ToolVet
69trust / 100

Calc Ottawa Ankle

by magent in Other

x402 APIFailing, checked 58 min ago

Ottawa ankle rule (Stiell 1992). Ankle x-ray is indicated when there is malleolar-zone pain and any of: bone tenderness at the posterior edge or tip of the lateral or medial malleolus, or inability to bear weight both immediately after injury and in the emergency department (four steps). One weight-bearing failure alone is not enough. Not a diagnosis of fracture, not the Ottawa foot rule, and not the Pittsburgh knee rule. magent does not examine the ankle.

POST
https://api.magentlab.com/api/calc/ottawa_ankle
Price
$0.007
per call in USDC
Uptime
97.0%
last 30 days
Response time
147 ms
540 ms slowest 5%
Last check
Failed
58 min ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Latest check failed 58 min ago: Timed out

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

How to call it

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

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/ottawa_ankle
content-type: application/json

{
  "items": [
    {
      "lateral_malleolus_tenderness": false,
      "malleolar_pain": false,
      "medial_malleolus_tenderness": false,
      "unable_to_bear_weight_immediately": false,
      "unable_to_bear_weight_in_ed": false
    },
    {
      "lateral_malleolus_tenderness": false,
      "malleolar_pain": false,
      "medial_malleolus_tenderness": false,
      "unable_to_bear_weight_immediately": false,
      "unable_to_bear_weight_in_ed": false
    }
  ]
}

Parameters

ParameterTypeRequiredDescription
itemsarray of objectYes

Example response

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

Example response, 72 lines
{
  "count": 2,
  "items": [
    {
      "citation": {
        "authors": "Stiell IG, Greenberg GH, McKnight RD, Nair RC, McDowell I, Worthington JR",
        "doi": "10.1016/S0196-0644(05)82656-3",
        "id": "stiell-1992",
        "source": "Ann Emerg Med. 1992;21(4):384-390",
        "title": "A study to develop clinical decision rules for the use of radiography in acute ankle injuries"
      },
      "criteria": [
        {
          "factor": "malleolar_pain",
          "met": false
        },
        {
          "factor": "lateral_malleolus_tenderness",
          "met": false
        },
        {
          "factor": "medial_malleolus_tenderness",
          "met": false
        },
        {
          "factor": "unable_to_bear_weight_both",
          "met": false,
          "unable_to_bear_weight_immediately": false,
          "unable_to_bear_weight_in_ed": 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.",
      "formula": "ottawa_ankle",
      "formula_expression": "Ankle x-ray indicated iff malleolar_pain and (lateral_malleolus_tenderness or medial_malleolus_tenderness or (unable_to_bear_weight_immediately and unable_to_bear_weight_in_ed))",
      "xray_indicated": false
    },
    {
      "citation": {
        "authors": "Stiell IG, Greenberg GH, McKnight RD, Nair RC, McDowell I, Worthington JR",
        "doi": "10.1016/S0196-0644(05)82656-3",
        "id": "stiell-1992",
        "source": "Ann Emerg Med. 1992;21(4):384-390",
        "title": "A study to develop clinical decision rules for the use of radiography in acute ankle injuries"
      },
      "criteria": [
        {
          "factor": "malleolar_pain",
          "met": false
        },
        {
          "factor": "lateral_malleolus_tenderness",
          "met": false
        },
        {
          "factor": "medial_malleolus_tenderness",
          "met": false
        },
        {
          "factor": "unable_to_bear_weight_both",
          "met": false,
          "unable_to_bear_weight_immediately": false,
          "unable_to_bear_weight_in_ed": 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.",
      "formula": "ottawa_ankle",
      "formula_expression": "Ankle x-ray indicated iff malleolar_pain and (lateral_malleolus_tenderness or medial_malleolus_tenderness or (unable_to_bear_weight_immediately and unable_to_bear_weight_in_ed))",
      "xray_indicated": false
    }
  ],
  "path": "/api/calc/ottawa_ankle"
}

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/ottawa_ankle' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"lateral_malleolus_tenderness":false,"malleolar_pain":false,"medial_malleolus_tenderness":false,"unable_to_bear_weight_immediately":false,"unable_to_bear_weight_in_ed":false},{"lateral_malleolus_tenderness":false,"malleolar_pain":false,"medial_malleolus_tenderness":false,"unable_to_bear_weight_immediately":false,"unable_to_bear_weight_in_ed":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/ottawa_ankle' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"lateral_malleolus_tenderness":false,"malleolar_pain":false,"medial_malleolus_tenderness":false,"unable_to_bear_weight_immediately":false,"unable_to_bear_weight_in_ed":false},{"lateral_malleolus_tenderness":false,"malleolar_pain":false,"medial_malleolus_tenderness":false,"unable_to_bear_weight_immediately":false,"unable_to_bear_weight_in_ed":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%2Fottawa_ankle&method=POST
const res = await pay("https://api.magentlab.com/api/calc/ottawa_ankle", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "lateral_malleolus_tenderness": false,
        "malleolar_pain": false,
        "medial_malleolus_tenderness": false,
        "unable_to_bear_weight_immediately": false,
        "unable_to_bear_weight_in_ed": false
      },
      {
        "lateral_malleolus_tenderness": false,
        "malleolar_pain": false,
        "medial_malleolus_tenderness": false,
        "unable_to_bear_weight_immediately": false,
        "unable_to_bear_weight_in_ed": 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/ottawa_ankle",
        json={
            "items": [
                {
                    "lateral_malleolus_tenderness": False,
                    "malleolar_pain": False,
                    "medial_malleolus_tenderness": False,
                    "unable_to_bear_weight_immediately": False,
                    "unable_to_bear_weight_in_ed": False,
                },
                {
                    "lateral_malleolus_tenderness": False,
                    "malleolar_pain": False,
                    "medial_malleolus_tenderness": False,
                    "unable_to_bear_weight_immediately": False,
                    "unable_to_bear_weight_in_ed": 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

WhenResultHTTPTimePrice
58 min agoTimed out---
6 h agoPassed402147 ms$0.007
11 h agoPassed402168 ms$0.007
15 h agoPassed402137 ms$0.007
20 h agoPassed402143 ms$0.007
Show 10 older checks
25 h agoPassed402228 ms$0.007
29 h agoPassed402314 ms$0.007
33 h agoPassed402898 ms$0.007
37 h agoPassed402144 ms$0.007
41 h agoPassed402138 ms$0.007
46 h agoPassed402160 ms$0.007
2 days agoPassed402381 ms$0.007
2 days agoPassed402141 ms$0.007
2 days agoPassed402154 ms$0.007
3 days agoPassed402141 ms$0.007

History

11 Oct 2026Price changed from $0.005 to $0.007