Statistics Calculator
Statistics calculator for a numeric array in one call: count, sum, mean, median, mode, variance and standard deviation honouring ddof (default 1, the sample form; 0 gives the population form) plus always-population *_population fields, min, max, range, the quartiles and interquartile range, skewness, kurtosis, and any requested percentiles. Percentiles use a named interpolation method so the result is reproducible rather than implementation-defined.
Offering
- Provider
- api.duoleads.com
- Method
- GET
- Offering type
- Api Endpoint
- Transport type
- http
- Category
- Data
- Delivery
- Not provided
- Pricing model
- Not provided
- x402 version
- 2
Endpoint context
- URL
https://api.duoleads.com/v1/num/stats- MIME type
- application/json
- First seen
- 2026-10-16T01:50:38.788Z
- Last seen
- Tags
- statistics, mean, median, numbers, num
Payment pricing
x402 payment terms are the authoritative price for calling this endpoint.
- Payment option 1
- 0.05 USDC
Atomic price: 50000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Raw x402 terms
[
{
"scheme": "exact",
"network": "eip155:8453",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "50000",
"payTo": "0xCD673f7e1daD254347AEab6be0DEFe8b9C6b3A39"
}
]Observed health
- Status
- Healthy
- Latest latency
- 48 ms
- Average latency
- 659 ms
- HTTP status
- 402
- Last checked
- Reachability
- 100% over 13 checks
Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.
Input schema
{
"type": "object",
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"type": "string",
"enum": [
"GET"
]
},
"queryParams": {
"type": "object",
"properties": {
"values": {
"type": "string",
"description": "Comma-separated finite numbers, at most 500 values.",
"maxLength": 4096
},
"percentiles": {
"type": "string",
"description": "Comma-separated percentiles 0-100, at most 20. Default 25,50,75.",
"maxLength": 256,
"default": "25,50,75"
},
"method": {
"type": "string",
"description": "Percentile interpolation (NumPy/R names): linear (default), nearest, lower, higher, midpoint.",
"enum": [
"linear",
"nearest",
"lower",
"higher",
"midpoint"
],
"maxLength": 64,
"default": "linear"
},
"ddof": {
"type": "string",
"description": "Delta degrees of freedom for variance/stdev: 1 (default, sample, n-1) or 0 (population, n). The *_population fields are always population.",
"pattern": "^[+-]?\\d+$",
"maxLength": 64,
"default": "1"
}
},
"required": [
"values"
]
}
},
"required": [
"type",
"method"
],
"additionalProperties": false
}Output schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"ddof": {
"default": "1",
"description": "Delta degrees of freedom for variance/stdev: 1 (default, sample, n-1) or 0 (population, n). The *_population fields are always population.",
"maxLength": 64,
"pattern": "^[+-]?\\d+$",
"type": "string"
},
"method": {
"default": "linear",
"description": "Percentile interpolation (NumPy/R names): linear (default), nearest, lower, higher, midpoint.",
"enum": [
"linear",
"nearest",
"lower",
"higher",
"midpoint"
],
"maxLength": 64,
"type": "string"
},
"percentiles": {
"default": "25,50,75",
"description": "Comma-separated percentiles 0-100, at most 20. Default 25,50,75.",
"maxLength": 256,
"type": "string"
},
"values": {
"description": "Comma-separated finite numbers, at most 500 values.",
"maxLength": 4096,
"type": "string"
}
},
"required": [
"values"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"data": {
"properties": {
"ddof": {
"type": "integer"
},
"iqr": {
"type": [
"number",
"null"
]
},
"kurtosis_excess": {
"type": [
"number",
"null"
]
},
"max": {
"type": "number"
},
"mean": {
"type": [
"number",
"null"
]
},
"median": {
"type": [
"number",
"null"
]
},
"method": {
"type": "string"
},
"min": {
"type": "number"
},
"mode": {
"items": {
"type": "number"
},
"type": [
"array",
"null"
]
},
"n": {
"type": "integer"
},
"outliers_tukey": {
"items": {
"type": "number"
},
"type": "array"
},
"percentiles": {
"additionalProperties": {
"type": [
"number",
"null"
]
},
"description": "keyed by caller-chosen names",
"type": "object"
},
"q1": {
"type": [
"number",
"null"
]
},
"q3": {
"type": [
"number",
"null"
]
},
"range": {
"type": [
"number",
"null"
]
},
"skewness": {
"type": [
"number",
"null"
]
},
"stdev": {
"type": [
"number",
"null"
]
},
"stdev_population": {
"type": [
"number",
"null"
]
},
"sum": {
"type": [
"number",
"null"
]
},
"variance": {
"type": [
"number",
"null"
]
},
"variance_population": {
"type": [
"number",
"null"
]
}
},
"required": [
"n",
"sum",
"mean",
"median",
"mode",
"ddof",
"variance",
"stdev",
"variance_population",
"stdev_population",
"min",
"max",
"range",
"q1",
"q3",
"iqr",
"skewness",
"kurtosis_excess",
"percentiles",
"method",
"outliers_tukey"
],
"type": "object"
},
"meta": {
"properties": {
"computed_at": {
"description": "RFC 3339 UTC with milliseconds",
"type": "string"
},
"deterministic": {
"type": "boolean"
},
"disclaimer": {
"type": "string"
},
"price_usd": {
"type": "string"
},
"request_id": {
"type": "string"
},
"sources": {
"items": {
"required": [
"id",
"version",
"published"
],
"type": "object"
},
"type": "array"
}
},
"required": [
"request_id",
"computed_at",
"price_usd",
"deterministic",
"disclaimer"
],
"type": "object"
},
"ok": {
"const": true
},
"route": {
"const": "/v1/num/stats"
},
"version": {
"type": "string"
}
},
"required": [
"ok",
"route",
"version",
"data",
"meta"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}