Kidney · LIVE

RIFLE criteria

RIFLE

Apply Bellomo 2004 Fig. 1 RIFLE classification and return the worse of the creatinine and urine-output limbs (none, risk, injury, failure), with persistent ARF beyond 4 weeks mapping to loss and ESRD beyond 3 months mapping to esrd.

LIVE $0.005 USDC GET /api/calc/rifle

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

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

What it computes

Apply Bellomo 2004 Fig. 1 RIFLE classification and return the worse of the creatinine and urine-output limbs (none, risk, injury, failure), with persistent ARF beyond 4 weeks mapping to loss and ESRD beyond 3 months mapping to esrd.

When to use

When an agent already has baseline and current serum creatinine in mg/dL, a caller-assigned RIFLE urine-output category, and optional Loss/ESRD duration flags, and needs the published RIFLE class. magent does not assay creatinine or measure urine. Not AKIN 2007 and not KDIGO 2012.

When not to use

• Not a medical device and not a diagnosis of acute kidney injury.
• magent does not assay creatinine or measure urine. baseline_creatinine_mg_dl and current_creatinine_mg_dl are caller-supplied in mg/dL only.
• urine_output is the caller-assigned published duration category. magent does not collect weight or urine volume.
• Loss and ESRD are caller-assigned duration flags; magent does not collect observation time.
• This tool is Bellomo 2004 Fig. 1 RIFLE classification only. Not AKIN 2007 and not KDIGO 2012. It does not estimate baseline creatinine with MDRD.

Formula

RIFLE class = esrd if ESRD >3 months, else loss if persistent ARF >4 weeks, else worse of creatinine vs urine (none < risk < injury < failure). Creatinine vs baseline (unrounded mg/dL): Failure if ratio ≥3.0 or (current ≥4.0 mg/dL and increase ≥0.5 mg/dL); Injury if ratio ≥2.0; Risk if ratio ≥1.5. GFR % decrease (Risk >25%, Injury >50%, Failure >75%) is equivalent to those creatinine multiples. Urine (caller-assigned): none → none; oliguria_gt_6h → Risk; oliguria_gt_12h → Injury; oliguria_24h_or_anuria_12h → Failure (Bellomo 2004 Fig. 1)

Citation

Title

Acute renal failure - definition, outcome measures, animal models, fluid therapy and information technology needs: the Second International Consensus Conference of the Acute Dialysis Quality Initiative (ADQI) Group

Authors

Bellomo R, Ronco C, Kellum JA, Mehta RL, Palevsky P, and the ADQI workgroup

Source

Crit Care. 2004;8(4):R204-R212

DOI

10.1186/cc2872

Worked example

Also searched as

• RIFLE
• RIFLE criteria
• RIFLE classification
• ADQI RIFLE
• Bellomo 2004 RIFLE
• RIFLE Risk Injury Failure
• RIFLE urine output
• acute renal failure RIFLE

Try

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

/api/calc/rifle?baseline_creatinine_mg_dl=1.0&current_creatinine_mg_dl=1.0&urine_output=none&persistent_arf_gt_4_weeks=false&esrd_gt_3_months=false

Full URL: https://api.magentlab.com/api/calc/rifle?baseline_creatinine_mg_dl=1.0&current_creatinine_mg_dl=1.0&urine_output=none&persistent_arf_gt_4_weeks=false&esrd_gt_3_months=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/rifle?baseline_creatinine_mg_dl=1.0&current_creatinine_mg_dl=1.0&urine_output=none&persistent_arf_gt_4_weeks=false&esrd_gt_3_months=false"

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/rifle 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": [
    {
      "baseline_creatinine_mg_dl": "1.0",
      "current_creatinine_mg_dl": "1.0",
      "esrd_gt_3_months": "false",
      "persistent_arf_gt_4_weeks": "false",
      "urine_output": "none"
    },
    {
      "baseline_creatinine_mg_dl": "1.0",
      "current_creatinine_mg_dl": "1.0",
      "esrd_gt_3_months": "false",
      "persistent_arf_gt_4_weeks": "false",
      "urine_output": "none"
    }
  ]
}

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/rifle",
  "items": [
    {
      "components": [
        {
          "value": "none",
          "factor": "creat_class",
          "met": false
        },
        {
          "value": "none",
          "factor": "uo_class",
          "met": 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": "Bellomo R, Ronco C, Kellum JA, Mehta RL, Palevsky P, and the ADQI workgroup",
        "doi": "10.1186/cc2872",
        "id": "bellomo-2004",
        "pmid": "15312219",
        "source": "Crit Care. 2004;8(4):R204-R212",
        "title": "Acute renal failure - definition, outcome measures, animal models, fluid therapy and information technology needs: the Second International Consensus Conference of the Acute Dialysis Quality Initiative (ADQI) Group"
      },
      "formula": "rifle",
      "formula_expression": "RIFLE class = esrd if ESRD >3 months, else loss if persistent ARF >4 weeks, else worse of creatinine vs urine (none < risk < injury < failure). Creatinine vs baseline (unrounded mg/dL): Failure if ratio ≥3.0 or (current ≥4.0 mg/dL and increase ≥0.5 mg/dL); Injury if ratio ≥2.0; Risk if ratio ≥1.5. GFR % decrease (Risk >25%, Injury >50%, Failure >75%) is equivalent to those creatinine multiples. Urine (caller-assigned): none → none; oliguria_gt_6h → Risk; oliguria_gt_12h → Injury; oliguria_24h_or_anuria_12h → Failure (Bellomo 2004 Fig. 1)",
      "baseline_creatinine_mg_dl": 1.0,
      "current_creatinine_mg_dl": 1.0,
      "urine_output": "none",
      "creat_class": "none",
      "esrd_gt_3_months": false,
      "persistent_arf_gt_4_weeks": false,
      "rifle_class": "none",
      "uo_class": "none"
    },
    {
      "components": [
        {
          "value": "none",
          "factor": "creat_class",
          "met": false
        },
        {
          "value": "none",
          "factor": "uo_class",
          "met": 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": "Bellomo R, Ronco C, Kellum JA, Mehta RL, Palevsky P, and the ADQI workgroup",
        "doi": "10.1186/cc2872",
        "id": "bellomo-2004",
        "pmid": "15312219",
        "source": "Crit Care. 2004;8(4):R204-R212",
        "title": "Acute renal failure - definition, outcome measures, animal models, fluid therapy and information technology needs: the Second International Consensus Conference of the Acute Dialysis Quality Initiative (ADQI) Group"
      },
      "formula": "rifle",
      "formula_expression": "RIFLE class = esrd if ESRD >3 months, else loss if persistent ARF >4 weeks, else worse of creatinine vs urine (none < risk < injury < failure). Creatinine vs baseline (unrounded mg/dL): Failure if ratio ≥3.0 or (current ≥4.0 mg/dL and increase ≥0.5 mg/dL); Injury if ratio ≥2.0; Risk if ratio ≥1.5. GFR % decrease (Risk >25%, Injury >50%, Failure >75%) is equivalent to those creatinine multiples. Urine (caller-assigned): none → none; oliguria_gt_6h → Risk; oliguria_gt_12h → Injury; oliguria_24h_or_anuria_12h → Failure (Bellomo 2004 Fig. 1)",
      "baseline_creatinine_mg_dl": 1.0,
      "current_creatinine_mg_dl": 1.0,
      "urine_output": "none",
      "creat_class": "none",
      "esrd_gt_3_months": false,
      "persistent_arf_gt_4_weeks": false,
      "rifle_class": "none",
      "uo_class": "none"
    }
  ]
}

Response

Example JSON

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

{
  "components": [
    {
      "value": "none",
      "factor": "creat_class",
      "met": false
    },
    {
      "value": "none",
      "factor": "uo_class",
      "met": 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": "Bellomo R, Ronco C, Kellum JA, Mehta RL, Palevsky P, and the ADQI workgroup",
    "doi": "10.1186/cc2872",
    "id": "bellomo-2004",
    "pmid": "15312219",
    "source": "Crit Care. 2004;8(4):R204-R212",
    "title": "Acute renal failure - definition, outcome measures, animal models, fluid therapy and information technology needs: the Second International Consensus Conference of the Acute Dialysis Quality Initiative (ADQI) Group"
  },
  "formula": "rifle",
  "formula_expression": "RIFLE class = esrd if ESRD >3 months, else loss if persistent ARF >4 weeks, else worse of creatinine vs urine (none < risk < injury < failure). Creatinine vs baseline (unrounded mg/dL): Failure if ratio ≥3.0 or (current ≥4.0 mg/dL and increase ≥0.5 mg/dL); Injury if ratio ≥2.0; Risk if ratio ≥1.5. GFR % decrease (Risk >25%, Injury >50%, Failure >75%) is equivalent to those creatinine multiples. Urine (caller-assigned): none → none; oliguria_gt_6h → Risk; oliguria_gt_12h → Injury; oliguria_24h_or_anuria_12h → Failure (Bellomo 2004 Fig. 1)",
  "baseline_creatinine_mg_dl": 1.0,
  "current_creatinine_mg_dl": 1.0,
  "urine_output": "none",
  "creat_class": "none",
  "esrd_gt_3_months": false,
  "persistent_arf_gt_4_weeks": false,
  "rifle_class": "none",
  "uo_class": "none"
}

Client errors (HTTP 400)

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

Related tools

• AKIN — Apply Mehta 2007 Table 2 AKIN staging and return stage 0-3 as the worse of the creatinine and urine-output limbs, with initiated renal replacement therapy mapping to stage 3.
• CKD-EPI 2021 eGFR — Agents must not invent eGFR from model memory. This endpoint computes published race-free CKD-EPI 2021 creatinine eGFR in mL/min/1.73m2; 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.