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Comis’s outbound HTTP traffic — OAuth refresh calls, optional content fetch, scheduled webhook calls — can be routed through an HTTPS proxy via standard environment variables (HTTPS_PROXY, HTTP_PROXY, ALL_PROXY). However, Node 22’s built-in fetch does not honor these variables by default. This page documents the behavior and the workaround Comis ships.

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The Node 22 fetch caveat

Node 22’s built-in fetch() — the global function exposed without an import — is implemented on top of the undici HTTP client. Unlike axios, node-fetch, or older HTTP libraries, Node’s built-in fetch silently ignores the HTTPS_PROXY and HTTP_PROXY environment variables. Setting them has no effect on requests made via fetch(). The unsupported_region error from auth.openai.com is the canonical signal that an operator needs a US-region proxy, but the obvious fix (export HTTPS_PROXY=http://proxy.example.com:8080) does nothing for the OAuth refresh path because the daemon uses fetch() (per pi-ai’s implementation) for token rotation.
If you are debugging an unsupported_region error and “the proxy works for curl but not Comis”, this is almost always the cause. curl, axios, and node-fetch honor HTTPS_PROXY via their own logic. Node’s built-in fetch() does not — it requires explicit proxy wiring at the undici layer.

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How Comis honors HTTPS_PROXY

When HTTPS_PROXY (or HTTP_PROXY, or ALL_PROXY) is set in the daemon’s environment, Comis configures undici’s global dispatcher to route outbound requests through that proxy at boot time. This is done once during daemon startup and applies to every subsequent fetch() call — including OAuth token refreshes, the gateway callback’s exchange step, and any fetch_url skill invocations.
~/.comis/.env
HTTPS_PROXY=http://proxy.example.com:8080
# Or for an authenticated proxy:
HTTPS_PROXY=http://user:password@proxy.example.com:8080
After setting the env var, restart the daemon for the change to take effect (the proxy wiring runs once at boot, not on hot-reload). 
pm2 restart comis
# OR
systemctl restart comis
You can verify the proxy is in effect by running comis doctor — the oauth category sub-checks include an HTTPS_PROXY-set probe. If you set the variable but Comis is not picking it up, the doctor flag tells you so.

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Troubleshooting

SymptomLikely causeFix
unsupported_region error from OAuth refreshOpenAI sees your network’s egress IP; need to route via a US-region proxySet HTTPS_PROXY=http://us-proxy.example.com:8080, restart daemon
Proxy set in shell, daemon ignores itEnv var not visible to the daemon process (e.g., set in .bashrc after pm2 spawned the process)Set the var in ~/.comis/.env (read by all Comis processes), or in the systemd unit Environment= directive, then restart
Proxy works for curl but not ComisThe other tool was using node-fetch / axios (which honor HTTPS_PROXY via their own logic); Comis uses Node’s built-in fetch and configures the proxy at bootConfirm the env var is in the daemon’s environment when it boots (check cat /proc/$(pgrep -f comis-daemon)/environ | tr '\0' '\n' | grep -i proxy)
Authenticated proxy 407 errorUsername / password not URL-escapedURL-encode special characters: @ -> %40, : -> %3A, etc.
For the unsupported_region error code’s full classification and other OAuth error codes, see OAuth concepts -> Error classification.

OAuth

Subscription-based authentication and the full OAuth error catalogue

Environment Variables

All env vars Comis reads, including proxy-related variables

Troubleshooting

Common issues across daemon, channels, and runtime

Daemon

Startup, shutdown, and the boot-time proxy wiring