# Stormglass

**Canonical:** https://apis.io/providers/stormglass/  
**Website:** https://stormglass.io/  
**APIs profiled:** 7

Stormglass provides a global marine and weather API delivering high-resolution forecasts, historical data, and environmental measurements for any coordinate on Earth. The platform aggregates data from multiple authoritative sources including NOAA, ECMWF, DWD, and others to provide weather point forecasts, marine data, tidal information, solar and astronomical data, biological oceanographic data, and elevation/bathymetry data. Used widely for maritime navigation, renewable energy forecasting, outdoor activity planning, and environmental monitoring applications.

## Kin Score — 43.5 / 100 (developing)

Scored 2026-08-21 under rubric 0.12.0. Trend: flat (+0.4 from 43.1).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 68.2 |
| Governance | 13.6 |
| Contract Governance | 13.6 |
| Operational Transparency | 13.2 |
| Developer Ergonomics | 28.6 |
| Commercial Clarity | 50.0 |
| Access Clarity | 50.0 |

## Agent readiness — 34.7 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | na |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | na |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | na |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (7)

- **Stormglass Astronomy API** — Solar and lunar astronomical data including sunrise, sunset, moon phases
- **Stormglass Bio API** — Biological and oceanographic data including chlorophyll and nutrients
- **Stormglass Elevation API** — Global elevation and bathymetry data
- **Stormglass Marine API** — Marine environment data including waves, currents, and water temperature
- **Stormglass Solar API** — Solar radiation and UV index data
- **Stormglass Tides API** — Tidal data including extremes, sea level, and tide station listings
- **Stormglass Weather API** — Point weather forecasts and historical weather data

## Agentic access (1)

- **Stormglass Agentic Access** — 10 operations

## Security (2)

- **Stormglass Authentication** — apiKey · 1 scheme
- **Stormglass Domain Security** — TLSv1.3 · DMARC

## Plans (1)

- **Stormglass Plans Pricing**

## Tags

Astronomy, Bio, Climate, Elevation, Forecasting, Marine, Ocean, Solar, Tides, Weather, Wind

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/stormglass/). Scores are computed from the provider's own public artifacts under a published rubric.