71trust / 100

Calc Webster

x402 APIPassing, checked 37 min ago

Webster 1968 rating scale: ten caller-assigned integers 0-3 (bradykinesia, rigidity, posture, upper_extremity_swing, gait, tremor, facies, seborrhea, speech, self_care). magent sums only (max 30) and does not examine the patient. Score only; magent does not invent mild/moderate/severe total-score bands. Historical 10-item 0-30 sum. Not MDS-UPDRS and not a Parkinson diagnosis. Not a medical device.

POST

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

Price: $0.007; per call in USDC
Uptime: 100%; last 30 days
Response time: 251 ms; 550 ms slowest 5%
Last check: Passed; 37 min 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/webster

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/webster
content-type: application/json

{
  "items": [
    {
      "bradykinesia": 0,
      "facies": 0,
      "gait": 0,
      "posture": 0,
      "rigidity": 0,
      "seborrhea": 0,
      "self_care": 0,
      "speech": 0,
      "tremor": 0,
      "upper_extremity_swing": 0
    },
    {
      "bradykinesia": 0,
      "facies": 0,
      "gait": 0,
      "posture": 0,
      "rigidity": 0,
      "seborrhea": 0,
      "self_care": 0,
      "speech": 0,
      "tremor": 0,
      "upper_extremity_swing": 0
    }
  ]
}

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, 158 lines

{
  "count": 2,
  "items": [
    {
      "citation": {
        "authors": "Webster DD",
        "id": "webster-1968",
        "pmid": "5655944",
        "source": "Mod Treat. 1968;5(2):257-282",
        "title": "Critical analysis of the disability in Parkinson's disease"
      },
      "components": [
        {
          "factor": "bradykinesia",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "rigidity",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "posture",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "upper_extremity_swing",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "gait",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "tremor",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "facies",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "seborrhea",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "speech",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "self_care",
          "points": 0,
          "present": true,
          "value": 0
        }
      ],
      "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": "webster",
      "formula_expression": "Webster = bradykinesia + rigidity + posture + upper_extremity_swing + gait + tremor + facies + seborrhea + speech + self_care; each caller-assigned integer 0-3; max 30",
      "max_score": 30,
      "score": 0
    },
    {
      "citation": {
        "authors": "Webster DD",
        "id": "webster-1968",
        "pmid": "5655944",
        "source": "Mod Treat. 1968;5(2):257-282",
        "title": "Critical analysis of the disability in Parkinson's disease"
      },
      "components": [
        {
          "factor": "bradykinesia",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "rigidity",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "posture",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "upper_extremity_swing",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "gait",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "tremor",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "facies",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "seborrhea",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "speech",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "self_care",
          "points": 0,
          "present": true,
          "value": 0
        }
      ],
      "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": "webster",
      "formula_expression": "Webster = bradykinesia + rigidity + posture + upper_extremity_swing + gait + tremor + facies + seborrhea + speech + self_care; each caller-assigned integer 0-3; max 30",
      "max_score": 30,
      "score": 0
    }
  ],
  "path": "/api/calc/webster"
}

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/webster' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"bradykinesia":0,"facies":0,"gait":0,"posture":0,"rigidity":0,"seborrhea":0,"self_care":0,"speech":0,"tremor":0,"upper_extremity_swing":0},{"bradykinesia":0,"facies":0,"gait":0,"posture":0,"rigidity":0,"seborrhea":0,"self_care":0,"speech":0,"tremor":0,"upper_extremity_swing":0}]}'

# 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/webster' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"bradykinesia":0,"facies":0,"gait":0,"posture":0,"rigidity":0,"seborrhea":0,"self_care":0,"speech":0,"tremor":0,"upper_extremity_swing":0},{"bradykinesia":0,"facies":0,"gait":0,"posture":0,"rigidity":0,"seborrhea":0,"self_care":0,"speech":0,"tremor":0,"upper_extremity_swing":0}]}' \
  | 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%2Fwebster&method=POST
const res = await pay("https://api.magentlab.com/api/calc/webster", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "bradykinesia": 0,
        "facies": 0,
        "gait": 0,
        "posture": 0,
        "rigidity": 0,
        "seborrhea": 0,
        "self_care": 0,
        "speech": 0,
        "tremor": 0,
        "upper_extremity_swing": 0
      },
      {
        "bradykinesia": 0,
        "facies": 0,
        "gait": 0,
        "posture": 0,
        "rigidity": 0,
        "seborrhea": 0,
        "self_care": 0,
        "speech": 0,
        "tremor": 0,
        "upper_extremity_swing": 0
      }
    ]
  }),
});
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/webster",
        json={
            "items": [
                {
                    "bradykinesia": 0,
                    "facies": 0,
                    "gait": 0,
                    "posture": 0,
                    "rigidity": 0,
                    "seborrhea": 0,
                    "self_care": 0,
                    "speech": 0,
                    "tremor": 0,
                    "upper_extremity_swing": 0,
                },
                {
                    "bradykinesia": 0,
                    "facies": 0,
                    "gait": 0,
                    "posture": 0,
                    "rigidity": 0,
                    "seborrhea": 0,
                    "self_care": 0,
                    "speech": 0,
                    "tremor": 0,
                    "upper_extremity_swing": 0,
                },
            ],
        },
    )
    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
37 min ago	Passed	402	306 ms	$0.007
5 h ago	Passed	402	436 ms	$0.007
10 h ago	Passed	402	224 ms	$0.007
15 h ago	Passed	402	401 ms	$0.007
19 h ago	Passed	402	292 ms	$0.007

Show 10 older checks

24 h ago	Passed	402	166 ms	$0.007
28 h ago	Passed	402	251 ms	$0.007
33 h ago	Passed	402	150 ms	$0.007
37 h ago	Passed	402	399 ms	$0.007
41 h ago	Passed	402	235 ms	$0.007
45 h ago	Passed	402	332 ms	$0.007
2 days ago	Passed	402	286 ms	$0.007
2 days ago	Passed	402	282 ms	$0.007
2 days ago	Passed	402	361 ms	$0.007
3 days ago	Passed	402	431 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: 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-webster.svg)](https://toolvet.app/s/calc-webster)