65trust / 100

Calc Berg Balance

by magent in Other

x402 APIFailing, checked 3 h ago

Berg 1992 Berg Balance Scale (BBS): fourteen caller-assigned integers 0-4 (sitting to standing through standing on one foot). Sum 0-56. magent does not observe. Berg 1992 printed no 0-20 wheelchair / 21-40 walking-with-assistance / 41-56 independent website bands. Not Timed Up and Go, not a diagnosis, and not a medical device.

POST

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

Price: $0.007; per call in USDC
Uptime: 89.2%; last 30 days
Response time: 292 ms; 631 ms slowest 5%
Last check: Failed; 3 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 3 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/berg_balance

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/berg_balance
content-type: application/json

{
  "items": [
    {
      "alternate_foot_on_stool": 0,
      "reaching_forward": 0,
      "retrieving_object_from_floor": 0,
      "sitting_to_standing": 0,
      "sitting_unsupported": 0,
      "standing_eyes_closed": 0,
      "standing_feet_together": 0,
      "standing_on_one_foot": 0,
      "standing_to_sitting": 0,
      "standing_unsupported": 0,
      "tandem_stance": 0,
      "transfers": 0,
      "turning_360": 0,
      "turning_to_look_behind": 0
    },
    {
      "alternate_foot_on_stool": 0,
      "reaching_forward": 0,
      "retrieving_object_from_floor": 0,
      "sitting_to_standing": 0,
      "sitting_unsupported": 0,
      "standing_eyes_closed": 0,
      "standing_feet_together": 0,
      "standing_on_one_foot": 0,
      "standing_to_sitting": 0,
      "standing_unsupported": 0,
      "tandem_stance": 0,
      "transfers": 0,
      "turning_360": 0,
      "turning_to_look_behind": 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, 206 lines

{
  "count": 2,
  "items": [
    {
      "citation": {
        "authors": "Berg KO, Wood-Dauphinee SL, Williams JI, Maki B",
        "id": "berg-1992",
        "pmid": "1468055",
        "source": "Can J Public Health. 1992;83 Suppl 2:S7-S11",
        "title": "Measuring balance in the elderly: validation of an instrument"
      },
      "components": [
        {
          "factor": "sitting_to_standing",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "standing_unsupported",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "sitting_unsupported",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "standing_to_sitting",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "transfers",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "standing_eyes_closed",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "standing_feet_together",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "reaching_forward",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "retrieving_object_from_floor",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "turning_to_look_behind",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "turning_360",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "alternate_foot_on_stool",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "tandem_stance",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "standing_on_one_foot",
          "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": "berg_balance",
      "formula_expression": "Berg Balance Scale = sitting_to_standing + standing_unsupported + sitting_unsupported + standing_to_sitting + transfers + standing_eyes_closed + standing_feet_together + reaching_forward + retrieving_object_from_floor + turning_to_look_behind + turning_360 + alternate_foot_on_stool + tandem_stance + standing_on_one_foot; each caller-assigned 0-4; Berg 1992 fourteen items; max 56; no 0-20 / 21-40 / 41-56 wheelchair/assist/independent website bands",
      "max_score": 56,
      "score": 0
    },
    {
      "citation": {
        "authors": "Berg KO, Wood-Dauphinee SL, Williams JI, Maki B",
        "id": "berg-1992",
        "pmid": "1468055",
        "source": "Can J Public Health. 1992;83 Suppl 2:S7-S11",
        "title": "Measuring balance in the elderly: validation of an instrument"
      },
      "components": [
        {
          "factor": "sitting_to_standing",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "standing_unsupported",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "sitting_unsupported",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "standing_to_sitting",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "transfers",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "standing_eyes_closed",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "standing_feet_together",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "reaching_forward",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "retrieving_object_from_floor",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "turning_to_look_behind",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "turning_360",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "alternate_foot_on_stool",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "tandem_stance",
          "points": 0,
          "present": true,
          "value": 0
        },
        {
          "factor": "standing_on_one_foot",
          "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": "berg_balance",
      "formula_expression": "Berg Balance Scale = sitting_to_standing + standing_unsupported + sitting_unsupported + standing_to_sitting + transfers + standing_eyes_closed + standing_feet_together + reaching_forward + retrieving_object_from_floor + turning_to_look_behind + turning_360 + alternate_foot_on_stool + tandem_stance + standing_on_one_foot; each caller-assigned 0-4; Berg 1992 fourteen items; max 56; no 0-20 / 21-40 / 41-56 wheelchair/assist/independent website bands",
      "max_score": 56,
      "score": 0
    }
  ],
  "path": "/api/calc/berg_balance"
}

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/berg_balance' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"alternate_foot_on_stool":0,"reaching_forward":0,"retrieving_object_from_floor":0,"sitting_to_standing":0,"sitting_unsupported":0,"standing_eyes_closed":0,"standing_feet_together":0,"standing_on_one_foot":0,"standing_to_sitting":0,"standing_unsupported":0,"tandem_stance":0,"transfers":0,"turning_360":0,"turning_to_look_behind":0},{"alternate_foot_on_stool":0,"reaching_forward":0,"retrieving_object_from_floor":0,"sitting_to_standing":0,"sitting_unsupported":0,"standing_eyes_closed":0,"standing_feet_together":0,"standing_on_one_foot":0,"standing_to_sitting":0,"standing_unsupported":0,"tandem_stance":0,"transfers":0,"turning_360":0,"turning_to_look_behind":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/berg_balance' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"alternate_foot_on_stool":0,"reaching_forward":0,"retrieving_object_from_floor":0,"sitting_to_standing":0,"sitting_unsupported":0,"standing_eyes_closed":0,"standing_feet_together":0,"standing_on_one_foot":0,"standing_to_sitting":0,"standing_unsupported":0,"tandem_stance":0,"transfers":0,"turning_360":0,"turning_to_look_behind":0},{"alternate_foot_on_stool":0,"reaching_forward":0,"retrieving_object_from_floor":0,"sitting_to_standing":0,"sitting_unsupported":0,"standing_eyes_closed":0,"standing_feet_together":0,"standing_on_one_foot":0,"standing_to_sitting":0,"standing_unsupported":0,"tandem_stance":0,"transfers":0,"turning_360":0,"turning_to_look_behind":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%2Fberg_balance&method=POST
const res = await pay("https://api.magentlab.com/api/calc/berg_balance", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "alternate_foot_on_stool": 0,
        "reaching_forward": 0,
        "retrieving_object_from_floor": 0,
        "sitting_to_standing": 0,
        "sitting_unsupported": 0,
        "standing_eyes_closed": 0,
        "standing_feet_together": 0,
        "standing_on_one_foot": 0,
        "standing_to_sitting": 0,
        "standing_unsupported": 0,
        "tandem_stance": 0,
        "transfers": 0,
        "turning_360": 0,
        "turning_to_look_behind": 0
      },
      {
        "alternate_foot_on_stool": 0,
        "reaching_forward": 0,
        "retrieving_object_from_floor": 0,
        "sitting_to_standing": 0,
        "sitting_unsupported": 0,
        "standing_eyes_closed": 0,
        "standing_feet_together": 0,
        "standing_on_one_foot": 0,
        "standing_to_sitting": 0,
        "standing_unsupported": 0,
        "tandem_stance": 0,
        "transfers": 0,
        "turning_360": 0,
        "turning_to_look_behind": 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/berg_balance",
        json={
            "items": [
                {
                    "alternate_foot_on_stool": 0,
                    "reaching_forward": 0,
                    "retrieving_object_from_floor": 0,
                    "sitting_to_standing": 0,
                    "sitting_unsupported": 0,
                    "standing_eyes_closed": 0,
                    "standing_feet_together": 0,
                    "standing_on_one_foot": 0,
                    "standing_to_sitting": 0,
                    "standing_unsupported": 0,
                    "tandem_stance": 0,
                    "transfers": 0,
                    "turning_360": 0,
                    "turning_to_look_behind": 0,
                },
                {
                    "alternate_foot_on_stool": 0,
                    "reaching_forward": 0,
                    "retrieving_object_from_floor": 0,
                    "sitting_to_standing": 0,
                    "sitting_unsupported": 0,
                    "standing_eyes_closed": 0,
                    "standing_feet_together": 0,
                    "standing_on_one_foot": 0,
                    "standing_to_sitting": 0,
                    "standing_unsupported": 0,
                    "tandem_stance": 0,
                    "transfers": 0,
                    "turning_360": 0,
                    "turning_to_look_behind": 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
3 h ago	Timed out	-	-	-
9 h ago	Timed out	-	-	-
14 h ago	Timed out	-	-	-
19 h ago	Timed out	-	-	-
23 h ago	Passed	402	330 ms	$0.007

Show 10 older checks

28 h ago	Passed	402	309 ms	$0.007
33 h ago	Passed	402	315 ms	$0.007
38 h ago	Passed	402	163 ms	$0.007
42 h ago	Passed	402	339 ms	$0.007
46 h ago	Passed	402	311 ms	$0.007
2 days ago	Passed	402	561 ms	$0.007
2 days ago	Passed	402	261 ms	$0.007
2 days ago	Passed	402	260 ms	$0.007
3 days ago	Passed	402	161 ms	$0.007
3 days ago	Passed	402	421 ms	$0.007

History

11 Oct 2026	Price changed from $0.005 to $0.007

Trust score 65/ 100

Availability (30-day uptime)		27 / 30
Valid x402 challenge		15 / 15
Response time		10 / 10
Real paying agents (30 days)		3 / 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: 1 in 30 days
Paid calls: 3 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-berg-balance.svg)](https://toolvet.app/s/calc-berg-balance)