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UKELD Calculator (Barber 2011)
x402
UKELD Calculator (Barber 2011) is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Calculates the UK End-Stage Liver Disease (UKELD) score from INR, creatinine, bilirubin, and sodium in native SI units, and returns whether the patient meets the UK transplant listing threshold.
Price / call$0.005
Success—
StatusUnknown
How this service works
Barber 2011 United Kingdom end-stage liver disease (UKELD) from INR, creatinine, bilirubin, and sodium in native SI units. UKELD = 5.395*ln(INR) + 1.485*ln(creatinine_umol_l) + 3.13*ln(bilirubin_umol_l) - 81.565*ln(sodium_mmol_l) + 435, nearest integer. below_listing if <49; listing_threshold if ≥49 (UK elective-list 9% 1-year mortality cut). Not a transplant listing or allocation order. Not MELD or MELD-Na.
Output
Returns an integer UKELD score computed using the Barber 2011 formula (5.395×ln(INR) + 1.485×ln(creatinine_µmol/L) + 3.13×ln(bilirubin_µmol/L) − 81.565×ln(sodium_mmol/L) + 435, rounded to nearest integer) and a classification string: 'below_listing' if score <49, or 'listing_threshold' if score ≥49, corresponding to the UK elective transplant listing 9% one-year mortality cut-off.
Example use cases
Pre-transplant assessment triage
“My patient has INR 1.9, creatinine 175 µmol/L, bilirubin 112 µmol/L, and sodium 128 mmol/L — what's their UKELD score and do they hit the ≥49 UK listing threshold?”
Hepatology clinic chart automation
“Automatically compute the UKELD score for today's clinic patient whose labs came back as INR 2.6, creatinine 260 µmol/L, bilirubin 145 µmol/L, and serum sodium 131 mmol/L.”
Liver disease severity trend tracking
“Last month this patient's UKELD was 46; their new labs are INR 2.8, creatinine 310 µmol/L, bilirubin 200 µmol/L, sodium 127 mmol/L — recalculate and tell me if they've crossed the listing threshold.”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/ukeldWhen to prefer
Use this endpoint when you need the UKELD score specifically — the UK-specific liver disease severity score used for elective transplant listing decisions in the United Kingdom — as distinct from MELD or MELD-Na which are used in the US. Prefer this when lab values are available in native SI units (µmol/L, mmol/L) to avoid manual unit conversion, or supply mg/dL values directly since the API converts them automatically. Not appropriate for US-based MELD/UNOS allocation decisions.
Side effects
- Missing required parameters (INR or sodium_mmol_l not provided) returns a 400 error
- Both bilirubin_umol_l and bilirubin_mg_dl provided simultaneously — only one should be supplied
- Both creatinine_umol_l and creatinine_mg_dl provided simultaneously — only one should be supplied
- Values outside expected physiological ranges (e.g. sodium outside 110–160 mmol/L) may be rejected or produce clinically implausible scores
- Payment not included or insufficient USDC balance returns a 402 Payment Required error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"path": "/api/calc/ukeld",
"count": 2,
"items": [
{
"inr": 1.2,
"ukeld": 54,
"formula": "ukeld",
"citation": {
"id": "barber-2011",
"doi": "10.1097/TP.0b013e318225db4d",
"pmid": "21775931",
"title": "Elective liver transplant list mortality: development of a United Kingdom end-stage liver disease score",
"source": "Transplantation. 2011;92(4):469-476",
"authors": "Barber K, Madden S, Allen J, Collett D, Neuberger J, Gimson A; United Kingdom Liver Transplant Selection and Allocation Working Party"
},
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"ukeld_band": "listing_threshold",
"sodium_mmol_l": 135,
"bilirubin_umol_l": 40,
"creatinine_umol_l": 90,
"formula_expression": "UKELD = 5.395 * ln(INR) + 1.485 * ln(creatinine_umol_l) + 3.13 * ln(bilirubin_umol_l) - 81.565 * ln(sodium_mmol_l) + 435"
},
{
"inr": 1.2,
"ukeld": 54,
"formula": "ukeld",
"citation": {
"id": "barber-2011",
"doi": "10.1097/TP.0b013e318225db4d",
"pmid": "21775931",
"title": "Elective liver transplant list mortality: development of a United Kingdom end-stage liver disease score",
"source": "Transplantation. 2011;92(4):469-476",
"authors": "Barber K, Madden S, Allen J, Collett D, Neuberger J, Gimson A; United Kingdom Liver Transplant Selection and Allocation Working Party"
},
"disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
"ukeld_band": "listing_threshold",
"sodium_mmol_l": 135,
"bilirubin_umol_l": 40,
"creatinine_umol_l": 90,
"formula_expression": "UKELD = 5.395 * ln(INR) + 1.485 * ln(creatinine_umol_l) + 3.13 * ln(bilirubin_umol_l) - 81.565 * ln(sodium_mmol_l) + 435"
}
]
}
}Tags
x402
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