Exact pmf, cumulative and tail tables for geometric, negative binomial, hypergeo
Exact pmf, cumulative and tail tables for geometric, negative binomial, hypergeometric, binomial and Poisson.
Answeringour last check, 2026-10-21
1 of 1checks answered this week
1149 msmedian answer time
$0.02listed price per call
$0.02price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://probability-calc.x402tookit.com/distribution-table
| Category | Everything else |
|---|---|
| Provider host | probability-calc.x402tookit.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-21 | valid payment request | 402 | $0.02 | 1149 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"K": 13,
"N": 52,
"dist": "hypergeometric",
"n": 5
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"K": {
"description": "Successes in the population (hypergeometric)",
"type": "integer"
},
"N": {
"description": "Population size (hypergeometric), up to 1e6",
"type": "integer"
},
"dist": {
"description": "One of geometric, negative-binomial, hypergeometric, binomial, poisson",
"type": "string"
},
"k": {
"description": "Optional point of interest: adds pmf, P(X<=k) and P(X>=k) for this k",
"type": "integer"
},
"lambda": {
"description": "Mean rate (Poisson), 0 to 1000",
"type": "number"
},
"n": {
"description": "Trials (binomial) or draws (hypergeometric)",
"type": "integer"
},
"p": {
"description": "Success probability (geometric, negative-binomial, binomial)",
"type": "number"
},
"r": {
"description": "Successes wanted (negative-binomial), 1 to 1000",
"type": "integer"
}
},
"required": [
"dist"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"distribution": {
"type": [
"null",
"string"
]
},
"mean": {
"type": [
"null",
"number"
]
},
"mode": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"parameters": {
"properties": {
"K": {
"type": [
"null",
"number"
]
},
"N": {
"type": [
"null",
"number"
]
},
"n": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"standardDeviation": {
"type": [
"null",
"number"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"support": {
"type": [
"null",
"string"
]
},
"table": {
"items": {
"properties": {
"cumulative": {
"type": [
"null",
"number"
]
},
"k": {
"type": [
"null",
"number"
]
},
"probability": {
"type": [
"null",
"number"
]
},
"upperTail": {
"type": [
"null",
"number"
]
}
},
"type": "object"
},
"type": [
"array",
"null"
]
},
"tableComplete": {
"type": [
"boolean",
"null"
]
},
"variance": {
"type": [
"null",
"number"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}