# COPD Assessment Test CAT Status: LIVE Price: $0.005 USDC `GET /api/calc/cat` HTML: https://magentlab.com/docs/cat Markdown: https://magentlab.com/docs/cat.md Not a medical device. Not a diagnosis, dose, or listing recommendation. ## What it computes Sum eight caller-assigned Jones 2009 CAT items (each integer 0-5) and return the published 0-40 total. Does not apply later GOLD CAT impact bands. ## When to use When an agent already has Jones 2009 integers 0-5 for the eight CAT items and needs the published total. magent does not interview the patient, diagnose COPD, score BODE, assign GOLD ABE groups, or apply later 0-10/11-20/21-30/31-40 GOLD impact bands. ## When not to use - Not a medical device and not a COPD diagnosis or treatment order. - Each of the eight items is a caller-assigned integer 0-5. magent does not interview the patient. - This is Jones 2009 CAT only (eight items; max 40). magent does not score BODE and does not assign GOLD ABE groups. - Jones 2009 published no GOLD 0-10 / 11-20 / 21-30 / 31-40 CAT impact bands. This tool returns score and max_score only. It does not apply later website or GOLD cutoffs. ## Formula ``` CAT = cough + phlegm + chest_tightness + breathlessness + activities + confidence + sleep + energy; each caller-assigned 0-5; Jones 2009 eight items; max 40; no GOLD 0-10 / 11-20 / 21-30 / 31-40 impact bands ``` ## Citation [Development and first validation of the COPD Assessment Test](https://doi.org/10.1183/09031936.00102509) Jones PW, Harding G, Berry P, Wiklund I, Chen WH, Kline Leidy N Eur Respir J. 2009;34(3):648-654 DOI: [10.1183/09031936.00102509](https://doi.org/10.1183/09031936.00102509) ## Worked example ### All items 0 Given: `activities=0, breathlessness=0, chest_tightness=0, confidence=0, cough=0, energy=0, phlegm=0, sleep=0` 1. cough, phlegm, chest_tightness, breathlessness, activities, confidence, sleep, and energy are 0 as assigned by the caller 2. Score = 0 (max 40). Jones 2009 published no GOLD CAT impact band. ### All items 5 Given: `activities=5, breathlessness=5, chest_tightness=5, confidence=5, cough=5, energy=5, phlegm=5, sleep=5` 1. each of the eight Jones 2009 CAT items is 5 as assigned by the caller 2. Score = 40 (max 40). No GOLD CAT impact band. ## Also searched as - COPD Assessment Test - CAT score - Jones 2009 CAT - COPD CAT questionnaire - eight-item CAT - COPD health status CAT ## Parameters - `cough` (integer, required): Caller-assigned Jones 2009 CAT cough (integer 0-5): 0 I never cough to 5 I cough all the time. magent does not interview the patient. - `phlegm` (integer, required): Caller-assigned Jones 2009 CAT phlegm (integer 0-5): 0 I have no phlegm (mucus) in my chest at all to 5 my chest is completely full of phlegm (mucus). magent does not interview the patient. - `chest_tightness` (integer, required): Caller-assigned Jones 2009 CAT chest tightness (integer 0-5): 0 my chest does not feel tight at all to 5 my chest feels very tight. magent does not interview the patient. - `breathlessness` (integer, required): Caller-assigned Jones 2009 CAT breathlessness (integer 0-5): 0 when I walk up a hill or one flight of stairs I am not breathless to 5 when I walk up a hill or one flight of stairs I am very breathless. magent does not interview the patient. - `activities` (integer, required): Caller-assigned Jones 2009 CAT activities (integer 0-5): 0 I am not limited doing any activities at home to 5 I am very limited doing activities at home. magent does not interview the patient. - `confidence` (integer, required): Caller-assigned Jones 2009 CAT confidence (integer 0-5): 0 I am confident leaving my home despite my lung condition to 5 I am not at all confident leaving my home because of my lung condition. magent does not interview the patient. - `sleep` (integer, required): Caller-assigned Jones 2009 CAT sleep (integer 0-5): 0 I sleep soundly to 5 I don't sleep soundly because of my lung condition. magent does not interview the patient. - `energy` (integer, required): Caller-assigned Jones 2009 CAT energy (integer 0-5): 0 I have lots of energy to 5 I have no energy at all. magent does not interview the patient. ## 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/cat` 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": [ { "activities": "0", "breathlessness": "0", "chest_tightness": "0", "confidence": "0", "cough": "0", "energy": "0", "phlegm": "0", "sleep": "0" }, { "activities": "0", "breathlessness": "0", "chest_tightness": "0", "confidence": "0", "cough": "0", "energy": "0", "phlegm": "0", "sleep": "0" } ] } ``` Human paywall (two-item fixture): https://api.magentlab.com/paywall/bulk/cat Example 200: ```json { "count": 2, "path": "/api/calc/cat", "items": [ { "components": [ { "value": 0, "factor": "cough", "points": 0, "present": true }, { "value": 0, "factor": "phlegm", "points": 0, "present": true }, { "value": 0, "factor": "chest_tightness", "points": 0, "present": true }, { "value": 0, "factor": "breathlessness", "points": 0, "present": true }, { "value": 0, "factor": "activities", "points": 0, "present": true }, { "value": 0, "factor": "confidence", "points": 0, "present": true }, { "value": 0, "factor": "sleep", "points": 0, "present": true }, { "value": 0, "factor": "energy", "points": 0, "present": true } ], "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": "Jones PW, Harding G, Berry P, Wiklund I, Chen WH, Kline Leidy N", "doi": "10.1183/09031936.00102509", "id": "jones-2009", "pmid": "19720809", "source": "Eur Respir J. 2009;34(3):648-654", "title": "Development and first validation of the COPD Assessment Test" }, "formula": "cat", "formula_expression": "CAT = cough + phlegm + chest_tightness + breathlessness + activities + confidence + sleep + energy; each caller-assigned 0-5; Jones 2009 eight items; max 40; no GOLD 0-10 / 11-20 / 21-30 / 31-40 impact bands", "max_score": 40, "score": 0 }, { "components": [ { "value": 0, "factor": "cough", "points": 0, "present": true }, { "value": 0, "factor": "phlegm", "points": 0, "present": true }, { "value": 0, "factor": "chest_tightness", "points": 0, "present": true }, { "value": 0, "factor": "breathlessness", "points": 0, "present": true }, { "value": 0, "factor": "activities", "points": 0, "present": true }, { "value": 0, "factor": "confidence", "points": 0, "present": true }, { "value": 0, "factor": "sleep", "points": 0, "present": true }, { "value": 0, "factor": "energy", "points": 0, "present": true } ], "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": "Jones PW, Harding G, Berry P, Wiklund I, Chen WH, Kline Leidy N", "doi": "10.1183/09031936.00102509", "id": "jones-2009", "pmid": "19720809", "source": "Eur Respir J. 2009;34(3):648-654", "title": "Development and first validation of the COPD Assessment Test" }, "formula": "cat", "formula_expression": "CAT = cough + phlegm + chest_tightness + breathlessness + activities + confidence + sleep + energy; each caller-assigned 0-5; Jones 2009 eight items; max 40; no GOLD 0-10 / 11-20 / 21-30 / 31-40 impact bands", "max_score": 40, "score": 0 } ] } ``` ## Response fields - `formula` (string): cat - `formula_expression` (string): Exact expression used - `score` (integer): Jones 2009 sum of eight caller-assigned 0-5 items (total 0-40) - `max_score` (integer): Always 40 - `components` (array): Per-item caller-assigned points - `citation` (object): Jones Eur Respir J 2009 citation - `disclaimer` (string): Not-a-device notice ## Example JSON Frozen fixture. Not a live lookup. ```json { "components": [ { "value": 0, "factor": "cough", "points": 0, "present": true }, { "value": 0, "factor": "phlegm", "points": 0, "present": true }, { "value": 0, "factor": "chest_tightness", "points": 0, "present": true }, { "value": 0, "factor": "breathlessness", "points": 0, "present": true }, { "value": 0, "factor": "activities", "points": 0, "present": true }, { "value": 0, "factor": "confidence", "points": 0, "present": true }, { "value": 0, "factor": "sleep", "points": 0, "present": true }, { "value": 0, "factor": "energy", "points": 0, "present": true } ], "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": "Jones PW, Harding G, Berry P, Wiklund I, Chen WH, Kline Leidy N", "doi": "10.1183/09031936.00102509", "id": "jones-2009", "pmid": "19720809", "source": "Eur Respir J. 2009;34(3):648-654", "title": "Development and first validation of the COPD Assessment Test" }, "formula": "cat", "formula_expression": "CAT = cough + phlegm + chest_tightness + breathlessness + activities + confidence + sleep + energy; each caller-assigned 0-5; Jones 2009 eight items; max 40; no GOLD 0-10 / 11-20 / 21-30 / 31-40 impact bands", "max_score": 40, "score": 0 } ``` ## Errors - HTTP 400 `invalid_cat`: COPD Assessment Test needs the eight Jones 2009 items each as an integer 0-5. Returned before settlement; you are not charged. - HTTP 400 `invalid_cat_item`: each CAT item must be an integer from 0 to 5 (Jones 2009). 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 - [BODE](https://magentlab.com/docs/bode) — Sum Celli 2004 BODE points from BMI, FEV1 percent predicted, MMRC dyspnea, and 6-minute walk distance. - [GOLD spirometric grade](https://magentlab.com/docs/gold-copd) — Apply the 2017 GOLD executive summary spirometric classification: obstruction when post-bronchodilator FEV1/FVC is < 0.70, then GOLD grades 1-4 from FEV1 percent predicted. ## 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.