71trust / 100

Calc Save

by magent in Other

x402 APIPassing, checked 3 h ago

Schmidt 2015 SAVE-score from Table 4 integer cells plus constant −6. Age, weight, additive diagnoses, chronic renal failure, acute liver/CNS/renal failure, intubation hours, PIP ≤20, cardiac arrest, diastolic BP ≥40, pulse pressure ≤20, bicarbonate ≤15. Class I–V hospital survival 75/58/42/30/18%. Range −35 to 17. Not a VA-ECMO assignment. Not modified SAVE.

POST

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

Price: $0.007; per call in USDC
Uptime: 100%; last 30 days
Response time: 179 ms; 341 ms slowest 5%
Last check: Passed; 3 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/save

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/save
content-type: application/json

{
  "items": [
    {
      "acute_renal_failure": false,
      "age": 70,
      "bicarbonate_mmol_l": 24,
      "chronic_renal_failure": false,
      "cns_dysfunction": false,
      "congenital_heart_disease": false,
      "diastolic_bp_mm_hg": 35,
      "intubation_hours": 5,
      "liver_failure": false,
      "myocarditis": false,
      "pip_cmh2o": 25,
      "post_heart_or_lung_transplant": false,
      "pre_ecmo_cardiac_arrest": false,
      "pulse_pressure_mm_hg": 40,
      "refractory_vt_vf": false,
      "weight_kg": 95
    },
    {
      "acute_renal_failure": false,
      "age": 70,
      "bicarbonate_mmol_l": 24,
      "chronic_renal_failure": false,
      "cns_dysfunction": false,
      "congenital_heart_disease": false,
      "diastolic_bp_mm_hg": 35,
      "intubation_hours": 5,
      "liver_failure": false,
      "myocarditis": false,
      "pip_cmh2o": 25,
      "post_heart_or_lung_transplant": false,
      "pre_ecmo_cardiac_arrest": false,
      "pulse_pressure_mm_hg": 40,
      "refractory_vt_vf": false,
      "weight_kg": 95
    }
  ]
}

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, 230 lines

{
  "count": 2,
  "items": [
    {
      "citation": {
        "authors": "Schmidt M, Burrell A, Roberts L, et al.",
        "doi": "10.1093/eurheartj/ehv194",
        "id": "schmidt-2015",
        "pmid": "26033984",
        "source": "Eur Heart J. 2015;36(33):2246-2256",
        "title": "Predicting survival after ECMO for refractory cardiogenic shock: the survival after veno-arterial-ECMO (SAVE)-score"
      },
      "components": [
        {
          "factor": "myocarditis",
          "points": 0,
          "present": false
        },
        {
          "factor": "refractory_vt_vf",
          "points": 0,
          "present": false
        },
        {
          "factor": "post_heart_or_lung_transplant",
          "points": 0,
          "present": false
        },
        {
          "factor": "congenital_heart_disease",
          "points": 0,
          "present": false
        },
        {
          "factor": "age",
          "points": 0,
          "present": false,
          "value": 70
        },
        {
          "factor": "weight_kg",
          "points": 0,
          "present": false,
          "value": 95
        },
        {
          "factor": "liver_failure",
          "points": 0,
          "present": false
        },
        {
          "factor": "cns_dysfunction",
          "points": 0,
          "present": false
        },
        {
          "factor": "acute_renal_failure",
          "points": 0,
          "present": false
        },
        {
          "factor": "chronic_renal_failure",
          "points": 0,
          "present": false
        },
        {
          "factor": "intubation_hours",
          "points": 0,
          "present": false,
          "value": 5
        },
        {
          "factor": "pip_cmh2o",
          "points": 0,
          "present": false,
          "value": 25
        },
        {
          "factor": "pre_ecmo_cardiac_arrest",
          "points": 0,
          "present": false
        },
        {
          "factor": "diastolic_bp_mm_hg",
          "points": 0,
          "present": false,
          "value": 35
        },
        {
          "factor": "pulse_pressure_mm_hg",
          "points": 0,
          "present": false,
          "value": 40
        },
        {
          "factor": "bicarbonate_mmol_l",
          "points": 0,
          "present": false,
          "value": 24
        },
        {
          "factor": "constant",
          "points": -6,
          "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": "save",
      "formula_expression": "SAVE = constant(−6) + age(18–38 → 7, 39–52 → 4, 53–62 → 3, ≥63 → 0) + weight_kg(≤65 → 1, 66–89 → 2, ≥90 → 0) + myocarditis(3) + refractory_vt_vf(2) + post_heart_or_lung_transplant(3) + congenital_heart_disease(−3) + liver_failure(−3) + cns_dysfunction(−3) + acute_renal_failure(−3) + chronic_renal_failure(−6) + intubation_hours(≤10 → 0, 11–29 → −2, ≥30 → −4) + pip_cmh2o(≤20 → 3) + pre_ecmo_cardiac_arrest(−2) + diastolic_bp_mm_hg(≥40 → 3) + pulse_pressure_mm_hg(≤20 → −2) + bicarbonate_mmol_l(≤15 → −3); diagnoses and acute organ failures may stack (Table 4 select one or more); other diagnoses 0; range −35 to 17; class I >5 → 75%, II 1–5 → 58%, III −4 to 0 → 42%, IV −9 to −5 → 30%, V ≤−10 → 18%",
      "hospital_survival_percent": 30,
      "max_score": 17,
      "min_score": -35,
      "save_class": "IV",
      "score": -6
    },
    {
      "citation": {
        "authors": "Schmidt M, Burrell A, Roberts L, et al.",
        "doi": "10.1093/eurheartj/ehv194",
        "id": "schmidt-2015",
        "pmid": "26033984",
        "source": "Eur Heart J. 2015;36(33):2246-2256",
        "title": "Predicting survival after ECMO for refractory cardiogenic shock: the survival after veno-arterial-ECMO (SAVE)-score"
      },
      "components": [
        {
          "factor": "myocarditis",
          "points": 0,
          "present": false
        },
        {
          "factor": "refractory_vt_vf",
          "points": 0,
          "present": false
        },
        {
          "factor": "post_heart_or_lung_transplant",
          "points": 0,
          "present": false
        },
        {
          "factor": "congenital_heart_disease",
          "points": 0,
          "present": false
        },
        {
          "factor": "age",
          "points": 0,
          "present": false,
          "value": 70
        },
        {
          "factor": "weight_kg",
          "points": 0,
          "present": false,
          "value": 95
        },
        {
          "factor": "liver_failure",
          "points": 0,
          "present": false
        },
        {
          "factor": "cns_dysfunction",
          "points": 0,
          "present": false
        },
        {
          "factor": "acute_renal_failure",
          "points": 0,
          "present": false
        },
        {
          "factor": "chronic_renal_failure",
          "points": 0,
          "present": false
        },
        {
          "factor": "intubation_hours",
          "points": 0,
          "present": false,
          "value": 5
        },
        {
          "factor": "pip_cmh2o",
          "points": 0,
          "present": false,
          "value": 25
        },
        {
          "factor": "pre_ecmo_cardiac_arrest",
          "points": 0,
          "present": false
        },
        {
          "factor": "diastolic_bp_mm_hg",
          "points": 0,
          "present": false,
          "value": 35
        },
        {
          "factor": "pulse_pressure_mm_hg",
          "points": 0,
          "present": false,
          "value": 40
        },
        {
          "factor": "bicarbonate_mmol_l",
          "points": 0,
          "present": false,
          "value": 24
        },
        {
          "factor": "constant",
          "points": -6,
          "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": "save",
      "formula_expression": "SAVE = constant(−6) + age(18–38 → 7, 39–52 → 4, 53–62 → 3, ≥63 → 0) + weight_kg(≤65 → 1, 66–89 → 2, ≥90 → 0) + myocarditis(3) + refractory_vt_vf(2) + post_heart_or_lung_transplant(3) + congenital_heart_disease(−3) + liver_failure(−3) + cns_dysfunction(−3) + acute_renal_failure(−3) + chronic_renal_failure(−6) + intubation_hours(≤10 → 0, 11–29 → −2, ≥30 → −4) + pip_cmh2o(≤20 → 3) + pre_ecmo_cardiac_arrest(−2) + diastolic_bp_mm_hg(≥40 → 3) + pulse_pressure_mm_hg(≤20 → −2) + bicarbonate_mmol_l(≤15 → −3); diagnoses and acute organ failures may stack (Table 4 select one or more); other diagnoses 0; range −35 to 17; class I >5 → 75%, II 1–5 → 58%, III −4 to 0 → 42%, IV −9 to −5 → 30%, V ≤−10 → 18%",
      "hospital_survival_percent": 30,
      "max_score": 17,
      "min_score": -35,
      "save_class": "IV",
      "score": -6
    }
  ],
  "path": "/api/calc/save"
}

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/save' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"acute_renal_failure":false,"age":70,"bicarbonate_mmol_l":24,"chronic_renal_failure":false,"cns_dysfunction":false,"congenital_heart_disease":false,"diastolic_bp_mm_hg":35,"intubation_hours":5,"liver_failure":false,"myocarditis":false,"pip_cmh2o":25,"post_heart_or_lung_transplant":false,"pre_ecmo_cardiac_arrest":false,"pulse_pressure_mm_hg":40,"refractory_vt_vf":false,"weight_kg":95},{"acute_renal_failure":false,"age":70,"bicarbonate_mmol_l":24,"chronic_renal_failure":false,"cns_dysfunction":false,"congenital_heart_disease":false,"diastolic_bp_mm_hg":35,"intubation_hours":5,"liver_failure":false,"myocarditis":false,"pip_cmh2o":25,"post_heart_or_lung_transplant":false,"pre_ecmo_cardiac_arrest":false,"pulse_pressure_mm_hg":40,"refractory_vt_vf":false,"weight_kg":95}]}'

# 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/save' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"acute_renal_failure":false,"age":70,"bicarbonate_mmol_l":24,"chronic_renal_failure":false,"cns_dysfunction":false,"congenital_heart_disease":false,"diastolic_bp_mm_hg":35,"intubation_hours":5,"liver_failure":false,"myocarditis":false,"pip_cmh2o":25,"post_heart_or_lung_transplant":false,"pre_ecmo_cardiac_arrest":false,"pulse_pressure_mm_hg":40,"refractory_vt_vf":false,"weight_kg":95},{"acute_renal_failure":false,"age":70,"bicarbonate_mmol_l":24,"chronic_renal_failure":false,"cns_dysfunction":false,"congenital_heart_disease":false,"diastolic_bp_mm_hg":35,"intubation_hours":5,"liver_failure":false,"myocarditis":false,"pip_cmh2o":25,"post_heart_or_lung_transplant":false,"pre_ecmo_cardiac_arrest":false,"pulse_pressure_mm_hg":40,"refractory_vt_vf":false,"weight_kg":95}]}' \
  | 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%2Fsave&method=POST
const res = await pay("https://api.magentlab.com/api/calc/save", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "acute_renal_failure": false,
        "age": 70,
        "bicarbonate_mmol_l": 24,
        "chronic_renal_failure": false,
        "cns_dysfunction": false,
        "congenital_heart_disease": false,
        "diastolic_bp_mm_hg": 35,
        "intubation_hours": 5,
        "liver_failure": false,
        "myocarditis": false,
        "pip_cmh2o": 25,
        "post_heart_or_lung_transplant": false,
        "pre_ecmo_cardiac_arrest": false,
        "pulse_pressure_mm_hg": 40,
        "refractory_vt_vf": false,
        "weight_kg": 95
      },
      {
        "acute_renal_failure": false,
        "age": 70,
        "bicarbonate_mmol_l": 24,
        "chronic_renal_failure": false,
        "cns_dysfunction": false,
        "congenital_heart_disease": false,
        "diastolic_bp_mm_hg": 35,
        "intubation_hours": 5,
        "liver_failure": false,
        "myocarditis": false,
        "pip_cmh2o": 25,
        "post_heart_or_lung_transplant": false,
        "pre_ecmo_cardiac_arrest": false,
        "pulse_pressure_mm_hg": 40,
        "refractory_vt_vf": false,
        "weight_kg": 95
      }
    ]
  }),
});
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/save",
        json={
            "items": [
                {
                    "acute_renal_failure": False,
                    "age": 70,
                    "bicarbonate_mmol_l": 24,
                    "chronic_renal_failure": False,
                    "cns_dysfunction": False,
                    "congenital_heart_disease": False,
                    "diastolic_bp_mm_hg": 35,
                    "intubation_hours": 5,
                    "liver_failure": False,
                    "myocarditis": False,
                    "pip_cmh2o": 25,
                    "post_heart_or_lung_transplant": False,
                    "pre_ecmo_cardiac_arrest": False,
                    "pulse_pressure_mm_hg": 40,
                    "refractory_vt_vf": False,
                    "weight_kg": 95,
                },
                {
                    "acute_renal_failure": False,
                    "age": 70,
                    "bicarbonate_mmol_l": 24,
                    "chronic_renal_failure": False,
                    "cns_dysfunction": False,
                    "congenital_heart_disease": False,
                    "diastolic_bp_mm_hg": 35,
                    "intubation_hours": 5,
                    "liver_failure": False,
                    "myocarditis": False,
                    "pip_cmh2o": 25,
                    "post_heart_or_lung_transplant": False,
                    "pre_ecmo_cardiac_arrest": False,
                    "pulse_pressure_mm_hg": 40,
                    "refractory_vt_vf": False,
                    "weight_kg": 95,
                },
            ],
        },
    )
    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	Passed	402	182 ms	$0.007
8 h ago	Passed	402	179 ms	$0.007
13 h ago	Passed	402	257 ms	$0.007
17 h ago	Passed	402	177 ms	$0.007
22 h ago	Passed	402	181 ms	$0.007

Show 10 older checks

26 h ago	Passed	402	210 ms	$0.007
30 h ago	Passed	402	281 ms	$0.007
34 h ago	Passed	402	179 ms	$0.007
39 h ago	Passed	402	180 ms	$0.007
43 h ago	Passed	402	190 ms	$0.007
47 h ago	Passed	402	298 ms	$0.007
2 days ago	Passed	402	147 ms	$0.007
2 days ago	Passed	402	341 ms	$0.007
3 days ago	Passed	402	147 ms	$0.007
3 days ago	Passed	402	172 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-save.svg)](https://toolvet.app/s/calc-save)