Proxyman (via Felix Krause):
Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.
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Organize your workflow by drag, drop and pin specific apps or domains. All other irrelevant ones will be completely ignored.
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Proxyman can be used as a man-in-the-middle that logs all HTTP/HTTPS traffic between your applications and SSL Web Server.
Proxyman will dynamically generate certificates on-the-fly, which enables developers to see HTTPS in plain text.
Previously: