Unclear Which Claude Code feature uses this lookup is not settled.
What
A proxy is a server that network traffic is routed through, often required on company networks. One of Claude Code's proxy lookups has changed. It used to pick HTTP_PROXY or http_proxy for addresses that were not https:. It now checks the same things in the same order for every address:
HTTPS_PROXYorhttps_proxyALL_PROXYorall_proxy- git's system setting, from
git config --system --get http.proxy
HTTP_PROXY and http_proxy are no longer read here.
Why
If your proxy is set only in HTTP_PROXY, whatever relies on this lookup may no longer go through it. Setting HTTPS_PROXY or ALL_PROXY as well avoids that.
Names in the bundleHTTP_PROXYhttp_proxy
Documented inclaude-code/network-config
The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.
Added since
A small documentation edit on Securely deploying AI agents touched a line naming HTTP_PROXY after this was published.
Note that not all programs respect `HTTP_PROXY`/`HTTPS_PROXY`. Most tools (curl, pip, npm, git) do, but some may bypass these variables and connect directly. For example, Node.js `fetch()` ignores these variables by default; in Node 24+ yo…agent-sdk/secure-deployment see the edit
Confirmed since
Anthropic's documentation has since written up HTTP_PROXY, on Claude apps gateway configuration.
| `use_proxy` | No | Send the gateway's own IdP requests through the forward proxy in `HTTPS_PROXY` or `HTTP_PROXY`, honoring `NO_PROXY`. `false` keeps those requests direct. Requires v2.1.227 or later; see [IdP requests through a forward …claude-apps-gateway-config see the edit
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
Which Claude Code feature uses this lookup is not settled.
Anthropic's documentation agrees
Anthropic's documentation has since written up HTTP_PROXY, on Claude apps gateway configuration.