71trust / 100

Calc Vacs 1

by magent in Other

x402 APIPassing, checked 43 min ago

Tate 2013 VACS Index 1.0 (not VACS 2.0): age, CD4, HIV-1 RNA, hemoglobin g/dL, caller-assigned FIB-4 and eGFR, and hepatitis C. Points 0-164. No published named mortality bands. magent does not compute FIB-4 or MDRD/CKD-EPI and does not order ART.

POST

https://api.magentlab.com/api/calc/vacs_1

Price: $0.007; per call in USDC
Uptime: 100%; last 30 days
Response time: 170 ms; 631 ms slowest 5%
Last check: Passed; 43 min ago, next any minute now

Run a free test call How to call it

Reliability

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

How to call it

POST https://api.magentlab.com/api/calc/vacs_1

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/vacs_1
content-type: application/json

{
  "items": [
    {
      "age": 40,
      "cd4_cells_mm3": 600,
      "egfr_ml_min_1_73m2": 90,
      "fib4": 1,
      "hemoglobin_g_dl": 15,
      "hepatitis_c": false,
      "hiv_rna_copies_ml": 200
    },
    {
      "age": 40,
      "cd4_cells_mm3": 600,
      "egfr_ml_min_1_73m2": 90,
      "fib4": 1,
      "hemoglobin_g_dl": 15,
      "hepatitis_c": false,
      "hiv_rna_copies_ml": 200
    }
  ]
}

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, 136 lines

{
  "count": 2,
  "items": [
    {
      "age": 40,
      "cd4_cells_mm3": 600,
      "citation": {
        "authors": "Tate JP, Justice AC, Hughes MD, Bonnet F, Reiss P, Mocroft A, et al.",
        "doi": "10.1097/QAD.0b013e32835b8c7f",
        "id": "tate-2013",
        "pmid": "23242319",
        "source": "AIDS. 2013;27(4):563-572",
        "title": "The VACS Index: An internationally generalizable risk index for mortality after one year of antiretroviral therapy"
      },
      "components": [
        {
          "factor": "age",
          "points": 0,
          "present": false,
          "value": 40
        },
        {
          "factor": "cd4_cells_mm3",
          "points": 0,
          "present": false,
          "value": 600
        },
        {
          "factor": "hiv_rna_copies_ml",
          "points": 0,
          "present": false,
          "value": 200
        },
        {
          "factor": "hemoglobin_g_dl",
          "points": 0,
          "present": false,
          "value": 15
        },
        {
          "factor": "fib4",
          "points": 0,
          "present": false,
          "value": 1
        },
        {
          "factor": "egfr_ml_min_1_73m2",
          "points": 0,
          "present": false,
          "value": 90
        },
        {
          "factor": "hepatitis_c",
          "points": 0,
          "present": false
        }
      ],
      "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.",
      "egfr_ml_min_1_73m2": 90,
      "fib4": 1,
      "formula": "vacs_1",
      "formula_expression": "VACS 1.0 = age (<50 0; 50-64 12; ≥65 27) + cd4_cells_mm3 (≥500 0; 350-499 6; 200-349 6; 100-199 10; 50-99 28; <50 29) + hiv_rna_copies_ml (<500 0; 500-99999 7; ≥100000 14) + hemoglobin_g_dl (≥14 0; 12-13.9 10; 10-11.9 22; <10 38) + fib4 (<1.45 0; 1.45-3.25 6; >3.25 25) + egfr_ml_min_1_73m2 (≥60 0; 45-59.9 6; 30-44.9 8; <30 26) + hepatitis_c 5; Tate 2013 VACS Index column (Brown 2014 Table 1 reprint); max 164; caller-assigned FIB-4 and eGFR; not VACS 2.0",
      "hemoglobin_g_dl": 15,
      "hepatitis_c": false,
      "hiv_rna_copies_ml": 200,
      "max_score": 164,
      "score": 0
    },
    {
      "age": 40,
      "cd4_cells_mm3": 600,
      "citation": {
        "authors": "Tate JP, Justice AC, Hughes MD, Bonnet F, Reiss P, Mocroft A, et al.",
        "doi": "10.1097/QAD.0b013e32835b8c7f",
        "id": "tate-2013",
        "pmid": "23242319",
        "source": "AIDS. 2013;27(4):563-572",
        "title": "The VACS Index: An internationally generalizable risk index for mortality after one year of antiretroviral therapy"
      },
      "components": [
        {
          "factor": "age",
          "points": 0,
          "present": false,
          "value": 40
        },
        {
          "factor": "cd4_cells_mm3",
          "points": 0,
          "present": false,
          "value": 600
        },
        {
          "factor": "hiv_rna_copies_ml",
          "points": 0,
          "present": false,
          "value": 200
        },
        {
          "factor": "hemoglobin_g_dl",
          "points": 0,
          "present": false,
          "value": 15
        },
        {
          "factor": "fib4",
          "points": 0,
          "present": false,
          "value": 1
        },
        {
          "factor": "egfr_ml_min_1_73m2",
          "points": 0,
          "present": false,
          "value": 90
        },
        {
          "factor": "hepatitis_c",
          "points": 0,
          "present": false
        }
      ],
      "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.",
      "egfr_ml_min_1_73m2": 90,
      "fib4": 1,
      "formula": "vacs_1",
      "formula_expression": "VACS 1.0 = age (<50 0; 50-64 12; ≥65 27) + cd4_cells_mm3 (≥500 0; 350-499 6; 200-349 6; 100-199 10; 50-99 28; <50 29) + hiv_rna_copies_ml (<500 0; 500-99999 7; ≥100000 14) + hemoglobin_g_dl (≥14 0; 12-13.9 10; 10-11.9 22; <10 38) + fib4 (<1.45 0; 1.45-3.25 6; >3.25 25) + egfr_ml_min_1_73m2 (≥60 0; 45-59.9 6; 30-44.9 8; <30 26) + hepatitis_c 5; Tate 2013 VACS Index column (Brown 2014 Table 1 reprint); max 164; caller-assigned FIB-4 and eGFR; not VACS 2.0",
      "hemoglobin_g_dl": 15,
      "hepatitis_c": false,
      "hiv_rna_copies_ml": 200,
      "max_score": 164,
      "score": 0
    }
  ],
  "path": "/api/calc/vacs_1"
}

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/vacs_1' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"age":40,"cd4_cells_mm3":600,"egfr_ml_min_1_73m2":90,"fib4":1,"hemoglobin_g_dl":15,"hepatitis_c":false,"hiv_rna_copies_ml":200},{"age":40,"cd4_cells_mm3":600,"egfr_ml_min_1_73m2":90,"fib4":1,"hemoglobin_g_dl":15,"hepatitis_c":false,"hiv_rna_copies_ml":200}]}'

# 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/vacs_1' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"age":40,"cd4_cells_mm3":600,"egfr_ml_min_1_73m2":90,"fib4":1,"hemoglobin_g_dl":15,"hepatitis_c":false,"hiv_rna_copies_ml":200},{"age":40,"cd4_cells_mm3":600,"egfr_ml_min_1_73m2":90,"fib4":1,"hemoglobin_g_dl":15,"hepatitis_c":false,"hiv_rna_copies_ml":200}]}' \
  | 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%2Fvacs_1&method=POST
const res = await pay("https://api.magentlab.com/api/calc/vacs_1", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "age": 40,
        "cd4_cells_mm3": 600,
        "egfr_ml_min_1_73m2": 90,
        "fib4": 1,
        "hemoglobin_g_dl": 15,
        "hepatitis_c": false,
        "hiv_rna_copies_ml": 200
      },
      {
        "age": 40,
        "cd4_cells_mm3": 600,
        "egfr_ml_min_1_73m2": 90,
        "fib4": 1,
        "hemoglobin_g_dl": 15,
        "hepatitis_c": false,
        "hiv_rna_copies_ml": 200
      }
    ]
  }),
});
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/vacs_1",
        json={
            "items": [
                {
                    "age": 40,
                    "cd4_cells_mm3": 600,
                    "egfr_ml_min_1_73m2": 90,
                    "fib4": 1,
                    "hemoglobin_g_dl": 15,
                    "hepatitis_c": False,
                    "hiv_rna_copies_ml": 200,
                },
                {
                    "age": 40,
                    "cd4_cells_mm3": 600,
                    "egfr_ml_min_1_73m2": 90,
                    "fib4": 1,
                    "hemoglobin_g_dl": 15,
                    "hepatitis_c": False,
                    "hiv_rna_copies_ml": 200,
                },
            ],
        },
    )
    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
43 min ago	Passed	402	137 ms	$0.007
6 h ago	Passed	402	148 ms	$0.007
10 h ago	Passed	402	392 ms	$0.007
15 h ago	Passed	402	170 ms	$0.007
19 h ago	Passed	402	152 ms	$0.007

Show 10 older checks

24 h ago	Passed	402	172 ms	$0.007
28 h ago	Passed	402	141 ms	$0.007
32 h ago	Passed	402	308 ms	$0.007
36 h ago	Passed	402	1.5 s	$0.007
41 h ago	Passed	402	163 ms	$0.007
45 h ago	Passed	402	202 ms	$0.007
2 days ago	Passed	402	160 ms	$0.007
2 days ago	Passed	402	191 ms	$0.007
2 days ago	Passed	402	146 ms	$0.007
3 days ago	Passed	402	532 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: 4 days ago

Source: x402 Bazaar settlement data.

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Trust score

[![ToolVet trust score](https://toolvet.app/badge/calc-vacs-1.svg)](https://toolvet.app/s/calc-vacs-1)