# Wildfire Causal-Chain Gauge (Region)

> Wildfire Causal-Chain Gauge (Region) is a paid API for AI agents from aeml-x402.zeabur.app, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-13).

Returns a real-time wildfire causal-chain snapshot for a US fire-risk region, combining fire-weather conditions, active NASA FIRMS satellite hotspots, and downstream smoke/PM2.5 air quality into a sequentially verified narrative.

## Facts

- Endpoint: GET https://aeml-x402.zeabur.app/gauge/wildfire-region
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/wildfire-causal-chain-gauge-region-1ef36733
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_X1pdXtKMSD7jMaF5eK5wy

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 wildfire-causal-chain-gauge-region-1ef36733
```

Example prompt: Can you pull the full wildfire causal-chain gauge for us-california right now — fire weather, active NASA satellite hotspots, and smoke PM2.5 — and tell me how the signals line up sequentially?

## When to prefer this

Choose this endpoint when you need a pre-integrated, causally sequenced wildfire intelligence bundle for a US region — combining fire-weather (upstream leading), NASA FIRMS satellite hotspots (current), and PM2.5 smoke (downstream cross-validation) in a single call with provenance and verifiability guarantees. Prefer this over assembling individual weather, satellite, or AQI APIs when the goal is causal-chain narrative for insurers, utilities making PSPS decisions, logistics operators, or agricultural risk managers who need screening-level situational awareness with official-source traceability, not raw data assembly.

## Known failure modes

- Invalid or unsupported entity key returns an error or empty legs
- NASA FIRMS data delayed by satellite pass timing — data_age_hours may be elevated
- Stale fire-weather data flagged in provenance as 'stale' rather than 'fresh'
- Payment not received or x402 authorization failure blocks response
- PM2.5 source temporarily unavailable — leg may be missing or flagged
- Region entity key format incorrect (must match expected slug like us-california)

## How this service works

[3-LEG] Wildfire chain, one fire-risk region (?entity=us-california): leading fire weather - hot, dry and windy -> current active fire detections from NASA FIRMS satellite thermal anomalies -> realized downwind smoke impact (confirmation gate). A sequential chain, not one reading - confidence = how many legs are lit, in order. Sources: NASA FIRMS, NWS, EPA. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed.

## Output

A structured JSON object with: per-leg readings (fire-weather/heat-wind, NASA FIRMS hotspot count/intensity, PM2.5 smoke level) each with current value, observed_at timestamp, data age, and record hash; a cross-line causal narrative describing sequential signal activation; provenance block with freshness classification and data lineage traceable to official sources; scope/grade disclosures noting screening-level quality; optional decision_points for re-running with alternate region tags; and an Ed25519-signed citation for zero-trust offline verification.

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "type": {
     "const": "http"
    },
    "method": {
     "type": "string",
     "enum": [
      "GET"
     ]
    },
    "queryParams": {
     "type": "object",
     "additionalProperties": false,
     "properties": {
      "entity": {
       "type": "string",
       "description": "required - monitored object id, paired with signal_id; free list at GET /gauge/catalog?signal_id=<signal_id> -> signals[0].entities[]",
       "examples": [
        "us-california",
        "us-pacific-northwest",
        "us-southwest",
        "us-rockies",
        "canada-bc",
        "canada-alberta"
       ],
       "x-accepted-values": {
        "shown": 6,
        "total": 12,
        "all": "https://api.truthbear.co/schemas/gauge-wildfire-region.input.json"
       }
      }
     },
     "required": [
      "entity"
     ]
    }
   },
   "required": [
    "type",
    "method",
    "queryParams"
   ]
  },
  "output": {
   "type": "object",
   "properties": {
    "type": {
     "const": "json"
    },
    "example": {}
   },
   "required": [
    "type"
   ]
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/wildfire-causal-chain-gauge-region-1ef36733/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from aeml-x402.zeabur.app](https://www.zero.xyz/host/aeml-x402.zeabur.app/llms.txt)