Sources.

Open-Meteo

https://api.open-meteo.com/v1/forecast

Open-source weather forecast API — no key required. Provides current conditions for configured locations worldwide.

CC BY 4.0

NASA Astronomy Picture of the DayAPI key

https://api.nasa.gov/planetary/apod

Daily space photograph or illustration with expert explanation, curated by NASA since 1995.

NASA Open Data

arXiv

https://export.arxiv.org/api/query

Open-access preprint server. Aster reads categories cs.AI, q-bio.NC, and astro-ph.CO.

CC BY 4.0 / author-retained

Metropolitan Museum of Art

https://collectionapi.metmuseum.org/public/collection/v1

Open-access collection of 400,000+ public-domain artworks with freely accessible images.

CC0 1.0

Wikipedia — Featured Article

https://en.wikipedia.org/api/rest_v1/feed/featured/

Daily featured article from the English Wikipedia, selected by editors.

CC BY-SA 4.0

Wikipedia — Random Article

https://en.wikipedia.org/api/rest_v1/page/random/summary

A random article summary from the English Wikipedia — curated serendipity.

CC BY-SA 4.0

Philosophers API

https://philosophersapi.com/api/philosophers

Philosopher profiles drawn from the Stanford Encyclopedia and Internet Encyclopedia of Philosophy.

Stanford Encyclopedia of Philosophy

PoetryDB

https://poetrydb.org/random

A public-domain poetry database. Aster draws a random poem each cycle.

Public domain

BBC News — World

https://feeds.bbci.co.uk/news/world/rss.xml

Global news from the BBC World Service.

NASA Breaking News

https://www.nasa.gov/rss/dyn/breaking_news.rss

Latest announcements and discoveries from NASA.

World Health Organization

https://www.who.int/rss-feeds/news-english.xml

Public health alerts, outbreaks, and global health news from the WHO.

United Nations

https://www.un.org/en/rss.xml

News and statements from the United Nations.

NPR — World

https://feeds.npr.org/1004/rss.xml

International news, world affairs, and global trends from NPR.

ScienceDaily

https://www.sciencedaily.com/rss/all.xml

Breaking science news across biology, health, environment, and technology.

MarketWatch — Top Stories

https://feeds.content.dowjones.io/public/rss/mw_topstories

Financial markets and economic news from MarketWatch.