MAGENT

Emergency · LIVE

CRAFFT questionnaire

CRAFFT

Sum the six Knight 2002 CRAFFT items and return whether two or more answers are affirmative.

LIVE $0.005 USDC GET /api/calc/crafft

Markdown: /docs/crafft.md · Canonical: https://magentlab.com/docs/crafft

Not a medical device. Not a diagnosis, dose, or listing recommendation.

What it computes

Sum the six Knight 2002 CRAFFT items and return whether two or more answers are affirmative.

When to use

When an agent needs the published CRAFFT point total and Knight 2002 ≥2 screen and must not invent a diagnosis or interview the patient.

When not to use

  • Not a medical device and not a diagnosis of a substance use disorder.
  • magent does not interview the patient.
  • The caller assigns each flag. magent does not interpret individual items.
  • This is Knight 2002 CRAFFT only (six yes/no flags; screen-positive at score ≥2). Not CAGE and not CRAFFT 2.1 / 2.0 quantity questions.

Formula

CRAFFT = car + relax + alone + forget + friends + trouble; each 1 if true; max 6

Citation

Title
Validity of the CRAFFT substance abuse screening test among adolescent clinic patients
Authors
Knight JR, Sherritt L, Shrier LA, Harris SK, Chang G
Source
Arch Pediatr Adolesc Med. 2002;156(6):607-614
DOI
10.1001/archpedi.156.6.607

Worked example

All items false

Given: alone=falsecar=falseforget=falsefriends=falserelax=falsetrouble=false

  1. score = 0
  2. screen_positive false (threshold is ≥2)

Car and Relax

Given: alone=falsecar=trueforget=falsefriends=falserelax=truetrouble=false

  1. score = 2
  2. screen_positive true

Also searched as

  • CRAFFT questionnaire
  • CRAFFT substance abuse screen
  • Knight CRAFFT
  • car relax alone forget friends trouble
  • CRAFFT score
  • adolescent substance CRAFFT

Try

Opens the live endpoint. Unpaid browser requests show the paywall; agents should send Accept: application/json.

/api/calc/crafft?car=false&relax=false&alone=false&forget=false&friends=false&trouble=false

Full URL: https://api.magentlab.com/api/calc/crafft?car=false&relax=false&alone=false&forget=false&friends=false&trouble=false

Call

Expect HTTP 402 until you retry with PAYMENT-SIGNATURE. Incomplete query params return HTTP 400 before any quote or charge. 

curl -i -H "Accept: application/json" "https://api.magentlab.com/api/calc/crafft?car=false&relax=false&alone=false&forget=false&friends=false&trouble=false"

Parameters

Name Type Required Description
car boolean required Have you ever ridden in a CAR driven by someone (including yourself) who was high or had been using alcohol or drugs? (Knight 2002). true or false as assigned by the caller. magent does not interview the patient.
relax boolean required Do you ever use alcohol or drugs to RELAX, feel better about yourself, or fit in? (Knight 2002). true or false as assigned by the caller. magent does not interview the patient.
alone boolean required Do you ever use alcohol or drugs while you are by yourself, or ALONE? (Knight 2002). true or false as assigned by the caller. magent does not interview the patient.
forget boolean required Do you ever FORGET things you did while using alcohol or drugs? (Knight 2002). true or false as assigned by the caller. magent does not interview the patient.
friends boolean required Do your family or FRIENDS ever tell you that you should cut down on your drinking or drug use? (Knight 2002). true or false as assigned by the caller. magent does not interview the patient.
trouble boolean required Have you gotten into TROUBLE while using alcohol or drugs? (Knight 2002). true or false as assigned by the caller. 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.

POST /api/calc/crafft Max 25 unit_amount + extra_item_amount * (n - 1) extra $0.002 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 (fixture)

{
  "items": [
    {
      "alone": "false",
      "car": "false",
      "forget": "false",
      "friends": "false",
      "relax": "false",
      "trouble": "false"
    },
    {
      "alone": "false",
      "car": "false",
      "forget": "false",
      "friends": "false",
      "relax": "false",
      "trouble": "false"
    }
  ]
}

Open bulk paywall →

Opens a two-item fixture on the API host. Unpaid browsers get the same MetaMask paywall as GET; Pay retries POST with those items.

Example 200 (fixture)

{
  "count": 2,
  "path": "/api/calc/crafft",
  "items": [
    {
      "components": [
        {
          "factor": "car",
          "points": 0,
          "present": false
        },
        {
          "factor": "relax",
          "points": 0,
          "present": false
        },
        {
          "factor": "alone",
          "points": 0,
          "present": false
        },
        {
          "factor": "forget",
          "points": 0,
          "present": false
        },
        {
          "factor": "friends",
          "points": 0,
          "present": false
        },
        {
          "factor": "trouble",
          "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": "Knight JR, Sherritt L, Shrier LA, Harris SK, Chang G",
        "doi": "10.1001/archpedi.156.6.607",
        "id": "knight-2002",
        "pmid": "12038895",
        "source": "Arch Pediatr Adolesc Med. 2002;156(6):607-614",
        "title": "Validity of the CRAFFT substance abuse screening test among adolescent clinic patients"
      },
      "formula": "crafft",
      "formula_expression": "CRAFFT = car + relax + alone + forget + friends + trouble; each 1 if true; max 6",
      "max_score": 6,
      "score": 0,
      "screen_positive": false
    },
    {
      "components": [
        {
          "factor": "car",
          "points": 0,
          "present": false
        },
        {
          "factor": "relax",
          "points": 0,
          "present": false
        },
        {
          "factor": "alone",
          "points": 0,
          "present": false
        },
        {
          "factor": "forget",
          "points": 0,
          "present": false
        },
        {
          "factor": "friends",
          "points": 0,
          "present": false
        },
        {
          "factor": "trouble",
          "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": "Knight JR, Sherritt L, Shrier LA, Harris SK, Chang G",
        "doi": "10.1001/archpedi.156.6.607",
        "id": "knight-2002",
        "pmid": "12038895",
        "source": "Arch Pediatr Adolesc Med. 2002;156(6):607-614",
        "title": "Validity of the CRAFFT substance abuse screening test among adolescent clinic patients"
      },
      "formula": "crafft",
      "formula_expression": "CRAFFT = car + relax + alone + forget + friends + trouble; each 1 if true; max 6",
      "max_score": 6,
      "score": 0,
      "screen_positive": false
    }
  ]
}

Response

Field Type Description
formula string crafft
formula_expression string Exact expression used
score integer CRAFFT points 0-6
max_score integer 6
screen_positive boolean true iff score ≥ 2 (Knight 2002: optimal cutoff for any problem / any disorder / dependence). Not a diagnosis.
components array Per-item points
citation object Knight Arch Pediatr Adolesc Med 2002 citation
disclaimer string Not-a-device notice

Example JSON

Machine form of the same example. Frozen fixture. Not a live lookup. 

{
  "components": [
    {
      "factor": "car",
      "points": 0,
      "present": false
    },
    {
      "factor": "relax",
      "points": 0,
      "present": false
    },
    {
      "factor": "alone",
      "points": 0,
      "present": false
    },
    {
      "factor": "forget",
      "points": 0,
      "present": false
    },
    {
      "factor": "friends",
      "points": 0,
      "present": false
    },
    {
      "factor": "trouble",
      "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": "Knight JR, Sherritt L, Shrier LA, Harris SK, Chang G",
    "doi": "10.1001/archpedi.156.6.607",
    "id": "knight-2002",
    "pmid": "12038895",
    "source": "Arch Pediatr Adolesc Med. 2002;156(6):607-614",
    "title": "Validity of the CRAFFT substance abuse screening test among adolescent clinic patients"
  },
  "formula": "crafft",
  "formula_expression": "CRAFFT = car + relax + alone + forget + friends + trouble; each 1 if true; max 6",
  "max_score": 6,
  "score": 0,
  "screen_positive": false
}

Client errors (HTTP 400)

Invalid params return 400 without charge. Shared HTTP 402 and 503 meanings: Payments.

HTTP Code When
400 invalid_flag boolean clinical flags must be true or false Returned before settlement; you are not charged.
400 invalid_items POST body must be a JSON object with only an items array Returned before settlement; you are not charged.
400 invalid_item_count items must be an array of 1 to 25 objects Returned before settlement; you are not charged.
400 invalid_item each items entry must be a JSON object Returned before settlement; you are not charged.

Related tools

  • CAGE — Sum the four Ewing 1984 CAGE items and return whether two or more answers are affirmative.
  • AUDIT-C — Sum three caller-assigned Bush 1998 AUDIT-C integers (0-4) and return this paper's ≥3 and ≥4 screens.
  • SCOFF — Sum the five Morgan 1999 SCOFF items and return whether two or more answers are affirmative.

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. Unpaid valid requests return HTTP 402 with a base64 PAYMENT-REQUIRED header. HTTP 503 is not a new quote: retry the same PAYMENT-SIGNATURE. Full handshake and shared payment errors: Payments. Stdio MCP: /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.