# HVAC Energy Demand Index

> HVAC Energy Demand Index is a paid API for AI agents from store.cryptotradecalc.com, paid per call via x402, $0.015/call, status unknown (last checked 2026-09-13).

Predicts peak apparent temperature exposure and natural convective cooling window availability over the next week for a given city location.

## Facts

- Endpoint: GET https://store.cryptotradecalc.com/api/hvac-energy-demand
- Price: $0.015/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/hvac-energy-demand-index-52530d5f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_C0W9zwI5wAC46ytt9gaIV

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 hvac-energy-demand-index-52530d5f
```

Example prompt: What's the HVAC energy demand forecast for Phoenix over the next week — specifically when peak apparent temperatures are expected and whether there are any natural convective cooling windows where I can avoid running AC?

## When to prefer this

Use this endpoint when you need a week-ahead HVAC-specific energy demand signal combining felt-temperature (apparent temperature) peaks and natural cooling availability windows — more specialized than a generic weather forecast. Ideal for building managers, energy planners, smart home automation, or sustainability applications that need to optimize cooling system usage.

## Known failure modes

- Missing or unrecognized city name returns an error or empty result
- City not geocodable — ambiguous city name with no match
- Weather data unavailable for remote or unsupported locations
- Invalid query parameter format causes 400 Bad Request
- Payment not processed or x402 payment failure returns 402

## How this service works

hvac-energy-demand-index: HVAC Energy Demand Index – predicts peak apparent temperature exposure and natural convective cooling window availability over the next week for a given location.

## Output

Returns a week-long HVAC Energy Demand Index for the specified city, including predicted peak apparent temperature exposure periods and time windows where natural convective cooling is available as an alternative to mechanical air conditioning.

## 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",
     "properties": {
      "city": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/hvac-energy-demand-index-52530d5f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from store.cryptotradecalc.com](https://www.zero.xyz/host/store.cryptotradecalc.com/llms.txt)