# ORBIT bleeding score ORBIT bleeding score Status: LIVE Price: $0.005 USDC `GET /api/calc/orbit` HTML: https://magentlab.com/docs/orbit Markdown: https://magentlab.com/docs/orbit.md Not a medical device. Not a diagnosis, dose, or listing recommendation. ## What it computes Compute the O'Brien 2015 ORBIT bleeding score from age and caller-assigned anemia, bleeding history, insufficient kidney, and antiplatelet flags. ## When to use When an agent needs the published ORBIT AF bleeding-risk arithmetic (not HAS-BLED) and must not invent the point total from prose. ## When not to use - Not a diagnosis. magent does not diagnose bleeding or atrial fibrillation. - Not HAS-BLED. This tool is the O'Brien 2015 ORBIT bleeding score only. - Not a treatment or anticoagulation recommendation. - magent does not take hemoglobin or compute eGFR. Anemia and insufficient kidney (paper eGFR <60) are caller flags. ## Formula ``` ORBIT = age_ge_75 (1) + anemia (2) + bleeding_history (2) + insufficient_kidney (1) + antiplatelet (1); max 7; 0-2 low, 3 intermediate, >=4 high ``` ## Citation [The ORBIT bleeding score: a simple bedside score to assess bleeding risk in atrial fibrillation](https://doi.org/10.1093/eurheartj/ehv182) O'Brien EC, Simon DN, Thomas LE, et al. Eur Heart J. 2015;36(46):3258-3264 DOI: [10.1093/eurheartj/ehv182](https://doi.org/10.1093/eurheartj/ehv182) ## Worked example ### Age 70, all flags false Given: `age=70, anemia=false, antiplatelet=false, bleeding_history=false, insufficient_kidney=false` 1. Age 70 is not ≥75 → 0; anemia, bleeding history, insufficient kidney, and antiplatelet false → 0 2. Score = 0 (max 7); orbit_risk low ### Age 75 plus anemia is intermediate Given: `age=75, anemia=true, antiplatelet=false, bleeding_history=false, insufficient_kidney=false` 1. Age 75 ≥ 75 → 1; anemia → 2 2. Score = 3 (max 7); orbit_risk intermediate ## Also searched as - ORBIT score - ORBIT bleeding score - O'Brien bleeding score - AF ORBIT score - ORBIT AF bleed ## Parameters - `age` (integer, required): Age in years (18-120). ≥75 scores 1 (75 scores; 74 does not). - `anemia` (boolean, required): Anemia as assigned by the caller. true or false. Scores 2. magent does not take hemoglobin. - `bleeding_history` (boolean, required): Bleeding history as assigned by the caller. true or false. Scores 2. - `insufficient_kidney` (boolean, required): Insufficient kidney function as assigned by the caller (paper eGFR <60). true or false. Scores 1. magent does not compute eGFR. - `antiplatelet` (boolean, required): Antiplatelet therapy as assigned by the caller. true or false. Scores 1. ## 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/orbit` 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", "anemia": "false", "antiplatelet": "false", "bleeding_history": "false", "insufficient_kidney": "false" }, { "age": "70", "anemia": "false", "antiplatelet": "false", "bleeding_history": "false", "insufficient_kidney": "false" } ] } ``` Human paywall (two-item fixture): https://api.magentlab.com/paywall/bulk/orbit Example 200: ```json { "count": 2, "path": "/api/calc/orbit", "items": [ { "components": [ { "value": 70, "factor": "age_ge_75", "points": 0, "present": false }, { "factor": "anemia", "points": 0, "present": false }, { "factor": "bleeding_history", "points": 0, "present": false }, { "factor": "insufficient_kidney", "points": 0, "present": false }, { "factor": "antiplatelet", "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.", "age_years": 70, "citation": { "authors": "O'Brien EC, Simon DN, Thomas LE, et al.", "doi": "10.1093/eurheartj/ehv182", "id": "obrien-2015", "source": "Eur Heart J. 2015;36(46):3258-3264", "title": "The ORBIT bleeding score: a simple bedside score to assess bleeding risk in atrial fibrillation" }, "formula": "orbit", "formula_expression": "ORBIT = age_ge_75 (1) + anemia (2) + bleeding_history (2) + insufficient_kidney (1) + antiplatelet (1); max 7; 0-2 low, 3 intermediate, >=4 high", "max_score": 7, "score": 0, "orbit_risk": "low" }, { "components": [ { "value": 70, "factor": "age_ge_75", "points": 0, "present": false }, { "factor": "anemia", "points": 0, "present": false }, { "factor": "bleeding_history", "points": 0, "present": false }, { "factor": "insufficient_kidney", "points": 0, "present": false }, { "factor": "antiplatelet", "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.", "age_years": 70, "citation": { "authors": "O'Brien EC, Simon DN, Thomas LE, et al.", "doi": "10.1093/eurheartj/ehv182", "id": "obrien-2015", "source": "Eur Heart J. 2015;36(46):3258-3264", "title": "The ORBIT bleeding score: a simple bedside score to assess bleeding risk in atrial fibrillation" }, "formula": "orbit", "formula_expression": "ORBIT = age_ge_75 (1) + anemia (2) + bleeding_history (2) + insufficient_kidney (1) + antiplatelet (1); max 7; 0-2 low, 3 intermediate, >=4 high", "max_score": 7, "score": 0, "orbit_risk": "low" } ] } ``` ## Response fields - `formula` (string): orbit - `formula_expression` (string): Exact expression used - `score` (integer): Total points 0-7 - `max_score` (integer): Always 7 - `orbit_risk` (string): low when score is 0-2; intermediate when 3; high when ≥4. Not a diagnosis. - `age_years` (integer): Age used for the ≥75 criterion - `components` (array): Per-factor points - `citation` (object): O'Brien 2015 Eur Heart J citation - `disclaimer` (string): Not-a-device notice ## Example JSON Frozen fixture. Not a live lookup. ```json { "components": [ { "value": 70, "factor": "age_ge_75", "points": 0, "present": false }, { "factor": "anemia", "points": 0, "present": false }, { "factor": "bleeding_history", "points": 0, "present": false }, { "factor": "insufficient_kidney", "points": 0, "present": false }, { "factor": "antiplatelet", "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.", "age_years": 70, "citation": { "authors": "O'Brien EC, Simon DN, Thomas LE, et al.", "doi": "10.1093/eurheartj/ehv182", "id": "obrien-2015", "source": "Eur Heart J. 2015;36(46):3258-3264", "title": "The ORBIT bleeding score: a simple bedside score to assess bleeding risk in atrial fibrillation" }, "formula": "orbit", "formula_expression": "ORBIT = age_ge_75 (1) + anemia (2) + bleeding_history (2) + insufficient_kidney (1) + antiplatelet (1); max 7; 0-2 low, 3 intermediate, >=4 high", "max_score": 7, "score": 0, "orbit_risk": "low" } ``` ## 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 - [HAS-BLED](https://magentlab.com/docs/has-bled) — Compute the HAS-BLED bleeding-risk score from discrete clinical flags. - [CHA2DS2-VASc](https://magentlab.com/docs/cha2ds2-vasc) — Compute the CHA2DS2-VASc stroke-risk score from discrete clinical flags. ## 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. - 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 EIP-3009 (scheme exact, assetTransferMethod eip3009) with validBefore = now + accepts[0].maxTimeoutSeconds (600 seconds). That window starts when you sign and must cover wallet confirmation plus CDP verify and settle. Magent retries transient facilitator 429/5xx before answering. Do not send upto or batch-settlement payloads; magent does not offer those schemes. - Retry the same URL with PAYMENT-SIGNATURE (base64 JSON echoing accepted, payload, and extensions when present). - Success is HTTP 200 JSON plus PAYMENT-RESPONSE. Settlement happens before the tool runs. HTTP 503 settlement_uncertain or settle_failed: retry the same PAYMENT-SIGNATURE. Mint a new 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. - 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. - not offered `batch-settlement`: Not offered. Payment-channel vouchers claimed later in batches. Not the same as POST {items} bulk (that is still exact). 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 - 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.