Stormglass

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.

Stormglass publishes 7 APIs on the APIs.io network, including Astronomy API, Bio API, Elevation API, and 4 more. Tagged areas include Astronomy, Bio, Climate, Elevation, and Forecasting.

The Stormglass catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

Stormglass’ developer surface includes authentication, developer portal, documentation, signup flow, pricing, engineering blog, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

58.2/100 strong ▬ flat Agent 31/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6

AccessFreemiumSelf serve⚡ Free to try

7 APIs

AstronomyBioClimateElevationForecastingMarineOceanSolarTidesWeatherWind

Kin Score

Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6

Composite quality — 58.2/100 · strong

Contract Quality 17.8 / 25

Developer Ergonomics 7.0 / 20

Commercial Clarity 14.2 / 20

Operational Transparency 4.8 / 13

Governance 7.0 / 12

Discoverability 7.4 / 10

Agent readiness — 31/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/stormglass: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 7

Individual APIs this provider publishes, each with its own machine-readable definition.

Rate Limits 1

Documented rate limits and quota policies.

Stormglass Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

JSON Schema 2

Standalone JSON Schema definitions for this provider's data models.

Examples 3

Example request and response payloads for these APIs.

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Portal

Portal

Signup

Signup

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 2

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace

PostmanWorkspace

GitHubOrg

GitHubOrg

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Source (apis.yml)

aid: stormglass
name: Stormglass
description: 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.
type: Index
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
position: Consumer
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/stormglass.png
tags:
- Astronomy
- Bio
- Climate
- Elevation
- Forecasting
- Marine
- Ocean
- Solar
- Tides
- Weather
- Wind
created: '2025-05-02'
modified: '2026-05-19'
url: https://raw.githubusercontent.com/api-evangelist/stormglass/refs/heads/main/apis.yml
specificationVersion: '0.19'
apis:
- aid: stormglass:stormglass-astronomy-api
  name: Stormglass Astronomy API
  description: Solar and lunar astronomical data including sunrise, sunset, moon phases
  humanURL: https://stormglass.io/
  baseURL: https://api.stormglass.io/v2
  tags:
  - Astronomy
  properties:
  - type: OpenAPI
    url: openapi/stormglass-astronomy-api-openapi.yml
  - type: Documentation
    url: https://docs.stormglass.io/
  - type: Pricing
    url: https://stormglass.io/pricing
  - type: Signup
    url: https://stormglass.io/register
  - type: Website
    url: https://stormglass.io/
  - type: Blog
    url: https://stormglass.io/blog
  - type: TermsOfService
    url: https://stormglass.io/terms-and-conditions/
  - type: PrivacyPolicy
    url: https://stormglass.io/privacy-policy/
- aid: stormglass:stormglass-bio-api
  name: Stormglass Bio API
  description: Biological and oceanographic data including chlorophyll and nutrients
  humanURL: https://stormglass.io/
  baseURL: https://api.stormglass.io/v2
  tags:
  - Bio
  properties:
  - type: OpenAPI
    url: openapi/stormglass-bio-api-openapi.yml
  - type: Documentation
    url: https://docs.stormglass.io/
  - type: Pricing
    url: https://stormglass.io/pricing
  - type: Signup
    url: https://stormglass.io/register
  - type: Website
    url: https://stormglass.io/
  - type: Blog
    url: https://stormglass.io/blog
  - type: TermsOfService
    url: https://stormglass.io/terms-and-conditions/
  - type: PrivacyPolicy
    url: https://stormglass.io/privacy-policy/
- aid: stormglass:stormglass-elevation-api
  name: Stormglass Elevation API
  description: Global elevation and bathymetry data
  humanURL: https://stormglass.io/
  baseURL: https://api.stormglass.io/v2
  tags:
  - Elevation
  properties:
  - type: OpenAPI
    url: openapi/stormglass-elevation-api-openapi.yml
  - type: Documentation
    url: https://docs.stormglass.io/
  - type: Pricing
    url: https://stormglass.io/pricing
  - type: Signup
    url: https://stormglass.io/register
  - type: Website
    url: https://stormglass.io/
  - type: Blog
    url: https://stormglass.io/blog
  - type: TermsOfService
    url: https://stormglass.io/terms-and-conditions/
  - type: PrivacyPolicy
    url: https://stormglass.io/privacy-policy/
- aid: stormglass:stormglass-marine-api
  name: Stormglass Marine API
  description: Marine environment data including waves, currents, and water temperature
  humanURL: https://stormglass.io/
  baseURL: https://api.stormglass.io/v2
  tags:
  - Marine
  properties:
  - type: OpenAPI
    url: openapi/stormglass-marine-api-openapi.yml
  - type: Documentation
    url: https://docs.stormglass.io/
  - type: Pricing
    url: https://stormglass.io/pricing
  - type: Signup
    url: https://stormglass.io/register
  - type: Website
    url: https://stormglass.io/
  - type: Blog
    url: https://stormglass.io/blog
  - type: TermsOfService
    url: https://stormglass.io/terms-and-conditions/
  - type: PrivacyPolicy
    url: https://stormglass.io/privacy-policy/
- aid: stormglass:stormglass-solar-api
  name: Stormglass Solar API
  description: Solar radiation and UV index data
  humanURL: https://stormglass.io/
  baseURL: https://api.stormglass.io/v2
  tags:
  - Solar
  properties:
  - type: OpenAPI
    url: openapi/stormglass-solar-api-openapi.yml
  - type: Documentation
    url: https://docs.stormglass.io/
  - type: Pricing
    url: https://stormglass.io/pricing
  - type: Signup
    url: https://stormglass.io/register
  - type: Website
    url: https://stormglass.io/
  - type: Blog
    url: https://stormglass.io/blog
  - type: TermsOfService
    url: https://stormglass.io/terms-and-conditions/
  - type: PrivacyPolicy
    url: https://stormglass.io/privacy-policy/
- aid: stormglass:stormglass-tides-api
  name: Stormglass Tides API
  description: Tidal data including extremes, sea level, and tide station listings
  humanURL: https://stormglass.io/
  baseURL: https://api.stormglass.io/v2
  tags:
  - Tides
  properties:
  - type: OpenAPI
    url: openapi/stormglass-tides-api-openapi.yml
  - type: Documentation
    url: https://docs.stormglass.io/
  - type: Pricing
    url: https://stormglass.io/pricing
  - type: Signup
    url: https://stormglass.io/register
  - type: Website
    url: https://stormglass.io/
  - type: Blog
    url: https://stormglass.io/blog
  - type: TermsOfService
    url: https://stormglass.io/terms-and-conditions/
  - type: PrivacyPolicy
    url: https://stormglass.io/privacy-policy/
- aid: stormglass:stormglass-weather-api
  name: Stormglass Weather API
  description: Point weather forecasts and historical weather data
  humanURL: https://stormglass.io/
  baseURL: https://api.stormglass.io/v2
  tags:
  - Weather
  properties:
  - type: OpenAPI
    url: openapi/stormglass-weather-api-openapi.yml
  - type: Documentation
    url: https://docs.stormglass.io/
  - type: Pricing
    url: https://stormglass.io/pricing
  - type: Signup
    url: https://stormglass.io/register
  - type: Website
    url: https://stormglass.io/
  - type: Blog
    url: https://stormglass.io/blog
  - type: TermsOfService
    url: https://stormglass.io/terms-and-conditions/
  - type: PrivacyPolicy
    url: https://stormglass.io/privacy-policy/
common:
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/stormglass/overview
- type: AgenticAccess
  url: agentic-access/stormglass-agentic-access.yml
- type: DomainSecurity
  url: security/stormglass-domain-security.yml
- type: Authentication
  url: authentication/stormglass-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/stormglassio
- type: Portal
  url: https://stormglass.io/
- type: Documentation
  url: https://docs.stormglass.io/
- type: Signup
  url: https://stormglass.io/register
- type: Pricing
  url: https://stormglass.io/pricing
- type: Website
  url: https://stormglass.io/
- type: Blog
  url: https://stormglass.io/blog
- type: TermsOfService
  url: https://stormglass.io/terms-and-conditions/
- type: PrivacyPolicy
  url: https://stormglass.io/privacy-policy/
- type: GitHubOrg
  url: https://github.com/stormglass
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Stormglass

APIs 7

Postman Collections 7

Open Collections 1

Pricing Plans 1