Radioactive decay
Radioactive decay: remaining fraction after a time, time to reach a fraction (carbon dating), decay constant and mean life.
Answeringour last check, 2026-10-21
1 of 1checks answered this week
385 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://chemistry-calc.x402tookit.com/half-life
| Category | Everything else |
|---|---|
| Provider host | chemistry-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 | $0.02 | 385 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"elapsed": 11460,
"initial": 100,
"isotope": "c-14"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"elapsed": {
"description": "Time elapsed (same unit as the half-life)",
"type": "number"
},
"halfLife": {
"description": "Half-life in the unit you choose (or use isotope)",
"type": "number"
},
"initial": {
"description": "Initial amount, to get the remaining amount",
"type": "number"
},
"isotope": {
"description": "c-14, k-40, u-238, u-235, ra-226, pu-239, cs-137, sr-90, co-60, h-3, i-131 or tc-99m (half-life in years)",
"type": "string"
},
"remainingFraction": {
"description": "Fraction remaining, 0 to 1, to find the elapsed time",
"type": "number"
}
},
"required": [],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"decayConstantPerUnit": {
"type": [
"null",
"number"
]
},
"decayedAmount": {
"type": [
"null",
"number"
]
},
"decayedPercent": {
"type": [
"null",
"number"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"elapsed": {
"type": [
"null",
"number"
]
},
"halfLife": {
"type": [
"null",
"number"
]
},
"halfLivesElapsed": {
"type": [
"null",
"number"
]
},
"isotope": {
"type": [
"null",
"string"
]
},
"meanLife": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"remainingAmount": {
"type": [
"null",
"number"
]
},
"remainingFraction": {
"type": [
"null",
"number"
]
},
"remainingPercent": {
"type": [
"null",
"number"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"unit": {
"type": [
"null",
"string"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}