A curated list of free public APIs — searchable, community-maintained, with a free JSON API.
Repository Index
47,133 repositories indexed
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数学（小学到高中）、英语（三年级到高中）、初中物理的知识图谱：1644 个知识点、2403 条先修边、6723 道题，对齐课标，附自适应前置诊断。
CKAN is an open-source DMS (data management system) for powering data hubs and data portals. CKAN makes it easy to publish, share and use data. It powers catalog.data.gov, open.canada.ca/data, data.humdata.org among many other sites.
🌀 AI-native framework for building data portals. Scaffold a full portal from a brief and load datasets in minutes with agentic skills — any backend (CKAN, GitHub, Frictionless).
Documentation for the General Bikeshare Feed Specification, a standardized data feed for shared mobility system availability. Maintained by MobilityData
curated list of awesome tools, tutorials and APIs for Copernicus Sentinel satellite data
花叔开源的全球鸟类贴纸库 · Stickers for all 11,064 living bird species, with names in 43 languages and structured data
A compilation of 125+ free datasets for use in social science, applied microeconomics, data visualization, etc.
Open tax skills for AI: 2,250 skills across 266 jurisdictions, every figure cited to the law. Works in ChatGPT, Claude, Cursor and any MCP client.
The core OneBusAway application suite.
The World's Most Comprehensive, Authoritative, and Structured Open Source Data Source Knowledge Base
Algeria's 69 wilayas, 538 dairas and 1,541 communes with Arabic/French search and historical administrative boundaries. Python and TypeScript libraries.
A format for APIs, libraries and datasets containing and working with public transport data.
Open framework for calculating spatial urban sprawl indices and performing disaggregated population estimates using open data
Open Matrix (OMX)
:hammer: A website for the BLDS Data Specification
Public transport data in GTFS format with schemas, a data package and tests
GTFS viewer and transit analysis tool with an Electron desktop app and a free web demo / Electron masaüstü uygulaması ve ücretsiz web demosu olan bir GTFS görüntüleme ve toplu taşıma analiz aracı
Accesses parasite occurrence records from the London Natural History Museum's Host-Parasite database, which contains over a quarter of a million helminth records.
GTFS Data Pipeline for TfNSW Bus Datasets