68trust / 100

Calc Hep

by magent in Other

x402 APIFailing, checked 3 h ago

Cuker 2010 HEP score: eight features with signed weights (range -16 to 19). Magnitude of platelet fall, typical- or rapid-onset timing, nadir, thrombosis (at most one), SQ heparin skin necrosis, IV-bolus systemic reaction, bleeding, and other causes (select all; no other cause +3). Cutoff 2 was 100% sensitive / 60% specific vs the expert panel. Not a HIT diagnosis or 4Ts score. magent does not assay SRA or ELISA.

POST

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

Price: $0.007; per call in USDC
Uptime: 94.1%; last 30 days
Response time: 169 ms; 431 ms slowest 5%
Last check: Failed; 3 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 3 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/hep

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/hep
content-type: application/json

{
  "items": [
    {
      "bleeding": false,
      "chronic_thrombocytopenia": false,
      "cpb_96h": false,
      "intra_arterial_device": false,
      "magnitude": "gt_50",
      "nadir": "gt_20",
      "new_drug_thrombocytopenia": false,
      "no_other_cause": true,
      "overt_dic": false,
      "severe_infection": false,
      "skin_necrosis": false,
      "systemic_reaction": false,
      "thrombosis": "typical_new_ge_4d",
      "timing": "typical_5_10"
    },
    {
      "bleeding": false,
      "chronic_thrombocytopenia": false,
      "cpb_96h": false,
      "intra_arterial_device": false,
      "magnitude": "gt_50",
      "nadir": "gt_20",
      "new_drug_thrombocytopenia": false,
      "no_other_cause": true,
      "overt_dic": false,
      "severe_infection": false,
      "skin_necrosis": false,
      "systemic_reaction": false,
      "thrombosis": "typical_new_ge_4d",
      "timing": "typical_5_10"
    }
  ]
}

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, 192 lines

{
  "count": 2,
  "items": [
    {
      "citation": {
        "authors": "Cuker A, Arepally G, Crowther MA, Rice L, Datko F, Hook K, Propert KJ, Kuter DJ, Ortel TL, Konkle BA, Cines DB",
        "doi": "10.1111/j.1538-7836.2010.04059.x",
        "id": "cuker-2010",
        "pmid": "20854372",
        "source": "J Thromb Haemost. 2010;8(12):2642-2650",
        "title": "The HIT Expert Probability (HEP) Score: a novel pre-test probability model for heparin-induced thrombocytopenia based on broad expert opinion"
      },
      "components": [
        {
          "factor": "magnitude",
          "points": 3,
          "present": true,
          "value": "gt_50"
        },
        {
          "factor": "timing",
          "points": 3,
          "present": true,
          "value": "typical_5_10"
        },
        {
          "factor": "nadir",
          "points": 2,
          "present": true,
          "value": "gt_20"
        },
        {
          "factor": "thrombosis",
          "points": 3,
          "present": true,
          "value": "typical_new_ge_4d"
        },
        {
          "factor": "skin_necrosis",
          "points": 0,
          "present": false
        },
        {
          "factor": "systemic_reaction",
          "points": 0,
          "present": false
        },
        {
          "factor": "bleeding",
          "points": 0,
          "present": false
        },
        {
          "factor": "chronic_thrombocytopenia",
          "points": 0,
          "present": false
        },
        {
          "factor": "new_drug_thrombocytopenia",
          "points": 0,
          "present": false
        },
        {
          "factor": "severe_infection",
          "points": 0,
          "present": false
        },
        {
          "factor": "overt_dic",
          "points": 0,
          "present": false
        },
        {
          "factor": "intra_arterial_device",
          "points": 0,
          "present": false
        },
        {
          "factor": "cpb_96h",
          "points": 0,
          "present": false
        },
        {
          "factor": "no_other_cause",
          "points": 3,
          "present": true
        }
      ],
      "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.",
      "formula": "hep",
      "formula_expression": "HEP = magnitude (lt_30 -1, 30_to_50 1, gt_50 3) + timing (typical_lt_4 -2, typical_day_4 2, typical_5_10 3, typical_11_14 2, typical_gt_14 -1; rapid_lt_48h 2, rapid_gt_48h -1) + nadir (le_20 -2, gt_20 2) + thrombosis select at most one (none 0; typical_new_ge_4d 3, typical_progression 2; rapid_new 3, rapid_progression 2) + skin_necrosis 3 + systemic_reaction 2 + bleeding -1 + other causes select all (chronic_thrombocytopenia -1, new_drug_thrombocytopenia -2, severe_infection -2, overt_dic -2, intra_arterial_device -2, cpb_96h -1, no_other_cause 3 mutually exclusive with other causes); Cuker 2010; range -16 to 19; cutoff 2 was 100% sensitive / 60% specific vs expert panel; cutoff 5 was 86% sensitive / 88% specific",
      "max_score": 19,
      "score": 14,
      "score_ge_2": true,
      "score_ge_5": true
    },
    {
      "citation": {
        "authors": "Cuker A, Arepally G, Crowther MA, Rice L, Datko F, Hook K, Propert KJ, Kuter DJ, Ortel TL, Konkle BA, Cines DB",
        "doi": "10.1111/j.1538-7836.2010.04059.x",
        "id": "cuker-2010",
        "pmid": "20854372",
        "source": "J Thromb Haemost. 2010;8(12):2642-2650",
        "title": "The HIT Expert Probability (HEP) Score: a novel pre-test probability model for heparin-induced thrombocytopenia based on broad expert opinion"
      },
      "components": [
        {
          "factor": "magnitude",
          "points": 3,
          "present": true,
          "value": "gt_50"
        },
        {
          "factor": "timing",
          "points": 3,
          "present": true,
          "value": "typical_5_10"
        },
        {
          "factor": "nadir",
          "points": 2,
          "present": true,
          "value": "gt_20"
        },
        {
          "factor": "thrombosis",
          "points": 3,
          "present": true,
          "value": "typical_new_ge_4d"
        },
        {
          "factor": "skin_necrosis",
          "points": 0,
          "present": false
        },
        {
          "factor": "systemic_reaction",
          "points": 0,
          "present": false
        },
        {
          "factor": "bleeding",
          "points": 0,
          "present": false
        },
        {
          "factor": "chronic_thrombocytopenia",
          "points": 0,
          "present": false
        },
        {
          "factor": "new_drug_thrombocytopenia",
          "points": 0,
          "present": false
        },
        {
          "factor": "severe_infection",
          "points": 0,
          "present": false
        },
        {
          "factor": "overt_dic",
          "points": 0,
          "present": false
        },
        {
          "factor": "intra_arterial_device",
          "points": 0,
          "present": false
        },
        {
          "factor": "cpb_96h",
          "points": 0,
          "present": false
        },
        {
          "factor": "no_other_cause",
          "points": 3,
          "present": true
        }
      ],
      "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.",
      "formula": "hep",
      "formula_expression": "HEP = magnitude (lt_30 -1, 30_to_50 1, gt_50 3) + timing (typical_lt_4 -2, typical_day_4 2, typical_5_10 3, typical_11_14 2, typical_gt_14 -1; rapid_lt_48h 2, rapid_gt_48h -1) + nadir (le_20 -2, gt_20 2) + thrombosis select at most one (none 0; typical_new_ge_4d 3, typical_progression 2; rapid_new 3, rapid_progression 2) + skin_necrosis 3 + systemic_reaction 2 + bleeding -1 + other causes select all (chronic_thrombocytopenia -1, new_drug_thrombocytopenia -2, severe_infection -2, overt_dic -2, intra_arterial_device -2, cpb_96h -1, no_other_cause 3 mutually exclusive with other causes); Cuker 2010; range -16 to 19; cutoff 2 was 100% sensitive / 60% specific vs expert panel; cutoff 5 was 86% sensitive / 88% specific",
      "max_score": 19,
      "score": 14,
      "score_ge_2": true,
      "score_ge_5": true
    }
  ],
  "path": "/api/calc/hep"
}

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/hep' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"bleeding":false,"chronic_thrombocytopenia":false,"cpb_96h":false,"intra_arterial_device":false,"magnitude":"gt_50","nadir":"gt_20","new_drug_thrombocytopenia":false,"no_other_cause":true,"overt_dic":false,"severe_infection":false,"skin_necrosis":false,"systemic_reaction":false,"thrombosis":"typical_new_ge_4d","timing":"typical_5_10"},{"bleeding":false,"chronic_thrombocytopenia":false,"cpb_96h":false,"intra_arterial_device":false,"magnitude":"gt_50","nadir":"gt_20","new_drug_thrombocytopenia":false,"no_other_cause":true,"overt_dic":false,"severe_infection":false,"skin_necrosis":false,"systemic_reaction":false,"thrombosis":"typical_new_ge_4d","timing":"typical_5_10"}]}'

# 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/hep' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"bleeding":false,"chronic_thrombocytopenia":false,"cpb_96h":false,"intra_arterial_device":false,"magnitude":"gt_50","nadir":"gt_20","new_drug_thrombocytopenia":false,"no_other_cause":true,"overt_dic":false,"severe_infection":false,"skin_necrosis":false,"systemic_reaction":false,"thrombosis":"typical_new_ge_4d","timing":"typical_5_10"},{"bleeding":false,"chronic_thrombocytopenia":false,"cpb_96h":false,"intra_arterial_device":false,"magnitude":"gt_50","nadir":"gt_20","new_drug_thrombocytopenia":false,"no_other_cause":true,"overt_dic":false,"severe_infection":false,"skin_necrosis":false,"systemic_reaction":false,"thrombosis":"typical_new_ge_4d","timing":"typical_5_10"}]}' \
  | 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%2Fhep&method=POST
const res = await pay("https://api.magentlab.com/api/calc/hep", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "bleeding": false,
        "chronic_thrombocytopenia": false,
        "cpb_96h": false,
        "intra_arterial_device": false,
        "magnitude": "gt_50",
        "nadir": "gt_20",
        "new_drug_thrombocytopenia": false,
        "no_other_cause": true,
        "overt_dic": false,
        "severe_infection": false,
        "skin_necrosis": false,
        "systemic_reaction": false,
        "thrombosis": "typical_new_ge_4d",
        "timing": "typical_5_10"
      },
      {
        "bleeding": false,
        "chronic_thrombocytopenia": false,
        "cpb_96h": false,
        "intra_arterial_device": false,
        "magnitude": "gt_50",
        "nadir": "gt_20",
        "new_drug_thrombocytopenia": false,
        "no_other_cause": true,
        "overt_dic": false,
        "severe_infection": false,
        "skin_necrosis": false,
        "systemic_reaction": false,
        "thrombosis": "typical_new_ge_4d",
        "timing": "typical_5_10"
      }
    ]
  }),
});
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/hep",
        json={
            "items": [
                {
                    "bleeding": False,
                    "chronic_thrombocytopenia": False,
                    "cpb_96h": False,
                    "intra_arterial_device": False,
                    "magnitude": "gt_50",
                    "nadir": "gt_20",
                    "new_drug_thrombocytopenia": False,
                    "no_other_cause": True,
                    "overt_dic": False,
                    "severe_infection": False,
                    "skin_necrosis": False,
                    "systemic_reaction": False,
                    "thrombosis": "typical_new_ge_4d",
                    "timing": "typical_5_10",
                },
                {
                    "bleeding": False,
                    "chronic_thrombocytopenia": False,
                    "cpb_96h": False,
                    "intra_arterial_device": False,
                    "magnitude": "gt_50",
                    "nadir": "gt_20",
                    "new_drug_thrombocytopenia": False,
                    "no_other_cause": True,
                    "overt_dic": False,
                    "severe_infection": False,
                    "skin_necrosis": False,
                    "systemic_reaction": False,
                    "thrombosis": "typical_new_ge_4d",
                    "timing": "typical_5_10",
                },
            ],
        },
    )
    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
3 h ago	Timed out	-	-	-
8 h ago	Timed out	-	-	-
13 h ago	Passed	402	164 ms	$0.007
18 h ago	Passed	402	141 ms	$0.007
23 h ago	Passed	402	227 ms	$0.007

Show 10 older checks

27 h ago	Passed	402	282 ms	$0.007
32 h ago	Passed	402	164 ms	$0.007
36 h ago	Passed	402	153 ms	$0.007
40 h ago	Passed	402	172 ms	$0.007
44 h ago	Passed	402	176 ms	$0.007
2 days ago	Passed	402	305 ms	$0.007
2 days ago	Passed	402	194 ms	$0.007
2 days ago	Passed	402	165 ms	$0.007
3 days ago	Passed	402	223 ms	$0.007
3 days ago	Passed	402	158 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: 4 in 30 days
Last paid call: 5 days ago

Source: x402 Bazaar settlement data.

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Trust score

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