Check balances, send transfers, and approve USDC spending on EVM chains and Solana.
npx skills add https://github.com/Lightupwrld/Cycuxio --skill use-usdc-lightupwrld
Please help me install this Agent Skill. Skill: use-usdc Source: https://github.com/Lightupwrld/Cycuxio/tree/main/.agents/skills/use-usdc Command: npx skills add https://github.com/Lightupwrld/Cycuxio --skill use-usdc-lightupwrld
balanceOf on EVM or by deriving the Associated Token Account on Solana, with no private key required. - Transfers and Approvals: Send USDC with pre-flight balance and gas checks, transaction previews, and explicit user confirmation; approve contracts to spend USDC on EVM. - Transfer Verification: Query Transfer events on EVM or recent signatures on Solana to confirm incoming payments. - Use Case: An agent needs to pay 10 USDC to a recipient on Arc Testnet. The Skill checks the sender's balance and gas, presents a preview with the correct USDC contract address, and submits the transfer only after confirmation. ## Quick Start Check my USDC balance on Base Sepolia for address 0xYourAddress using the use-usdc skill.High-intent search queries and answers about installing and using this skill.
Call the ERC-20 balanceOf method on the chain's USDC contract using viem's readContract, then format the result with 6 decimals via formatUnits. No private key is needed for read operations.
Derive the sender and recipient Associated Token Accounts with findAssociatedTokenPda, build a transfer instruction with getTransferInstruction, and submit via sendAndConfirmTransactionFactory. The recipient ATA must exist before the transfer or the transaction fails.
Each chain has a distinct native USDC address, such as 0xA0b8...eB48 on Ethereum mainnet and 0x8335...2913 on Base. The canonical list is maintained at developers.circle.com/stablecoins/usdc-contract-addresses; never use bridged variants like USDbC.
USDC uses 6 decimals on all chains, not 18. Use parseUnits(amount, 6) on EVM or Math.floor(amount * 1_000_000) on Solana; using 18 decimals produces amounts a trillion times too large.
No, Solana SPL tokens have no approve method. Protocols on Solana use Program Derived Addresses instead, so you transfer directly or delegate through program instructions rather than granting allowances.
Direct transfers only work within a single chain. To move USDC between chains, use a bridging approach such as Circle's CCTP, which burns USDC on the source chain and mints it on the destination chain.
FuzzysToddConfigure and deploy EVM applications on Arc testnet using USDC as native gas.
Pieverse-EngPay and receive USDC for HTTP resources on Morph L2 via x402.
alsk1992Execute cross-chain token transfers via Wormhole and Circle CCTP protocols.
konopkjaCoordinate multi-chain UX for Ethereum apps with unified balances and automatic network switching.