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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
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
Pallet Stack Height Calculator
Cartons, Layers and Pallet Base
B
POST /ecom/pallet-stack-height$0.002⚙️ Developer UtilitiesFree
Shipping cost by weight calculator
base charge plus weight rate
K
POST /ecom/shipping-cost-by-weight$0.002⚙️ Developer UtilitiesFree
Shipping margin calculator
profit or loss per shipment
K
POST /ecom/shipping-margin$0.002⚙️ Developer UtilitiesFree
Affordable bundle check calculator
test a two-good budget
K
POST /econ/affordable-bundle-check$0.002⚙️ Developer UtilitiesFree
Average Product of Labor Calculator
Output per Worker
K
POST /econ/average-product-labor$0.002⚙️ Developer UtilitiesFree
Average variable cost calculator
AVC = TVC / Q, free
S
POST /econ/average-variable-cost$0.002⚙️ Developer UtilitiesFree
Cobb-Douglas production output calculator
Q = A·K^α·L^β
S
POST /econ/cobb-douglas-output$0.002⚙️ Developer UtilitiesFree
Income CV calculator
scale-free inequality (σ/μ)
A
POST /econ/coefficient-of-variation-income$0.002⚙️ Developer UtilitiesFree
Four-Firm Concentration Ratio Calculator
Calculate CR4
F
POST /econ/concentration-ratio-cr4$0.002⚙️ Developer UtilitiesFree
Consumer Surplus Change Calculator
Price Change on Linear Demand
F
POST /econ/consumer-surplus-change-price$0.002⚙️ Developer UtilitiesFree
Consumer price index from basket calculator
K
POST /econ/cpi-from-basket$0.002⚙️ Developer UtilitiesFree
Cross exchange rate calculator
calculate rates through a common currency
K
POST /econ/cross-exchange-rate$0.002⚙️ Developer UtilitiesFree
Current account balance calculator
trade + income + transfers
S
POST /econ/current-account-balance$0.002⚙️ Developer UtilitiesFree
Deadweight Loss from a Price Floor Calculator
B
POST /econ/deadweight-loss-price-floor$0.002⚙️ Developer UtilitiesFree
Economies of Scale Calculator
Compare Long-Run Average Cost
F
POST /econ/economies-of-scale-check$0.002⚙️ Developer UtilitiesFree
Effective price after subsidy calculator
buyer net price free
S
POST /econ/effective-price-after-subsidy$0.002⚙️ Developer UtilitiesFree
Market equilibrium from linear demand and supply
P* and Q*
S
POST /econ/equilibrium-from-demand-supply-functions$0.002⚙️ Developer UtilitiesFree
Market Equilibrium with a Per-Unit Tax Calculator
K
POST /econ/equilibrium-with-tax$0.002⚙️ Developer UtilitiesFree
Fixed cost calculator
FC = total cost − total variable cost
A
POST /econ/fixed-cost-from-total$0.002⚙️ Developer UtilitiesFree
GDP deflator calculator
(nominal GDP / real GDP) × 100
A
POST /econ/gdp-deflator$0.002⚙️ Developer UtilitiesFree
GDP Per Capita Growth Rate Calculator
F
POST /econ/gdp-per-capita-growth$0.002⚙️ Developer UtilitiesFree
Giffen Good Check Calculator from Price and Quantity Data
K
POST /econ/giffen-good-check$0.002⚙️ Developer UtilitiesFree
HDI Education Index Calculator
Mean and Expected Schooling
K
POST /econ/hdi-education-index$0.002⚙️ Developer UtilitiesFree
HHI market concentration classification
competitive, moderate, high
S
POST /econ/hhi-market-classification$0.002⚙️ Developer UtilitiesFree
Import Expenditure Calculator
Price × Quantity
B
POST /econ/import-expenditure$0.002⚙️ Developer UtilitiesFree
Laffer Curve Tax Revenue Calculator
Find the Peak Tax Rate
F
POST /econ/laffer-curve-revenue$0.002⚙️ Developer UtilitiesFree
Lerner index calculator
market power (P−MC)/P
A
POST /econ/lerner-index$0.002⚙️ Developer UtilitiesFree
Loss-Minimizing Output Calculator
Produce or Shut Down
B
POST /econ/loss-minimizing-output$0.002⚙️ Developer UtilitiesFree
Marginal Cost vs Average Cost: Is ATC Rising or Falling?
K
POST /econ/marginal-cost-average-cost-relation$0.002⚙️ Developer UtilitiesFree
Marginal external cost calculator
MEC = MSC − MPC, free
S
POST /econ/marginal-external-cost$0.002⚙️ Developer UtilitiesFree
Marginal rate of substitution calculator
MRS = MU_x / MU_y
S
POST /econ/marginal-rate-of-substitution$0.002⚙️ Developer UtilitiesFree
Marginal Revenue from Total Revenue Calculator
B
POST /econ/marginal-revenue-from-total$0.002⚙️ Developer UtilitiesFree
Marginal Social Benefit Calculator
B
POST /econ/marginal-social-benefit$0.002⚙️ Developer UtilitiesFree
Marginal Utility from Total Utility Calculator
F
POST /econ/marginal-utility-from-total$0.002⚙️ Developer UtilitiesFree
Optimal markup from demand elasticity
inverse-elasticity rule
A
POST /econ/markup-from-elasticity$0.002⚙️ Developer UtilitiesFree
Mixed strategy Nash equilibrium 2×2 calculator
indifference probs
S
POST /econ/mixed-strategy-2x2$0.002⚙️ Developer UtilitiesFree
Monopoly Deadweight Loss Calculator for a Linear Market
K
POST /econ/monopoly-deadweight-loss$0.002⚙️ Developer UtilitiesFree
MPC from MPS calculator
MPC = 1 − MPS, free
S
POST /econ/mpc-from-mps$0.002⚙️ Developer UtilitiesFree
National income from GDP calculator
NDP, NNP, NI free
S
POST /econ/national-income-from-gdp$0.002⚙️ Developer UtilitiesFree
Nominal to Real Wage CPI Calculator
B
POST /econ/nominal-to-real-wage$0.002⚙️ Developer UtilitiesFree
Okun's law output gap calculator
estimate GDP gap
B
POST /econ/okun-law-output-gap$0.002⚙️ Developer UtilitiesFree
Opportunity cost ratio calculator
PPF slope between two goods
S
POST /econ/opportunity-cost-ratio$0.002⚙️ Developer UtilitiesFree
Optimal Consumption Calculator
Compare MRS with the Price Ratio
B
POST /econ/optimal-consumption-mrs-price-ratio$0.002⚙️ Developer UtilitiesFree
Output Gap Calculator
Actual vs Potential GDP
F
POST /econ/output-gap$0.002⚙️ Developer UtilitiesFree
Payoff Matrix Expected Value Calculator for Mixed Strategies
F
POST /econ/payoff-matrix-expected-value$0.002⚙️ Developer UtilitiesFree
Third-Degree Price Discrimination Calculator
B
POST /econ/price-discrimination-two-markets$0.002⚙️ Developer UtilitiesFree
Price elasticity of demand midpoint calculator
arc PED, free
S
POST /econ/price-elasticity-demand-midpoint$0.002⚙️ Developer UtilitiesFree
Price Floor Surplus Calculator
Excess Supply from Linear Curves
F
POST /econ/price-floor-surplus$0.002⚙️ Developer UtilitiesFree
Quantity supplied from a linear supply function calculator
K
POST /econ/quantity-supplied-linear$0.002⚙️ Developer UtilitiesFree
Quantity theory of money calculator
solve MV=PQ for M, V, P or Q
A
POST /econ/quantity-theory-money$0.002⚙️ Developer UtilitiesFree
Quintile Income Share Ratio Calculator (S80/S20)
B
POST /econ/quintile-share-ratio$0.002⚙️ Developer UtilitiesFree
Real exchange rate calculator
e × (P* / P) relative purchasing power
A
POST /econ/real-exchange-rate$0.002⚙️ Developer UtilitiesFree
Required Reserves Calculator
Find Excess Reserves
K
POST /econ/required-reserves$0.002⚙️ Developer UtilitiesFree
Second-price auction calculator
Vickrey winner and price paid
A
POST /econ/second-price-auction$0.002⚙️ Developer UtilitiesFree
Two-Player Shapley Value Calculator
Fair Surplus Allocation
K
POST /econ/shapley-value-two-player$0.002⚙️ Developer UtilitiesFree
Subsidy incidence calculator
buyer and seller share
F
POST /econ/subsidy-incidence-share$0.002⚙️ Developer UtilitiesFree
Per-Unit Subsidy Market Effect Calculator
K
POST /econ/subsidy-market-effect$0.002⚙️ Developer UtilitiesFree
Supply schedule table from linear supply function
Qs by price
S
POST /econ/supply-schedule-from-function$0.002⚙️ Developer UtilitiesFree
Supply Shift New Equilibrium Calculator
B
POST /econ/supply-shift-new-equilibrium$0.002⚙️ Developer UtilitiesFree
Tariff Consumer Surplus Loss Calculator
B
POST /econ/tariff-consumer-loss$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.