stat/expected-payoff$0.002⚙️ Developer UtilitiesFree
Lottery jackpot odds calculator
match all numbers, free
S
POST /stat/lottery-odds$0.002⚙️ Developer UtilitiesFree
Marginal probability calculator
joint table to P(X) or P(Y)
A
POST /stat/marginal-probability$0.002⚙️ Developer UtilitiesFree
Mutually Exclusive Events Checker
Test Two Probabilities
K
POST /stat/mutually-exclusive-check$0.002⚙️ Developer UtilitiesFree
Binomial Mean and Variance Calculator
B
POST /stat/binomial-mean-variance$0.002⚙️ Developer UtilitiesFree
Expected value of a dice roll
n dice × s sides average total
S
POST /stat/expected-dice-roll$0.002⚙️ Developer UtilitiesFree
Geometric CDF calculator
probability of success within k trials
F
POST /stat/geometric-cdf$0.002⚙️ Developer UtilitiesFree
Poisson at least probability calculator
P(X ≥ k) from rate λ
P
POST /stat/poisson-at-least$0.002⚙️ Developer UtilitiesFree
Poisson PMF calculator
P(X=k) = e^{−λ} λ^k / k!
A
POST /stat/poisson-pmf$0.002⚙️ Developer UtilitiesFree
Probability of Neither Event Calculator
Find P(Neither A nor B)
K
POST /stat/probability-neither$0.002⚙️ Developer UtilitiesFree
Two-stage probability tree calculator
calculate every path
F
POST /stat/probability-tree-two-stage$0.002⚙️ Developer UtilitiesFree
Discrete RV standard deviation
σ from values and probabilities
P
POST /stat/std-dev-discrete-rv$0.002⚙️ Developer UtilitiesFree
Continuous uniform CDF calculator
cumulative probability
K
POST /stat/continuous-uniform-cdf$0.002⚙️ Developer UtilitiesFree
Negative Binomial Mean and Variance Calculator
B
POST /stat/negative-binomial-mean-variance$0.002⚙️ Developer UtilitiesFree
Normal distribution CDF calculator
Φ(x) from mean and σ
S
POST /stat/normal-cdf$0.002⚙️ Developer UtilitiesFree
Z-score from normal value calculator
z = (x − μ) / σ, free
A
POST /stat/normal-z-from-x$0.002⚙️ Developer UtilitiesFree
Percentile to z-score calculator
inverse normal distribution
F
POST /stat/percentile-to-z$0.002⚙️ Developer UtilitiesFree
Confidence Interval for Variance Calculator
B
POST /stat/ci-variance$0.002⚙️ Developer UtilitiesFree
Exponential mean and variance calculator
μ, σ², σ from rate λ
S
POST /stat/exponential-mean-variance$0.002⚙️ Developer UtilitiesFree
F Critical Value Calculator
Numerator and Denominator Degrees of Freedom
K
POST /stat/f-critical-value$0.002⚙️ Developer UtilitiesFree
Gamma distribution PDF calculator
shape, rate and x
F
POST /stat/gamma-pdf$0.002⚙️ Developer UtilitiesFree
Probability distribution validity checker
PMF sums to 1, no negatives
A
POST /stat/pmf-validity$0.002⚙️ Developer UtilitiesFree
Standard normal probability calculator
area between two z bounds
P
POST /stat/standard-normal-probability$0.002⚙️ Developer UtilitiesFree
Student t Distribution CDF Calculator
B
POST /stat/t-cdf$0.002⚙️ Developer UtilitiesFree
Confidence interval for paired differences
t-based mean CI, free
P
POST /stat/ci-paired-mean$0.002⚙️ Developer UtilitiesFree
Clopper-Pearson Exact Confidence Interval Calculator
F
POST /stat/clopper-pearson$0.002⚙️ Developer UtilitiesFree
Confidence Level and Alpha Calculator
Significance and Tail Areas
B
POST /stat/confidence-level-alpha$0.002⚙️ Developer UtilitiesFree
P-value from z-score calculator
one- or two-tailed
F
POST /stat/p-value-z$0.002⚙️ Developer UtilitiesFree
Sample Size for a Proportion Calculator
K
POST /stat/sample-size-proportion$0.002⚙️ Developer UtilitiesFree
Standard error of a proportion calculator
SE = √(p(1−p)/n), free
A
POST /stat/se-proportion$0.002⚙️ Developer UtilitiesFree
One-Sample T-Test Calculator
T Statistic, Degrees of Freedom and P-Value
K
POST /stat/t-test-one-sample$0.002⚙️ Developer UtilitiesFree
Two-tailed critical value calculator
±z from significance level α
S
POST /stat/two-tailed-critical$0.002⚙️ Developer UtilitiesFree
Bartlett test calculator
compare variances across groups
F
POST /stat/bartlett-test$0.002⚙️ Developer UtilitiesFree
Chi-square independence test calculator
contingency table χ², df, p-value
S
POST /stat/chi-square-independence$0.002⚙️ Developer UtilitiesFree
Mann-Whitney U Test Calculator with P-Value
B
POST /stat/mann-whitney-u$0.002⚙️ Developer UtilitiesFree
P-value from F statistic calculator
upper-tail F(df1, df2), free
A
POST /stat/p-value-f$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.