are there good APIs or SDKs or MCPs or ABCs for building custom smart contracts?

idw AI to make anything from scratch and want peace of mind from a credible third party.

For building custom smart contracts, consider using platforms like Ethereum with Solidity, or EOSIO. For APIs, Infura and Alchemy offer robust solutions. SDKs like Web3.js and Truffle are also invaluable. MCPs and ABCs might refer to middleware and abstraction layers like ChainSafe Systems or OpenZeppelin, providing more peace of mind with their established security and reliability.