# Katz Index of Independence in Activities of Daily Living (ADL) Calculator

> Katz Index of Independence in Activities of Daily Living (ADL) Calculator is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Computes the Katz 1963 ADL independence score (0–6) by summing six caller-assigned boolean independence flags: bathing, dressing, toileting, transferring, continence, and feeding.

## Facts

- Endpoint: GET https://api.magentlab.com/api/calc/katz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/katz-index-of-independence-in-activities-of-daily-living-adl-calculator-840806d2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Zaad4v8ttwPDrOeFqyFDb

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability katz-index-of-independence-in-activities-of-daily-living-adl-calculator-840806d2
```

Example prompt: Calculate the Katz ADL score for a patient who is independent in bathing, dressing, and feeding, but dependent in toileting, transferring, and continence.

## When to prefer this

Use this endpoint when you need a fast, reproducible computation of the published Katz 1963 ADL 0–6 integer score from six already-assessed boolean independence flags. Prefer it over manual summation in automated pipelines, EHR integrations, or research workflows where consistent scoring logic matters. Do not use it as a substitute for clinical assessment, as a Barthel Index calculator, as a Katz letter-grade (A–G) classifier, or as input to a placement or rehabilitation decision — those are distinct clinical functions.

## Known failure modes

- Missing required boolean flags — returns validation error if any of the six query parameters are absent
- Non-boolean values passed for flags — schema validation failure
- Payment failure via x402 — 402 response if USDC payment is not processed
- Network timeout — transient 5xx if the API is unreachable

## How this service works

Katz 1963 Index of Independence in Activities of Daily Living: six caller-assigned independence flags (bathing, dressing, toileting, transferring, continence, feeding). Each independent function scores 1; max 6. magent sums the published 0–6 count and does not observe the patient. Not the Barthel Index, not Katz letter grades A–G, and not a rehab order or placement decision. Not a medical device.

## Output

Returns a numeric Katz ADL total score from 0 to 6, where each of the six independence flags (bathing, dressing, toileting, transferring, continence, feeding) contributes 1 point if true and 0 if false. The endpoint sums the caller-supplied values only; it does not observe or evaluate the patient.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "headers": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    },
    "queryParams": {
     "type": "object",
     "required": [
      "bathing_independent",
      "dressing_independent",
      "toileting_independent",
      "transferring_independent",
      "continence_independent",
      "feeding_independent"
     ],
     "properties": {
      "bathing_independent": {
       "type": "boolean",
       "description": "Caller-assigned Katz 1963 bathing independence (sponge, shower, or tub). true scores 1; false scores 0. magent does not observe the patient."
      },
      "feeding_independent": {
       "type": "boolean",
       "description": "Caller-assigned Katz 1963 feeding independence (gets food from plate into mouth; precutting of meat may be done by another). true scores 1; false scores 0. magent does not observe the patient."
      },
      "dressing_independent": {
       "type": "boolean",
       "description": "Caller-assigned Katz 1963 dressing independence (gets clothes and puts on garments; may have help tying shoes). true scores 1; false scores 0. magent does not observe the patient."
      },
      "toileting_independent": {
       "type": "boolean",
       "description": "Caller-assigned Katz 1963 toileting independence (goes to toilet, gets on and off, arranges clothes, cleans self). true scores 1; false scores 0. magent does not observe the patient."
      },
      "continence_independent": {
       "type": "boolean",
       "description": "Caller-assigned Katz 1963 continence independence (controls urination and bowel movement completely by self). true scores 1; false scores 0. magent does not observe the patient."
      },
      "transferring_independent": {
       "type": "boolean",
       "description": "Caller-assigned Katz 1963 transferring independence (moves in and out of bed and chair; may use an object for support). true scores 1; false scores 0. magent does not observe the patient."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "requ
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/katz-index-of-independence-in-activities-of-daily-living-adl-calculator-840806d2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.magentlab.com](https://www.zero.xyz/host/api.magentlab.com/llms.txt)