curl Exit Code 35 in CI: SSL/TLS Handshake Failure

curl exit code 35 means the SSL/TLS handshake failed before any data could be exchanged.

A step exiting 35 from curl connected at the TCP level but could not negotiate a secure session.

What it means

Exit 35 is curl's CURLE_SSL_CONNECT_ERROR. The TLS handshake failed - a protocol version mismatch, an unsupported cipher, or an interrupted negotiation.

Common causes

The server requires a TLS version the client disabled (or vice versa).
A cipher/curve mismatch.
A MITM proxy interfering with the handshake.

How to fix it

Run with -v to see the handshake detail, align TLS versions/ciphers, and update the CA bundle or curl/OpenSSL version. A momentarily flaky handshake can clear on retry.

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