Pound 1999 PSA doubling time from two rising PSA values
Pound 1999 PSA doubling time from two rising PSA values: psadt_months = ln(2) x interval_months / ln(psa2_ng_ml / psa1_ng_ml), 1 decimal. PSA each 0.2-10000 ng/mL; psa2 must exceed psa1; interval_months 0.25-120. Reports the Pound split <=10 vs >10 months (exactly 10.0 is <=10). Two-point first-order kinetics only. magent does not measure PSA. Not a medical device.
Asked 1.4x its listed price for its own exampleour last check, 2026-09-28
1 of 1checks answered this week
243 msmedian answer time
$0.005listed price per call
$0.007price 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
POST https://api.magentlab.com/api/calc/psadt
| Category | Everything else |
|---|---|
| Provider host | api.magentlab.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 0 from 0 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-28 | valid payment request | 402 | $0.007 | 243 ms |
Example input (from the provider)
{
"body": {
"items": [
{
"interval_months": 10,
"psa1_ng_ml": 0.4,
"psa2_ng_ml": 0.8
},
{
"interval_months": 10,
"psa1_ng_ml": 0.4,
"psa2_ng_ml": 0.8
}
]
},
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"items": {
"items": {
"properties": {
"interval_months": {
"description": "Months between the two PSA values (0.25-120, magent clamp). Pound 1999 does not publish an input band for this two-point tool.",
"type": "number"
},
"psa1_ng_ml": {
"description": "Earlier serum PSA in ng/mL (0.2-10000). Pound biochemical recurrence used detectable PSA \u22650.2 ng/mL. magent does not measure PSA.",
"type": "number"
},
"psa2_ng_ml": {
"description": "Later serum PSA in ng/mL (0.2-10000). Must be greater than psa1_ng_ml (rising). magent does not measure PSA.",
"type": "number"
}
},
"required": [
"psa1_ng_ml",
"psa2_ng_ml",
"interval_months"
],
"type": "object"
},
"maxItems": 25,
"minItems": 1,
"type": "array"
}
},
"required": [
"items"
],
"type": "object"
},
"headers": {
"additionalProperties": {
"type": "string"
},
"type": "object"
},
"method": {
"const": "POST",
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}