# Falling Tree Risk Assessment

> Falling Tree Risk Assessment (fallingtreerisk.com) is an AI-powered REST API and web application that predicts the probability of trees falling on a specific US property. It analyzes historical storm frequency, wind speed, precipitation records, and satellite tree coverage density to estimate an annual risk probability with confidence intervals. Coverage: all 50 US states and territories.

## What This Service Offers

- Annual falling tree risk probability with 90% confidence bounds
- Risk level categories: Very Low, Low, Medium, High, Very High
- Historical storm count, max wind speed, and max 24-hour precipitation for the property
- JSON responses designed for integration into real estate, insurance, property management, and home inspection tools
- Free tier: 20 assessments per month (no credit card required)

## API Reference

**Base URL:** `https://api.fallingtreerisk.com/v1/`

### Authentication

All API requests require an API key. Pass it as a query parameter:

```
?api_key=YOUR_API_KEY
```

Get a free API key (20 requests/month) at: https://fallingtreerisk.com/account

### GET /getFallingTreeRisk

Returns a full falling tree risk assessment for a US property address.

**Query Parameters:**
- `address` (string, required) — Full US property address. Example: `123 Main St, Portland, OR 97201`
- `api_key` (string, required) — Your API key

**Example Request:**
```
GET https://api.fallingtreerisk.com/v1/getFallingTreeRisk?address=123+Main+St%2C+Portland%2C+OR+97201&api_key=YOUR_API_KEY
```

**Response Fields (JSON):**
- `risk_level` (string) — One of: `"Very Low"`, `"Low"`, `"Medium"`, `"High"`, `"Very High"`
- `property_risk_annual` (number) — Annual probability as a decimal (e.g., `0.0042` = 0.42%)
- `property_risk_annual_low` (number) — Lower bound of 90% confidence interval
- `property_risk_annual_high` (number) — Upper bound of 90% confidence interval
- `num_storms_2_years` (integer) — Number of significant storms recorded near the property in the past 2 years
- `max_wind_speed_kmh` (number) — Maximum historical wind speed in km/h
- `max_precipitation_24h_mm` (number) — Maximum historical 24-hour precipitation in mm

**Risk Level Thresholds:**
- Very Low: < 0.1% annual probability
- Low: 0.1% – 0.5%
- Medium: 0.5% – 1.0%
- High: 1.0% – 2.0%
- Very High: ≥ 2.0%

**Example Response:**
```json
{
  "risk_level": "Low",
  "property_risk_annual": 0.0031,
  "property_risk_annual_low": 0.0018,
  "property_risk_annual_high": 0.0052,
  "num_storms_2_years": 4,
  "max_wind_speed_kmh": 87.3,
  "max_precipitation_24h_mm": 62.1
}
```

## Pricing

| Plan | Price | Limit |
|------|-------|-------|
| Free | $0/month | 20 assessments/month |
| Professional | $0.20/property | Up to 1,000/month (first 20 free) |
| Enterprise | Custom | Unlimited, volume discounts, white-label |

## Limitations

- Does not model individual tree health or species
- Does not account for soil conditions (drainage, erosion)
- For high-stakes decisions, supplement with a certified arborist inspection

## Key Pages

- [Home / Try the tool](https://fallingtreerisk.com/) — Interactive web interface to assess any US address
- [Pricing](https://fallingtreerisk.com/pricing) — API pricing plans and billing details
- [FAQ](https://fallingtreerisk.com/faq) — Methodology, accuracy, coverage, terms, and privacy
- [Tree Risk Mitigation Guide](https://fallingtreerisk.com/tree-risk-mitigation) — How to reduce tree fall risk
- [Get API Key](https://fallingtreerisk.com/account) — Sign up and manage API keys
- [Contact](https://fallingtreerisk.com/contact) — Support and enterprise sales
- [OpenAPI Spec](https://fallingtreerisk.com/openapi.json) — Machine-readable API specification (OpenAPI 3.0)