Sunrise Sunset

Free REST API providing sunrise, sunset, solar noon, day length, and civil, nautical, and astronomical twilight times for any geographic location and date. No API key or account required; attribution to sunrise-sunset.org is required. A single GET request to https://api.sunrise-sunset.org/json with a latitude, longitude, and optional date returns all solar time data for that location.

Sunrise Sunset publishes 1 API on the APIs.io network: Json API. Tagged areas include Sunrise, Sunset, Solar, Astronomy, and Twilight.

The Sunrise Sunset catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Sunrise Sunset’s developer surface includes documentation and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub

36.1/100 thin ▬ flat Agent 26/100 agent aware Full breakdown ↓
scored 2026-08-25 · rubric v0.14.0

AccessFreeOpen⚡ Free to try

1 APIs

SunriseSunset Solar AstronomyTwilightWeather Geolocation Free

Kin Score

Kin Score How this is scored →
scored 2026-08-25 · rubric v0.14.0

Composite quality — 36.1/100 · thin

Contract Quality 14.1 / 25

Developer Ergonomics 1.9 / 20

Access Clarity 10.0 / 20

Operational Transparency 2.1 / 13

Contract Governance 1.2 / 12

Discoverability 6.9 / 10

Agent readiness — 26/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 9 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 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 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Surface 0 / 5

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/sunrise-sunset: 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 1

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

Rate Limits 1

Documented rate limits and quota policies.

Sunrise Sunset Rate Limits

0 limits

RATE LIMITS

FinOps 1

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

JSON Schema 1

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

SolarTimesResponse

3 properties

JSON SCHEMA

Examples 2

Example request and response payloads for these APIs.

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

StatusPage

StatusPage

RateLimits

RateLimits

Contact

Contact

Commercial 4

Pricing, plans, and the legal terms of use

Plans

FinOps

TermsOfService

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: sunrise-sunset
name: Sunrise Sunset
description: 'Free REST API providing sunrise, sunset, solar noon, day length, and civil, nautical, and astronomical twilight
  times for any geographic location and date. No API key or account required; attribution to sunrise-sunset.org is required.
  A single GET request to https://api.sunrise-sunset.org/json with a latitude, longitude, and optional date returns all solar
  time data for that location.

  '
accessModel:
  pricing: free
  onboarding: open
  trial: false
  try_now: true
  public: true
  label: Free · Open access
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/sunrise-sunset.png
url: https://raw.githubusercontent.com/api-evangelist/sunrise-sunset/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.23'
type: Index
tags:
- Sunrise
- Sunset
- Solar
- Astronomy
- Twilight
- Weather
- Geolocation
- Free
apis:
- aid: sunrise-sunset:sunrise-sunset-json-api
  name: Sunrise Sunset Json API
  description: The Json API from Sunrise Sunset — 1 operation(s) for json.
  humanURL: https://sunrise-sunset.org/api
  baseURL: https://api.sunrise-sunset.org
  tags:
  - JSON
  tags_raw:
  - Json
  properties:
  - type: OpenAPI
    url: openapi/sunrise-sunset-json-api-openapi.yml
  - type: Documentation
    url: https://sunrise-sunset.org/api
common:
- type: AgenticAccess
  url: agentic-access/sunrise-sunset-agentic-access.yml
- type: DomainSecurity
  url: security/sunrise-sunset-domain-security.yml
- type: Website
  url: https://sunrise-sunset.org/
- type: Documentation
  url: https://sunrise-sunset.org/api
- type: StatusPage
  url: https://apistatus.sunrise-sunset.org/
- type: Plans
  url: https://raw.githubusercontent.com/api-evangelist/sunrise-sunset/refs/heads/main/plans/sunrise-sunset-plans-pricing.yml
- type: RateLimits
  url: https://raw.githubusercontent.com/api-evangelist/sunrise-sunset/refs/heads/main/rate-limits/sunrise-sunset-rate-limits.yml
- type: FinOps
  url: https://raw.githubusercontent.com/api-evangelist/sunrise-sunset/refs/heads/main/finops/sunrise-sunset-finops.yml
- type: TermsOfService
  url: https://sunrise-sunset.org/terms
- type: PrivacyPolicy
  url: https://sunrise-sunset.org/privacy
- type: Contact
  url: https://sunrise-sunset.org/contact
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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Sunrise Sunset

Kin Score

APIs 1

Sunrise Sunset Json API

Open Collections 2

API Collection

Sunrise Sunset Json API

Pricing Plans 1

Sunrise Sunset Plans Pricing

Rate Limits 1

Sunrise Sunset Rate Limits

FinOps 1

Sunrise Sunset Finops

Semantic Vocabularies 1

Sunrise Sunset Context

Spectral Rules 1

Sunrise Sunset API Rules