67trust / 100

Calc Circ

x402 APIFailing, checked 4 h ago

Garibaldi 2020 CIRC day-2/4/7 probability of severe disease or death from admission age, nursing-home residence, caller-assigned race term, Charlson CCI, BMI, symptoms, vitals, and listed laboratories. Appendix Table 1 coefficients on the printed reference cumulative incidences. Not a diagnosis, triage order, or the death-only Appendix Table 2 model.

POST

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

Price: $0.007; per call in USDC
Uptime: 91.4%; last 30 days
Response time: 234 ms; 803 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/circ

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/circ
content-type: application/json

{
  "items": [
    {
      "age": 65,
      "albumin_g_dl": 3.7,
      "alt_u_l": 30,
      "bmi": 30,
      "cci": 0,
      "constitutional_symptoms": false,
      "crp_mg_dl": 5.7,
      "d_dimer_gt_1": false,
      "ferritin_ng_ml": 545,
      "fever": false,
      "gastrointestinal_symptoms": false,
      "gfr": 71,
      "hemoglobin_g_dl": 12.9,
      "leukocyte_k": 6.8,
      "loss_of_taste_smell": false,
      "lymphocyte_k": 1,
      "nursing_home": false,
      "pulse": 85,
      "race": "white",
      "respiratory_rate": 21,
      "respiratory_symptoms": false,
      "sex": "female",
      "troponin_detectable": false
    },
    {
      "age": 65,
      "albumin_g_dl": 3.7,
      "alt_u_l": 30,
      "bmi": 30,
      "cci": 0,
      "constitutional_symptoms": false,
      "crp_mg_dl": 5.7,
      "d_dimer_gt_1": false,
      "ferritin_ng_ml": 545,
      "fever": false,
      "gastrointestinal_symptoms": false,
      "gfr": 71,
      "hemoglobin_g_dl": 12.9,
      "leukocyte_k": 6.8,
      "loss_of_taste_smell": false,
      "lymphocyte_k": 1,
      "nursing_home": false,
      "pulse": 85,
      "race": "white",
      "respiratory_rate": 21,
      "respiratory_symptoms": false,
      "sex": "female",
      "troponin_detectable": false
    }
  ]
}

Parameters

Parameter	Type	Required	Description
`items`	array of object	Yes

Example response

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

Example response, 90 lines

{
  "count": 2,
  "items": [
    {
      "age": 65,
      "age_band": "60_74",
      "albumin_g_dl": 3.7,
      "alt_u_l": 30,
      "bmi": 30,
      "cci": 0,
      "citation": {
        "authors": "Garibaldi BT, Fiksel J, Muschelli J, et al.",
        "doi": "10.7326/M20-3905",
        "id": "garibaldi-2020-circ",
        "pmid": "32960645",
        "source": "Ann Intern Med. 2021;174(1):33-41",
        "title": "Patient Trajectories Among Persons Hospitalized for COVID-19: A Cohort Study"
      },
      "constitutional_symptoms": false,
      "crp_mg_dl": 5.7,
      "d_dimer_gt_1": false,
      "day_2_percent": 10,
      "day_4_percent": 13,
      "day_7_percent": 15,
      "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.",
      "ferritin_ng_ml": 545,
      "fever": false,
      "formula": "circ",
      "formula_expression": "delta = lp(x) - lp(x0); P(t) = 1-(1-P0(t))^exp(delta); Garibaldi 2020 Appendix Table 1 estimates; x0 White female age 60-74 not from a nursing home BMI 30 CCI 0 no symptoms no fever pulse 85 RR 21 leukocyte 6.8 ALC 1.0 ALT 30 albumin 3.7 GFR 71 CRP 5.7 hemoglobin 12.9 ferritin 545 troponin not detectable D-dimer not >1; P0 day2 0.10 day4 0.13 day7 0.15; age<60 -0.61 age>=75 -0.71; NH <75 -0.24 >=75 -0.22; male <60 0.31 60-74 -0.47 >=75 0.10; BMI per 5 0.17; Non-White vs White 0.08 (caller-assigned); CCI per 1 <60 0.19 60-74 -0.23 >=75 0.14; respiratory 0.81 GI -0.14 constitutional -0.57 taste/smell -0.30 fever>38.0 0.56; pulse per 10 -0.02; RR linear spline knot 18: <18 per unit -0.25, >=18 per unit 0.13; ln leukocyte -0.06 ln ALC -0.29 ln ALT 0.02; hemoglobin per 1 g/dL decrease 0.04; albumin per 0.5 g/dL decrease below 4 0.23; GFR per 10 -0.03; ln CRP 0.20 ln ferritin 0.11; troponin detectable <60 0.19 60-74 1.36 >=75 0.35; D-dimer >1 0.24; natural log; not Appendix Table 2 death-on…",
      "gastrointestinal_symptoms": false,
      "gfr": 71,
      "hemoglobin_g_dl": 12.9,
      "leukocyte_k": 6.8,
      "logit_delta": 0,
      "loss_of_taste_smell": false,
      "lymphocyte_k": 1,
      "nursing_home": false,
      "obesity": true,
      "pulse": 85,
      "race": "white",
      "respiratory_rate": 21,
      "respiratory_symptoms": false,
      "sex": "female",
      "troponin_detectable": false
    },
    {
      "age": 65,
      "age_band": "60_74",
      "albumin_g_dl": 3.7,
      "alt_u_l": 30,
      "bmi": 30,
      "cci": 0,
      "citation": {
        "authors": "Garibaldi BT, Fiksel J, Muschelli J, et al.",
        "doi": "10.7326/M20-3905",
        "id": "garibaldi-2020-circ",
        "pmid": "32960645",
        "source": "Ann Intern Med. 2021;174(1):33-41",
        "title": "Patient Trajectories Among Persons Hospitalized for COVID-19: A Cohort Study"
      },
      "constitutional_symptoms": false,
      "crp_mg_dl": 5.7,
      "d_dimer_gt_1": false,
      "day_2_percent": 10,
      "day_4_percent": 13,
      "day_7_percent": 15,
      "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.",
      "ferritin_ng_ml": 545,
      "fever": false,
      "formula": "circ",
      "formula_expression": "delta = lp(x) - lp(x0); P(t) = 1-(1-P0(t))^exp(delta); Garibaldi 2020 Appendix Table 1 estimates; x0 White female age 60-74 not from a nursing home BMI 30 CCI 0 no symptoms no fever pulse 85 RR 21 leukocyte 6.8 ALC 1.0 ALT 30 albumin 3.7 GFR 71 CRP 5.7 hemoglobin 12.9 ferritin 545 troponin not detectable D-dimer not >1; P0 day2 0.10 day4 0.13 day7 0.15; age<60 -0.61 age>=75 -0.71; NH <75 -0.24 >=75 -0.22; male <60 0.31 60-74 -0.47 >=75 0.10; BMI per 5 0.17; Non-White vs White 0.08 (caller-assigned); CCI per 1 <60 0.19 60-74 -0.23 >=75 0.14; respiratory 0.81 GI -0.14 constitutional -0.57 taste/smell -0.30 fever>38.0 0.56; pulse per 10 -0.02; RR linear spline knot 18: <18 per unit -0.25, >=18 per unit 0.13; ln leukocyte -0.06 ln ALC -0.29 ln ALT 0.02; hemoglobin per 1 g/dL decrease 0.04; albumin per 0.5 g/dL decrease below 4 0.23; GFR per 10 -0.03; ln CRP 0.20 ln ferritin 0.11; troponin detectable <60 0.19 60-74 1.36 >=75 0.35; D-dimer >1 0.24; natural log; not Appendix Table 2 death-on…",
      "gastrointestinal_symptoms": false,
      "gfr": 71,
      "hemoglobin_g_dl": 12.9,
      "leukocyte_k": 6.8,
      "logit_delta": 0,
      "loss_of_taste_smell": false,
      "lymphocyte_k": 1,
      "nursing_home": false,
      "obesity": true,
      "pulse": 85,
      "race": "white",
      "respiratory_rate": 21,
      "respiratory_symptoms": false,
      "sex": "female",
      "troponin_detectable": false
    }
  ],
  "path": "/api/calc/circ"
}

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/circ' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"age":65,"albumin_g_dl":3.7,"alt_u_l":30,"bmi":30,"cci":0,"constitutional_symptoms":false,"crp_mg_dl":5.7,"d_dimer_gt_1":false,"ferritin_ng_ml":545,"fever":false,"gastrointestinal_symptoms":false,"gfr":71,"hemoglobin_g_dl":12.9,"leukocyte_k":6.8,"loss_of_taste_smell":false,"lymphocyte_k":1,"nursing_home":false,"pulse":85,"race":"white","respiratory_rate":21,"respiratory_symptoms":false,"sex":"female","troponin_detectable":false},{"age":65,"albumin_g_dl":3.7,"alt_u_l":30,"bmi":30,"cci":0,"constitutional_symptoms":false,"crp_mg_dl":5.7,"d_dimer_gt_1":false,"ferritin_ng_ml":545,"fever":false,"gastrointestinal_symptoms":false,"gfr":71,"hemoglobin_g_dl":12.9,"leukocyte_k":6.8,"loss_of_taste_smell":false,"lymphocyte_k":1,"nursing_home":false,"pulse":85,"race":"white","respiratory_rate":21,"respiratory_symptoms":false,"sex":"female","troponin_detectable":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/circ' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"age":65,"albumin_g_dl":3.7,"alt_u_l":30,"bmi":30,"cci":0,"constitutional_symptoms":false,"crp_mg_dl":5.7,"d_dimer_gt_1":false,"ferritin_ng_ml":545,"fever":false,"gastrointestinal_symptoms":false,"gfr":71,"hemoglobin_g_dl":12.9,"leukocyte_k":6.8,"loss_of_taste_smell":false,"lymphocyte_k":1,"nursing_home":false,"pulse":85,"race":"white","respiratory_rate":21,"respiratory_symptoms":false,"sex":"female","troponin_detectable":false},{"age":65,"albumin_g_dl":3.7,"alt_u_l":30,"bmi":30,"cci":0,"constitutional_symptoms":false,"crp_mg_dl":5.7,"d_dimer_gt_1":false,"ferritin_ng_ml":545,"fever":false,"gastrointestinal_symptoms":false,"gfr":71,"hemoglobin_g_dl":12.9,"leukocyte_k":6.8,"loss_of_taste_smell":false,"lymphocyte_k":1,"nursing_home":false,"pulse":85,"race":"white","respiratory_rate":21,"respiratory_symptoms":false,"sex":"female","troponin_detectable":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%2Fcirc&method=POST
const res = await pay("https://api.magentlab.com/api/calc/circ", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "age": 65,
        "albumin_g_dl": 3.7,
        "alt_u_l": 30,
        "bmi": 30,
        "cci": 0,
        "constitutional_symptoms": false,
        "crp_mg_dl": 5.7,
        "d_dimer_gt_1": false,
        "ferritin_ng_ml": 545,
        "fever": false,
        "gastrointestinal_symptoms": false,
        "gfr": 71,
        "hemoglobin_g_dl": 12.9,
        "leukocyte_k": 6.8,
        "loss_of_taste_smell": false,
        "lymphocyte_k": 1,
        "nursing_home": false,
        "pulse": 85,
        "race": "white",
        "respiratory_rate": 21,
        "respiratory_symptoms": false,
        "sex": "female",
        "troponin_detectable": false
      },
      {
        "age": 65,
        "albumin_g_dl": 3.7,
        "alt_u_l": 30,
        "bmi": 30,
        "cci": 0,
        "constitutional_symptoms": false,
        "crp_mg_dl": 5.7,
        "d_dimer_gt_1": false,
        "ferritin_ng_ml": 545,
        "fever": false,
        "gastrointestinal_symptoms": false,
        "gfr": 71,
        "hemoglobin_g_dl": 12.9,
        "leukocyte_k": 6.8,
        "loss_of_taste_smell": false,
        "lymphocyte_k": 1,
        "nursing_home": false,
        "pulse": 85,
        "race": "white",
        "respiratory_rate": 21,
        "respiratory_symptoms": false,
        "sex": "female",
        "troponin_detectable": 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/circ",
        json={
            "items": [
                {
                    "age": 65,
                    "albumin_g_dl": 3.7,
                    "alt_u_l": 30,
                    "bmi": 30,
                    "cci": 0,
                    "constitutional_symptoms": False,
                    "crp_mg_dl": 5.7,
                    "d_dimer_gt_1": False,
                    "ferritin_ng_ml": 545,
                    "fever": False,
                    "gastrointestinal_symptoms": False,
                    "gfr": 71,
                    "hemoglobin_g_dl": 12.9,
                    "leukocyte_k": 6.8,
                    "loss_of_taste_smell": False,
                    "lymphocyte_k": 1,
                    "nursing_home": False,
                    "pulse": 85,
                    "race": "white",
                    "respiratory_rate": 21,
                    "respiratory_symptoms": False,
                    "sex": "female",
                    "troponin_detectable": False,
                },
                {
                    "age": 65,
                    "albumin_g_dl": 3.7,
                    "alt_u_l": 30,
                    "bmi": 30,
                    "cci": 0,
                    "constitutional_symptoms": False,
                    "crp_mg_dl": 5.7,
                    "d_dimer_gt_1": False,
                    "ferritin_ng_ml": 545,
                    "fever": False,
                    "gastrointestinal_symptoms": False,
                    "gfr": 71,
                    "hemoglobin_g_dl": 12.9,
                    "leukocyte_k": 6.8,
                    "loss_of_taste_smell": False,
                    "lymphocyte_k": 1,
                    "nursing_home": False,
                    "pulse": 85,
                    "race": "white",
                    "respiratory_rate": 21,
                    "respiratory_symptoms": False,
                    "sex": "female",
                    "troponin_detectable": 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	Timed out	-	-	-
18 h ago	Passed	402	315 ms	$0.007
23 h ago	Passed	402	322 ms	$0.007

Show 10 older checks

28 h ago	Passed	402	146 ms	$0.007
33 h ago	Passed	402	332 ms	$0.007
37 h ago	Passed	402	157 ms	$0.007
42 h ago	Passed	402	152 ms	$0.007
46 h ago	Passed	402	142 ms	$0.007
2 days ago	Passed	402	585 ms	$0.007
2 days ago	Passed	402	273 ms	$0.007
2 days ago	Passed	402	163 ms	$0.007
3 days ago	Passed	402	390 ms	$0.007
3 days ago	Passed	402	143 ms	$0.007

History

11 Oct 2026	Price changed from $0.005 to $0.007

Trust score 67/ 100

Availability (30-day uptime)		27 / 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: 5 days ago

Source: x402 Bazaar settlement data.

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Trust score

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