Agent Service · x402 · early usage

PASCAL (PFO-Associated Stroke Causal Likelihood; Kent 2021 JAMA Table 1) from a caller-…

by api.magentlab.com · discovered, not yet claimed by its owner · updated 2026-10-12

30d calls4

30d payers2

MethodPOST

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

PASCAL (PFO-Associated Stroke Causal Likelihood; Kent 2021 JAMA Table 1) from a caller-assigned RoPE total (0-10; magent does not recompute RoPE) plus large-shunt and atrial-septal-aneurysm flags. high_rope is RoPE ≥7 (not >7). high_risk_pfo is large shunt and/or ASA. probable if both, possible if exactly one, unlikely if neither. Not a closure order, not RoPE, not ESUS. Trial ages 18-60 are a limitation. magent does not read echocardiography.

Tags: pascal · pfo · stroke · neurology · rope · bazaar

Call contract

Method: POST
Input: HTTP request
Output: json
Last paid call: 2026-10-12

Input example from Bazaar metadata

{
  "items": [
    {
      "atrial_septal_aneurysm": false,
      "large_shunt": true,
      "rope_score": 8
    },
    {
      "atrial_septal_aneurysm": false,
      "large_shunt": true,
      "rope_score": 8
    }
  ]
}

Output example

{
  "count": 2,
  "items": [
    {
      "citation": {
        "authors": "Kent DM, Saver JL, Kasner SE, Nelson J, Carroll JD, Chatellier G, Derumeaux G, Furlan AJ, Herrmann HC, Jüni P, Kim JS, Koethe B, Lee PH, Lefebvre B, Mattle HP, Meier B, Reisman M, Smalling RW, Soendergaard L, Song JK, Mas JL, Thaler DE",
        "doi": "10.1001/jama.2021.20956",
        "id": "kent-2021",
        "pmid": "34905030",
        "source": "JAMA. 2021;326(22):2277-2286",
        "title": "Heterogeneity of Treatment Effects in an Analysis of Pooled Individual Patient Data From Randomized Trials of Device Closure of Patent Foramen Ovale After Stroke"
      },
      "criteria": [
        {
          "factor": "high_rope",
          "met": true,
          "value": 8
        },
        {
          "factor": "high_risk_pfo",
          "met": true
        }
      ],
      "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": "pascal",
      "formula_expression": "high_rope iff rope_score >= 7; high_risk_pfo iff large_shunt or atrial_septal_aneurysm; probable iff both; possible iff exactly one; unlikely iff neither (Kent 2021 Table 1 PASCAL). magent does not recompute RoPE",
      "high_risk_pfo": true,
      "high_rope": true,
      "pascal_class": "probable",
      "rope_score": 8
    },
    {
      "citation": {
        "authors": "Kent DM, Saver JL, Kasner SE, Nelson J, Carroll JD, Chatellier G, Derumeaux G, Furlan AJ, Herrmann HC, Jüni P, Kim JS, Koethe B, Lee PH, Lefebvre B, Mattle HP, Meier B, Reisman M, Smalling RW, Soendergaard L, Song JK, Mas JL, Thaler DE",
        "doi": "10.1001/jama.2021.20956",
        "id": "kent-2021",
        "pmid": "34905030",
        "source": "JAMA. 2021;326(22):2277-2286",
        "title": "Heterogeneity of Treatment Effects in an Analysis of Pooled Individual Patient Data From Randomized Trials of Device Closure of Patent Foramen Ovale After Stroke"
      },
      "criteria": [
        {
          "factor": "high_rope",
          "met": true,
          "value": 8
        },
        {
          "factor": "high_risk_pfo",
          "met": true
        }
      ],
      "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": "pascal",
      "formula_expression": "high_rope iff rope_score >= 7; high_risk_pfo iff large_shunt or atrial_septal_aneurysm; probable iff both; possible iff exactly one; unlikely iff neither (Kent 2021 Table 1 PASCAL). magent does not recompute RoPE",
      "high_risk_pfo": true,
      "high_rope": true,
      "pascal_class": "probable",
      "rope_score": 8
    }
  ],
  "path": "/api/calc/pascal"
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/39473.json for the price and payment options.
Pay. Call GET https://api.magentlab.com/api/calc/pascal. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.005 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base
Demand: 4 calls · 2 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.005	0x836Be278f1739fB4308091cD1852F7971Bc19Ee2	600s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "amountUsd": 0.005,
    "maxTimeoutSeconds": 600
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

Example shape — generated from the schema, not a captured live response

{
  "example": {},
  "type": "string"
}

Examples

curl

curl "https://api.magentlab.com/api/calc/pascal"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://api.magentlab.com/api/calc/pascal");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://api.magentlab.com/api/calc/pascal")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: api.magentlab.com
Endpoint: https://api.magentlab.com/api/calc/pascal
Machine-readable: /resources/39473.json