Build browser or server unified cross-chain USDC balances with Circle App Kit or standalone Unified Balance Kit. Supports deposit, spend, getBalances, removeFund, delegates, Forwarding Service, EVM and Solana browser wallets, private keys, and Circle Wallets adapters without direct Gateway contracts or attestation handling. Unified balance operations require no kit key.
Install
npx skills add circlefin/skills --skill unify-balancenpx skills add circlefin/skills --skill unify-balance -a claude-code -gnpx skills add circlefin/skills --skill unify-balance -a codex -ggemini skills install https://github.com/circlefin/skills.git --path plugins/circle/skills/unify-balancegh skill install circlefin/skills unify-balancegit 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/unify-balance ~/.claude/skills/unify-balance # Claude Code
cp -R /tmp/circlefin__skills/plugins/circle/skills/unify-balance ~/.agents/skills/unify-balance # Codex, Cursor, Gemini CLI, Copilot, OpenCode