# Aviation Crosswind Calculator

> Aviation Crosswind Calculator is a paid API for AI agents from aviationapis.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Computes crosswind and headwind components for a given runway heading and wind condition

## Facts

- Endpoint: POST https://aviationapis.com/crosswind
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/aviation-crosswind-calculator-07d91558
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_iWfDa1sUQMnTKQcieMzoj

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 aviation-crosswind-calculator-07d91558 -d '<json body>'
```

Example prompt: What are the crosswind and headwind components if the wind is 310 degrees at 18 knots and I'm landing on runway 28 (heading 280 degrees)?

## When to prefer this

Use this endpoint when you need a precise mathematical decomposition of wind into crosswind and headwind/tailwind components for a specific runway, particularly in aviation planning, pre-flight briefing, or automated flight operation workflows. Prefer this over manual trigonometry or generic wind APIs that don't understand runway-relative wind components.

## Known failure modes

- Missing required fields (wind_speed_kt, runway_heading_deg, wind_direction_deg) result in a 400 error
- Invalid degree values outside 0–360 may produce incorrect results or an error
- Payment failure via x402 protocol returns a 402 Payment Required response
- Values outside realistic aviation ranges may produce unexpected outputs

## How this service works

Calculates crosswind for aviation runways and flight operations.

## Output

Returns a JSON object with headwind component in knots, crosswind component in knots, which side the crosswind is from (left or right), the angle off the nose in degrees, the original wind speed, runway heading, wind direction, and a boolean indicating whether it is a tailwind situation.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "wind_speed_kt": {
   "type": "number",
   "description": "Wind speed in knots"
  },
  "runway_heading_deg": {
   "type": "number",
   "description": "Runway magnetic/true heading in degrees (e.g. 280 for runway 28)"
  },
  "wind_direction_deg": {
   "type": "number",
   "description": "Wind direction in degrees"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "tailwind": false,
  "headwind_kt": 15.6,
  "crosswind_kt": 9,
  "wind_speed_kt": 18,
  "crosswind_from": "right",
  "angle_off_nose_deg": 30,
  "runway_heading_deg": 280,
  "wind_direction_deg": 310
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/aviation-crosswind-calculator-07d91558/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from aviationapis.com](https://www.zero.xyz/host/aviationapis.com/llms.txt)