# SYNTHORA Marine Wave Forecast

> SYNTHORA Marine Wave Forecast is a paid API for AI agents from api.hergertsynthora.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-14).

Returns sea state forecasts (wave height, period, swell, Douglas-scale verdict, navigability flag) for any coastal location or major maritime chokepoint

## Facts

- Endpoint: POST https://api.hergertsynthora.com/v1/marine-wave-forecast
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synthora-marine-wave-forecast-c51319bb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_g5-6ugtp6VU4wBsWKsG0q

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 synthora-marine-wave-forecast-c51319bb -d '<json body>'
```

Example prompt: What's the current sea state at the Strait of Hormuz — give me wave height, swell, the Douglas scale verdict, and whether it's navigable for shipping?

## When to prefer this

Use this endpoint when you need a fast, low-cost ($0.005 USDC) marine wave forecast with a pre-packaged Douglas scale verdict and navigability flag for key global chokepoints or arbitrary coastal locations — especially when combining with shipping disruption market signals or freight routing logic. Prefer over raw open-meteo Marine API calls when you need the chokepoint presets, Douglas classification, and navigability flag without custom parsing.

## Known failure modes

- Unrecognized location string that is neither a preset chokepoint name nor parseable coordinates returns an error
- Locations far inland or with no marine coverage return empty or invalid results
- Model data may have latency gaps during ECMWF/NOAA update cycles
- Forecast accuracy degrades beyond 7-10 day horizon
- Ambiguous port names without coordinates may resolve incorrectly

## How this service works

SYNTHORA marine-wave-forecast: sea state for any coast/port or chokepoint (Hormuz, Suez, Panama, Malacca, Gibraltar, Bab el-Mandeb, Dover presets) — wave height, period, swell, Douglas-scale verdict and navigability flag. Complements chokepoint-transits for shipping disruption markets. Source: open-meteo Marine (ECMWF/NOAA WaveWatch III, no key). $0.005 USDC x402 Base.

## Output

Returns structured sea state data including significant wave height, dominant wave period, swell direction and height, a Douglas sea scale categorical verdict (e.g. 'Rough', 'Moderate'), and a boolean navigability flag indicating whether conditions are safe for vessel transit. Data is sourced from ECMWF and NOAA WaveWatch III models via open-meteo Marine.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "input": {
   "type": "string",
   "description": "SYNTHORA marine-wave-forecast: sea state for any coast/port or chokepoint (Hormuz, Suez, Panama, Malacca, Gibraltar, Bab el-Mandeb, Dover presets) — wave height, period, swell, Douglas-scale verdict a"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synthora-marine-wave-forecast-c51319bb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.hergertsynthora.com](https://www.zero.xyz/host/api.hergertsynthora.com/llms.txt)