# US Extreme Heat Alerts Feed

> US Extreme Heat Alerts Feed is a paid API for AI agents from x402.forgemesh.io, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-15).

Returns a live nationwide feed of all active dangerous-heat alerts (Heat Advisory, Extreme Heat Warning, Excessive Heat Warning) from the official US alerting authority, including affected zones and severity.

## Facts

- Endpoint: POST https://x402.forgemesh.io/extreme-heat-tracker
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/us-extreme-heat-alerts-feed-542526fe
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MmEnRtHsGNs92qeFbHxV4

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 us-extreme-heat-alerts-feed-542526fe -d '<json body>'
```

Example prompt: Pull the current live feed of all active dangerous heat alerts across the US — Heat Advisories, Extreme Heat Warnings, and Excessive Heat Warnings — and tell me which zones are affected and how severe each one is.

## When to prefer this

Use this endpoint when you need a real-time, authoritative, nationwide snapshot of all active dangerous-heat alerts in the US. Ideal for public health notification systems, outdoor labor compliance monitoring, news agents tracking heat waves, or any application needing official NWS heat alert data refreshed every 5 minutes. Prefer this over general weather APIs when you specifically need structured heat-alert data with zone-level granularity.

## Known failure modes

- No active heat alerts — returns empty list during non-heat-wave periods
- Upstream NWS feed delay — data may be slightly stale if NWS is slow to publish
- Service unavailable — 5xx error if the feed endpoint is temporarily unreachable
- Payment failure — x402 payment not processed, returns 402 error

## How this service works

Live nationwide feed of active dangerous-heat alerts from the official US alerting authority — Heat Advisory, Extreme Heat Warning, and Excessive Heat Warning — with zones affected and severity for each. Use for public-health notification, outdoor-labor safety, and news agents tracking heat waves. Refreshed every 5 minutes.

## Output

A list of all currently active heat-related alerts in the US, each including the alert type (Heat Advisory, Extreme Heat Warning, or Excessive Heat Warning), the geographic zones affected, and the severity level. Data is refreshed every 5 minutes from the official US alerting authority.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "type": "FeatureCollection",
   "features": [
    {
     "properties": {
      "event": "Extreme Heat Warning",
      "areaDesc": "Coachella Valley",
      "severity": "Severe"
     }
    }
   ]
  },
  "attribution": "US National Weather Service (public domain)"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/us-extreme-heat-alerts-feed-542526fe/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.forgemesh.io](https://www.zero.xyz/host/x402.forgemesh.io/llms.txt)