GI · LIVE

HAPS

Apply the Lankisch 2009 harmless acute pancreatitis score and return whether the three published criteria all hold (haps_harmless).

LIVE $0.005 USDC GET /api/calc/haps

Markdown: /docs/haps.md · Canonical: https://magentlab.com/docs/haps

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

What it computes

Apply the Lankisch 2009 harmless acute pancreatitis score and return whether the three published criteria all hold (haps_harmless).

When to use

When an agent already has rebound tenderness and/or guarding, hematocrit, and serum creatinine assigned as normal or not, as in Lankisch 2009, and needs the published harmless result. magent does not measure hematocrit or creatinine.

When not to use

• Not a medical device.
• Not a discharge order. Harmless on HAPS is not an instruction to discharge.
• Not a diagnosis. magent does not diagnose pancreatitis or grade severity beyond the published Lankisch 2009 algorithm.
• The caller assigns rebound tenderness and/or guarding as already determined. magent does not examine the abdomen.
• magent does not measure hematocrit or serum creatinine. hematocrit_normal and creatinine_normal are caller-assigned flags. This tool does not apply millimetre or sex cutoffs.

Formula

harmless iff no rebound tenderness and/or guarding and normal hematocrit and normal serum creatinine

Citation

Title

The harmless acute pancreatitis score: a clinical algorithm for rapid initial stratification of nonsevere disease

Authors

Lankisch PG, Weber-Dany B, Hebel K, Maisonneuve P, Lowenfels AB

Source

Clin Gastroenterol Hepatol. 2009;7(6):702-705

DOI

10.1016/j.cgh.2009.02.020

Worked example

Also searched as

• HAPS
• harmless acute pancreatitis score
• Lankisch HAPS
• Lankisch 2009
• harmless pancreatitis score
• HAPS pancreatitis
• harmless AP score

Try

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

/api/calc/haps?rebound_or_guarding=false&hematocrit_normal=true&creatinine_normal=true

Full URL: https://api.magentlab.com/api/calc/haps?rebound_or_guarding=false&hematocrit_normal=true&creatinine_normal=true

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/haps?rebound_or_guarding=false&hematocrit_normal=true&creatinine_normal=true"

Parameters

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/haps 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": [
    {
      "creatinine_normal": "true",
      "hematocrit_normal": "true",
      "rebound_or_guarding": "false"
    },
    {
      "creatinine_normal": "true",
      "hematocrit_normal": "true",
      "rebound_or_guarding": "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/haps",
  "items": [
    {
      "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": "Lankisch PG, Weber-Dany B, Hebel K, Maisonneuve P, Lowenfels AB",
        "doi": "10.1016/j.cgh.2009.02.020",
        "id": "lankisch-2009",
        "pmid": "19245846",
        "source": "Clin Gastroenterol Hepatol. 2009;7(6):702-705",
        "title": "The harmless acute pancreatitis score: a clinical algorithm for rapid initial stratification of nonsevere disease"
      },
      "formula": "haps",
      "formula_expression": "harmless iff no rebound tenderness and/or guarding and normal hematocrit and normal serum creatinine",
      "criteria": [
        {
          "factor": "no_rebound_or_guarding",
          "met": true
        },
        {
          "factor": "hematocrit_normal",
          "met": true
        },
        {
          "factor": "creatinine_normal",
          "met": true
        }
      ],
      "haps_harmless": 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.",
      "citation": {
        "authors": "Lankisch PG, Weber-Dany B, Hebel K, Maisonneuve P, Lowenfels AB",
        "doi": "10.1016/j.cgh.2009.02.020",
        "id": "lankisch-2009",
        "pmid": "19245846",
        "source": "Clin Gastroenterol Hepatol. 2009;7(6):702-705",
        "title": "The harmless acute pancreatitis score: a clinical algorithm for rapid initial stratification of nonsevere disease"
      },
      "formula": "haps",
      "formula_expression": "harmless iff no rebound tenderness and/or guarding and normal hematocrit and normal serum creatinine",
      "criteria": [
        {
          "factor": "no_rebound_or_guarding",
          "met": true
        },
        {
          "factor": "hematocrit_normal",
          "met": true
        },
        {
          "factor": "creatinine_normal",
          "met": true
        }
      ],
      "haps_harmless": true
    }
  ]
}

Response

Example JSON

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

{
  "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": "Lankisch PG, Weber-Dany B, Hebel K, Maisonneuve P, Lowenfels AB",
    "doi": "10.1016/j.cgh.2009.02.020",
    "id": "lankisch-2009",
    "pmid": "19245846",
    "source": "Clin Gastroenterol Hepatol. 2009;7(6):702-705",
    "title": "The harmless acute pancreatitis score: a clinical algorithm for rapid initial stratification of nonsevere disease"
  },
  "formula": "haps",
  "formula_expression": "harmless iff no rebound tenderness and/or guarding and normal hematocrit and normal serum creatinine",
  "criteria": [
    {
      "factor": "no_rebound_or_guarding",
      "met": true
    },
    {
      "factor": "hematocrit_normal",
      "met": true
    },
    {
      "factor": "creatinine_normal",
      "met": true
    }
  ],
  "haps_harmless": true
}

Client errors (HTTP 400)

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

Related tools

• Ranson — Sum the eleven Ranson 1974 prognostic signs (five at admission, six during the first 48 hours) and return the published mortality band.
• Glasgow-Imrie — Sum the eight Blamey 1984 Glasgow-Imrie factors and return whether severe pancreatitis is predicted (three or more factors).
• BISAP — Compute the Wu 2008 BISAP score for early prediction of mortality in acute pancreatitis from BUN, caller-assigned impaired mental status, caller-assigned SIRS, age, and caller-assigned pleural effusion.

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.
• 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.