# ROPE score ROPE Status: LIVE Price: $0.005 USDC `GET /api/calc/rope` HTML: https://magentlab.com/docs/rope Markdown: https://magentlab.com/docs/rope.md Not a medical device. Not a diagnosis, dose, or listing recommendation. ## What it computes Compute the Kent 2013 Risk of Paradoxical Embolism (ROPE) index from Table 4 age decades and five caller-assigned vascular and infarct flags. ## When to use When an agent needs the published Kent 2013 Table 4 ROPE total and must not invent a PFO diagnosis, a closure indication, or a PASCAL classification. ## When not to use - Not a medical device. Not a PFO or cryptogenic-stroke diagnosis. - Not a closure or device-indication order. This is Kent 2013 ROPE, not PASCAL. - The five vascular and infarct flags are caller-assigned. magent does not read imaging or a smoking history. ## Formula ``` ROPE = age_points + no_hypertension 1 + no_diabetes 1 + no_prior_stroke_tia 1 + nonsmoker 1 + cortical_infarct 1; age 18-29 5, 30-39 4, 40-49 3, 50-59 2, 60-69 1, >=70 0; Kent 2013 Table 4; max 10 ``` ## Citation [An index to identify stroke-related vs incidental patent foramen ovale in cryptogenic stroke](https://doi.org/10.1212/WNL.0b013e3182a08d59) Kent DM, Ruthazer R, Weimar C, Mas JL, Serena J, Homma S, Di Angelantonio E, Di Tullio MR, Lutz JS, Elkind MSV, Griffith J, Jaigobin C, Mattle HP, Michel P, Mono ML, Nedeltchev K, Papetti F, Thaler DE Neurology. 2013;81(7):619-625 DOI: [10.1212/WNL.0b013e3182a08d59](https://doi.org/10.1212/WNL.0b013e3182a08d59) ## Worked example ### Age 70, all five flags false Given: `age=70, cortical_infarct=false, no_diabetes=false, no_hypertension=false, no_prior_stroke_tia=false, nonsmoker=false` 1. Age 70 (>=70) → 0; no_hypertension, no_diabetes, no_prior_stroke_tia, nonsmoker, and cortical_infarct all false → 0 2. Score = 0 (max 10); rope_stratum 0_to_3 ## Also searched as - ROPE score - Risk of Paradoxical Embolism - Kent ROPE - patent foramen ovale index - cryptogenic stroke PFO - stroke-related vs incidental PFO - Kent 2013 ROPE - ROPE PFO ## Parameters - `age` (integer, required): Age in years (18-120). Kent 2013 Table 4: 18-29 scores 5; 30-39 scores 4; 40-49 scores 3; 50-59 scores 2; 60-69 scores 1; 70 or older scores 0. - `no_hypertension` (boolean, required): Absence of hypertension (Kent 2013). Caller-assigned. true scores 1; false scores 0. - `no_diabetes` (boolean, required): Absence of diabetes (Kent 2013). Caller-assigned. true scores 1; false scores 0. - `no_prior_stroke_tia` (boolean, required): Absence of prior stroke or TIA (Kent 2013). Caller-assigned. true scores 1; false scores 0. - `nonsmoker` (boolean, required): Nonsmoker (Kent 2013). Caller-assigned. magent does not read a smoking history. true scores 1; false scores 0. - `cortical_infarct` (boolean, required): Cortical infarct on imaging (Kent 2013). Caller-assigned. magent does not read imaging. true scores 1; false scores 0. ## 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/rope` 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": "70", "cortical_infarct": "false", "no_diabetes": "false", "no_hypertension": "false", "no_prior_stroke_tia": "false", "nonsmoker": "false" }, { "age": "70", "cortical_infarct": "false", "no_diabetes": "false", "no_hypertension": "false", "no_prior_stroke_tia": "false", "nonsmoker": "false" } ] } ``` Human paywall (two-item fixture): https://api.magentlab.com/paywall/bulk/rope Example 200: ```json { "count": 2, "path": "/api/calc/rope", "items": [ { "components": [ { "value": 70, "factor": "age", "points": 0, "present": false }, { "factor": "no_hypertension", "points": 0, "present": false }, { "factor": "no_diabetes", "points": 0, "present": false }, { "factor": "no_prior_stroke_tia", "points": 0, "present": false }, { "factor": "nonsmoker", "points": 0, "present": false }, { "factor": "cortical_infarct", "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": "Kent DM, Ruthazer R, Weimar C, Mas JL, Serena J, Homma S, Di Angelantonio E, Di Tullio MR, Lutz JS, Elkind MSV, Griffith J, Jaigobin C, Mattle HP, Michel P, Mono ML, Nedeltchev K, Papetti F, Thaler DE", "doi": "10.1212/WNL.0b013e3182a08d59", "id": "kent-2013", "pmid": "23864310", "source": "Neurology. 2013;81(7):619-625", "title": "An index to identify stroke-related vs incidental patent foramen ovale in cryptogenic stroke" }, "formula": "rope", "formula_expression": "ROPE = age_points + no_hypertension 1 + no_diabetes 1 + no_prior_stroke_tia 1 + nonsmoker 1 + cortical_infarct 1; age 18-29 5, 30-39 4, 40-49 3, 50-59 2, 60-69 1, >=70 0; Kent 2013 Table 4; max 10", "age_years": 70, "max_score": 10, "score": 0, "rope_stratum": "0_to_3" }, { "components": [ { "value": 70, "factor": "age", "points": 0, "present": false }, { "factor": "no_hypertension", "points": 0, "present": false }, { "factor": "no_diabetes", "points": 0, "present": false }, { "factor": "no_prior_stroke_tia", "points": 0, "present": false }, { "factor": "nonsmoker", "points": 0, "present": false }, { "factor": "cortical_infarct", "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": "Kent DM, Ruthazer R, Weimar C, Mas JL, Serena J, Homma S, Di Angelantonio E, Di Tullio MR, Lutz JS, Elkind MSV, Griffith J, Jaigobin C, Mattle HP, Michel P, Mono ML, Nedeltchev K, Papetti F, Thaler DE", "doi": "10.1212/WNL.0b013e3182a08d59", "id": "kent-2013", "pmid": "23864310", "source": "Neurology. 2013;81(7):619-625", "title": "An index to identify stroke-related vs incidental patent foramen ovale in cryptogenic stroke" }, "formula": "rope", "formula_expression": "ROPE = age_points + no_hypertension 1 + no_diabetes 1 + no_prior_stroke_tia 1 + nonsmoker 1 + cortical_infarct 1; age 18-29 5, 30-39 4, 40-49 3, 50-59 2, 60-69 1, >=70 0; Kent 2013 Table 4; max 10", "age_years": 70, "max_score": 10, "score": 0, "rope_stratum": "0_to_3" } ] } ``` ## Response fields - `formula` (string): rope - `formula_expression` (string): Exact expression used - `score` (integer): Total points 0-10 - `max_score` (integer): Always 10 - `rope_stratum` (string): Kent 2013 abstract groupings: 0_to_3 (score 0-3), 9_to_10 (score 9-10), or 4_to_8 residual (score 4-8). Not a named risk class. - `age_years` (integer): Age used for Table 4 decade points - `components` (array): Per-factor points - `citation` (object): Kent 2013 Neurology citation - `disclaimer` (string): Not-a-device notice ## Example JSON Frozen fixture. Not a live lookup. ```json { "components": [ { "value": 70, "factor": "age", "points": 0, "present": false }, { "factor": "no_hypertension", "points": 0, "present": false }, { "factor": "no_diabetes", "points": 0, "present": false }, { "factor": "no_prior_stroke_tia", "points": 0, "present": false }, { "factor": "nonsmoker", "points": 0, "present": false }, { "factor": "cortical_infarct", "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": "Kent DM, Ruthazer R, Weimar C, Mas JL, Serena J, Homma S, Di Angelantonio E, Di Tullio MR, Lutz JS, Elkind MSV, Griffith J, Jaigobin C, Mattle HP, Michel P, Mono ML, Nedeltchev K, Papetti F, Thaler DE", "doi": "10.1212/WNL.0b013e3182a08d59", "id": "kent-2013", "pmid": "23864310", "source": "Neurology. 2013;81(7):619-625", "title": "An index to identify stroke-related vs incidental patent foramen ovale in cryptogenic stroke" }, "formula": "rope", "formula_expression": "ROPE = age_points + no_hypertension 1 + no_diabetes 1 + no_prior_stroke_tia 1 + nonsmoker 1 + cortical_infarct 1; age 18-29 5, 30-39 4, 40-49 3, 50-59 2, 60-69 1, >=70 0; Kent 2013 Table 4; max 10", "age_years": 70, "max_score": 10, "score": 0, "rope_stratum": "0_to_3" } ``` ## Errors - HTTP 400 `invalid_age`: age must be an integer from 18 to 120 Returned before settlement; you are not charged. - HTTP 400 `invalid_flag`: boolean clinical flags must be true or false 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 - [ABCD2 score](https://magentlab.com/docs/abcd2) — Compute the ABCD2 score as age, blood pressure, caller-assigned clinical features, symptom duration, and diabetes. - [THRIVE](https://magentlab.com/docs/thrive) — Compute the Flint 2010 THRIVE (Totaled Health Risks in Vascular Events) score from trichotomized age, trichotomized NIHSS, and the chronic disease scale (hypertension, diabetes mellitus, atrial fibrillation). ## 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. - 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.