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curl Debugging Recipes: Status, Timing, Headers, Redirects, --resolve and Proxies

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Self-Hosting & Infra beginner 6 min read $0.01 Updated 2026-10-20

Practical curl debugging: -v and -i, -w timing variables, redirects with -L, HEAD requests, --resolve and --connect-to, TLS details, JSON bodies, authentication headers, retries, compression, and exit codes.

Use curl to find out why a request is slow or failing: print status and timings, follow redirects, inspect headers and TLS, test a specific server with --resolve, send JSON, and see what a proxy changes.

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#curl#http#debugging#networking#api

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