MAGENT

Atrial fibrillation · LIVE

HAS-BLED calculator

HAS-BLED

Compute the HAS-BLED bleeding-risk score from discrete clinical flags.

LIVE $0.005 USDC GET /api/calc/has_bled

Markdown: /docs/has-bled.md · Canonical: https://magentlab.com/docs/has-bled

Not a medical device. Not a diagnosis, dose, or listing recommendation.

What it computes

Compute the HAS-BLED bleeding-risk score from discrete clinical flags.

When to use

When an agent needs AF bleeding-risk arithmetic and must not invent the point total from prose.

When not to use

  • Not a diagnosis and not a treatment or anticoagulation recommendation.
  • Labile INR and other flags are caller-supplied. magent does not read an INR time-in-range.

Formula

HAS-BLED = hypertension + abnormal_renal + abnormal_liver + stroke + bleeding + labile_inr + elderly(age>65) + drugs + alcohol; max 9

Citation

Title
A novel user-friendly score (HAS-BLED) to assess 1-year risk of major bleeding in patients with atrial fibrillation: the Euro Heart Survey
Authors
Pisters R, Lane DA, Nieuwlaat R, de Vos CB, Crijns HJ, Lip GYH
Source
Chest. 2010;138(5):1093-1100
DOI
10.1378/chest.10-0134

Worked example

Age 78, hypertension only

Given: abnormal_liver=falseabnormal_renal=falseage=78alcohol=falsebleeding=falsedrugs=falsehypertension=truelabile_inr=falsestroke=false

  1. Hypertension → 1; age >65 → 1
  2. Score = 2

Also searched as

  • HASBLED
  • HAS BLED score
  • Pisters bleeding score
  • AF bleed risk

Try

Opens the live endpoint. Unpaid browser requests show the paywall; agents should send Accept: application/json.

/api/calc/has_bled?age=78&hypertension=true&abnormal_renal=false&abnormal_liver=false&stroke=false&bleeding=false&labile_inr=false&drugs=false&alcohol=false

Full URL: https://api.magentlab.com/api/calc/has_bled?age=78&hypertension=true&abnormal_renal=false&abnormal_liver=false&stroke=false&bleeding=false&labile_inr=false&drugs=false&alcohol=false

Call

Expect HTTP 402 until you retry with PAYMENT-SIGNATURE. Incomplete query params return HTTP 400 before any quote or charge. 

curl -i -H "Accept: application/json" "https://api.magentlab.com/api/calc/has_bled?age=78&hypertension=true&abnormal_renal=false&abnormal_liver=false&stroke=false&bleeding=false&labile_inr=false&drugs=false&alcohol=false"

Parameters

Name Type Required Description
age integer required Age in years (18-120). Age >65 scores 1 (E).
hypertension boolean required Uncontrolled hypertension (H). true or false.
abnormal_renal boolean required Abnormal renal function (A). true or false.
abnormal_liver boolean required Abnormal liver function (A). true or false. Renal and liver each score 1.
stroke boolean required Prior stroke (S). true or false.
bleeding boolean required Bleeding history or predisposition (B). true or false.
labile_inr boolean required Labile INR (L). true or false.
drugs boolean required Concomitant antiplatelet or NSAID (D). true or false.
alcohol boolean required Alcohol excess (D). true or false. Drugs and alcohol each score 1.

Bulk (POST)

POST the same path with a JSON items array. The first item is the GET unit; each additional item is $0.002. Invalid items return HTTP 400 before settlement.

POST /api/calc/has_bled Max 25 unit_amount + extra_item_amount * (n - 1) extra $0.002 PREVIEW

  • 1 to 25 items. Each item uses the same keys as the GET query parameters.
  • POST of 1 item costs the same as GET. Lists longer than 25: chunk into multiple POSTs. Extra items still execute; do not pad dummy rows.
  • The first invalid item fails the whole request (index in the 400 JSON). You are not charged.
  • HTTP 200 is {count, path, items}. Each items[i] is the GET 200 body for that row.
  • Catalog misses (empty matches, found=false) stay paid 200s inside that slot.
  • x402 resource URL is this path plus n and body_sha256. Browsers that prefer text/html get the same paywall as GET; Pay retries POST with the same items.

Example request (fixture)

{
  "items": [
    {
      "abnormal_liver": "false",
      "abnormal_renal": "false",
      "age": "78",
      "alcohol": "false",
      "bleeding": "false",
      "drugs": "false",
      "hypertension": "true",
      "labile_inr": "false",
      "stroke": "false"
    },
    {
      "abnormal_liver": "false",
      "abnormal_renal": "false",
      "age": "78",
      "alcohol": "false",
      "bleeding": "false",
      "drugs": "false",
      "hypertension": "true",
      "labile_inr": "false",
      "stroke": "false"
    }
  ]
}

Open bulk paywall →

Opens a two-item fixture on the API host. Unpaid browsers get the same MetaMask paywall as GET; Pay retries POST with those items.

Example 200 (fixture)

{
  "count": 2,
  "path": "/api/calc/has_bled",
  "items": [
    {
      "components": [
        {
          "factor": "hypertension",
          "points": 1,
          "present": true
        },
        {
          "factor": "abnormal_renal",
          "points": 0,
          "present": false
        },
        {
          "factor": "abnormal_liver",
          "points": 0,
          "present": false
        },
        {
          "factor": "stroke",
          "points": 0,
          "present": false
        },
        {
          "factor": "bleeding",
          "points": 0,
          "present": false
        },
        {
          "factor": "labile_inr",
          "points": 0,
          "present": false
        },
        {
          "value": 78,
          "factor": "elderly_age_gt_65",
          "points": 1,
          "present": true
        },
        {
          "factor": "drugs",
          "points": 0,
          "present": false
        },
        {
          "factor": "alcohol",
          "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.",
      "citation": {
        "authors": "Pisters R, Lane DA, Nieuwlaat R, de Vos CB, Crijns HJ, Lip GYH",
        "doi": "10.1378/chest.10-0134",
        "id": "pisters-2010",
        "source": "Chest. 2010;138(5):1093-1100",
        "title": "A novel user-friendly score (HAS-BLED) to assess 1-year risk of major bleeding in patients with atrial fibrillation: the Euro Heart Survey"
      },
      "formula": "has_bled",
      "formula_expression": "HAS-BLED = hypertension + abnormal_renal + abnormal_liver + stroke + bleeding + labile_inr + elderly(age>65) + drugs + alcohol; max 9",
      "max_score": 9,
      "score": 2,
      "age_years": 78
    },
    {
      "components": [
        {
          "factor": "hypertension",
          "points": 1,
          "present": true
        },
        {
          "factor": "abnormal_renal",
          "points": 0,
          "present": false
        },
        {
          "factor": "abnormal_liver",
          "points": 0,
          "present": false
        },
        {
          "factor": "stroke",
          "points": 0,
          "present": false
        },
        {
          "factor": "bleeding",
          "points": 0,
          "present": false
        },
        {
          "factor": "labile_inr",
          "points": 0,
          "present": false
        },
        {
          "value": 78,
          "factor": "elderly_age_gt_65",
          "points": 1,
          "present": true
        },
        {
          "factor": "drugs",
          "points": 0,
          "present": false
        },
        {
          "factor": "alcohol",
          "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.",
      "citation": {
        "authors": "Pisters R, Lane DA, Nieuwlaat R, de Vos CB, Crijns HJ, Lip GYH",
        "doi": "10.1378/chest.10-0134",
        "id": "pisters-2010",
        "source": "Chest. 2010;138(5):1093-1100",
        "title": "A novel user-friendly score (HAS-BLED) to assess 1-year risk of major bleeding in patients with atrial fibrillation: the Euro Heart Survey"
      },
      "formula": "has_bled",
      "formula_expression": "HAS-BLED = hypertension + abnormal_renal + abnormal_liver + stroke + bleeding + labile_inr + elderly(age>65) + drugs + alcohol; max 9",
      "max_score": 9,
      "score": 2,
      "age_years": 78
    }
  ]
}

Response

Field Type Description
formula string has_bled
formula_expression string Exact expression used
score integer Total points 0-9
max_score integer Always 9
age_years integer Age used for the E criterion
components array Per-factor points
citation object Chest 2010 citation
disclaimer string Not-a-device notice

Example JSON

Machine form of the same example. Frozen fixture. Not a live lookup. 

{
  "components": [
    {
      "factor": "hypertension",
      "points": 1,
      "present": true
    },
    {
      "factor": "abnormal_renal",
      "points": 0,
      "present": false
    },
    {
      "factor": "abnormal_liver",
      "points": 0,
      "present": false
    },
    {
      "factor": "stroke",
      "points": 0,
      "present": false
    },
    {
      "factor": "bleeding",
      "points": 0,
      "present": false
    },
    {
      "factor": "labile_inr",
      "points": 0,
      "present": false
    },
    {
      "value": 78,
      "factor": "elderly_age_gt_65",
      "points": 1,
      "present": true
    },
    {
      "factor": "drugs",
      "points": 0,
      "present": false
    },
    {
      "factor": "alcohol",
      "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.",
  "citation": {
    "authors": "Pisters R, Lane DA, Nieuwlaat R, de Vos CB, Crijns HJ, Lip GYH",
    "doi": "10.1378/chest.10-0134",
    "id": "pisters-2010",
    "source": "Chest. 2010;138(5):1093-1100",
    "title": "A novel user-friendly score (HAS-BLED) to assess 1-year risk of major bleeding in patients with atrial fibrillation: the Euro Heart Survey"
  },
  "formula": "has_bled",
  "formula_expression": "HAS-BLED = hypertension + abnormal_renal + abnormal_liver + stroke + bleeding + labile_inr + elderly(age>65) + drugs + alcohol; max 9",
  "max_score": 9,
  "score": 2,
  "age_years": 78
}

Client errors (HTTP 400)

Invalid params return 400 without charge. Shared HTTP 402 and 503 meanings: Payments.

HTTP Code When
400 invalid_age age must be an integer from 18 to 120 Returned before settlement; you are not charged.
400 invalid_flag boolean clinical flags must be true or false Returned before settlement; you are not charged.
400 invalid_items POST body must be a JSON object with only an items array Returned before settlement; you are not charged.
400 invalid_item_count items must be an array of 1 to 25 objects Returned before settlement; you are not charged.
400 invalid_item each items entry must be a JSON object Returned before settlement; you are not charged.

Related tools

  • CHA2DS2-VASc — Agents must not invent CHA2DS2-VASc from model memory. This endpoint computes the published Lip 2010 CHA2DS2-VASc stroke-risk score from discrete clinical flags; pay per request with x402 USDC on Base.

Payment

Unpaid requests return HTTP 402 even if query parameters or POST items are missing or invalid, so CDP and agents can index the path. After a PAYMENT-SIGNATURE, invalid params return HTTP 400 JSON before settlement. magent does not charge. Fix the params, then request a new 402 quote for that complete URL. Catalog misses (empty matches, found=false) are valid paid 200s. Unpaid valid requests return HTTP 402 with a base64 PAYMENT-REQUIRED header. HTTP 503 is not a new quote: retry the same PAYMENT-SIGNATURE. Full handshake and shared payment errors: Payments. Stdio MCP: /docs/mcp.

Guarantees

  • HTTP 402 is unpaid, including a missing query. After PAYMENT-SIGNATURE, invalid parameters return HTTP 400 before settlement. You are not charged. HTTP 402 never includes the tool JSON.
  • exact: settlement finishes before the tool (paymentFlow upfront). batch-settlement: verify/deposit before the tool; chargedCumulativeAmount commits after HTTP 2xx. Uncertain or failed settlement fails closed (HTTP 503). Retry the same PAYMENT-SIGNATURE.
  • HTTP 402 is unpaid only. Do not sign a second authorization because of a 503.
  • Execution is timeout-bounded and concurrency-capped.
  • Calculator inputs are stored encrypted for allowlisted operators (Magent Console). They are not in public logs, SSH lookups, catalog, or rollups. Request logs store path without query.