API Client GitHub Repositories (2026) · Open Source Tools

⚡️ A fully-featured and blazing-fast PHP API client to interact with Algolia.

SDKs for CoinAPI & FinFeedAPI

Python client implementation for qBittorrent's Web API

Type-safe Jira REST API client for JavaScript and TypeScript. Supports Jira Cloud, Data Center, Agile, Service Management, Assets, Teams and organization APIs. Runtime response validation, tree-shakable ESM, Node.js and browsers.

🗜 A Ruby wrapper for the bit.ly API

Nimbus automatically analyzes your routes and validation rules to build interactive request schemas and a native interface for testing and exploring your APIs

Official Python client library for the OpenReview API

The official JS client library for the Massive.com REST and WebSocket API.

⚡️ A fully-featured and blazing-fast Go API client to interact with Algolia.

Manage mikrotik routers with .NET C# code via ADO.NET like API or enjoy O/R mapper like highlevel api.

C++23 client for Kalshi's Predictions API. Created from Kalshi's OpenAPI and AsyncAPI specs, it covers every REST operation and WebSocket channel. The WebSocket client reconnects and resubscribes. Optional transports add retries and rate limiting.

Free, open-source API testing desktop app built with Rust. No account, no cloud, no telemetry.

The DNSimple API client for Ruby.

Adyen API Library for PHP

The Swift implementation of Connect: Protobuf RPC that works.

Go client for Linode REST v4 API

The Kotlin implementation of Connect: Protobuf RPC that works.

Pixiv, in your terminal — a CLI, MCP server, and Go SDK for discovery, accounts, creators, collections, and downloads.

⚡️ A fully-featured and blazing-fast C# API client to interact with Algolia.

Adyen API Library for .NET