Pneumonia Severity Index (Fine / PORT)

PSI / PORT

Compute the Fine 1997 Pneumonia Severity Index (PORT) two-step risk class and Table 2 point total for community-acquired pneumonia.

WEDGE $0.005 USDC GET /api/calc/psi_port

Markdown: /docs/psi-port.md · Canonical: https://magentlab.com/docs/psi-port

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

What it computes

Compute the Fine 1997 Pneumonia Severity Index (PORT) two-step risk class and Table 2 point total for community-acquired pneumonia.

When to use

When an agent needs the published Fine 1997 PSI/PORT two-step class and Table 2 total and must not invent bands or skip Step 1.

When not to use

Not a medical device and not a site-of-care, admission, or treatment protocol.
Fine 1997 two-step rule only. Class I is assigned from Step 1 even when Table 2 points would map to class II–V. The Table 2 total is always returned.
Glucose is mg/dL only (Fine Table 2). magent does not convert mmol/L.
The caller assigns comorbidities, mental status, nursing-home status, and pleural effusion. magent does not examine the patient.
Not CURB-65 or CRB-65. Those are separate tools.

Formula

PSI/PORT two-step (Fine 1997): Class I if age<=50 and no neoplastic, liver, CHF, cerebrovascular, renal, AMS and HR<125, RR<30, SBP>=90, temp>=35 and <40; else Table 2 points: age (men) or age-10 (women) + nursing_home 10 + neoplastic 30 + liver 20 + CHF 10 + cerebrovascular 10 + renal 10 + AMS 20 + RR>=30 20 + SBP<90 20 + (temp<35 or >=40) 15 + HR>=125 10 + pH<7.35 30 + BUN>=30 20 + Na<130 20 + glucose>=250 10 + Hct<30 10 + PaO2<60 10 + pleural_effusion 10; class I from step 1 else 2 if <=70, 3 if 71-90, 4 if 91-130, 5 if >130

Citation

Title: A prediction rule to identify low-risk patients with community-acquired pneumonia
Authors: Fine MJ, Auble TE, Yealy DM, et al.
Source: N Engl J Med. 1997;336(4):243-250
DOI: 10.1056/NEJM199701233360402

Worked example

Age 45, male, all flags false, normal vitals and labs

Given: age=45altered_mental_status=falsearterial_ph=7.40bun_mg_dl=14cerebrovascular=falsechf=falseglucose_mg_dl=90heart_rate_bpm=80hematocrit_percent=42liver_disease=falseneoplastic=falsenursing_home=falsepao2_mm_hg=90pleural_effusion=falserenal_disease=falserespiratory_rate=16sex=malesodium_mmol_l=140systolic_mm_hg=120temperature_c=37.0

Age 45 ≤50, no neoplastic/liver/CHF/cerebrovascular/renal disease, no AMS, HR 80 <125, RR 16 <30, SBP 120 ≥90, temperature 37.0 is ≥35 and <40 → Step 1 Class I
Table 2: male age points = 45; remaining items absent
score = 45; risk_class = 1 (Class I, not class II from the ≤70 point cutoff)

Age 80, male, all other items absent (class III)

Given: age=80altered_mental_status=falsearterial_ph=7.40bun_mg_dl=14cerebrovascular=falsechf=falseglucose_mg_dl=90heart_rate_bpm=80hematocrit_percent=42liver_disease=falseneoplastic=falsenursing_home=falsepao2_mm_hg=90pleural_effusion=falserenal_disease=falserespiratory_rate=16sex=malesodium_mmol_l=140systolic_mm_hg=120temperature_c=37.0

Age 80 is not ≤50 → Step 2
Table 2: male age points = 80; remaining items absent
score = 80; risk_class = 3 (71–90)

Also searched as

psi
port
fine
cap
pneumonia severity
pneumonia severity index
Fine PSI
PORT score
PSI PORT

Try

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

/api/calc/psi_port?age=45&sex=male&nursing_home=false&neoplastic=false&liver_disease=false&chf=false&cerebrovascular=false&renal_disease=false&altered_mental_status=false&heart_rate_bpm=80&respiratory_rate=16&systolic_mm_hg=120&temperature_c=37.0&arterial_ph=7.40&bun_mg_dl=14&sodium_mmol_l=140&glucose_mg_dl=90&hematocrit_percent=42&pao2_mm_hg=90&pleural_effusion=false

Full URL: https://api.magentlab.com/api/calc/psi_port?age=45&sex=male&nursing_home=false&neoplastic=false&liver_disease=false&chf=false&cerebrovascular=false&renal_disease=false&altered_mental_status=false&heart_rate_bpm=80&respiratory_rate=16&systolic_mm_hg=120&temperature_c=37.0&arterial_ph=7.40&bun_mg_dl=14&sodium_mmol_l=140&glucose_mg_dl=90&hematocrit_percent=42&pao2_mm_hg=90&pleural_effusion=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/psi_port?age=45&sex=male&nursing_home=false&neoplastic=false&liver_disease=false&chf=false&cerebrovascular=false&renal_disease=false&altered_mental_status=false&heart_rate_bpm=80&respiratory_rate=16&systolic_mm_hg=120&temperature_c=37.0&arterial_ph=7.40&bun_mg_dl=14&sodium_mmol_l=140&glucose_mg_dl=90&hematocrit_percent=42&pao2_mm_hg=90&pleural_effusion=false"

Parameters

Name	Type	Required	Description
`age`	integer	required	Age in years (18-120). Table 2: men add the age integer; women add age − 10. Step 1 Class I requires age ≤50 (Fine: 50 years of age or younger).
`sex`	string	required	Sex (female or male). Women subtract 10 from the age points.
`nursing_home`	boolean	required	Nursing home resident as assigned by the caller. true or false. Table 2 +10 if true. Not a Step 1 Class I item.
`neoplastic`	boolean	required	Neoplastic disease as assigned by the caller. true or false. Step 1 excludes Class I if true. Table 2 +30 if true.
`liver_disease`	boolean	required	Liver disease as assigned by the caller. true or false. Step 1 excludes Class I if true. Table 2 +20 if true.
`chf`	boolean	required	Congestive heart failure as assigned by the caller. true or false. Step 1 excludes Class I if true. Table 2 +10 if true.
`cerebrovascular`	boolean	required	Cerebrovascular disease as assigned by the caller. true or false. Step 1 excludes Class I if true. Table 2 +10 if true.
`renal_disease`	boolean	required	Renal disease as assigned by the caller. true or false. Step 1 excludes Class I if true. Table 2 +10 if true.
`altered_mental_status`	boolean	required	Altered mental status as assigned by the caller. true or false. Step 1 excludes Class I if true. Table 2 +20 if true.
`heart_rate_bpm`	integer	required	Heart rate in beats per minute (integer 30-220). Step 1 Class I requires <125. Table 2 +10 when ≥125; 124 does not score.
`respiratory_rate`	integer	required	Respiratory rate in breaths/min (integer 4-80). Step 1 Class I requires <30. Table 2 +20 when ≥30; 29 does not score.
`systolic_mm_hg`	number	required	Systolic blood pressure in mm Hg (50-250). Step 1 Class I requires ≥90. Table 2 +20 when <90; 90 does not score.
`temperature_c`	number	required	Temperature in °C (30-45). Step 1 Class I requires ≥35 and <40. Table 2 +15 when <35 or ≥40; 35.0 and 39.9 do not score.
`arterial_ph`	number	required	Arterial pH (6.80-7.80). Table 2 +30 when <7.35; 7.35 does not score. Not a Step 1 Class I item.
`bun_mg_dl`	number	required	Blood urea nitrogen in mg/dL (1-200). Table 2 +20 when ≥30; 29.9 does not score. Not a Step 1 Class I item.
`sodium_mmol_l`	number	required	Serum sodium in mmol/L (110-160). Table 2 +20 when <130; 130 does not score. Not a Step 1 Class I item.
`glucose_mg_dl`	number	required	Serum glucose in mg/dL (50-1000). Fine Table 2 is mg/dL only. Table 2 +10 when ≥250; 249 does not score. Not a Step 1 Class I item.
`hematocrit_percent`	number	required	Hematocrit percent (10-70). Table 2 +10 when <30; 30 does not score. Not a Step 1 Class I item.
`pao2_mm_hg`	number	required	Arterial PaO2 in mm Hg (20-700). Table 2 +10 when <60; 60 does not score. Not a Step 1 Class I item.
`pleural_effusion`	boolean	required	Pleural effusion as assigned by the caller. true or false. Table 2 +10 if true. Not a Step 1 Class I item.

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/psi_port 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": [
    {
      "age": "45",
      "altered_mental_status": "false",
      "arterial_ph": "7.40",
      "bun_mg_dl": "14",
      "cerebrovascular": "false",
      "chf": "false",
      "glucose_mg_dl": "90",
      "heart_rate_bpm": "80",
      "hematocrit_percent": "42",
      "liver_disease": "false",
      "neoplastic": "false",
      "nursing_home": "false",
      "pao2_mm_hg": "90",
      "pleural_effusion": "false",
      "renal_disease": "false",
      "respiratory_rate": "16",
      "sex": "male",
      "sodium_mmol_l": "140",
      "systolic_mm_hg": "120",
      "temperature_c": "37.0"
    },
    {
      "age": "45",
      "altered_mental_status": "false",
      "arterial_ph": "7.40",
      "bun_mg_dl": "14",
      "cerebrovascular": "false",
      "chf": "false",
      "glucose_mg_dl": "90",
      "heart_rate_bpm": "80",
      "hematocrit_percent": "42",
      "liver_disease": "false",
      "neoplastic": "false",
      "nursing_home": "false",
      "pao2_mm_hg": "90",
      "pleural_effusion": "false",
      "renal_disease": "false",
      "respiratory_rate": "16",
      "sex": "male",
      "sodium_mmol_l": "140",
      "systolic_mm_hg": "120",
      "temperature_c": "37.0"
    }
  ]
}

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/psi_port",
  "items": [
    {
      "components": [
        {
          "value": 45,
          "factor": "age",
          "points": 45,
          "present": true
        },
        {
          "factor": "nursing_home",
          "points": 0,
          "present": false
        },
        {
          "factor": "neoplastic",
          "points": 0,
          "present": false
        },
        {
          "factor": "liver_disease",
          "points": 0,
          "present": false
        },
        {
          "factor": "chf",
          "points": 0,
          "present": false
        },
        {
          "factor": "cerebrovascular",
          "points": 0,
          "present": false
        },
        {
          "factor": "renal_disease",
          "points": 0,
          "present": false
        },
        {
          "factor": "altered_mental_status",
          "points": 0,
          "present": false
        },
        {
          "value": 16,
          "factor": "respiratory_rate_ge_30",
          "points": 0,
          "present": false
        },
        {
          "value": 120.0,
          "factor": "systolic_mm_hg_lt_90",
          "points": 0,
          "present": false
        },
        {
          "value": 37.0,
          "factor": "temperature_extreme",
          "points": 0,
          "present": false
        },
        {
          "value": 80,
          "factor": "heart_rate_ge_125",
          "points": 0,
          "present": false
        },
        {
          "value": 7.4,
          "factor": "arterial_ph_lt_7_35",
          "points": 0,
          "present": false
        },
        {
          "value": 14.0,
          "factor": "bun_ge_30",
          "points": 0,
          "present": false
        },
        {
          "value": 140.0,
          "factor": "sodium_lt_130",
          "points": 0,
          "present": false
        },
        {
          "value": 90.0,
          "factor": "glucose_ge_250",
          "points": 0,
          "present": false
        },
        {
          "value": 42.0,
          "factor": "hematocrit_lt_30",
          "points": 0,
          "present": false
        },
        {
          "value": 90.0,
          "factor": "pao2_lt_60",
          "points": 0,
          "present": false
        },
        {
          "factor": "pleural_effusion",
          "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": "Fine MJ, Auble TE, Yealy DM, et al.",
        "doi": "10.1056/NEJM199701233360402",
        "id": "fine-1997",
        "pmid": "8995086",
        "source": "N Engl J Med. 1997;336(4):243-250",
        "title": "A prediction rule to identify low-risk patients with community-acquired pneumonia"
      },
      "formula": "psi_port",
      "formula_expression": "PSI/PORT two-step (Fine 1997): Class I if age<=50 and no neoplastic, liver, CHF, cerebrovascular, renal, AMS and HR<125, RR<30, SBP>=90, temp>=35 and <40; else Table 2 points: age (men) or age-10 (women) + nursing_home 10 + neoplastic 30 + liver 20 + CHF 10 + cerebrovascular 10 + renal 10 + AMS 20 + RR>=30 20 + SBP<90 20 + (temp<35 or >=40) 15 + HR>=125 10 + pH<7.35 30 + BUN>=30 20 + Na<130 20 + glucose>=250 10 + Hct<30 10 + PaO2<60 10 + pleural_effusion 10; class I from step 1 else 2 if <=70, 3 if 71-90, 4 if 91-130, 5 if >130",
      "score": 45,
      "age_years": 45,
      "risk_class": 1
    },
    {
      "components": [
        {
          "value": 45,
          "factor": "age",
          "points": 45,
          "present": true
        },
        {
          "factor": "nursing_home",
          "points": 0,
          "present": false
        },
        {
          "factor": "neoplastic",
          "points": 0,
          "present": false
        },
        {
          "factor": "liver_disease",
          "points": 0,
          "present": false
        },
        {
          "factor": "chf",
          "points": 0,
          "present": false
        },
        {
          "factor": "cerebrovascular",
          "points": 0,
          "present": false
        },
        {
          "factor": "renal_disease",
          "points": 0,
          "present": false
        },
        {
          "factor": "altered_mental_status",
          "points": 0,
          "present": false
        },
        {
          "value": 16,
          "factor": "respiratory_rate_ge_30",
          "points": 0,
          "present": false
        },
        {
          "value": 120.0,
          "factor": "systolic_mm_hg_lt_90",
          "points": 0,
          "present": false
        },
        {
          "value": 37.0,
          "factor": "temperature_extreme",
          "points": 0,
          "present": false
        },
        {
          "value": 80,
          "factor": "heart_rate_ge_125",
          "points": 0,
          "present": false
        },
        {
          "value": 7.4,
          "factor": "arterial_ph_lt_7_35",
          "points": 0,
          "present": false
        },
        {
          "value": 14.0,
          "factor": "bun_ge_30",
          "points": 0,
          "present": false
        },
        {
          "value": 140.0,
          "factor": "sodium_lt_130",
          "points": 0,
          "present": false
        },
        {
          "value": 90.0,
          "factor": "glucose_ge_250",
          "points": 0,
          "present": false
        },
        {
          "value": 42.0,
          "factor": "hematocrit_lt_30",
          "points": 0,
          "present": false
        },
        {
          "value": 90.0,
          "factor": "pao2_lt_60",
          "points": 0,
          "present": false
        },
        {
          "factor": "pleural_effusion",
          "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": "Fine MJ, Auble TE, Yealy DM, et al.",
        "doi": "10.1056/NEJM199701233360402",
        "id": "fine-1997",
        "pmid": "8995086",
        "source": "N Engl J Med. 1997;336(4):243-250",
        "title": "A prediction rule to identify low-risk patients with community-acquired pneumonia"
      },
      "formula": "psi_port",
      "formula_expression": "PSI/PORT two-step (Fine 1997): Class I if age<=50 and no neoplastic, liver, CHF, cerebrovascular, renal, AMS and HR<125, RR<30, SBP>=90, temp>=35 and <40; else Table 2 points: age (men) or age-10 (women) + nursing_home 10 + neoplastic 30 + liver 20 + CHF 10 + cerebrovascular 10 + renal 10 + AMS 20 + RR>=30 20 + SBP<90 20 + (temp<35 or >=40) 15 + HR>=125 10 + pH<7.35 30 + BUN>=30 20 + Na<130 20 + glucose>=250 10 + Hct<30 10 + PaO2<60 10 + pleural_effusion 10; class I from step 1 else 2 if <=70, 3 if 71-90, 4 if 91-130, 5 if >130",
      "score": 45,
      "age_years": 45,
      "risk_class": 1
    }
  ]
}

Response

Field	Type	Description
`formula`	string	psi_port
`formula_expression`	string	Exact expression used
`score`	integer	Fine Table 2 point total (always returned, including Class I)
`risk_class`	integer	1 if Step 1 Class I; else 2 if score ≤70, 3 if 71-90, 4 if 91-130, 5 if >130
`age_years`	integer	Age used for Step 1 and Table 2
`components`	array	Per-factor Table 2 points
`citation`	object	Fine 1997 citation
`disclaimer`	string	Not-a-device notice

Example JSON

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

{
  "components": [
    {
      "value": 45,
      "factor": "age",
      "points": 45,
      "present": true
    },
    {
      "factor": "nursing_home",
      "points": 0,
      "present": false
    },
    {
      "factor": "neoplastic",
      "points": 0,
      "present": false
    },
    {
      "factor": "liver_disease",
      "points": 0,
      "present": false
    },
    {
      "factor": "chf",
      "points": 0,
      "present": false
    },
    {
      "factor": "cerebrovascular",
      "points": 0,
      "present": false
    },
    {
      "factor": "renal_disease",
      "points": 0,
      "present": false
    },
    {
      "factor": "altered_mental_status",
      "points": 0,
      "present": false
    },
    {
      "value": 16,
      "factor": "respiratory_rate_ge_30",
      "points": 0,
      "present": false
    },
    {
      "value": 120.0,
      "factor": "systolic_mm_hg_lt_90",
      "points": 0,
      "present": false
    },
    {
      "value": 37.0,
      "factor": "temperature_extreme",
      "points": 0,
      "present": false
    },
    {
      "value": 80,
      "factor": "heart_rate_ge_125",
      "points": 0,
      "present": false
    },
    {
      "value": 7.4,
      "factor": "arterial_ph_lt_7_35",
      "points": 0,
      "present": false
    },
    {
      "value": 14.0,
      "factor": "bun_ge_30",
      "points": 0,
      "present": false
    },
    {
      "value": 140.0,
      "factor": "sodium_lt_130",
      "points": 0,
      "present": false
    },
    {
      "value": 90.0,
      "factor": "glucose_ge_250",
      "points": 0,
      "present": false
    },
    {
      "value": 42.0,
      "factor": "hematocrit_lt_30",
      "points": 0,
      "present": false
    },
    {
      "value": 90.0,
      "factor": "pao2_lt_60",
      "points": 0,
      "present": false
    },
    {
      "factor": "pleural_effusion",
      "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": "Fine MJ, Auble TE, Yealy DM, et al.",
    "doi": "10.1056/NEJM199701233360402",
    "id": "fine-1997",
    "pmid": "8995086",
    "source": "N Engl J Med. 1997;336(4):243-250",
    "title": "A prediction rule to identify low-risk patients with community-acquired pneumonia"
  },
  "formula": "psi_port",
  "formula_expression": "PSI/PORT two-step (Fine 1997): Class I if age<=50 and no neoplastic, liver, CHF, cerebrovascular, renal, AMS and HR<125, RR<30, SBP>=90, temp>=35 and <40; else Table 2 points: age (men) or age-10 (women) + nursing_home 10 + neoplastic 30 + liver 20 + CHF 10 + cerebrovascular 10 + renal 10 + AMS 20 + RR>=30 20 + SBP<90 20 + (temp<35 or >=40) 15 + HR>=125 10 + pH<7.35 30 + BUN>=30 20 + Na<130 20 + glucose>=250 10 + Hct<30 10 + PaO2<60 10 + pleural_effusion 10; class I from step 1 else 2 if <=70, 3 if 71-90, 4 if 91-130, 5 if >130",
  "score": 45,
  "age_years": 45,
  "risk_class": 1
}

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_sex`	sex must be female or male 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_heart_rate`	heart_rate_bpm must be an integer from 30 to 220 Returned before settlement; you are not charged.
400	`invalid_respiratory_rate`	respiratory_rate must be an integer from 4 to 80. Returned before settlement; you are not charged.
400	`invalid_temperature`	temperature_c must be a number from 30.0 to 45.0. Returned before settlement; you are not charged.
400	`invalid_systolic_bp`	systolic_mm_hg or systolic_bp_mm_hg must be a number from 50 to 250. Returned before settlement; you are not charged.
400	`invalid_arterial_ph`	arterial_ph must be a number from 6.80 to 7.80. Returned before settlement; you are not charged.
400	`invalid_bun`	bun_mg_dl must be a number from 1 to 200. Returned before settlement; you are not charged.
400	`invalid_sodium`	sodium_mmol_l must be a number from 110 to 160 Returned before settlement; you are not charged.
400	`invalid_glucose`	glucose_mg_dl (50-1000) or glucose_mmol_l (2.8-55.5) is required Returned before settlement; you are not charged.
400	`invalid_hematocrit`	hematocrit_percent must be a number from 10 to 70. Returned before settlement; you are not charged.
400	`invalid_pao2`	pao2_mm_hg must be a number from 20 to 700. 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

CURB-65 — Compute the CURB-65 community-acquired pneumonia severity score from age and discrete flags.
CRB-65 — Compute the Lim 2003 CRB-65 community-acquired pneumonia score from age and caller-assigned confusion, respiratory-rate, and blood-pressure flags. Urea is not an input.

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.