urllib3
urllib3 is a powerful, user-friendly HTTP client for Python. Much of the Python ecosystem already uses urllib3 and you should too. urllib3 brings many critical features that are missing from the Python standard libraries. Thread safety, connection pooling, client-side TLS/SSL verification. File uploads with multipart encoding. Helpers for retrying requests and dealing with HTTP redirects. Support for gzip, deflate, and brotli encoding. Proxy support for HTTP and SOCKS. 100% test coverage. urllib3 is one of the most downloaded packages on PyPI and is a dependency of many popular Python packages like Requests, Pip, and more! urllib3 is made available under the MIT License. The API Reference documentation provides API-level documentation. The User Guide is the place to go to learn how to use the library and accomplish common tasks. The more in-depth Advanced Usage guide is the place to go for lower-level tweaking.
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RequestBin
RequestBin is an HTTP request inspector and webhook testing tool for capturing, inspecting, replaying, and forwarding webhooks. It gives developers temporary request bin URLs that collect incoming HTTP requests so they can analyze what clients, APIs, and third-party services are sending without writing custom debugging code. It is built for real-time HTTP request inspection, webhook debugging, and API integration testing, making it easier to view captured data such as headers, payloads, query strings, JSON, XML, and form data in a human-readable way. RequestBin supports both local and cloud storage options, allowing users to decide how they want captured requests handled during testing and development. Its documentation covers bins, request replay, forwarding rules, mock APIs, API keys, MCP server support, and developer tools for HTTP debugging and API development.
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Jaunt
Jaunt is a Java library designed for web scraping, web automation, and JSON querying. It provides a fast, ultra-light headless browser that enables Java programs to perform tasks such as web scraping, form handling, and interfacing with REST APIs. Jaunt supports parsing of HTML, XHTML, XML, and JSON, and offers features like HTTP header and cookie manipulation, proxy support, and customizable caching. The library does not support JavaScript execution; however, for automating JavaScript-enabled browsers, Jauntium is recommended. Jaunt is available under the Apache License, with a monthly edition that expires periodically, requiring users to download the latest version upon expiration. The library is suitable for tasks such as parsing and extracting data from web pages, filling out and submitting forms, and handling HTTP requests and responses. Comprehensive tutorials and documentation are available to assist users in getting started with Jaunt.
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Fiddler
Capture all HTTP(S) traffic between your computer and the Internet with Telerik Fiddler HTTP(S) proxy. Inspect traffic, set breakpoints, and fiddle with requests & responses. Fiddler Everywhere is a web debugging proxy for macOS, Windows, and Linux. Capture, inspect, monitor all HTTP(S) traffic between your computer and the Internet, mock requests, and diagnose network issues. Fiddler Everywhere can be used for any browser, application, process. Debug traffic from macOS, Windows, or Linux systems and iOS or Android mobile devices. Ensure the proper cookies, headers, and cache directives are transferred between the client and server. Supports any framework, including .NET, Java, Ruby, etc. Mock or modify requests and responses on any website. It’s a quick and easy way to change the request and responses to test websites without changing code. Use Fiddler Everywhere to log all HTTP/S traffic between your computer and the Internet.
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