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cURL · libcurl & CLI
libcurl code CURLE_PROXY indicates proxy during DNS/routing/connectivity path.
Quick Answer
Error code CURLE_PROXY on your cURL libcurl & CLI means: libcurl code CURLE_PROXY indicates proxy during DNS/routing/connectivity path.. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
LIBCURL-EMBED7.797.817.847.888.08.28.48.68.8LINUX-CLIMACOS-CLI
Likely Causes
  1. CURLE_PROXY was returned while libcurl handled a request stage related to DNS/routing/connectivity path.
  2. Command options, endpoint behavior, or intermediary network components are incompatible with expected transfer flow.
  3. Runtime environment specifics (proxy, cert store, protocol support, or callback behavior) contributed to CURLE_PROXY.
How to Fix It
1
Capture verbose output (-v / --trace) and isolate the exact phase where CURLE_PROXY appears.
2
Reproduce proxy with a minimal request against a known-good endpoint.
3
Validate protocol, TLS, DNS, proxy, and timeout options tied to DNS/routing/connectivity path.
4
Adjust one option at a time until CURLE_PROXY clears and transfer completes successfully.
5
Lock the fix into scripts/clients and monitor for CURLE_PROXY regression.
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Related Error Codes
CURLE_ABORTED_BY_CALLBACKCURLE_AGAINCURLE_AUTH_ERRORCURLE_BAD_CONTENT_ENCODINGCURLE_BAD_DOWNLOAD_RESUME
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