71trust / 100

Calc Rose

x402 APIPassing, checked 4 h ago

Reed 2010 ROSE (BRACES) for ED syncope: BNP ≥300 pg/mL, heart rate ≤50, fecal occult blood, hemoglobin ≤90 g/L, chest pain associated with syncope, Q wave not in lead III, and room-air SpO2 ≤94%. Each present criterion is 1 point (score 0-7). High-risk if any item is present. Caller assigns labs, vitals, FOB, chest pain, and the Q-wave flag. Not a medical device or disposition protocol; magent does not measure BNP, hemoglobin, or SpO2, and does not read an ECG.

POST

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

Price: $0.007; per call in USDC
Uptime: 100%; last 30 days
Response time: 205 ms; 531 ms slowest 5%
Last check: Passed; 4 h ago, next any minute now

Run a free test call How to call it

Reliability

All checks passedSome failedAll failedNot checked

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

How to call it

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

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/rose
content-type: application/json

{
  "items": [
    {
      "bnp_pg_ml": 50,
      "chest_pain": false,
      "fecal_occult_blood": false,
      "heart_rate_bpm": 70,
      "hemoglobin_g_l": 130,
      "q_wave_not_lead_iii": false,
      "spo2_percent": 98
    },
    {
      "bnp_pg_ml": 50,
      "chest_pain": false,
      "fecal_occult_blood": false,
      "heart_rate_bpm": 70,
      "hemoglobin_g_l": 130,
      "q_wave_not_lead_iii": false,
      "spo2_percent": 98
    }
  ]
}

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, 128 lines

{
  "count": 2,
  "items": [
    {
      "bnp_pg_ml": 50,
      "citation": {
        "authors": "Reed MJ, Newby DE, Coull AJ, Prescott RJ, Jacques KG, Gray AJ",
        "doi": "10.1016/j.jacc.2009.09.049",
        "id": "reed-2010",
        "pmid": "20170806",
        "source": "J Am Coll Cardiol. 2010;55(8):713-721",
        "title": "The ROSE (Risk Stratification of Syncope in the Emergency Department) Study"
      },
      "components": [
        {
          "factor": "bnp_ge_300",
          "points": 0,
          "present": false,
          "value": 50
        },
        {
          "factor": "heart_rate_le_50",
          "points": 0,
          "present": false,
          "value": 70
        },
        {
          "factor": "fecal_occult_blood",
          "points": 0,
          "present": false
        },
        {
          "factor": "hemoglobin_le_90",
          "points": 0,
          "present": false,
          "value": 130
        },
        {
          "factor": "chest_pain",
          "points": 0,
          "present": false
        },
        {
          "factor": "q_wave_not_lead_iii",
          "points": 0,
          "present": false
        },
        {
          "factor": "spo2_le_94",
          "points": 0,
          "present": false,
          "value": 98
        }
      ],
      "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": "rose",
      "formula_expression": "ROSE = bnp_ge_300 + heart_rate_le_50 + fecal_occult_blood + hemoglobin_le_90 + chest_pain + q_wave_not_lead_iii + spo2_le_94; each 1 if present; rose_high_risk iff score >= 1; max 7 (Reed 2010 BRACES)",
      "heart_rate_bpm": 70,
      "hemoglobin_g_l": 130,
      "max_score": 7,
      "rose_high_risk": false,
      "score": 0,
      "spo2_percent": 98
    },
    {
      "bnp_pg_ml": 50,
      "citation": {
        "authors": "Reed MJ, Newby DE, Coull AJ, Prescott RJ, Jacques KG, Gray AJ",
        "doi": "10.1016/j.jacc.2009.09.049",
        "id": "reed-2010",
        "pmid": "20170806",
        "source": "J Am Coll Cardiol. 2010;55(8):713-721",
        "title": "The ROSE (Risk Stratification of Syncope in the Emergency Department) Study"
      },
      "components": [
        {
          "factor": "bnp_ge_300",
          "points": 0,
          "present": false,
          "value": 50
        },
        {
          "factor": "heart_rate_le_50",
          "points": 0,
          "present": false,
          "value": 70
        },
        {
          "factor": "fecal_occult_blood",
          "points": 0,
          "present": false
        },
        {
          "factor": "hemoglobin_le_90",
          "points": 0,
          "present": false,
          "value": 130
        },
        {
          "factor": "chest_pain",
          "points": 0,
          "present": false
        },
        {
          "factor": "q_wave_not_lead_iii",
          "points": 0,
          "present": false
        },
        {
          "factor": "spo2_le_94",
          "points": 0,
          "present": false,
          "value": 98
        }
      ],
      "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": "rose",
      "formula_expression": "ROSE = bnp_ge_300 + heart_rate_le_50 + fecal_occult_blood + hemoglobin_le_90 + chest_pain + q_wave_not_lead_iii + spo2_le_94; each 1 if present; rose_high_risk iff score >= 1; max 7 (Reed 2010 BRACES)",
      "heart_rate_bpm": 70,
      "hemoglobin_g_l": 130,
      "max_score": 7,
      "rose_high_risk": false,
      "score": 0,
      "spo2_percent": 98
    }
  ],
  "path": "/api/calc/rose"
}

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/rose' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"bnp_pg_ml":50,"chest_pain":false,"fecal_occult_blood":false,"heart_rate_bpm":70,"hemoglobin_g_l":130,"q_wave_not_lead_iii":false,"spo2_percent":98},{"bnp_pg_ml":50,"chest_pain":false,"fecal_occult_blood":false,"heart_rate_bpm":70,"hemoglobin_g_l":130,"q_wave_not_lead_iii":false,"spo2_percent":98}]}'

# 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/rose' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"bnp_pg_ml":50,"chest_pain":false,"fecal_occult_blood":false,"heart_rate_bpm":70,"hemoglobin_g_l":130,"q_wave_not_lead_iii":false,"spo2_percent":98},{"bnp_pg_ml":50,"chest_pain":false,"fecal_occult_blood":false,"heart_rate_bpm":70,"hemoglobin_g_l":130,"q_wave_not_lead_iii":false,"spo2_percent":98}]}' \
  | 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%2Frose&method=POST
const res = await pay("https://api.magentlab.com/api/calc/rose", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "bnp_pg_ml": 50,
        "chest_pain": false,
        "fecal_occult_blood": false,
        "heart_rate_bpm": 70,
        "hemoglobin_g_l": 130,
        "q_wave_not_lead_iii": false,
        "spo2_percent": 98
      },
      {
        "bnp_pg_ml": 50,
        "chest_pain": false,
        "fecal_occult_blood": false,
        "heart_rate_bpm": 70,
        "hemoglobin_g_l": 130,
        "q_wave_not_lead_iii": false,
        "spo2_percent": 98
      }
    ]
  }),
});
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/rose",
        json={
            "items": [
                {
                    "bnp_pg_ml": 50,
                    "chest_pain": False,
                    "fecal_occult_blood": False,
                    "heart_rate_bpm": 70,
                    "hemoglobin_g_l": 130,
                    "q_wave_not_lead_iii": False,
                    "spo2_percent": 98,
                },
                {
                    "bnp_pg_ml": 50,
                    "chest_pain": False,
                    "fecal_occult_blood": False,
                    "heart_rate_bpm": 70,
                    "hemoglobin_g_l": 130,
                    "q_wave_not_lead_iii": False,
                    "spo2_percent": 98,
                },
            ],
        },
    )
    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	Passed	402	241 ms	$0.007
8 h ago	Passed	402	155 ms	$0.007
13 h ago	Passed	402	146 ms	$0.007
17 h ago	Passed	402	168 ms	$0.007
22 h ago	Passed	402	153 ms	$0.007

Show 10 older checks

26 h ago	Passed	402	3.3 s	$0.007
30 h ago	Passed	402	369 ms	$0.007
34 h ago	Passed	402	286 ms	$0.007
39 h ago	Passed	402	147 ms	$0.007
43 h ago	Passed	402	154 ms	$0.007
47 h ago	Passed	402	369 ms	$0.007
2 days ago	Passed	402	225 ms	$0.007
2 days ago	Passed	402	322 ms	$0.007
3 days ago	Passed	402	164 ms	$0.007
3 days ago	Passed	402	262 ms	$0.007

History

11 Oct 2026	Price changed from $0.005 to $0.007

Trust score 71/ 100

Availability (30-day uptime)		30 / 30
Valid x402 challenge		15 / 15
Response time		10 / 10
Real paying agents (30 days)		6 / 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: 3 in 30 days
Paid calls: 6 in 30 days
Last paid call: 3 days ago

Source: x402 Bazaar settlement data.

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Trust score

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