# Pediatric ulcerative colitis activity index (PUCAI) PUCAI Status: LIVE Price: $0.005 USDC `GET /api/calc/pucai` HTML: https://magentlab.com/docs/pucai Markdown: https://magentlab.com/docs/pucai.md Not a medical device. Not a diagnosis, dose, or listing recommendation. ## What it computes Sum six caller-assigned Turner 2007 PUCAI item points and return the published total (max 85) with activity band. ## When to use When an agent has already assigned Turner 2007 published point values for the six PUCAI items and needs the total and published activity band, not a diagnosis, adult Mayo score, or treatment order. ## When not to use - Not a medical device and not a diagnosis of ulcerative colitis or a treatment order. - Each of the six items is a caller-assigned published point value from Turner 2007. magent does not examine the child. - Pediatric ulcerative colitis activity index (PUCAI). No age parameter. Not the adult Mayo score or UCDAI. - Activity bands follow Turner 2007: <10 remission, 10-34 mild (10 and 34 are mild), 35-64 moderate (35 and 64 are moderate), ≥65 severe (65 is severe). magent does not add unofficial adult cutoffs. ## Formula ``` PUCAI = abdominal_pain + rectal_bleeding + stool_consistency_of_most + stools_per_24h + nocturnal_stools + activity_level; Turner 2007 caller-assigned item points; max 85; <10 remission, 10-34 mild, 35-64 moderate, ≥65 severe ``` ## Citation [Development, validation, and evaluation of a pediatric ulcerative colitis activity index: a prospective multicenter study](https://doi.org/10.1053/j.gastro.2007.05.029) Turner D, Otley AR, Mack D, et al. Gastroenterology. 2007;133(2):423-432 DOI: [10.1053/j.gastro.2007.05.029](https://doi.org/10.1053/j.gastro.2007.05.029) ## Worked example ### All items 0 Given: `abdominal_pain=0, activity_level=0, nocturnal_stools=0, rectal_bleeding=0, stool_consistency_of_most=0, stools_per_24h=0` 1. abdominal_pain 0 + rectal_bleeding 0 + stool_consistency_of_most 0 + stools_per_24h 0 + nocturnal_stools 0 + activity_level 0 2. Score = 0 (max 85), activity_band remission ### All items maximum Given: `abdominal_pain=10, activity_level=10, nocturnal_stools=10, rectal_bleeding=30, stool_consistency_of_most=10, stools_per_24h=15` 1. abdominal_pain 10 + rectal_bleeding 30 + stool_consistency_of_most 10 + stools_per_24h 15 + nocturnal_stools 10 + activity_level 10 2. Score = 85 (max 85), activity_band severe ## Also searched as - PUCAI - pediatric ulcerative colitis activity index - Turner PUCAI - pediatric UC activity - PUCAI score - ulcerative colitis children - Turner 2007 PUCAI ## Parameters - `abdominal_pain` (integer, required): Caller-assigned Turner 2007 PUCAI abdominal pain points (integer 0, 5, or 10): 0 no pain; 5 pain can be ignored; 10 pain cannot be ignored. magent does not examine the child. - `rectal_bleeding` (integer, required): Caller-assigned Turner 2007 PUCAI rectal bleeding points (integer 0, 10, 20, or 30): 0 none; 10 small amount only, in less than 50% of stools; 20 small amount with most stools; 30 large amount (>50% of the stool content). magent does not examine the child. - `stool_consistency_of_most` (integer, required): Caller-assigned Turner 2007 PUCAI stool consistency of most stools points (integer 0, 5, or 10): 0 formed; 5 partially formed; 10 completely unformed. magent does not examine the child. - `stools_per_24h` (integer, required): Caller-assigned Turner 2007 PUCAI number of stools per 24 hours points (integer 0, 5, 10, or 15): 0 for 0-2 stools; 5 for 3-5; 10 for 6-8; 15 for >8. magent does not examine the child. - `nocturnal_stools` (integer, required): Caller-assigned Turner 2007 PUCAI nocturnal stools points (integer 0 or 10): 0 no; 10 yes (any episode causing wakening). magent does not examine the child. - `activity_level` (integer, required): Caller-assigned Turner 2007 PUCAI activity level points (integer 0, 5, or 10): 0 no limitation of activity; 5 occasional limitation of activity; 10 severe restricted activity. magent does not examine the child. ## 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/pucai` 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": [ { "abdominal_pain": "0", "activity_level": "0", "nocturnal_stools": "0", "rectal_bleeding": "0", "stool_consistency_of_most": "0", "stools_per_24h": "0" }, { "abdominal_pain": "0", "activity_level": "0", "nocturnal_stools": "0", "rectal_bleeding": "0", "stool_consistency_of_most": "0", "stools_per_24h": "0" } ] } ``` Human paywall (two-item fixture): https://api.magentlab.com/paywall/bulk/pucai Example 200: ```json { "count": 2, "path": "/api/calc/pucai", "items": [ { "components": [ { "value": 0, "factor": "abdominal_pain", "points": 0, "present": true }, { "value": 0, "factor": "rectal_bleeding", "points": 0, "present": true }, { "value": 0, "factor": "stool_consistency_of_most", "points": 0, "present": true }, { "value": 0, "factor": "stools_per_24h", "points": 0, "present": true }, { "value": 0, "factor": "nocturnal_stools", "points": 0, "present": true }, { "value": 0, "factor": "activity_level", "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": "Turner D, Otley AR, Mack D, et al.", "doi": "10.1053/j.gastro.2007.05.029", "id": "turner-2007", "pmid": "17681163", "source": "Gastroenterology. 2007;133(2):423-432", "title": "Development, validation, and evaluation of a pediatric ulcerative colitis activity index: a prospective multicenter study" }, "formula": "pucai", "formula_expression": "PUCAI = abdominal_pain + rectal_bleeding + stool_consistency_of_most + stools_per_24h + nocturnal_stools + activity_level; Turner 2007 caller-assigned item points; max 85; <10 remission, 10-34 mild, 35-64 moderate, ≥65 severe", "max_score": 85, "score": 0, "activity_band": "remission", "abdominal_pain": 0, "activity_level": 0, "nocturnal_stools": 0, "rectal_bleeding": 0, "stool_consistency_of_most": 0, "stools_per_24h": 0 }, { "components": [ { "value": 0, "factor": "abdominal_pain", "points": 0, "present": true }, { "value": 0, "factor": "rectal_bleeding", "points": 0, "present": true }, { "value": 0, "factor": "stool_consistency_of_most", "points": 0, "present": true }, { "value": 0, "factor": "stools_per_24h", "points": 0, "present": true }, { "value": 0, "factor": "nocturnal_stools", "points": 0, "present": true }, { "value": 0, "factor": "activity_level", "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": "Turner D, Otley AR, Mack D, et al.", "doi": "10.1053/j.gastro.2007.05.029", "id": "turner-2007", "pmid": "17681163", "source": "Gastroenterology. 2007;133(2):423-432", "title": "Development, validation, and evaluation of a pediatric ulcerative colitis activity index: a prospective multicenter study" }, "formula": "pucai", "formula_expression": "PUCAI = abdominal_pain + rectal_bleeding + stool_consistency_of_most + stools_per_24h + nocturnal_stools + activity_level; Turner 2007 caller-assigned item points; max 85; <10 remission, 10-34 mild, 35-64 moderate, ≥65 severe", "max_score": 85, "score": 0, "activity_band": "remission", "abdominal_pain": 0, "activity_level": 0, "nocturnal_stools": 0, "rectal_bleeding": 0, "stool_consistency_of_most": 0, "stools_per_24h": 0 } ] } ``` ## Response fields - `formula` (string): pucai - `formula_expression` (string): Exact expression used - `score` (integer): PUCAI points 0-85 - `max_score` (integer): Always 85 - `activity_band` (string): Turner 2007 band: remission (<10), mild (10-34), moderate (35-64), or severe (≥65). Score 10 is mild; 34 is mild; 35 is moderate; 64 is moderate; 65 is severe. Not a diagnosis and not an adult Mayo cutoff. - `abdominal_pain` (integer): Caller-assigned abdominal pain points 0, 5, or 10 - `rectal_bleeding` (integer): Caller-assigned rectal bleeding points 0, 10, 20, or 30 - `stool_consistency_of_most` (integer): Caller-assigned stool consistency of most stools points 0, 5, or 10 - `stools_per_24h` (integer): Caller-assigned stools per 24 hours points 0, 5, 10, or 15 - `nocturnal_stools` (integer): Caller-assigned nocturnal stools points 0 or 10 - `activity_level` (integer): Caller-assigned activity level points 0, 5, or 10 - `components` (array): Per-item caller-assigned points - `citation` (object): Turner et al. Gastroenterology 2007 citation - `disclaimer` (string): Not-a-device notice ## Example JSON Frozen fixture. Not a live lookup. ```json { "components": [ { "value": 0, "factor": "abdominal_pain", "points": 0, "present": true }, { "value": 0, "factor": "rectal_bleeding", "points": 0, "present": true }, { "value": 0, "factor": "stool_consistency_of_most", "points": 0, "present": true }, { "value": 0, "factor": "stools_per_24h", "points": 0, "present": true }, { "value": 0, "factor": "nocturnal_stools", "points": 0, "present": true }, { "value": 0, "factor": "activity_level", "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": "Turner D, Otley AR, Mack D, et al.", "doi": "10.1053/j.gastro.2007.05.029", "id": "turner-2007", "pmid": "17681163", "source": "Gastroenterology. 2007;133(2):423-432", "title": "Development, validation, and evaluation of a pediatric ulcerative colitis activity index: a prospective multicenter study" }, "formula": "pucai", "formula_expression": "PUCAI = abdominal_pain + rectal_bleeding + stool_consistency_of_most + stools_per_24h + nocturnal_stools + activity_level; Turner 2007 caller-assigned item points; max 85; <10 remission, 10-34 mild, 35-64 moderate, ≥65 severe", "max_score": 85, "score": 0, "activity_band": "remission", "abdominal_pain": 0, "activity_level": 0, "nocturnal_stools": 0, "rectal_bleeding": 0, "stool_consistency_of_most": 0, "stools_per_24h": 0 } ``` ## Errors - HTTP 400 `invalid_pucai`: each PUCAI item must be a published point value from Turner 2007. 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 - [Forrest](https://magentlab.com/docs/forrest) — Return the Forrest 1974 endoscopic lesion class (ia, ib, iia, iib, iic, or iii) and published description from a caller-assigned token. ## 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.