https://data.nasa.gov/stories/s/gk8h-th3y

https://quickchart.io/

https://developer.ap.org/

https://developer.nytimes.com/

https://fdc.nal.usda.gov/api-guide.html

https://www.ncei.noaa.gov/support/access-data-service-api-user-documentation

https://www.ncei.noaa.gov/access/services/search/v1/data?dataset=daily-summaries&startDate=2010-01-01T00:00:00&endDate=2016-12-31T23:09:59&bBox=40.6,-79.4,40.7,-79.3&dataTypes=PRCP&stations=USW00003812&limit=10&offset=0

https://www.ncei.noaa.gov/access/homr/reports/mshr

https://www.ncdc.noaa.gov/cdo-web/webservices/v2#stations

https://medium.com/the-era-of-apis/20-tutorials-on-how-to-create-your-own-api-sorted-by-programming-language-9ad2fa5fc429

https://learn.vonage.com/blog/2021/03/15/the-ultimate-list-of-fun-apis-for-your-next-coding-project/

JSON Examples

List of countries, territories and currencies: https://restcountries.com/v2/all

JSONPlaceholder: https://jsonplaceholder.typicode.com/posts

List of cities around the world: https://public.opendatasoft.com/api/records/1.0/search/?dataset=worldcitiespop&rows=10

List of programming languages: https://raw.githubusercontent.com/github/linguist/master/lib/linguist/languages.yml

There are many publicly available JSON files, covering a wide range of topics. Here are a few examples:

1. GitHub API: https://api.github.com/users/octocat/repos

2. OpenWeatherMap API: https://samples.openweathermap.org/data/2.5/weather?q=London,uk&appid={API key}

3. Reddit API: https://www.reddit.com/r/funny/top.json

4. COVID-19 Data: https://data.cdc.gov/resource/9mfq-cb36.json

5. Twitter API: https://api.twitter.com/1.1/search/tweets.json?q=from%3Atwitterdev&result_type=popular

6. SpaceX API: https://api.spacexdata.com/v4/launches

7. Yelp API: https://api.yelp.com/v3/businesses/search?term=restaurants&location=San+Francisco

8. New York Times API: https://api.nytimes.com/svc/topstories/v2/world.json?api-key={API key}

9. Open Library Books API: https://openlibrary.org/api/books?bibkeys=ISBN:9780980200447&format=json&jscmd=data

10. Flickr API: https://www.flickr.com/services/rest/?method=flickr.photos.search&api_key={API key}&text=landscape&format=json&nojsoncallback=1

11. World Bank API: https://api.worldbank.org/v2/country/all/indicator/SP.POP.TOTL?format=json

12. US Census Bureau API: https://api.census.gov/data/2019/pep/population?get=POP&for=state:*&key={API key}

13. National Park Service API: https://developer.nps.gov/api/v1/parks?limit=10&q=yosemite&api_key={API key}

14. Marvel Comics API: https://gateway.marvel.com/v1/public/characters?nameStartsWith=Spider&apikey={API key}

15. COVID-19 Vaccinations API: https://covid.cdc.gov/covid-data-tracker/COVIDData/getAjaxData?id=vaccinations_state_cumulative&_=1620710832765

16. NBA Stats API: https://data.nba.net/10s/prod/v1/2021/players.json

17. SpaceX Launches API: https://api.spacexdata.com/v4/launches/past

18. PokéAPI: https://pokeapi.co/api/v2/pokemon/ditto

19. OMDB API (Open Movie Database): http://www.omdbapi.com/?apikey={API key}&t=The+Matrix

20. Google Books API: https://www.googleapis.com/books/v1/volumes?q=isbn:0451526538

 Example Queries

https://api.openweathermap.org/data/2.5/weather?q=Kittanning&appid=eb6ddf5a1d4f6738f7f0a6c7f204ba2d&units=imperial

https://api.eia.gov/v2/electricity/retail-sales/data?api_key=uK61P8Gd2o6G8syNUyg4W1uadzkQaxXQO3t6FHSO&data[]=price&facets[sectorid][]=RES&facets[stateid][]=PA&frequency=monthly