List of GitHub Repositories with public API's

Public APIs

A collective list of free APIs

Link - https://github.com/public-apis/public-apis

Public API List

A collective list of free APIs for use in software and web development 🚀 (Clone of https://github.com/public-apis/public-apis)

Link - https://github.com/public-api-lists/public-api-lists

OpenAI Directory

🌐 Wikipedia for Web APIs. Directory of REST API definitions in OpenAPI 2.0/3.x format

Link - https://github.com/apis-guru/openapi-directory

API Guidelines

Microsoft REST API Guidelines

Link - https://github.com/microsoft/api-guidelines

Public APIs

📚 A public list of APIs from round the web.

Link - https://github.com/n0shake/public-apis

Public APIs

A collective list of free APIs for use in software development

Link - https://github.com/VNAPNIC/public-apis

Google APIs

Public interface definitions of Google APIs.

Link - https://github.com/googleapis/googleapis

GraphQL APIs

📜 A collective list of public GraphQL APIs

Link - https://github.com/IvanGoncharov/graphql-apis