Build crypto wallets using Circle Modular Wallets SDK with passkey authentication, gasless transactions, and extensible module architecture. Use when: creating crypto wallets with passkey-based (WebAuthn) registration and login, sending gasless transactions using Circle Gas Station paymaster, batching multiple transactions into a single user operation, implementing passkey recovery using BIP-39…
Install
npx skills add circlefin/skills --skill use-modular-walletsnpx skills add circlefin/skills --skill use-modular-wallets -a claude-code -gnpx skills add circlefin/skills --skill use-modular-wallets -a codex -ggemini skills install https://github.com/circlefin/skills.git --path plugins/circle/skills/use-modular-walletsgh skill install circlefin/skills use-modular-walletsgit clone --depth 1 https://github.com/circlefin/skills /tmp/circlefin__skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/circlefin__skills/plugins/circle/skills/use-modular-wallets ~/.claude/skills/use-modular-wallets # Claude Code
cp -R /tmp/circlefin__skills/plugins/circle/skills/use-modular-wallets ~/.agents/skills/use-modular-wallets # Codex, Cursor, Gemini CLI, Copilot, OpenCode