Tukuk-OSWhy "No Key" Matters
Half of small-project death is credential friction: you want one number — a country's population, today's earthquake list — and a form asks for a credit card. Most of the sources below already power real pages on tukuk.org, and the rest we have used in prototypes; every one was chosen because it answers anonymously and politely. The fine print is included because becoming a data adult means reading it.
1. REST Countries — the Country Reference
restcountries.com returns clean JSON for all ~250 countries and territories: official names in a dozen languages, capitals, populations, areas, continents, currencies, languages, timezones, and flag image URLs. No key, no signup.
``
GET https://restcountries.com/v3.1/all?fields=name,capital,population,region,flags
Honest fine print: it is a community project hosted generously; it can be slow at peak times and the terms ask for caching. Our country pages fetch it once, cache the merged result, and serve that cache — you should too.
2. World Bank Open Data — Numbers With History
api.worldbank.org exposes thousands of indicators — population, GDP, life expectancy, energy, school enrolment — as JSON or XML, year by year back to 1960 for many series, with no key for normal volumes.
`
GET https://api.worldbank.org/v2/country/MYS/indicator/SP.POP.TOTL?format=json&mrnev=5
Honest fine print: the response format is two-element arrays (metadata, then data) that trip up first-timers, and revision policies mean old-year figures can shift as statistical methods update. Cite the year you downloaded.
3. USGS Earthquake Feeds — the Planet, Live
The US Geological Survey publishes machine-readable earthquake feeds for the past hour, day and week, worldwide and by magnitude floor — pure GeoJSON, no key:
`
GET https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/all_day.geojson
Honest fine print: smaller events are added and magnitude estimates get revised as more seismic stations report; an early "M5.9" can become "M6.2" later. For quakes this is a feed of provisional truth — say so in your app.
4. NASA Open APIs — APOD, EPIC and Friends
api.nasa.gov covers the Astronomy Picture of the Day, satellite photos of the whole Earth disk (EPIC), near-Earth object lists (NeoWs) and more. Registration for a key is instant and free — but many endpoints answer happily with the public DEMO_KEY, so you can prototype before you even sign up.
`
GET https://api.nasa.gov/planetary/apod?api_key=DEMO_KEY
Honest fine print: DEMO_KEY is rate-shared across all demo users; when a project leaves the prototype pile, register your own key — it costs nothing.
5. Open-Meteo — Forecasts Without a Contract
open-meteo.com returns weather forecasts, historical reanalysis and air quality for any lat/lon, free for non-commercial use with no key at all. It is the rare weather API that does not need a signup wall, and it exposes hourly model data from several national forecast models.
`
GET https://api.open-meteo.com/v1/forecast?latitude=51.5&longitude=-0.1¤t=temperature_2m
Honest fine print: the free tier has a generous hourly call budget and clearly published commercial terms; check them before building anything that earns money.
6. Wikimedia Commons — Flags and Public-Domain Media
The category of country flag images on Wikimedia Commons gives stable URLs for every national flag in SVG and PNG — the very source our country tables pull from. Keyless, public-domain or freely licensed, and enormous.
Honest fine print: read the license on each file — public domain for most flags by their nature (government works), but map derivatives can carry attribution obligations.
The Rule Behind All Six: Cache Like You Mean It
Every keyless service above is a gift, paid for by someone. The professional move — and the one that makes your app fast — is: fetch once on cold start, keep a server-side cache with a sensible TTL (hours for country facts, minutes for live quakes), serve the cache when the upstream is slow or down, and label stale data as stale. That pattern — live fetch, timed cache, honest fallback — is exactly how our own country directory and the geography quiz built from real capitals stay up when half the internet hiccups.
What to Build This Weekend
- A "country battles" card game comparing two random nations by population, area and life expectancy (sources 1 + 2).
- An earthquake ticker with a magnitude filter and a map pin trail (source 3).
- An EPIC "Earth today" wallpaper bot: the satellite view of the day, cropped to your hemisphere (source 4).
- A "will I get rained on" page that asks Open-Meteo once per hour and says yes or no in one word (source 5).
All four fit in a weekend, all four teach the same lesson twice: the hard part of data apps is not the fetching, it is the honesty about what the numbers mean and when they were last true.