According to the project's description, public-apis is an open-source repository curated by community members and APILayer that provides a comprehensive and free list of public APIs. Covering various domains, the collection enables developers to quickly find and integrate required data sources. Established in 2016, the project has amassed over 494,000 GitHub stars and ranked trending on GitHub on November 1, 2026, indicating its widespread adoption and impact among developers.

APILayer Unified Suite Simplifies API Integration

APILayer’s unified suite lets developers access multiple production-grade REST APIs with a single account, dashboard, and API key. Services include geocoding addresses, email validation, fetching flight details, stock market data, and scraping search results. The platform aims for quick onboarding, providing an official Postman collection that gets developers started in under 60 seconds.

Diverse Public APIs Enable Rich Development Scenarios

The public-apis repository includes free APIs across many fields such as IP geolocation (IPstack), global stock data (Marketstack), instant weather info (Weatherstack), phone number validation (Numverify), currency exchange rates (Fixer, Exchangerate Host), real-time flight status (Aviationstack), screenshots (Screenshotlayer), and file upload/processing (Filestack). Most APIs provide JSON-formatted responses, facilitating integration across platforms and languages.

AI Agent and Tools Specific API Support

The project also lists APIs tailored for AI agents and MCP servers, including IP lookups, blockchain RPCs and indexed data, web scraping, and AI-generated images, video, voiceovers, and more. These services support multiple transport protocols like stdio and HTTP and can be installed in environments such as Cursor, Glama, and npm, demonstrating high flexibility and extensibility.

Editor's take: Aggregated resources unlock development potential for startups

By maintaining a detailed, free API list, public-apis lowers the barrier for developers and startups to access external data resources. Combined with APILayer’s unified platform, it enhances easy access to diverse data sources, aiding startups to quickly prototype or enrich product features. Entrepreneurs can select suitable APIs from the repository and use provided tools and examples to verify API stability and performance. This resource aggregation approach expands innovative application opportunities, especially for teams requiring multi-source data analysis and service combinations.