Promise and RxJS APIs around Polkadot and Substrate based chains via RPC calls. It is dynamically generated based on what the Substrate runtime provides in terms of metadata.

Building blocks for your blockchain economy

SODA Terra Project API module : is an open source implementation of SODA API connecting storage to platforms like Kubernetes, OpenStack, and VMware

The API to search, scrape, and interact with the web at scale. 🔥

JavaScript API for Chrome and Firefox

Playwright is a framework for Web Testing and Automation. It allows testing Chromium, Firefox and WebKit with a single API.

A versatile command-line tool for interacting with Google Workspace APIs, designed for both human users and AI agents.

Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia

AI agent toolkit: unified LLM API, agent loop, TUI, coding agent CLI

A lightning-fast search engine API bringing AI-powered hybrid search to your sites and applications.

A collection of practical, installable AI agent skills for disk cleanup, AI news retrieval, and project management, following the Agent Skills standard.

A curated list of resources and tools for enhancing Claude AI workflows.