# Saylor Innovations BAC Calculator

> Saylor Innovations BAC Calculator is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).

Estimates blood alcohol concentration using the Widmark formula, with sobering time and legal limit references, given weight, sex, drinks consumed, and hours elapsed

## Facts

- Endpoint: GET https://saylorinnovations.com/api/health/bac?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-bac-calculator-f4d44385
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cw7jypXdPCewFShy1Rzuo

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 saylor-innovations-bac-calculator-f4d44385
```

Example prompt: I'm a 75 kg male who had 4 standard drinks starting 2 hours ago — can you estimate my blood alcohol concentration right now and tell me how long until I'd be under 0.08%?

## When to prefer this

Use this endpoint when you need a quick, formula-based BAC estimate using the well-established Widmark method, particularly when you need sobering time and legal limit context in a single call. Prefer it over general health APIs when the user has specific weight, sex, and drink count data and needs actionable safety guidance.

## Known failure modes

- Missing required parameters (weight_kg, sex, drinks) returns an error
- Invalid or non-numeric weight/drinks values may cause computation errors
- Negative hours or unrealistic drink counts may yield unexpected results
- The estimate is a formula approximation and will note caveats about individual variation

## How this service works

Estimated blood alcohol concentration from weight, sex, drinks and hours using the Widmark formula, with sobering time and legal limit references

## Output

Returns estimated current BAC as a percentage, peak BAC, alcohol grams consumed, intoxication level label, hours until sober, hours until below 0.08% legal limit, legal limit references by jurisdiction, and a caveat note about estimation accuracy — along with the input values used in the Widmark formula calculation.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "weight_kg",
      "sex",
      "drinks"
     ],
     "properties": {
      "sex": {
       "type": "string",
       "description": "male or female"
      },
      "hours": {
       "type": "string",
       "description": "optional hours since the first drink, default 0"
      },
      "drinks": {
       "type": "string",
       "description": "Standard drinks consumed (14 g alcohol each)"
      },
      "weight_kg": {
       "type": "string",
       "description": "Body weight in kg"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "inputs",
      "estimated_bac_percent_now",
      "level"
     ],
     "properties": {
      "note": {
       "type": "string",
       "description": "Caveat or context for reading the result"
      },
      "level": {
       "type": "string",
       "description": "Level"
      },
      "inputs": {
       "type": "object",
       "properties": {
        "sex": {
         "type": [
          "string",
          "null"
         ],
         "description": "Sex used in the Widmark formula"
        },
        "weight_kg": {
         "type": [
          "number",
          "null"
         ],
         "description": "Weight in kilograms"
        },
        "hours_elapsed": {
         "type": [
          "number",
          "null"
         ],
         "description": "Hours elapsed"
        },
        "standard_drinks": {
         "type": [
          "number",
          "null"
         ],
         "description": "Standard drinks"
        }
       },
       "description": "Inputs used: weight, sex, standard drinks and hours since first drink"
      },
      "source": {
       "type": "string",
       "description": "Data source the values come from"
      },
      "alcohol_grams": {
       "type": "number",
       "description": "Alcohol grams"
      },
      "peak_bac_per
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-bac-calculator-f4d44385/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)