# US Excessive Heat Warnings Feed

> US Excessive Heat Warnings 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 all active Heat Advisories, Extreme Heat Warnings, and Excessive Heat Warnings across the United States with affected zones and full official alert text.

## Facts

- Endpoint: POST https://x402.forgemesh.io/excessive-heat-warnings
- 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-excessive-heat-warnings-feed-566de9c9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TV0EPZ4VL0bQ9vrkpnK_5

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-excessive-heat-warnings-feed-566de9c9 -d '<json body>'
```

Example prompt: Pull up all the excessive heat warnings and heat advisories currently active anywhere in the US — I need the affected zones and the full alert text so I can check if our outdoor construction crews are in any danger today.

## When to prefer this

Use this endpoint when you need a single, comprehensive snapshot of all active heat-related NWS alerts across the entire United States, especially for safety automation, event risk assessment, field crew management, or delivery/construction scheduling that depends on heat conditions. Prefer this over general weather APIs when you specifically need official government-issued heat warning and advisory status with zone-level granularity.

## Known failure modes

- No active heat alerts returns an empty list (not an error)
- Payment failure or insufficient USDC balance results in 402 response
- NWS upstream feed unavailability may return a 503 or stale data
- Malformed POST body may return a 400 validation error

## How this service works

All Heat Advisories, Extreme Heat Warnings, and Excessive Heat Warnings currently in effect anywhere in the United States, with the specific zones affected and the full official US government alert feed alert text. For heat-safety automation, outdoor-event risk checks, and delivery/construction scheduling agents.

## Output

A structured list of all currently active Heat Advisories, Extreme Heat Warnings, and Excessive Heat Warnings in the United States, including the specific geographic zones affected and the complete official NWS alert text for each warning.

## 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-excessive-heat-warnings-feed-566de9c9/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)