Httpx

Httpx is a Python HTTP client library that provides both synchronous and asynchronous interfaces for making HTTP requests. It is designed to be a modern alternative to the requests library, with first-class support for asyncio and concurrent programming.

Built on top of httpcore, httpx handles the transport layer and offers a high-level API that includes Client and AsyncClient, with methods like get, post, put, delete, and patch. It supports HTTP/1.1 and HTTP/2, TLS verification, proxies, client-side certificates, timeouts, redirects, cookies, and streaming responses. It can reuse connections via a session-like object, improving efficiency across multiple requests.

In addition to the core client features, httpx offers extensibility through transport backends and event hooks, allowing customization of request/response processing. The API mirrors the familiar Requests interface to ease migration, while preserving asyncio compatibility for asynchronous code. It also integrates with modern Python typing and provides helpers for handling JSON payloads and form data.

Origin and licensing: httpx is an open-source project maintained by Encode and contributors. It is available on PyPI and GitHub, with ongoing development and releases that add features, bug fixes, and performance improvements.

Common use cases include building API clients, microservices, and web scrapers that require asynchronous IO or high concurrency.