Kidney · LIVE

AKIN staging

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.

LIVE $0.005 USDC GET /api/calc/akin

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

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

What it computes

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.

When to use

When an agent already has baseline and current serum creatinine in mg/dL and a caller-assigned AKIN urine-output category (or an RRT flag) and needs the published AKIN stage. magent does not assay creatinine or measure urine. Not KDIGO 2012 and not RIFLE.

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.
• The 48-hour window in Mehta 2007 is caller-applied; magent does not collect observation time.
• This tool is Mehta 2007 Table 2 AKIN staging only. Not KDIGO 2012 and not RIFLE. It does not report mortality bands.

Formula

AKIN stage = max(creatinine_stage, urine_stage); RRT maps to stage 3. Creatinine vs baseline (unrounded mg/dL): stage 1 if increase ≥0.3 mg/dL or ratio 1.5–2.0; stage 2 if ratio >2.0 and ≤3.0; stage 3 if ratio >3.0 or (current ≥4.0 mg/dL and increase ≥0.5 mg/dL). Urine (caller-assigned): none → 0; oliguria_gt_6h → 1; oliguria_gt_12h → 2; oliguria_24h_or_anuria_12h → 3. Stage 0 if neither criterion and RRT is false (Mehta 2007 Table 2)

Citation

Title

Acute Kidney Injury Network: report of an initiative to improve outcomes in acute kidney injury

Authors

Mehta RL, Kellum JA, Shah SV, et al

Source

Crit Care. 2007;11(2):R31

DOI

10.1186/cc5713

Worked example

Also searched as

• AKIN
• AKIN staging
• Acute Kidney Injury Network
• AKIN creatinine stage
• Mehta 2007 AKI
• AKIN urine output
• AKIN RRT stage 3
• acute kidney injury stage

Try

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

/api/calc/akin?baseline_creatinine_mg_dl=1.0&current_creatinine_mg_dl=1.0&urine_output=none&rrt=false

Full URL: https://api.magentlab.com/api/calc/akin?baseline_creatinine_mg_dl=1.0&current_creatinine_mg_dl=1.0&urine_output=none&rrt=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/akin?baseline_creatinine_mg_dl=1.0&current_creatinine_mg_dl=1.0&urine_output=none&rrt=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/akin 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",
      "rrt": "false",
      "urine_output": "none"
    },
    {
      "baseline_creatinine_mg_dl": "1.0",
      "current_creatinine_mg_dl": "1.0",
      "rrt": "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/akin",
  "items": [
    {
      "components": [
        {
          "value": 0,
          "factor": "creat_stage",
          "met": false
        },
        {
          "value": 0,
          "factor": "uo_stage",
          "met": false
        }
      ],
      "stage": 0,
      "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": "Mehta RL, Kellum JA, Shah SV, et al",
        "doi": "10.1186/cc5713",
        "id": "mehta-2007",
        "pmid": "17331245",
        "source": "Crit Care. 2007;11(2):R31",
        "title": "Acute Kidney Injury Network: report of an initiative to improve outcomes in acute kidney injury"
      },
      "formula": "akin",
      "formula_expression": "AKIN stage = max(creatinine_stage, urine_stage); RRT maps to stage 3. Creatinine vs baseline (unrounded mg/dL): stage 1 if increase ≥0.3 mg/dL or ratio 1.5–2.0; stage 2 if ratio >2.0 and ≤3.0; stage 3 if ratio >3.0 or (current ≥4.0 mg/dL and increase ≥0.5 mg/dL). Urine (caller-assigned): none → 0; oliguria_gt_6h → 1; oliguria_gt_12h → 2; oliguria_24h_or_anuria_12h → 3. Stage 0 if neither criterion and RRT is false (Mehta 2007 Table 2)",
      "baseline_creatinine_mg_dl": 1.0,
      "creat_stage": 0,
      "current_creatinine_mg_dl": 1.0,
      "rrt": false,
      "uo_stage": 0,
      "urine_output": "none"
    },
    {
      "components": [
        {
          "value": 0,
          "factor": "creat_stage",
          "met": false
        },
        {
          "value": 0,
          "factor": "uo_stage",
          "met": false
        }
      ],
      "stage": 0,
      "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": "Mehta RL, Kellum JA, Shah SV, et al",
        "doi": "10.1186/cc5713",
        "id": "mehta-2007",
        "pmid": "17331245",
        "source": "Crit Care. 2007;11(2):R31",
        "title": "Acute Kidney Injury Network: report of an initiative to improve outcomes in acute kidney injury"
      },
      "formula": "akin",
      "formula_expression": "AKIN stage = max(creatinine_stage, urine_stage); RRT maps to stage 3. Creatinine vs baseline (unrounded mg/dL): stage 1 if increase ≥0.3 mg/dL or ratio 1.5–2.0; stage 2 if ratio >2.0 and ≤3.0; stage 3 if ratio >3.0 or (current ≥4.0 mg/dL and increase ≥0.5 mg/dL). Urine (caller-assigned): none → 0; oliguria_gt_6h → 1; oliguria_gt_12h → 2; oliguria_24h_or_anuria_12h → 3. Stage 0 if neither criterion and RRT is false (Mehta 2007 Table 2)",
      "baseline_creatinine_mg_dl": 1.0,
      "creat_stage": 0,
      "current_creatinine_mg_dl": 1.0,
      "rrt": false,
      "uo_stage": 0,
      "urine_output": "none"
    }
  ]
}

Response

Example JSON

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

{
  "components": [
    {
      "value": 0,
      "factor": "creat_stage",
      "met": false
    },
    {
      "value": 0,
      "factor": "uo_stage",
      "met": false
    }
  ],
  "stage": 0,
  "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": "Mehta RL, Kellum JA, Shah SV, et al",
    "doi": "10.1186/cc5713",
    "id": "mehta-2007",
    "pmid": "17331245",
    "source": "Crit Care. 2007;11(2):R31",
    "title": "Acute Kidney Injury Network: report of an initiative to improve outcomes in acute kidney injury"
  },
  "formula": "akin",
  "formula_expression": "AKIN stage = max(creatinine_stage, urine_stage); RRT maps to stage 3. Creatinine vs baseline (unrounded mg/dL): stage 1 if increase ≥0.3 mg/dL or ratio 1.5–2.0; stage 2 if ratio >2.0 and ≤3.0; stage 3 if ratio >3.0 or (current ≥4.0 mg/dL and increase ≥0.5 mg/dL). Urine (caller-assigned): none → 0; oliguria_gt_6h → 1; oliguria_gt_12h → 2; oliguria_24h_or_anuria_12h → 3. Stage 0 if neither criterion and RRT is false (Mehta 2007 Table 2)",
  "baseline_creatinine_mg_dl": 1.0,
  "creat_stage": 0,
  "current_creatinine_mg_dl": 1.0,
  "rrt": false,
  "uo_stage": 0,
  "urine_output": "none"
}

Client errors (HTTP 400)

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

Related tools

• Cockcroft–Gault CrCl — Compute Cockcroft–Gault creatinine clearance in mL/min using total body weight.

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.