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TIMI risk score for STEMI

Compute the TIMI risk score for ST-elevation myocardial infarction from published bedside factors at presentation.

LIVE $0.005 USDC GET /api/calc/timi_stemi

Markdown: /docs/timi-stemi.md · Canonical: https://magentlab.com/docs/timi-stemi

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

What it computes

Compute the TIMI risk score for ST-elevation myocardial infarction from published bedside factors at presentation.

When to use

When an agent needs the Morrow 2000 TIMI STEMI arithmetic and must not invent points from a chart narrative.

When not to use

Not a reperfusion or fibrinolytic protocol. The response is the integer score and components, not a mortality percent or treatment recommendation.
Age 65–74 and age ≥75 are mutually exclusive. Killip class, anterior ST elevation or LBBB, and time to treatment are caller-assigned; magent does not read an ECG or compute timestamps.
Diabetes, hypertension, or angina history contribute one point if any is true (not additive).

Formula

TIMI STEMI = age 65-74 (2) or age >=75 (3) + diabetes/hypertension/angina (1) + SBP<100 (3) + HR>100 (2) + Killip II-IV (2) + weight<67 kg (1) + anterior STE or LBBB (1) + time to treatment >4 h (1); max 14

Citation

Title: TIMI risk score for ST-elevation myocardial infarction: A convenient, bedside, clinical score for risk assessment at presentation
Authors: Morrow DA, Antman EM, Charlesworth A, Cairns R, Murphy SA, de Lemos JA, Giugliano RP, McCabe CH, Braunwald E
Source: Circulation. 2000;102(17):2031-2037
DOI: 10.1161/01.CIR.102.17.2031

Worked example

All-negative adult

Given: age=50angina=falseanterior_ste_or_lbbb=falsediabetes=falseheart_rate_bpm=70hypertension=falsekillip_class=1systolic_mm_hg=120time_to_treatment_gt_4h=falseweight_kg=80

Age 50 (<65) → 0; no diabetes/hypertension/angina; SBP 120 (≥100); HR 70 (≤100); Killip I; weight 80 kg (≥67); no anterior STE/LBBB; time to treatment not >4 h
Score = 0

Try

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

/api/calc/timi_stemi?age=50&diabetes=false&hypertension=false&angina=false&systolic_mm_hg=120&heart_rate_bpm=70&killip_class=1&weight_kg=80&anterior_ste_or_lbbb=false&time_to_treatment_gt_4h=false

Full URL: https://api.magentlab.com/api/calc/timi_stemi?age=50&diabetes=false&hypertension=false&angina=false&systolic_mm_hg=120&heart_rate_bpm=70&killip_class=1&weight_kg=80&anterior_ste_or_lbbb=false&time_to_treatment_gt_4h=false

x402 V2 curl

Expect HTTP 402 and a PAYMENT-REQUIRED header until you retry with PAYMENT-SIGNATURE. Incomplete query params return HTTP 400 before any quote or charge. HTTP 503 after a signature: retry the same PAYMENT-SIGNATURE — that is not a new 402.

curl -i -H "Accept: application/json" "https://api.magentlab.com/api/calc/timi_stemi?age=50&diabetes=false&hypertension=false&angina=false&systolic_mm_hg=120&heart_rate_bpm=70&killip_class=1&weight_kg=80&anterior_ste_or_lbbb=false&time_to_treatment_gt_4h=false"

Cursor mcp.json

Intended config for @magent/mcp. This is not npm @x402/fetch (a payment fetch wrapper).

{
  "mcpServers": {
    "magent": {
      "args": [
        "-y",
        "@magent/mcp"
      ],
      "command": "npx",
      "env": {
        "X402_PRIVATE_KEY": "0xYOUR_SPENDING_KEY"
      }
    }
  }
}

Parameters

Name	Type	Required	Description
`age`	integer	required	Age in years (18-120). 65-74 scores 2; ≥75 scores 3. Bands are exclusive.
`diabetes`	boolean	required	Diabetes mellitus. true or false. Diabetes, hypertension, or angina scores 1 if any is true.
`hypertension`	boolean	required	Hypertension history. true or false.
`angina`	boolean	required	Angina history. true or false.
`systolic_mm_hg`	number	required	Systolic BP in mm Hg (50-250). Scores 3 when <100; 100 is negative.
`heart_rate_bpm`	integer	required	Heart rate in beats per minute (integer 30-220). Scores 2 when >100; 100 is negative.
`killip_class`	integer	required	Killip class 1-4. Classes II-IV score 2; class I scores 0. Caller-assigned.
`weight_kg`	number	optional	Weight in kilograms. Provide weight_kg or weight_lb. Scores 1 when <67 kg; 67 is negative.
`weight_lb`	number	optional	Weight in pounds. Converted to kg; the <67 kg cutoff is applied in kg.
`anterior_ste_or_lbbb`	boolean	required	Anterior ST elevation or LBBB. true or false. Caller-assigned; magent does not read tracings.
`time_to_treatment_gt_4h`	boolean	required	Time to treatment >4 hours. true or false. Caller-assigned; magent does not parse timestamps.

Bulk (POST)

POST the same path with a JSON items array. Price is n times the GET unit. Invalid items return HTTP 400 before settlement.

POST /api/calc/timi_stemi Max 25 unit_amount * n PREVIEW

1 to 25 items. Each item uses the same keys as the GET query parameters.
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": "50",
      "angina": "false",
      "anterior_ste_or_lbbb": "false",
      "diabetes": "false",
      "heart_rate_bpm": "70",
      "hypertension": "false",
      "killip_class": "1",
      "systolic_mm_hg": "120",
      "time_to_treatment_gt_4h": "false",
      "weight_kg": "80"
    },
    {
      "age": "50",
      "angina": "false",
      "anterior_ste_or_lbbb": "false",
      "diabetes": "false",
      "heart_rate_bpm": "70",
      "hypertension": "false",
      "killip_class": "1",
      "systolic_mm_hg": "120",
      "time_to_treatment_gt_4h": "false",
      "weight_kg": "80"
    }
  ]
}

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/timi_stemi",
  "items": [
    {
      "components": [
        {
          "value": 50,
          "factor": "age_65_74",
          "points": 0,
          "present": false
        },
        {
          "value": 50,
          "factor": "age_ge_75",
          "points": 0,
          "present": false
        },
        {
          "factor": "history_cad_risk",
          "points": 0,
          "present": false
        },
        {
          "value": 120.0,
          "factor": "systolic_bp_lt_100",
          "points": 0,
          "present": false
        },
        {
          "value": 70,
          "factor": "heart_rate_gt_100",
          "points": 0,
          "present": false
        },
        {
          "value": 1,
          "factor": "killip_ii_iv",
          "points": 0,
          "present": false
        },
        {
          "value": 80.0,
          "factor": "weight_lt_67",
          "points": 0,
          "present": false
        },
        {
          "factor": "anterior_ste_or_lbbb",
          "points": 0,
          "present": false
        },
        {
          "factor": "time_to_treatment_gt_4h",
          "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": "Morrow DA, Antman EM, Charlesworth A, Cairns R, Murphy SA, de Lemos JA, Giugliano RP, McCabe CH, Braunwald E",
        "doi": "10.1161/01.CIR.102.17.2031",
        "id": "morrow-2000",
        "source": "Circulation. 2000;102(17):2031-2037",
        "title": "TIMI risk score for ST-elevation myocardial infarction: A convenient, bedside, clinical score for risk assessment at presentation"
      },
      "formula": "timi_stemi",
      "formula_expression": "TIMI STEMI = age 65-74 (2) or age >=75 (3) + diabetes/hypertension/angina (1) + SBP<100 (3) + HR>100 (2) + Killip II-IV (2) + weight<67 kg (1) + anterior STE or LBBB (1) + time to treatment >4 h (1); max 14",
      "weight_kg": 80.0,
      "age_years": 50,
      "max_score": 14,
      "score": 0,
      "heart_rate_bpm": 70,
      "systolic_mm_hg": 120.0,
      "angina": false,
      "anterior_ste_or_lbbb": false,
      "diabetes": false,
      "history_cad_risk": false,
      "hypertension": false,
      "killip_class": 1,
      "time_to_treatment_gt_4h": false
    },
    {
      "components": [
        {
          "value": 50,
          "factor": "age_65_74",
          "points": 0,
          "present": false
        },
        {
          "value": 50,
          "factor": "age_ge_75",
          "points": 0,
          "present": false
        },
        {
          "factor": "history_cad_risk",
          "points": 0,
          "present": false
        },
        {
          "value": 120.0,
          "factor": "systolic_bp_lt_100",
          "points": 0,
          "present": false
        },
        {
          "value": 70,
          "factor": "heart_rate_gt_100",
          "points": 0,
          "present": false
        },
        {
          "value": 1,
          "factor": "killip_ii_iv",
          "points": 0,
          "present": false
        },
        {
          "value": 80.0,
          "factor": "weight_lt_67",
          "points": 0,
          "present": false
        },
        {
          "factor": "anterior_ste_or_lbbb",
          "points": 0,
          "present": false
        },
        {
          "factor": "time_to_treatment_gt_4h",
          "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": "Morrow DA, Antman EM, Charlesworth A, Cairns R, Murphy SA, de Lemos JA, Giugliano RP, McCabe CH, Braunwald E",
        "doi": "10.1161/01.CIR.102.17.2031",
        "id": "morrow-2000",
        "source": "Circulation. 2000;102(17):2031-2037",
        "title": "TIMI risk score for ST-elevation myocardial infarction: A convenient, bedside, clinical score for risk assessment at presentation"
      },
      "formula": "timi_stemi",
      "formula_expression": "TIMI STEMI = age 65-74 (2) or age >=75 (3) + diabetes/hypertension/angina (1) + SBP<100 (3) + HR>100 (2) + Killip II-IV (2) + weight<67 kg (1) + anterior STE or LBBB (1) + time to treatment >4 h (1); max 14",
      "weight_kg": 80.0,
      "age_years": 50,
      "max_score": 14,
      "score": 0,
      "heart_rate_bpm": 70,
      "systolic_mm_hg": 120.0,
      "angina": false,
      "anterior_ste_or_lbbb": false,
      "diabetes": false,
      "history_cad_risk": false,
      "hypertension": false,
      "killip_class": 1,
      "time_to_treatment_gt_4h": false
    }
  ]
}

Response

Field	Type	Description
`formula`	string	timi_stemi
`formula_expression`	string	Exact expression used
`score`	integer	Total points 0-14
`max_score`	integer	Always 14
`age_years`	integer	Age used for the 65-74 and ≥75 bands
`diabetes`	boolean	Diabetes flag used
`hypertension`	boolean	Hypertension flag used
`angina`	boolean	Angina flag used
`history_cad_risk`	boolean	true when diabetes, hypertension, or angina is true
`systolic_mm_hg`	number	Systolic BP used for the <100 cutoff
`heart_rate_bpm`	integer	Heart rate used for the >100 cutoff
`killip_class`	integer	Killip class 1-4 used
`weight_kg`	number	Normalized weight in kg
`anterior_ste_or_lbbb`	boolean	Anterior STE or LBBB flag used
`time_to_treatment_gt_4h`	boolean	Time to treatment >4 hours flag used
`components`	array	Per-factor points
`citation`	object	Circulation 2000 citation
`disclaimer`	string	Not-a-device notice

Example JSON

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

{
  "components": [
    {
      "value": 50,
      "factor": "age_65_74",
      "points": 0,
      "present": false
    },
    {
      "value": 50,
      "factor": "age_ge_75",
      "points": 0,
      "present": false
    },
    {
      "factor": "history_cad_risk",
      "points": 0,
      "present": false
    },
    {
      "value": 120.0,
      "factor": "systolic_bp_lt_100",
      "points": 0,
      "present": false
    },
    {
      "value": 70,
      "factor": "heart_rate_gt_100",
      "points": 0,
      "present": false
    },
    {
      "value": 1,
      "factor": "killip_ii_iv",
      "points": 0,
      "present": false
    },
    {
      "value": 80.0,
      "factor": "weight_lt_67",
      "points": 0,
      "present": false
    },
    {
      "factor": "anterior_ste_or_lbbb",
      "points": 0,
      "present": false
    },
    {
      "factor": "time_to_treatment_gt_4h",
      "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": "Morrow DA, Antman EM, Charlesworth A, Cairns R, Murphy SA, de Lemos JA, Giugliano RP, McCabe CH, Braunwald E",
    "doi": "10.1161/01.CIR.102.17.2031",
    "id": "morrow-2000",
    "source": "Circulation. 2000;102(17):2031-2037",
    "title": "TIMI risk score for ST-elevation myocardial infarction: A convenient, bedside, clinical score for risk assessment at presentation"
  },
  "formula": "timi_stemi",
  "formula_expression": "TIMI STEMI = age 65-74 (2) or age >=75 (3) + diabetes/hypertension/angina (1) + SBP<100 (3) + HR>100 (2) + Killip II-IV (2) + weight<67 kg (1) + anterior STE or LBBB (1) + time to treatment >4 h (1); max 14",
  "weight_kg": 80.0,
  "age_years": 50,
  "max_score": 14,
  "score": 0,
  "heart_rate_bpm": 70,
  "systolic_mm_hg": 120.0,
  "angina": false,
  "anterior_ste_or_lbbb": false,
  "diabetes": false,
  "history_cad_risk": false,
  "hypertension": false,
  "killip_class": 1,
  "time_to_treatment_gt_4h": false
}

Errors

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_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_heart_rate`	heart_rate_bpm must be an integer from 30 to 220 Returned before settlement; you are not charged.
400	`invalid_killip_class`	killip_class must be 1, 2, 3, or 4. Returned before settlement; you are not charged.
400	`invalid_weight`	weight_kg (1-500) or weight_lb (2-1100) is required 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.
402	`payment_required`	Missing or invalid PAYMENT-SIGNATURE; decode the PAYMENT-REQUIRED header
409	`payment_in_progress`	The same authorization nonce is already being settled; retry shortly
429	`rate_limited`	Too many requests from this client
503	`settlement_uncertain`	Settlement is unconfirmed; retry with the same PAYMENT-SIGNATURE
503	`settle_failed`	Settlement failed; retry with the same PAYMENT-SIGNATURE shortly
503	`facilitator_unavailable`	Payment facilitator unavailable
503	`facilitator_misconfigured`	Payment facilitator is not configured
503	`facilitator_unauthorized`	Payment facilitator rejected credentials
503	`ledger_unavailable`	Payment ledger unavailable
503	`payment_unavailable`	Payment processing unavailable

Related tools

TIMI UA/NSTEMI — Compute the TIMI risk score for unstable angina / NSTEMI from age and six caller-assigned flags.

Also searched as

TIMI STEMI
TIMI risk score STEMI
Morrow TIMI STEMI
TIMI ST-elevation MI
STEMI TIMI score

Payment

Required query parameters must be present and valid. 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.

Guarantees

Invalid query parameters return HTTP 400 before settlement. You are not charged.
Settlement finishes before the tool executes (paymentFlow upfront). 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.