# Levothyroxine Full-Replacement Dose Estimator (ATA 2014)

> Levothyroxine Full-Replacement Dose Estimator (ATA 2014) is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Calculates the adult full-replacement levothyroxine (LT4) daily dose in micrograms using the ATA 2014 formula: weight_kg × 1.6, accepting weight in kg or lb.

## Facts

- Endpoint: GET https://api.magentlab.com/api/calc/levothyroxine_dose
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/levothyroxine-full-replacement-dose-estimator-ata-2014-b491a868
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5fvlgsKdlpYtUnEJlO_ri

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 levothyroxine-full-replacement-dose-estimator-ata-2014-b491a868
```

Example prompt: What's the estimated full-replacement levothyroxine dose for an adult patient weighing 70 kg, using the ATA 2014 formula?

## When to prefer this

Choose this endpoint when you need a quick, deterministic, evidence-based levothyroxine full-replacement estimate grounded in the published ATA 2014 arithmetic (1.6 mcg/kg). Prefer it over general LLM reasoning when reproducibility and citation traceability matter. Not suitable for titration-based dosing, pediatric patients, pregnancy, or when lean body mass adjustment is required.

## Known failure modes

- Weight out of accepted range (weight_kg < 1 or > 500; weight_lb < 2 or > 1100) returns validation error
- Neither weight_kg nor weight_lb provided returns missing parameter error
- Non-numeric weight value returns type error
- Payment not included or insufficient USDC results in 402 payment required

## How this service works

Adult levothyroxine (LT4) full-replacement estimate: daily_lt4_mcg = weight_kg * 1.6 (ATA 2014). Weight in kg or lb. Not a prescription, TSH titration, pediatric or pregnancy-specific dose, or tablet strength. Lean-body-mass adjustment may apply; elderly and cardiac patients often start lower. Deterministic published arithmetic with citation.

## Output

Returns the estimated full-replacement levothyroxine daily dose in micrograms, computed as weight_kg × 1.6 per the ATA 2014 guideline. Includes the citation and notes that this is not a prescription, does not account for TSH titration, lean body mass adjustment, pediatric or pregnancy-specific dosing, or tablet rounding.

## 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": [],
     "properties": {
      "weight_kg": {
       "type": "number",
       "description": "Weight in kilograms (1-500). Provide weight_kg or weight_lb."
      },
      "weight_lb": {
       "type": "number",
       "description": "Weight in pounds (2-1100). Converted as kg = lb * 0.45359237."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/levothyroxine-full-replacement-dose-estimator-ata-2014-b491a868/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)