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Tabnine Proxy and Custom CA Certificate Setup

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Workaround available macOS, Linux, Windows Updated November 14, 2026Based on 2 user reportsHow we research

Quick answer

Tabnine CLI works behind a corporate proxy when proxy environment variables are set. Custom CA certificates are loaded with NODE_USE_SYSTEM_CA or NODE_EXTRA_CA_CERTS.

Most likely fix: Configure the proxy (Node.js 24+)

How to fix it

Try these in order — the most common fix is first.

  1. 1. Configure the proxy (Node.js 24+)

    1. export NODE_USE_ENV_PROXY=1
    2. export HTTP_PROXY=http://proxy.company.com:8080
    3. export HTTPS_PROXY=http://proxy.company.com:8080
    4. Run: tabnine
    Did this fix it?

  2. 2. Trust your company CA

    1. export NODE_USE_SYSTEM_CA=1
    2. Or: export NODE_EXTRA_CA_CERTS=/path/to/ca-bundle.crt
    3. Run: tabnine
    Did this fix it?

  3. 3. OpenCode plugin

    1. HTTP_PROXY, HTTPS_PROXY and NO_PROXY work by default; localhost is added to NO_PROXY automatically
    2. The bundled binary trusts the OS certificate store; use NODE_EXTRA_CA_CERTS for an extra PEM bundle
    3. Do not use NODE_TLS_REJECT_UNAUTHORIZED=0, it disables certificate verification
    Did this fix it?

Symptoms

Tabnine fails behind a company proxy or reports certificate errors on a network that inspects TLS.

Why it happens

  • Proxy variables not set for Node.js
  • Corporate CA not trusted by Node

This guide also covers

  • tabnine proxy
  • tabnine certificate error
  • tabnine behind firewall

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