Emergency · LIVE

HARK questionnaire

HARK

Sum the four Sohal 2007 HARK items and return whether one or more answers are affirmative.

LIVE $0.005 USDC GET /api/calc/hark

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

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

What it computes

Sum the four Sohal 2007 HARK items and return whether one or more answers are affirmative.

When to use

When an agent needs the published HARK point total and Sohal 2007 ≥1 screen and must not invent a diagnosis of intimate partner violence or interview the patient.

When not to use

• Not a medical device and not a diagnosis of intimate partner violence.
• magent does not interview the patient.
• The caller assigns each flag. magent does not interpret individual items.
• This is Sohal 2007 HARK only (four yes/no flags; screen-positive at score ≥1). Not HITS 1-5 scoring. magent does not apply the AAS pregnancy item (HARK removed it).

Formula

HARK = humiliation + afraid + rape + kick; each 1 if true; max 4

Citation

Title

The sensitivity and specificity of four questions (HARK) to identify intimate partner violence: a diagnostic accuracy study in general practice

Authors

Sohal H, Eldridge S, Feder G

Source

BMC Fam Pract. 2007;8:49

DOI

10.1186/1471-2296-8-49

Worked example

Also searched as

• HARK
• HARK questionnaire
• Sohal HARK
• humiliation afraid rape kick
• HARK score
• intimate partner violence screen
• Sohal 2007 HARK
• IPV four questions

Try

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

/api/calc/hark?humiliation=false&afraid=false&rape=false&kick=false

Full URL: https://api.magentlab.com/api/calc/hark?humiliation=false&afraid=false&rape=false&kick=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/hark?humiliation=false&afraid=false&rape=false&kick=false"

Parameters

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/hark 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": [
    {
      "afraid": "false",
      "humiliation": "false",
      "kick": "false",
      "rape": "false"
    },
    {
      "afraid": "false",
      "humiliation": "false",
      "kick": "false",
      "rape": "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/hark",
  "items": [
    {
      "components": [
        {
          "factor": "humiliation",
          "points": 0,
          "present": false
        },
        {
          "factor": "afraid",
          "points": 0,
          "present": false
        },
        {
          "factor": "rape",
          "points": 0,
          "present": false
        },
        {
          "factor": "kick",
          "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": "Sohal H, Eldridge S, Feder G",
        "doi": "10.1186/1471-2296-8-49",
        "id": "sohal-2007",
        "pmid": "17727730",
        "source": "BMC Fam Pract. 2007;8:49",
        "title": "The sensitivity and specificity of four questions (HARK) to identify intimate partner violence: a diagnostic accuracy study in general practice"
      },
      "formula": "hark",
      "formula_expression": "HARK = humiliation + afraid + rape + kick; each 1 if true; max 4",
      "max_score": 4,
      "score": 0,
      "screen_positive": false
    },
    {
      "components": [
        {
          "factor": "humiliation",
          "points": 0,
          "present": false
        },
        {
          "factor": "afraid",
          "points": 0,
          "present": false
        },
        {
          "factor": "rape",
          "points": 0,
          "present": false
        },
        {
          "factor": "kick",
          "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": "Sohal H, Eldridge S, Feder G",
        "doi": "10.1186/1471-2296-8-49",
        "id": "sohal-2007",
        "pmid": "17727730",
        "source": "BMC Fam Pract. 2007;8:49",
        "title": "The sensitivity and specificity of four questions (HARK) to identify intimate partner violence: a diagnostic accuracy study in general practice"
      },
      "formula": "hark",
      "formula_expression": "HARK = humiliation + afraid + rape + kick; each 1 if true; max 4",
      "max_score": 4,
      "score": 0,
      "screen_positive": false
    }
  ]
}

Response

Example JSON

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

{
  "components": [
    {
      "factor": "humiliation",
      "points": 0,
      "present": false
    },
    {
      "factor": "afraid",
      "points": 0,
      "present": false
    },
    {
      "factor": "rape",
      "points": 0,
      "present": false
    },
    {
      "factor": "kick",
      "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": "Sohal H, Eldridge S, Feder G",
    "doi": "10.1186/1471-2296-8-49",
    "id": "sohal-2007",
    "pmid": "17727730",
    "source": "BMC Fam Pract. 2007;8:49",
    "title": "The sensitivity and specificity of four questions (HARK) to identify intimate partner violence: a diagnostic accuracy study in general practice"
  },
  "formula": "hark",
  "formula_expression": "HARK = humiliation + afraid + rape + kick; each 1 if true; max 4",
  "max_score": 4,
  "score": 0,
  "screen_positive": false
}

Client errors (HTTP 400)

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

Related tools

• HITS — Sum four caller-assigned Sherin 1998 HITS integers (hurt, insult, threaten, scream; each 1-5) and return the published total (4-20) and ≥10 screen.
• PHQ-9 — Sum nine caller-assigned Kroenke 2001 PHQ-9 integers (0-3) and return the published total (max 27), severity cutpoints, and ≥10 screen.
• GAD-7 — Sum seven caller-assigned Spitzer 2006 GAD-7 integers (0-3) and return the published 0-21 total, 5/10/15 severity cuts, and ≥10 case-finding flag.

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.