# RibScore RibScore Status: LIVE Price: $0.005 USDC `GET /api/calc/ribscore` HTML: https://magentlab.com/docs/ribscore Markdown: https://magentlab.com/docs/ribscore.md Not a medical device. Not a diagnosis, dose, or listing recommendation. ## What it computes Sum the six Chapman 2016 RibScore radiographic flags and return the integer total 0-6. That paper associated the score linearly with pneumonia, respiratory failure, and tracheostomy. ## When to use When an agent already has caller-assigned Chapman 2016 radiographic flags and needs the published 0-6 total without inventing a CT read, named risk class, or unpublished outcome percents. ## When not to use - Not a medical device. - Not a pneumonia, respiratory-failure, or tracheostomy prediction, diagnosis, or order. - magent does not read a CT. The caller assigns the six Chapman 2016 flags (six or more rib fractures, bilateral fractures, flail chest, three or more severely bicortical displaced fractures, first rib fracture, and at least one fracture in all three anatomic areas). - Chapman 2016 associated the integer total linearly with pneumonia, respiratory failure, and tracheostomy. magent does not invent named bands or unpublished outcome percents. The payload is the 0-6 score only. ## Formula ``` RibScore = six_or_more_ribs + bilateral + flail_chest + three_or_more_displaced + first_rib + all_three_areas; each 1; Chapman 2016; max 6; caller-assigned radiographic flags; magent does not read a CT ``` ## Citation [RibScore: A novel radiographic score based on fracture pattern that predicts pneumonia, respiratory failure, and tracheostomy](https://doi.org/10.1097/TA.0000000000000867) Chapman BC, Herbert B, Rodil M, et al J Trauma Acute Care Surg. 2016;80(1):95-101 DOI: [10.1097/TA.0000000000000867](https://doi.org/10.1097/TA.0000000000000867) ## Worked example ### All flags false Given: `all_three_areas=false, bilateral=false, first_rib=false, flail_chest=false, six_or_more_ribs=false, three_or_more_displaced=false` 1. six_or_more_ribs, bilateral, flail_chest, three_or_more_displaced, first_rib, and all_three_areas are false 2. score = 0 (max 6) ### All flags true Given: `all_three_areas=true, bilateral=true, first_rib=true, flail_chest=true, six_or_more_ribs=true, three_or_more_displaced=true` 1. All six Chapman 2016 flags true, 1 point each 2. score = 6 (max 6) ## Also searched as - RibScore - rib score - Chapman RibScore - radiographic rib score - rib fracture score - Chapman 2016 rib - flail chest rib score - bicortical displaced rib fractures ## Parameters - `six_or_more_ribs` (boolean, required): Six or more rib fractures as assigned by the caller (Chapman 2016). true or false. magent does not read a CT or count fractures. - `bilateral` (boolean, required): Bilateral rib fractures as assigned by the caller (Chapman 2016). true or false. magent does not read a CT. - `flail_chest` (boolean, required): Flail chest as assigned by the caller (Chapman 2016). true or false. magent does not read a CT or examine the chest wall. - `three_or_more_displaced` (boolean, required): Three or more severely (bicortical) displaced rib fractures as assigned by the caller (Chapman 2016). true or false. magent does not read a CT or grade displacement. - `first_rib` (boolean, required): First rib fracture as assigned by the caller (Chapman 2016). true or false. magent does not read a CT. - `all_three_areas` (boolean, required): At least one fracture in all three anatomic areas (anterior, lateral, and posterior) as assigned by the caller (Chapman 2016). true or false. magent does not read a CT or assign anatomic zones. ## 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/ribscore` 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": [ { "all_three_areas": "false", "bilateral": "false", "first_rib": "false", "flail_chest": "false", "six_or_more_ribs": "false", "three_or_more_displaced": "false" }, { "all_three_areas": "false", "bilateral": "false", "first_rib": "false", "flail_chest": "false", "six_or_more_ribs": "false", "three_or_more_displaced": "false" } ] } ``` Human paywall (two-item fixture): https://api.magentlab.com/paywall/bulk/ribscore Example 200: ```json { "count": 2, "path": "/api/calc/ribscore", "items": [ { "components": [ { "factor": "six_or_more_ribs", "points": 0, "present": false }, { "factor": "bilateral", "points": 0, "present": false }, { "factor": "flail_chest", "points": 0, "present": false }, { "factor": "three_or_more_displaced", "points": 0, "present": false }, { "factor": "first_rib", "points": 0, "present": false }, { "factor": "all_three_areas", "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": "Chapman BC, Herbert B, Rodil M, et al", "doi": "10.1097/TA.0000000000000867", "id": "chapman-2016", "pmid": "26683395", "source": "J Trauma Acute Care Surg. 2016;80(1):95-101", "title": "RibScore: A novel radiographic score based on fracture pattern that predicts pneumonia, respiratory failure, and tracheostomy" }, "formula": "ribscore", "formula_expression": "RibScore = six_or_more_ribs + bilateral + flail_chest + three_or_more_displaced + first_rib + all_three_areas; each 1; Chapman 2016; max 6; caller-assigned radiographic flags; magent does not read a CT", "max_score": 6, "score": 0 }, { "components": [ { "factor": "six_or_more_ribs", "points": 0, "present": false }, { "factor": "bilateral", "points": 0, "present": false }, { "factor": "flail_chest", "points": 0, "present": false }, { "factor": "three_or_more_displaced", "points": 0, "present": false }, { "factor": "first_rib", "points": 0, "present": false }, { "factor": "all_three_areas", "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": "Chapman BC, Herbert B, Rodil M, et al", "doi": "10.1097/TA.0000000000000867", "id": "chapman-2016", "pmid": "26683395", "source": "J Trauma Acute Care Surg. 2016;80(1):95-101", "title": "RibScore: A novel radiographic score based on fracture pattern that predicts pneumonia, respiratory failure, and tracheostomy" }, "formula": "ribscore", "formula_expression": "RibScore = six_or_more_ribs + bilateral + flail_chest + three_or_more_displaced + first_rib + all_three_areas; each 1; Chapman 2016; max 6; caller-assigned radiographic flags; magent does not read a CT", "max_score": 6, "score": 0 } ] } ``` ## Response fields - `formula` (string): ribscore - `formula_expression` (string): Exact expression used - `score` (integer): RibScore points 0-6 - `max_score` (integer): Always 6 - `components` (array): Per-flag Chapman 2016 points - `citation` (object): Chapman 2016 J Trauma Acute Care Surg citation - `disclaimer` (string): Not-a-device notice ## Example JSON Frozen fixture. Not a live lookup. ```json { "components": [ { "factor": "six_or_more_ribs", "points": 0, "present": false }, { "factor": "bilateral", "points": 0, "present": false }, { "factor": "flail_chest", "points": 0, "present": false }, { "factor": "three_or_more_displaced", "points": 0, "present": false }, { "factor": "first_rib", "points": 0, "present": false }, { "factor": "all_three_areas", "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": "Chapman BC, Herbert B, Rodil M, et al", "doi": "10.1097/TA.0000000000000867", "id": "chapman-2016", "pmid": "26683395", "source": "J Trauma Acute Care Surg. 2016;80(1):95-101", "title": "RibScore: A novel radiographic score based on fracture pattern that predicts pneumonia, respiratory failure, and tracheostomy" }, "formula": "ribscore", "formula_expression": "RibScore = six_or_more_ribs + bilateral + flail_chest + three_or_more_displaced + first_rib + all_three_areas; each 1; Chapman 2016; max 6; caller-assigned radiographic flags; magent does not read a CT", "max_score": 6, "score": 0 } ``` ## Errors - HTTP 400 `invalid_ribscore`: RibScore inputs must match Chapman 2016 six radiographic flags from that paper. 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 - [ISS](https://magentlab.com/docs/iss) — Compute the Baker 1974 Injury Severity Score as the sum of squares of the three highest caller-assigned AIS body-region grades, or 75 if any region is AIS 6. - [PTS](https://magentlab.com/docs/pts) — Compute the Tepas 1987 Pediatric Trauma Score from caller-assigned weight, airway, systolic BP, CNS, skeletal, and wound grades. ## 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.