HTTP outcalls performed by the backend canister (not in the frontend), including mandatory local verification of external REST API requests. Canister → internet only. For inbound webhooks / curl endpoints served by the canister, use extension-http-endpoints instead.
Install
npx skills add caffeinelabs/skills --skill extension-http-outcallsnpx skills add caffeinelabs/skills --skill extension-http-outcalls -a claude-code -gnpx skills add caffeinelabs/skills --skill extension-http-outcalls -a codex -ggemini skills install https://github.com/caffeinelabs/skills.git --path skills/extension-http-outcallsgh skill install caffeinelabs/skills extension-http-outcallsgit clone --depth 1 https://github.com/caffeinelabs/skills /tmp/caffeinelabs__skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/caffeinelabs__skills/skills/extension-http-outcalls ~/.claude/skills/extension-http-outcalls # Claude Code
cp -R /tmp/caffeinelabs__skills/skills/extension-http-outcalls ~/.agents/skills/extension-http-outcalls # Codex, Cursor, Gemini CLI, Copilot, OpenCode