Probability Calculators
probability-calc.x402tookit.com · 5 paid endpoints · listed 2026-11-02
Multinomial coefficient (arrangements of repeated items like MISSISSIPPI) and multinomial probability for given odds.
Paid endpoints
| Method | Endpoint | Price | Networks |
|---|---|---|---|
| GET | probability-calc.x402tookit.com/bayes Bayes' theorem: posterior probability from a prior, sensitivity and false-positive rate, with natural frequencies and odds form. | $0.02 | Polygon, Arbitrum, Base, Solana |
| GET | probability-calc.x402tookit.com/birthday-problem Birthday problem: chance two people in a group share a birthday, chance someone shares yours, group size for 50 or 99 percent. | $0.02 | Polygon, Arbitrum, Base, Solana |
| GET | probability-calc.x402tookit.com/card-odds Card odds: 5-card and 7-card poker hand probabilities, chance of hitting your outs by the river, blackjack natural odds. | $0.02 | Polygon, Arbitrum, Base, Solana |
| GET | probability-calc.x402tookit.com/expected-value Expected value, variance, standard deviation and chance of profit for a list of payoffs with probabilities or weights. | $0.02 | Polygon, Arbitrum, Base, Solana |
| GET | probability-calc.x402tookit.com/multinomial Multinomial coefficient (arrangements of repeated items like MISSISSIPPI) and multinomial probability for given odds. | $0.02 | Polygon, Arbitrum, Base, Solana |
Latest checks
| When | Endpoint | HTTP | ms | Result |
|---|---|---|---|---|
| Not checked yet. | ||||
Income on Base (7 days)
This provider's payout address is shared by several providers, so its income is not shown as its own.
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<a href="https://logicnodes.io/observatory/p/probability-calc.x402tookit.com"><img src="https://logicnodes.io/observatory/badge/probability-calc.x402tookit.com.svg" alt="x402 status"></a>
Claim it for free with
x402_provider_claim (sign with your payout address), and get an alert within minutes when it stops answering with x402_monitor_create ($5 for 30 days). Both work over MCP (https://logicnodes.io/mcp/v2) or POST https://logicnodes.io/v1/tools/<tool>.Income is all USDC received by the provider's payout address on Base, whatever the source. Score: 0-100: 50 x share of checks in the last 72 h that returned valid x402 payment terms + 30 x min(1, log10(1 + USDC received in 7 days) / 4) + 20 x min(1, log10(1 + distinct payers in 7 days) / 3). A provider never checked scores on income only; income is all USDC received by its payout address on Base, whatever the source. JSON: /v1/observatory/providers/probability-calc.x402tookit.com