# SCORE2-Diabetes 10-year CVD risk

SCORE2-Diabetes 10-year CVD risk

Status: LIVE
Price: $0.005 USDC
`GET /api/calc/score2_diabetes`
HTML: https://magentlab.com/docs/score2-diabetes
Markdown: https://magentlab.com/docs/score2-diabetes.md

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

## What it computes

Compute the ESC 2023 SCORE2-Diabetes 10-year fatal plus non-fatal CVD percent for adults aged 40-79 with type 2 diabetes from sex, current smoking, systolic blood pressure, total and HDL cholesterol, age at diabetes diagnosis, IFCC HbA1c, eGFR, and European geographic risk region.

## When to use

When an agent already has those SCORE2-Diabetes 2023 predictors for a person aged 40-79 with type 2 diabetes and no prior CVD and needs that paper's region-calibrated 10-year CVD percent. Not a diagnosis, statin order, SCORE2, or SCORE2-OP.

## When not to use

- Not a medical device. Not a diagnosis of cardiovascular disease. Not a statin order or treatment recommendation.
- SCORE2-Diabetes 2023 for type 2 diabetes, ages 40-79 only. Not SCORE2 (no diabetes-specific labs). Not SCORE2-OP. Not intended for people without diabetes or with prior CVD.
- european_risk_region is the paper's geographic calibration (low, moderate, high, very_high), not race or ethnicity.
- HbA1c is IFCC mmol/mol, not % DCCT. Caller assigns age, sex, smoking, blood pressure, lipids, diagnosis age, HbA1c, eGFR, and European risk region. magent does not assay lipids, HbA1c, or eGFR and does not measure blood pressure.

## Formula

```
10-year fatal+non-fatal CVD % = 100*(1-exp(-exp(scale1+scale2*ln(-ln(1-uncal))))); uncal=1-S0^exp(lp); cage=(age-60)/5; csbp=(SBP-120)/20; ctc=(TC-6)/1; chdl=(HDL-1.3)/0.5; cdiabage=(age_at_dx-50)/5; chba1c=(HbA1c_mmol_mol-31)/9.34; cegfr=(ln(eGFR)-4.5)/0.15; diabetes=1; men S0=0.9605 lp=0.5368*cage+0.4774*smoke+0.1322*csbp+0.6457*diabetes+0.1102*ctc-0.1087*chdl-0.0672*cage*smoke-0.0268*cage*csbp-0.0983*cage*diabetes-0.0181*cage*ctc+0.0095*cage*chdl-0.0998*diabetes*cdiabage+0.0955*chba1c-0.0591*cegfr+0.0058*cegfr^2-0.0134*cage*chba1c+0.0115*cage*cegfr; women S0=0.9776 lp=0.6624*cage+0.6139*smoke+0.1421*csbp+0.8096*diabetes+0.1127*ctc-0.1568*chdl-0.1122*cage*smoke-0.0167*cage*csbp-0.1272*cage*diabetes-0.0200*cage*ctc+0.0186*cage*chdl-0.118*diabetes*cdiabage+0.1173*chba1c-0.0640*cegfr+0.0062*cegfr^2-0.0196*cage*chba1c+0.0169*cage*cegfr; region scale1/scale2 SCORE2 age<70 and SCORE2-OP age 70-79; age 40-79; type 2 diabetes only; geographic region not race; not SCORE2; not SCORE2-OP
```

## Citation

[SCORE2-Diabetes: 10-year cardiovascular risk estimation in type 2 diabetes in Europe](https://doi.org/10.1093/eurheartj/ehad260)
SCORE2-Diabetes working group and ESC Cardiovascular risk collaboration
Eur Heart J. 2023;44(28):2544-2556
DOI: [10.1093/eurheartj/ehad260](https://doi.org/10.1093/eurheartj/ehad260)

## Worked example

### Moderate-risk region, male, age 60, nonsmoker, SBP 140, TC 5.5, HDL 1.3, HbA1c 50, eGFR 90, diagnosis age 60

Given: `age=60, age_at_diabetes_diagnosis=60, egfr_ml_min_1_73m2=90, european_risk_region=moderate, hba1c_mmol_mol=50, hdl_mmol_l=1.3, sbp_mm_hg=140, sex=male, smoker=false, total_cholesterol_mmol_l=5.5`

1. cage=0; csbp=1; ctc=-0.5; chdl=0; smoke=0; diabetes=1; cdiabage=2; chba1c=(50-31)/9.34; cegfr=0
2. men lp = 0.7175
3. uncal = 1-0.9605^exp(lp); moderate men scale1=-0.1565 scale2=0.8009
4. risk_10y_percent 11.0 (paper prints 11.0% for this man)


### Same man with adverse diabetes factors (HbA1c 70, eGFR 60, diagnosis age 50)

Given: `age=60, age_at_diabetes_diagnosis=50, egfr_ml_min_1_73m2=60, european_risk_region=moderate, hba1c_mmol_mol=70, hdl_mmol_l=1.3, sbp_mm_hg=140, sex=male, smoker=false, total_cholesterol_mmol_l=5.5`

1. cdiabage=0; chba1c=(70-31)/9.34; cegfr=(ln(60)-4.5)/0.15
2. men lp = 1.3238
3. risk_10y_percent 17.2 (paper prints 17.2%)


### Same two profiles, woman, moderate-risk region

Given: `age=60, age_at_diabetes_diagnosis=60, egfr_ml_min_1_73m2=90, european_risk_region=moderate, hba1c_mmol_mol=50, hdl_mmol_l=1.3, sbp_mm_hg=140, sex=female, smoker=false, total_cholesterol_mmol_l=5.5`

1. women S0=0.9776; typical lp 0.8981 risk_10y_percent 7.6
2. adverse lp 1.6036 risk_10y_percent 12.7 (paper prints 12.7%)


### Adverse-diabetes man in low and very-high regions

Given: `age=60, age_at_diabetes_diagnosis=50, egfr_ml_min_1_73m2=60, european_risk_region=low, hba1c_mmol_mol=70, hdl_mmol_l=1.3, sbp_mm_hg=140, sex=male, smoker=false, total_cholesterol_mmol_l=5.5`

1. Same lp 1.3238; low men scale1=-0.5699 scale2=0.7476 risk_10y_percent 12.9 (paper 12.9%)
2. very_high men scale1=0.5836 scale2=0.8294 risk_10y_percent 31.2 (paper 31.2%)


## Also searched as

- SCORE2-Diabetes
- ESC 2023 diabetes CVD risk
- 10-year CVD risk type 2 diabetes
- European risk region diabetes
- HbA1c eGFR cardiovascular risk
- SCORE2 diabetes age 40-79
- fatal and non-fatal CVD diabetes

## Parameters

- `age` (integer, required): Age in years (integer 40-79). SCORE2-Diabetes 2023 is for ages 40-79. Not SCORE2 (40-69 without diabetes labs). Not SCORE2-OP.
- `sex` (string, required): Sex used by the sex-specific SCORE2-Diabetes 2023 coefficients (female or male).
- `smoker` (boolean, required): Current cigarette smoking as assigned by the caller (true or false). magent does not take a smoking history.
- `sbp_mm_hg` (number, required): Systolic blood pressure in mm Hg (50-250). Enters as (SBP-120)/20. magent does not measure blood pressure.
- `total_cholesterol_mmol_l` (number, required): Total cholesterol in mmol/L (1.5-15). Enters as (TC-6). magent does not assay lipids.
- `hdl_mmol_l` (number, required): HDL cholesterol in mmol/L (0.4-4). Enters as (HDL-1.3)/0.5. magent does not assay lipids.
- `age_at_diabetes_diagnosis` (integer, required): Age at type 2 diabetes diagnosis in years (integer 1-79, not after current age). Enters as (age_at_dx-50)/5. Patient is assumed to have type 2 diabetes.
- `hba1c_mmol_mol` (number, required): HbA1c in IFCC mmol/mol (20-195), not % DCCT. Enters as (HbA1c-31)/9.34. magent does not assay HbA1c.
- `egfr_ml_min_1_73m2` (number, required): Caller-assigned eGFR in mL/min/1.73 m² (5-200). Enters as (ln(eGFR)-4.5)/0.15 plus the squared term. magent does not compute CKD-EPI.
- `european_risk_region` (string, required): Geographic SCORE2/SCORE2-OP calibration region (low, moderate, high, or very_high) as printed for SCORE2-Diabetes. Not race. Not ethnicity.

## 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.

Method: `POST /api/calc/score2_diabetes`
Max items: 25
Price: unit_amount + extra_item_amount * (n - 1) (unit 5000 atomic, extra 2000 atomic)
Status: 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:

```json
{
  "items": [
    {
      "age": "60",
      "age_at_diabetes_diagnosis": "60",
      "egfr_ml_min_1_73m2": "90",
      "european_risk_region": "moderate",
      "hba1c_mmol_mol": "50",
      "hdl_mmol_l": "1.3",
      "sbp_mm_hg": "140",
      "sex": "male",
      "smoker": "false",
      "total_cholesterol_mmol_l": "5.5"
    },
    {
      "age": "60",
      "age_at_diabetes_diagnosis": "60",
      "egfr_ml_min_1_73m2": "90",
      "european_risk_region": "moderate",
      "hba1c_mmol_mol": "50",
      "hdl_mmol_l": "1.3",
      "sbp_mm_hg": "140",
      "sex": "male",
      "smoker": "false",
      "total_cholesterol_mmol_l": "5.5"
    }
  ]
}
```

Human paywall (two-item fixture): https://api.magentlab.com/paywall/bulk/score2-diabetes

Example 200:

```json
{
  "count": 2,
  "path": "/api/calc/score2_diabetes",
  "items": [
    {
      "age": 60,
      "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": "SCORE2-Diabetes working group and ESC Cardiovascular risk collaboration",
        "doi": "10.1093/eurheartj/ehad260",
        "id": "score2-diabetes-2023",
        "pmid": "37247330",
        "source": "Eur Heart J. 2023;44(28):2544-2556",
        "title": "SCORE2-Diabetes: 10-year cardiovascular risk estimation in type 2 diabetes in Europe"
      },
      "formula": "score2_diabetes",
      "formula_expression": "10-year fatal+non-fatal CVD % = 100*(1-exp(-exp(scale1+scale2*ln(-ln(1-uncal))))); uncal=1-S0^exp(lp); cage=(age-60)/5; csbp=(SBP-120)/20; ctc=(TC-6)/1; chdl=(HDL-1.3)/0.5; cdiabage=(age_at_dx-50)/5; chba1c=(HbA1c_mmol_mol-31)/9.34; cegfr=(ln(eGFR)-4.5)/0.15; diabetes=1; men S0=0.9605 lp=0.5368*cage+0.4774*smoke+0.1322*csbp+0.6457*diabetes+0.1102*ctc-0.1087*chdl-0.0672*cage*smoke-0.0268*cage*csbp-0.0983*cage*diabetes-0.0181*cage*ctc+0.0095*cage*chdl-0.0998*diabetes*cdiabage+0.0955*chba1c-0.0591*cegfr+0.0058*cegfr^2-0.0134*cage*chba1c+0.0115*cage*cegfr; women S0=0.9776 lp=0.6624*cage+0.6139*smoke+0.1421*csbp+0.8096*diabetes+0.1127*ctc-0.1568*chdl-0.1122*cage*smoke-0.0167*cage*csbp-0.1272*cage*diabetes-0.0200*cage*ctc+0.0186*cage*chdl-0.118*diabetes*cdiabage+0.1173*chba1c-0.0640*cegfr+0.0062*cegfr^2-0.0196*cage*chba1c+0.0169*cage*cegfr; region scale1/scale2 SCORE2 age<70 and SCORE2-OP age 70-79; age 40-79; type 2 diabetes only; geographic region not race; not SCORE2; not SCORE2-OP",
      "sex": "male",
      "linear_predictor": 0.7175,
      "egfr_ml_min_1_73m2": 90.0,
      "sbp_mm_hg": 140.0,
      "smoker": false,
      "risk_10y_percent": 11.0,
      "european_risk_region": "moderate",
      "hdl_mmol_l": 1.3,
      "total_cholesterol_mmol_l": 5.5,
      "age_at_diabetes_diagnosis": 60,
      "hba1c_mmol_mol": 50.0
    },
    {
      "age": 60,
      "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": "SCORE2-Diabetes working group and ESC Cardiovascular risk collaboration",
        "doi": "10.1093/eurheartj/ehad260",
        "id": "score2-diabetes-2023",
        "pmid": "37247330",
        "source": "Eur Heart J. 2023;44(28):2544-2556",
        "title": "SCORE2-Diabetes: 10-year cardiovascular risk estimation in type 2 diabetes in Europe"
      },
      "formula": "score2_diabetes",
      "formula_expression": "10-year fatal+non-fatal CVD % = 100*(1-exp(-exp(scale1+scale2*ln(-ln(1-uncal))))); uncal=1-S0^exp(lp); cage=(age-60)/5; csbp=(SBP-120)/20; ctc=(TC-6)/1; chdl=(HDL-1.3)/0.5; cdiabage=(age_at_dx-50)/5; chba1c=(HbA1c_mmol_mol-31)/9.34; cegfr=(ln(eGFR)-4.5)/0.15; diabetes=1; men S0=0.9605 lp=0.5368*cage+0.4774*smoke+0.1322*csbp+0.6457*diabetes+0.1102*ctc-0.1087*chdl-0.0672*cage*smoke-0.0268*cage*csbp-0.0983*cage*diabetes-0.0181*cage*ctc+0.0095*cage*chdl-0.0998*diabetes*cdiabage+0.0955*chba1c-0.0591*cegfr+0.0058*cegfr^2-0.0134*cage*chba1c+0.0115*cage*cegfr; women S0=0.9776 lp=0.6624*cage+0.6139*smoke+0.1421*csbp+0.8096*diabetes+0.1127*ctc-0.1568*chdl-0.1122*cage*smoke-0.0167*cage*csbp-0.1272*cage*diabetes-0.0200*cage*ctc+0.0186*cage*chdl-0.118*diabetes*cdiabage+0.1173*chba1c-0.0640*cegfr+0.0062*cegfr^2-0.0196*cage*chba1c+0.0169*cage*cegfr; region scale1/scale2 SCORE2 age<70 and SCORE2-OP age 70-79; age 40-79; type 2 diabetes only; geographic region not race; not SCORE2; not SCORE2-OP",
      "sex": "male",
      "linear_predictor": 0.7175,
      "egfr_ml_min_1_73m2": 90.0,
      "sbp_mm_hg": 140.0,
      "smoker": false,
      "risk_10y_percent": 11.0,
      "european_risk_region": "moderate",
      "hdl_mmol_l": 1.3,
      "total_cholesterol_mmol_l": 5.5,
      "age_at_diabetes_diagnosis": 60,
      "hba1c_mmol_mol": 50.0
    }
  ]
}
```

## Response fields

- `formula` (string): score2_diabetes
- `formula_expression` (string): SCORE2-Diabetes 2023 sex-specific coefficients and region scale1/scale2
- `age` (integer): Age in years used (40-79)
- `sex` (string): female or male used
- `smoker` (boolean): Caller-assigned current smoking used
- `sbp_mm_hg` (number): Systolic BP used, mm Hg
- `total_cholesterol_mmol_l` (number): Total cholesterol used, mmol/L
- `hdl_mmol_l` (number): HDL cholesterol used, mmol/L
- `age_at_diabetes_diagnosis` (integer): Age at type 2 diabetes diagnosis used
- `hba1c_mmol_mol` (number): HbA1c used, IFCC mmol/mol
- `egfr_ml_min_1_73m2` (number): Caller-assigned eGFR used, mL/min/1.73 m²
- `european_risk_region` (string): Geographic calibration region used
- `linear_predictor` (number): Sex-specific linear predictor lp, 4 decimals
- `risk_10y_percent` (number): Calibrated 10-year fatal+non-fatal CVD risk percent, 1 decimal
- `citation` (object): SCORE2-Diabetes working group Eur Heart J 2023 citation
- `disclaimer` (string): Not-a-device notice

## Example JSON

Frozen fixture. Not a live lookup.

```json
{
  "age": 60,
  "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": "SCORE2-Diabetes working group and ESC Cardiovascular risk collaboration",
    "doi": "10.1093/eurheartj/ehad260",
    "id": "score2-diabetes-2023",
    "pmid": "37247330",
    "source": "Eur Heart J. 2023;44(28):2544-2556",
    "title": "SCORE2-Diabetes: 10-year cardiovascular risk estimation in type 2 diabetes in Europe"
  },
  "formula": "score2_diabetes",
  "formula_expression": "10-year fatal+non-fatal CVD % = 100*(1-exp(-exp(scale1+scale2*ln(-ln(1-uncal))))); uncal=1-S0^exp(lp); cage=(age-60)/5; csbp=(SBP-120)/20; ctc=(TC-6)/1; chdl=(HDL-1.3)/0.5; cdiabage=(age_at_dx-50)/5; chba1c=(HbA1c_mmol_mol-31)/9.34; cegfr=(ln(eGFR)-4.5)/0.15; diabetes=1; men S0=0.9605 lp=0.5368*cage+0.4774*smoke+0.1322*csbp+0.6457*diabetes+0.1102*ctc-0.1087*chdl-0.0672*cage*smoke-0.0268*cage*csbp-0.0983*cage*diabetes-0.0181*cage*ctc+0.0095*cage*chdl-0.0998*diabetes*cdiabage+0.0955*chba1c-0.0591*cegfr+0.0058*cegfr^2-0.0134*cage*chba1c+0.0115*cage*cegfr; women S0=0.9776 lp=0.6624*cage+0.6139*smoke+0.1421*csbp+0.8096*diabetes+0.1127*ctc-0.1568*chdl-0.1122*cage*smoke-0.0167*cage*csbp-0.1272*cage*diabetes-0.0200*cage*ctc+0.0186*cage*chdl-0.118*diabetes*cdiabage+0.1173*chba1c-0.0640*cegfr+0.0062*cegfr^2-0.0196*cage*chba1c+0.0169*cage*cegfr; region scale1/scale2 SCORE2 age<70 and SCORE2-OP age 70-79; age 40-79; type 2 diabetes only; geographic region not race; not SCORE2; not SCORE2-OP",
  "sex": "male",
  "linear_predictor": 0.7175,
  "egfr_ml_min_1_73m2": 90.0,
  "sbp_mm_hg": 140.0,
  "smoker": false,
  "risk_10y_percent": 11.0,
  "european_risk_region": "moderate",
  "hdl_mmol_l": 1.3,
  "total_cholesterol_mmol_l": 5.5,
  "age_at_diabetes_diagnosis": 60,
  "hba1c_mmol_mol": 50.0
}
```

## Errors

- HTTP 400 `invalid_age`: age must be an integer from 18 to 120 Returned before settlement; you are not charged.
- HTTP 400 `invalid_sex`: sex must be female or male Returned before settlement; you are not charged.
- HTTP 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.
- HTTP 400 `invalid_score2_region`: european_risk_region must be low, moderate, high, or very_high as printed in SCORE2 2021 (geographic calibration, not race). Returned before settlement; you are not charged.
- HTTP 400 `invalid_hba1c_mmol_mol`: hba1c_mmol_mol must be a number in the range used by SCORE2-Diabetes 2023 (IFCC mmol/mol, not % DCCT). Returned before settlement; you are not charged.
- HTTP 400 `invalid_egfr`: egfr_ml_min_1_73m2 must be a number from 5 to 200 (caller-assigned eGFR; magent does not compute MDRD or CKD-EPI). Returned before settlement; you are not charged.
- HTTP 400 `invalid_score2_diabetes`: SCORE2-Diabetes 2023 inputs must match that paper's age, sex, smoking, systolic BP, total and HDL cholesterol, age at diabetes diagnosis, HbA1c, eGFR, and European risk region. Returned before settlement; you are not charged.
- HTTP 400 `invalid_items`: POST body must be a JSON object with only an items array Returned before settlement; you are not charged.
- HTTP 400 `invalid_item_count`: items must be an array of 1 to 25 objects Returned before settlement; you are not charged.
- HTTP 400 `invalid_item`: each items entry must be a JSON object Returned before settlement; you are not charged.

Shared HTTP 402 and 503: https://magentlab.com/docs/payments

## Related tools

- [SCORE2 10-year CVD risk](https://magentlab.com/docs/score2) — Compute the ESC 2021 SCORE2 10-year fatal plus non-fatal CVD percent for adults aged 40-69 from sex, current smoking, systolic blood pressure, non-HDL cholesterol, and European geographic risk region.
- [FINDRISC](https://magentlab.com/docs/findrisc) — Sum the original Lindström 2003 seven-item Finnish diabetes risk score (FINDRISC, 0–20) and return at_risk when the total is ≥9.
- [Bang diabetes screening](https://magentlab.com/docs/ada-diabetes) — Sum the Bang 2009 Table 2 development screening score for undiagnosed diabetes and return high_risk when the total is ≥5.

## 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.

- GET the tool with Accept: application/json (do not send Accept: text/html unless you want the human paywall).
- HTTP 402 means you have not paid. Decode the base64 PAYMENT-REQUIRED header. HTTP 503 is not a new quote.
- Sign accepts[0] (exact, EIP-3009) with validBefore = now + maxTimeoutSeconds (600 seconds), or accepts[1] (batch-settlement deposit/voucher) on product GET. Ping and POST {items} stay exact. Magent retries transient facilitator 429/5xx before answering.
- Retry the same URL with PAYMENT-SIGNATURE (base64 JSON of accepted and payload). Magent attaches canonical extensions.bazaar on CDP verify/settle; echoing 402 bazaar is optional.
- Success is HTTP 200 JSON plus PAYMENT-RESPONSE. exact settles before the tool. batch-settlement verifies (and deposit-settles) before the tool and commits the charge after HTTP 2xx. HTTP 503: retry the same PAYMENT-SIGNATURE. Mint a new exact nonce only after a new HTTP 402.

- offered `exact` on eip155:8453: Fixed-price USDC on Base. The buyer authorizes the advertised amount (EIP-3009). magent settles before the tool runs (paymentFlow upfront). extra.assetTransferMethod=eip3009 extra.paymentFlow=upfront.
- offered `batch-settlement` on eip155:8453: Payment-channel vouchers claimed later in batches. Exact stays accepts[0]. Same-path POST {items} is still exact. extra.assetTransferMethod=eip3009 extra.paymentFlow=authorization.

- not offered `upto`: Not offered. Usage-based: buyer authorizes a ceiling, seller settles the actual amount after work. Reserved for a future metered tool. Not for current calculators or code search.

Same-path POST {items} is still scheme exact: one EIP-3009 authorization for GET unit plus $0.002 per extra item. That is not x402 batch-settlement (payment channels / vouchers).

Shared HTTP 402 and 503 table: https://magentlab.com/docs/payments

Stdio MCP (one process per host): https://magentlab.com/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.