68trust / 100

Calc Grace

by magent in Other

x402 APIFailing, checked 4 h ago

Granger 2003 in-hospital GRACE 1.0: integer nomogram points from age, heart rate, systolic BP, creatinine (mg/dL or µmol/L), Killip class 1-4, cardiac arrest, ST-segment deviation, and elevated initial enzymes. Total 1-372. In-hospital mortality percent is that paper's printed score readout. Not GRACE 2.0, not Fox 2006 6-month, not ESC 108/140 cutoffs. Not a medical device and not a cath-lab order.

POST

https://api.magentlab.com/api/calc/grace

Price: $0.007; per call in USDC
Uptime: 94.1%; last 30 days
Response time: 170 ms; 500 ms slowest 5%
Last check: Failed; 4 h ago, next any minute now

Run a free test call How to call it

Reliability

All checks passedSome failedAll failedNot checked

Latest check failed 4 h ago: Timed out

Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://api.magentlab.com/api/calc/grace

Each call costs $0.007 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://api.magentlab.com/api/calc/grace
content-type: application/json

{
  "items": [
    {
      "age": 65,
      "cardiac_arrest": false,
      "creatinine_mg_dl": 1,
      "creatinine_umol_l": 88.42,
      "elevated_enzymes": false,
      "heart_rate_bpm": 80,
      "killip_class": 1,
      "sbp_mm_hg": 130,
      "st_deviation": false
    },
    {
      "age": 65,
      "cardiac_arrest": false,
      "creatinine_mg_dl": 1,
      "creatinine_umol_l": 88.42,
      "elevated_enzymes": false,
      "heart_rate_bpm": 80,
      "killip_class": 1,
      "sbp_mm_hg": 130,
      "st_deviation": false
    }
  ]
}

Parameters

Parameter	Type	Required	Description
`items`	array of object	Yes

Example response

The provider's example. We can't check it without paying.

Example response, 148 lines

{
  "count": 2,
  "items": [
    {
      "age_years": 65,
      "cardiac_arrest": false,
      "citation": {
        "authors": "Granger CB, Goldberg RJ, Dabbous O, Pieper KS, Eagle KA, Cannon CP, Van De Werf F, Avezum A, Goodman SG, Flather MD, Fox KA; Global Registry of Acute Coronary Events Investigators",
        "doi": "10.1001/archinte.163.19.2345",
        "id": "granger-2003-grace",
        "pmid": "14581255",
        "source": "Arch Intern Med. 2003;163(19):2345-2353",
        "title": "Predictors of hospital mortality in the global registry of acute coronary events"
      },
      "components": [
        {
          "factor": "age",
          "points": 58,
          "present": true,
          "value": 65
        },
        {
          "factor": "heart_rate_bpm",
          "points": 9,
          "present": true,
          "value": 80
        },
        {
          "factor": "sbp_mm_hg",
          "points": 34,
          "present": true,
          "value": 130
        },
        {
          "factor": "creatinine_mg_dl",
          "points": 7,
          "present": true,
          "value": 1
        },
        {
          "factor": "killip_class",
          "points": 0,
          "present": false,
          "value": 1
        },
        {
          "factor": "cardiac_arrest",
          "points": 0,
          "present": false
        },
        {
          "factor": "st_deviation",
          "points": 0,
          "present": false
        },
        {
          "factor": "elevated_enzymes",
          "points": 0,
          "present": false
        }
      ],
      "creatinine_mg_dl": 1,
      "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.",
      "elevated_enzymes": false,
      "formula": "grace",
      "formula_expression": "GRACE = age_points(<30:0, 30-39:8, 40-49:25, 50-59:41, 60-69:58, 70-79:75, 80-89:91, >=90:100) + heart_rate_points(<50:0, 50-69:3, 70-89:9, 90-109:15, 110-149:24, 150-199:38, >=200:46) + sbp_points(<80:58, 80-99:53, 100-119:43, 120-139:34, 140-159:24, 160-199:10, >=200:0) + creatinine_mg_dl_points(0-0.39:1, 0.4-0.79:4, 0.8-1.19:7, 1.2-1.59:10, 1.6-1.99:13, 2.0-3.99:21, >=4:28) + killip(1:0, 2:20, 3:39, 4:59) + 39 if cardiac_arrest + 28 if st_deviation + 14 if elevated_enzymes; Granger 2003 in-hospital GRACE 1.0 nomogram; max 372; in_hospital_mortality_percent is that paper's printed score readout (score<=60 → 0.2; then the labeled 70-240 percents at or below the total; score>=250 → 52); not ESC 108/140 cutoffs, not GRACE 2.0, not Fox 2006 6-month",
      "heart_rate_bpm": 80,
      "in_hospital_mortality_percent": 0.8,
      "killip_class": 1,
      "max_score": 372,
      "sbp_mm_hg": 130,
      "score": 108,
      "st_deviation": false
    },
    {
      "age_years": 65,
      "cardiac_arrest": false,
      "citation": {
        "authors": "Granger CB, Goldberg RJ, Dabbous O, Pieper KS, Eagle KA, Cannon CP, Van De Werf F, Avezum A, Goodman SG, Flather MD, Fox KA; Global Registry of Acute Coronary Events Investigators",
        "doi": "10.1001/archinte.163.19.2345",
        "id": "granger-2003-grace",
        "pmid": "14581255",
        "source": "Arch Intern Med. 2003;163(19):2345-2353",
        "title": "Predictors of hospital mortality in the global registry of acute coronary events"
      },
      "components": [
        {
          "factor": "age",
          "points": 58,
          "present": true,
          "value": 65
        },
        {
          "factor": "heart_rate_bpm",
          "points": 9,
          "present": true,
          "value": 80
        },
        {
          "factor": "sbp_mm_hg",
          "points": 34,
          "present": true,
          "value": 130
        },
        {
          "factor": "creatinine_mg_dl",
          "points": 7,
          "present": true,
          "value": 1
        },
        {
          "factor": "killip_class",
          "points": 0,
          "present": false,
          "value": 1
        },
        {
          "factor": "cardiac_arrest",
          "points": 0,
          "present": false
        },
        {
          "factor": "st_deviation",
          "points": 0,
          "present": false
        },
        {
          "factor": "elevated_enzymes",
          "points": 0,
          "present": false
        }
      ],
      "creatinine_mg_dl": 1,
      "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.",
      "elevated_enzymes": false,
      "formula": "grace",
      "formula_expression": "GRACE = age_points(<30:0, 30-39:8, 40-49:25, 50-59:41, 60-69:58, 70-79:75, 80-89:91, >=90:100) + heart_rate_points(<50:0, 50-69:3, 70-89:9, 90-109:15, 110-149:24, 150-199:38, >=200:46) + sbp_points(<80:58, 80-99:53, 100-119:43, 120-139:34, 140-159:24, 160-199:10, >=200:0) + creatinine_mg_dl_points(0-0.39:1, 0.4-0.79:4, 0.8-1.19:7, 1.2-1.59:10, 1.6-1.99:13, 2.0-3.99:21, >=4:28) + killip(1:0, 2:20, 3:39, 4:59) + 39 if cardiac_arrest + 28 if st_deviation + 14 if elevated_enzymes; Granger 2003 in-hospital GRACE 1.0 nomogram; max 372; in_hospital_mortality_percent is that paper's printed score readout (score<=60 → 0.2; then the labeled 70-240 percents at or below the total; score>=250 → 52); not ESC 108/140 cutoffs, not GRACE 2.0, not Fox 2006 6-month",
      "heart_rate_bpm": 80,
      "in_hospital_mortality_percent": 0.8,
      "killip_class": 1,
      "max_score": 372,
      "sbp_mm_hg": 130,
      "score": 108,
      "st_deviation": false
    }
  ],
  "path": "/api/calc/grace"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.007.

curl: see the payment challenge

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.magentlab.com/api/calc/grace' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"age":65,"cardiac_arrest":false,"creatinine_mg_dl":1,"creatinine_umol_l":88.42,"elevated_enzymes":false,"heart_rate_bpm":80,"killip_class":1,"sbp_mm_hg":130,"st_deviation":false},{"age":65,"cardiac_arrest":false,"creatinine_mg_dl":1,"creatinine_umol_l":88.42,"elevated_enzymes":false,"heart_rate_bpm":80,"killip_class":1,"sbp_mm_hg":130,"st_deviation":false}]}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://api.magentlab.com/api/calc/grace' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"age":65,"cardiac_arrest":false,"creatinine_mg_dl":1,"creatinine_umol_l":88.42,"elevated_enzymes":false,"heart_rate_bpm":80,"killip_class":1,"sbp_mm_hg":130,"st_deviation":false},{"age":65,"cardiac_arrest":false,"creatinine_mg_dl":1,"creatinine_umol_l":88.42,"elevated_enzymes":false,"heart_rate_bpm":80,"killip_class":1,"sbp_mm_hg":130,"st_deviation":false}]}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

JavaScript: pay and call

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.007 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.007" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.007 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.magentlab.com%2Fapi%2Fcalc%2Fgrace&method=POST
const res = await pay("https://api.magentlab.com/api/calc/grace", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "age": 65,
        "cardiac_arrest": false,
        "creatinine_mg_dl": 1,
        "creatinine_umol_l": 88.42,
        "elevated_enzymes": false,
        "heart_rate_bpm": 80,
        "killip_class": 1,
        "sbp_mm_hg": 130,
        "st_deviation": false
      },
      {
        "age": 65,
        "cardiac_arrest": false,
        "creatinine_mg_dl": 1,
        "creatinine_umol_l": 88.42,
        "elevated_enzymes": false,
        "heart_rate_bpm": 80,
        "killip_class": 1,
        "sbp_mm_hg": 130,
        "st_deviation": false
      }
    ]
  }),
});
console.log(res.status, await res.text());

Python: pay and call

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.007 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.007"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://api.magentlab.com/api/calc/grace",
        json={
            "items": [
                {
                    "age": 65,
                    "cardiac_arrest": False,
                    "creatinine_mg_dl": 1,
                    "creatinine_umol_l": 88.42,
                    "elevated_enzymes": False,
                    "heart_rate_bpm": 80,
                    "killip_class": 1,
                    "sbp_mm_hg": 130,
                    "st_deviation": False,
                },
                {
                    "age": 65,
                    "cardiac_arrest": False,
                    "creatinine_mg_dl": 1,
                    "creatinine_umol_l": 88.42,
                    "elevated_enzymes": False,
                    "heart_rate_bpm": 80,
                    "killip_class": 1,
                    "sbp_mm_hg": 130,
                    "st_deviation": False,
                },
            ],
        },
    )
    print(res.status_code, res.text)

Security scan

1 finding

Charges more than its listed price in payment
Listed at $0.005, charges $0.007

Recent checks

When	Result	HTTP	Time	Price
4 h ago	Timed out	-	-	-
9 h ago	Timed out	-	-	-
14 h ago	Passed	402	314 ms	$0.007
19 h ago	Passed	402	189 ms	$0.007
24 h ago	Passed	402	249 ms	$0.007

Show 10 older checks

28 h ago	Passed	402	148 ms	$0.007
33 h ago	Passed	402	153 ms	$0.007
37 h ago	Passed	402	250 ms	$0.007
42 h ago	Passed	402	237 ms	$0.007
45 h ago	Passed	402	144 ms	$0.007
2 days ago	Passed	402	166 ms	$0.007
2 days ago	Passed	402	155 ms	$0.007
2 days ago	Passed	402	170 ms	$0.007
3 days ago	Passed	402	181 ms	$0.007
3 days ago	Passed	402	310 ms	$0.007

History

11 Oct 2026	Price changed from $0.005 to $0.007

Trust score 68/ 100

Availability (30-day uptime)		28 / 30
Valid x402 challenge		15 / 15
Response time		10 / 10
Real paying agents (30 days)		5 / 15
Charges what it lists		0 / 10
Security scan		10 / 10
Verified owner		0 / 10

How the score works

Payment terms

Price: $0.007 per call
Listed at: $0.005 (charges more)
Token: USDC
Networks: Base
Pays to: 0x836B…9Ee2

Real usage

Paying agents: 2 in 30 days
Paid calls: 5 in 30 days
Last paid call: 4 days ago

Source: x402 Bazaar settlement data.

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Trust score

[![ToolVet trust score](https://toolvet.app/badge/calc-grace.svg)](https://toolvet.app/s/calc-grace)