Health

eGFR Calculator (CKD-EPI 2021 Race-Free)

Estimate glomerular filtration rate (eGFR) with the CKD-EPI 2021 race-free creatinine equation: eGFR = 142 × min(SCr/κ, 1)^α × max(SCr/κ, 1)^(−1.200) × 0.9938^Age × 1.012 if female, where κ = 0.7 (female) / 0.9 (male) and α = −0.241 (female) / −0.302 (male). This 2021 update (Inker et al., NEJM 2021) removed the race multiplier from the 2009 equation and changed the leading coefficient from 141 to 142. Returns a BSA-INDEXED eGFR for CKD staging (G1–G5); for drug dosing use un-indexed CrCl (Cockcroft-Gault). Valid for stable adults, not AKI/pregnancy/amputees/extremes. Not medical advice.

json· JSON resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

curl -X POST 'https://api.elysiatools.com/en/api/tools/egfr-ckd-epi' \
  -H 'Content-Type: application/json' \
  -d '{"age":60,"sex":"male","serumCreatinine":1.4,"decimalPlaces":4}'

API reference

Send a POST request with your inputs as JSON. File parameters require a separate upload first.

Endpoint

HTTP

POST https://api.elysiatools.com/en/api/tools/egfr-ckd-epi

Parameters

Name	Type	Required	Description
age	number	Yes	Patient age in years. Must be ≥18 and ≤120.
sex	select	No	—
serumCreatinine	number	Yes	Serum creatinine in mg/dL. Must be positive.
decimalPlaces	number	No	—

Response format

JSON result

JSON

{
  "key": {...},
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}

MCP integration

Add this tool to your Model Context Protocol server so AI agents can list and call it.

Server configuration

Add this block to your MCP client configuration:

mcp.json

{
  "mcpServers": {
    "elysiatools-egfr-ckd-epi": {
      "name": "egfr-ckd-epi",
      "description": "Estimate glomerular filtration rate (eGFR) with the CKD-EPI 2021 race-free creatinine equation: eGFR = 142 × min(SCr/κ, 1)^α × max(SCr/κ, 1)^(−1.200) × 0.9938^Age × 1.012 if female, where κ = 0.7 (female) / 0.9 (male) and α = −0.241 (female) / −0.302 (male). This 2021 update (Inker et al., NEJM 2021) removed the race multiplier from the 2009 equation and changed the leading coefficient from 141 to 142. Returns a BSA-INDEXED eGFR for CKD staging (G1–G5); for drug dosing use un-indexed CrCl (Cockcroft-Gault). Valid for stable adults, not AKI/pregnancy/amputees/extremes. Not medical advice.",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=egfr-ckd-epi",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

List available tools

After connecting to the SSE endpoint, list the exposed tools:

tools/list

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list"
}

Call this tool

Invoke the tool by its id, passing arguments built from its parameters:

tools/call

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "egfr-ckd-epi",
    "arguments": {
  "age": 60,
  "sex": "male",
  "serumCreatinine": 1.4,
  "decimalPlaces": 4
}
  }
}

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eGFR Calculator (CKD-EPI 2021 Race-Free)

json· JSON resultOpen tool

Name

Type

Required

Description

age

number

Yes

Patient age in years. Must be ≥18 and ≤120.

sex

select

—

serumCreatinine

number

Yes

Serum creatinine in mg/dL. Must be positive.

decimalPlaces

number

—

{ "mcpServers": { "elysiatools-egfr-ckd-epi": { "name": "egfr-ckd-epi", "description": "Estimate glomerular filtration rate (eGFR) with the CKD-EPI 2021 race-free creatinine equation: eGFR = 142 × min(SCr/κ, 1)^α × max(SCr/κ, 1)^(−1.200) × 0.9938^Age × 1.012 if female, where κ = 0.7 (female) / 0.9 (male) and α = −0.241 (female) / −0.302 (male). This 2021 update (Inker et al., NEJM 2021) removed the race multiplier from the 2009 equation and changed the leading coefficient from 141 to 142. Returns a BSA-INDEXED eGFR for CKD staging (G1–G5); for drug dosing use un-indexed CrCl (Cockcroft-Gault). Valid for stable adults, not AKI/pregnancy/amputees/extremes. Not medical advice.", "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=egfr-ckd-epi", "command": "", "args": [], "env": {}, "isActive": true, "type": "sse" } } }

{ "jsonrpc": "2.0", "id": 2, "method": "tools/call", "params": { "name": "egfr-ckd-epi", "arguments": { "age": 60, "sex": "male", "serumCreatinine": 1.4, "decimalPlaces": 4 } } }