# Sunrise Sunset

**Canonical:** https://apis.io/providers/sunrise-sunset/  
**Website:** https://sunrise-sunset.org/  
**APIs profiled:** 1

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.

## Kin Score — 36.1 / 100 (thin)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 36.1).

| Facet | Score |
|---|---|
| Discoverability | 68.5 |
| Contract Quality | 56.5 |
| Governance | 9.8 |
| Contract Governance | 9.8 |
| Operational Transparency | 15.8 |
| Developer Ergonomics | 9.5 |
| Commercial Clarity | 50.0 |
| Access Clarity | 50.0 |

## Agent readiness — 25.8 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | na |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | na |
| Error Semantics | no |
| OpenAPI Examples | verified |
| 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 |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Free · Open access — onboarding: open, pricing: free, trial: no (confidence: medium).

## APIs (1)

- **Sunrise Sunset Json API** — The Json API from Sunrise Sunset — 1 operation(s) for json.

## Agentic access (1)

- **Sunrise Sunset Agentic Access** — 1 operation

## Security (1)

- **Sunrise Sunset Domain Security** — TLSv1.3

## Plans (1)

- **Sunrise Sunset Plans Pricing**

## Tags

Sunrise, Sunset, Solar, Astronomy, Twilight, Weather, Geolocation, Free

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