# HEADS-ED (Cappelli) HEADS-ED Status: LIVE Price: $0.005 USDC `GET /api/calc/heads_ed` HTML: https://magentlab.com/docs/heads-ed Markdown: https://magentlab.com/docs/heads-ed.md Not a medical device. Not a diagnosis, dose, or listing recommendation. ## What it computes Sum seven caller-assigned Cappelli 2012 HEADS-ED integers (0-2) and return the published 0-14 total and per-item scores. ## When to use When an agent has already assigned Cappelli 2012 0-2 integers for each HEADS-ED domain and needs the published total, not a psychiatric consult or admission order. ## When not to use - Not a medical device and not a psychiatric admission order. - Each of the seven domains is a caller-assigned integer 0, 1, or 2 from Cappelli 2012 (0 no action needed, 1 needs action but not immediately, 2 needs immediate action). magent does not interview a child. - Cappelli 2012 reported that the total predicted psychiatric consult and admission (sensitivity 82%, specificity 87%, AUC 0.82). That paper does not publish labeled score bands. magent returns the 0-14 total and per-item scores only and does not apply a later website high-risk rule as a named class. - This is Cappelli 2012 HEADS-ED only (seven domains; max 14). Not HEADS-ED Under 6. Not an unscored HEADSSS/HEEADSSS interview mnemonic. ## Formula ``` HEADS-ED = home + education + activities + drugs + suicidality + emotions + discharge_resources; each caller-assigned 0-2 (0 no action needed, 1 needs action but not immediately, 2 needs immediate action); max 14 ``` ## Citation [The HEADS-ED: a rapid mental health screening tool for pediatric patients in the emergency department](https://doi.org/10.1542/peds.2011-3798) Cappelli M, Gray C, Zemek R, Cloutier P, Kennedy A, Glennie E, Doucet G, Lyons JS Pediatrics. 2012;130(2):e321-e327 DOI: [10.1542/peds.2011-3798](https://doi.org/10.1542/peds.2011-3798) ## Worked example ### All domains 0 Given: `activities=0, discharge_resources=0, drugs=0, education=0, emotions=0, home=0, suicidality=0` 1. home 0 + education 0 + activities 0 + drugs 0 + suicidality 0 + emotions 0 + discharge_resources 0 2. Score = 0 (max 14) ### High total with suicidality 2 Given: `activities=2, discharge_resources=1, drugs=1, education=2, emotions=2, home=2, suicidality=2` 1. home 2 + education 2 + activities 2 + drugs 1 + suicidality 2 + emotions 2 + discharge_resources 1 2. Score = 12 (max 14); suicidality 2. Cappelli 2012 does not name a labeled high-risk band. ## Also searched as - HEADS-ED - HEADS ED - Cappelli HEADS-ED - pediatric ED mental health screen - home education activities drugs suicidality - HEADS-ED score - pediatric psychosocial screen ED ## Parameters - `home` (integer, required): Caller-assigned Cappelli 2012 Home (integer 0-2): 0 no action needed (supportive); 1 needs action but not immediately (conflicts); 2 needs immediate action (chaotic/dysfunctional). magent does not interview a child. - `education` (integer, required): Caller-assigned Cappelli 2012 Education (integer 0-2): 0 no action needed (on track); 1 needs action but not immediately (grades dropping or absenteeism); 2 needs immediate action (failing/not attending). magent does not interview a child. - `activities` (integer, required): Caller-assigned Cappelli 2012 Activities/peers (integer 0-2): 0 no action needed (no change); 1 needs action but not immediately (reduction in activities/increased peer conflicts); 2 needs immediate action (increasingly to fully withdrawn/significant peer conflicts). magent does not interview a child. - `drugs` (integer, required): Caller-assigned Cappelli 2012 Drugs/alcohol (integer 0-2): 0 no action needed (none or infrequent); 1 needs action but not immediately (occasional); 2 needs immediate action (frequent/daily). magent does not interview a child. - `suicidality` (integer, required): Caller-assigned Cappelli 2012 Suicidality (integer 0-2): 0 no action needed (no thoughts); 1 needs action but not immediately (ideation); 2 needs immediate action (plan or gesture). magent does not interview a child. - `emotions` (integer, required): Caller-assigned Cappelli 2012 Emotions/behavior (integer 0-2): 0 no action needed (mildly anxious/sad/acting out); 1 needs action but not immediately (moderately anxious/sad/acting out); 2 needs immediate action (significantly distressed/unable to function/out of control). magent does not interview a child. - `discharge_resources` (integer, required): Caller-assigned Cappelli 2012 Discharge resources (integer 0-2): 0 no action needed (ongoing/well connected); 1 needs action but not immediately (some/not meeting needs); 2 needs immediate action (none/on waitlist). magent does not interview a 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/heads_ed` 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", "discharge_resources": "0", "drugs": "0", "education": "0", "emotions": "0", "home": "0", "suicidality": "0" }, { "activities": "0", "discharge_resources": "0", "drugs": "0", "education": "0", "emotions": "0", "home": "0", "suicidality": "0" } ] } ``` Human paywall (two-item fixture): https://api.magentlab.com/paywall/bulk/heads-ed Example 200: ```json { "count": 2, "path": "/api/calc/heads_ed", "items": [ { "home": 0, "components": [ { "value": 0, "factor": "home", "points": 0, "present": true }, { "value": 0, "factor": "education", "points": 0, "present": true }, { "value": 0, "factor": "activities", "points": 0, "present": true }, { "value": 0, "factor": "drugs", "points": 0, "present": true }, { "value": 0, "factor": "suicidality", "points": 0, "present": true }, { "value": 0, "factor": "emotions", "points": 0, "present": true }, { "value": 0, "factor": "discharge_resources", "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": "Cappelli M, Gray C, Zemek R, Cloutier P, Kennedy A, Glennie E, Doucet G, Lyons JS", "doi": "10.1542/peds.2011-3798", "id": "cappelli-2012", "pmid": "22826567", "source": "Pediatrics. 2012;130(2):e321-e327", "title": "The HEADS-ED: a rapid mental health screening tool for pediatric patients in the emergency department" }, "formula": "heads_ed", "formula_expression": "HEADS-ED = home + education + activities + drugs + suicidality + emotions + discharge_resources; each caller-assigned 0-2 (0 no action needed, 1 needs action but not immediately, 2 needs immediate action); max 14", "max_score": 14, "score": 0, "activities": 0, "discharge_resources": 0, "drugs": 0, "education": 0, "emotions": 0, "suicidality": 0 }, { "home": 0, "components": [ { "value": 0, "factor": "home", "points": 0, "present": true }, { "value": 0, "factor": "education", "points": 0, "present": true }, { "value": 0, "factor": "activities", "points": 0, "present": true }, { "value": 0, "factor": "drugs", "points": 0, "present": true }, { "value": 0, "factor": "suicidality", "points": 0, "present": true }, { "value": 0, "factor": "emotions", "points": 0, "present": true }, { "value": 0, "factor": "discharge_resources", "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": "Cappelli M, Gray C, Zemek R, Cloutier P, Kennedy A, Glennie E, Doucet G, Lyons JS", "doi": "10.1542/peds.2011-3798", "id": "cappelli-2012", "pmid": "22826567", "source": "Pediatrics. 2012;130(2):e321-e327", "title": "The HEADS-ED: a rapid mental health screening tool for pediatric patients in the emergency department" }, "formula": "heads_ed", "formula_expression": "HEADS-ED = home + education + activities + drugs + suicidality + emotions + discharge_resources; each caller-assigned 0-2 (0 no action needed, 1 needs action but not immediately, 2 needs immediate action); max 14", "max_score": 14, "score": 0, "activities": 0, "discharge_resources": 0, "drugs": 0, "education": 0, "emotions": 0, "suicidality": 0 } ] } ``` ## Response fields - `formula` (string): heads_ed - `formula_expression` (string): Exact expression used - `score` (integer): HEADS-ED points 0-14 - `max_score` (integer): Always 14 - `home` (integer): Caller-assigned Home points 0-2 - `education` (integer): Caller-assigned Education points 0-2 - `activities` (integer): Caller-assigned Activities/peers points 0-2 - `drugs` (integer): Caller-assigned Drugs/alcohol points 0-2 - `suicidality` (integer): Caller-assigned Suicidality points 0-2 - `emotions` (integer): Caller-assigned Emotions/behavior points 0-2 - `discharge_resources` (integer): Caller-assigned Discharge resources points 0-2 - `components` (array): Per-item caller-assigned points - `citation` (object): Cappelli et al. Pediatrics 2012 citation - `disclaimer` (string): Not-a-device notice ## Example JSON Frozen fixture. Not a live lookup. ```json { "home": 0, "components": [ { "value": 0, "factor": "home", "points": 0, "present": true }, { "value": 0, "factor": "education", "points": 0, "present": true }, { "value": 0, "factor": "activities", "points": 0, "present": true }, { "value": 0, "factor": "drugs", "points": 0, "present": true }, { "value": 0, "factor": "suicidality", "points": 0, "present": true }, { "value": 0, "factor": "emotions", "points": 0, "present": true }, { "value": 0, "factor": "discharge_resources", "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": "Cappelli M, Gray C, Zemek R, Cloutier P, Kennedy A, Glennie E, Doucet G, Lyons JS", "doi": "10.1542/peds.2011-3798", "id": "cappelli-2012", "pmid": "22826567", "source": "Pediatrics. 2012;130(2):e321-e327", "title": "The HEADS-ED: a rapid mental health screening tool for pediatric patients in the emergency department" }, "formula": "heads_ed", "formula_expression": "HEADS-ED = home + education + activities + drugs + suicidality + emotions + discharge_resources; each caller-assigned 0-2 (0 no action needed, 1 needs action but not immediately, 2 needs immediate action); max 14", "max_score": 14, "score": 0, "activities": 0, "discharge_resources": 0, "drugs": 0, "education": 0, "emotions": 0, "suicidality": 0 } ``` ## Errors - HTTP 400 `invalid_heads_ed`: HEADS-ED inputs must match Cappelli 2012 home, education, activities, drugs, suicidality, emotions, and discharge resource items 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 - [PEWS](https://magentlab.com/docs/pews) — Compute the Monaghan 2005 Brighton Paediatric Early Warning Score from caller-assigned behaviour, colour/CRT, respiratory effort, oxygen, quarter-hourly nebulisers, and persistent post-surgery vomiting, plus heart rate and respiratory rate against APLS 2005 age-group rest ranges used as that paper's normal rate and mean. - [Paradise](https://magentlab.com/docs/paradise) — Apply the Paradise 1984 eligibility frequency for recurrent throat infection and return whether paradise_criteria holds (frequency met and qualifying episode features). - [PECARN febrile infant](https://magentlab.com/docs/pecarn-febrile) — Apply the Kuppermann 2019 PECARN clinical prediction rule and return low_risk only when a febrile infant 60 days or younger has a caller-assigned negative urinalysis, ANC ≤4090/µL, and serum procalcitonin ≤1.71 ng/mL. ## 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.