Public Data APIs

Open datasets and APIs that are useful for research, prototypes, charts, and source-grounded answers.

Start here when a claim needs a dataset, an API, or a reusable identifier instead of a loose search result.

Best for

  • Researchers and builders who need source-grounded answers.
  • Prototype makers turning public datasets into maps, charts, or checks.

How to use this lane

  • Start with identifiers and coverage before asking an AI model to summarize.
  • Keep the original API or dataset URL near any generated answer.

Selection criteria

  • The source has queryable data, documentation, and stable identifiers.
  • The dataset can support a concrete chart, lookup, or research question.

Common pitfalls

  • Treating a dataset as complete without checking coverage and freshness.
  • Losing attribution when copying results into notes or AI prompts.

Why these gems

OpenAlexStrong for scholarly metadata and source-aware research workflows.Wikidata Query ServiceUseful when a question needs linked entities and reusable identifiers.Open-MeteoA practical weather API that works well for prototypes and charts.OpenStreetMapStrong when public data needs local geographic context, map features, or attribution.Datasette LiteUseful for quickly inspecting a CSV or SQLite file before turning it into a public note.

Related rabbit holes

Compare Public Data Sources Before Asking AILeave with one dataset URL, one queryable identifier, and a clearer prompt for analysis.Verify a Place-Based Claim Before You Summarize ItLeave with one map check, one measurement source, one public statistic, and one entity link before writing the summary.

Browse by intent

Learn7Research9Design1Play2Developer9

Featured gems

All gems in this topic

Research · Play · DeveloperOpenAlexAn open catalog of scholarly works, authors, institutions, concepts, and citations.Learn · Research · DeveloperWikidata Query ServiceA SPARQL query interface for exploring Wikidata's open structured knowledge graph.Learn · Research · Play · DeveloperGBIFAn open biodiversity data network for species occurrence records, datasets, and taxonomic context.Learn · Research · DeveloperData CommonsA public knowledge graph for statistical data about places, demographics, economics, health, and climate.Learn · Research · DeveloperOpen-MeteoA weather API for forecasts, historical weather, air quality, and climate data without requiring an API key.Research · Design · DeveloperOpenStreetMapA community-built open map database for roads, trails, places, boundaries, and local geographic context.Research · Learn · DeveloperDatasette LiteA browser-only way to open CSV and SQLite data with Datasette, useful for quick inspection without a server.Research · Learn · DeveloperOpen Data CommunitiesThe UK government's linked open data platform: browse and SPARQL-query official statistics on housing, deprivation, local finance, and wellbeing, free under the Open Government Licence.Research · Learn · DeveloperOS Names APIA free Ordnance Survey gazetteer API for Great Britain: look up 2.5 million places, roads, and postcodes by name, or find the nearest named place to a point.

Learn

7 gems

Wikidata Query ServiceOpen Wikidata Query Service and start here: Open an example query before writing your own SPARQL.GBIFOpen GBIF and start here: Search a species name and inspect the occurrence map.Data CommonsOpen Data Commons and start here: Search a place or statistic and inspect the linked data page.Open-MeteoOpen Open-Meteo and start here: Use the interactive API builder for one location.Datasette LiteOpen Datasette Lite with one small local CSV and try a filter before installing anything.Open Data CommunitiesOpen Open Data Communities and browse a theme you care about — deprivation, housing, or local government spending — for the place you live.OS Names APIOpen the OS Names API documentation and try the interactive Find endpoint with a place name you know.

Research

9 gems

OpenAlexOpen OpenAlex and start here: Search a topic and inspect concepts, works, and related authors.Wikidata Query ServiceOpen Wikidata Query Service and start here: Open an example query before writing your own SPARQL.GBIFOpen GBIF and start here: Search a species name and inspect the occurrence map.Data CommonsOpen Data Commons and start here: Search a place or statistic and inspect the linked data page.Open-MeteoOpen Open-Meteo and start here: Use the interactive API builder for one location.OpenStreetMapOpen OpenStreetMap and start with the About page, then inspect one familiar place on the map.Datasette LiteOpen Datasette Lite with one small local CSV and try a filter before installing anything.Open Data CommunitiesOpen Open Data Communities and browse a theme you care about — deprivation, housing, or local government spending — for the place you live.OS Names APIOpen the OS Names API documentation and try the interactive Find endpoint with a place name you know.

Design

1 gems

OpenStreetMapOpen OpenStreetMap and start with the About page, then inspect one familiar place on the map.

Play

2 gems

OpenAlexOpen OpenAlex and start here: Search a topic and inspect concepts, works, and related authors.GBIFOpen GBIF and start here: Search a species name and inspect the occurrence map.

Developer

9 gems

OpenAlexOpen OpenAlex and start here: Search a topic and inspect concepts, works, and related authors.Wikidata Query ServiceOpen Wikidata Query Service and start here: Open an example query before writing your own SPARQL.GBIFOpen GBIF and start here: Search a species name and inspect the occurrence map.Data CommonsOpen Data Commons and start here: Search a place or statistic and inspect the linked data page.Open-MeteoOpen Open-Meteo and start here: Use the interactive API builder for one location.OpenStreetMapOpen OpenStreetMap and start with the About page, then inspect one familiar place on the map.Datasette LiteOpen Datasette Lite with one small local CSV and try a filter before installing anything.Open Data CommunitiesOpen Open Data Communities and browse a theme you care about — deprivation, housing, or local government spending — for the place you live.OS Names APIOpen the OS Names API documentation and try the interactive Find endpoint with a place name you know.