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Reference
Standards, constants, and address directories worth bookmarking: Multicall3 deployments, Chainlink feed addresses, proxy storage slots. Written once, checked often.
ERC-20, ERC-721, and ERC-1155 ABI JSON (Copy-Paste Reference)
The ERC-20 ABI in JSON, plus ERC-721, ERC-1155, and WETH9, each with the human-readable viem form, function selectors, and what's optional versus required.
What Is a Smart Contract ABI? JSON Format, Examples, and Where It Comes From
A smart contract ABI is the JSON interface describing a contract's functions and events, generated by the compiler and used to encode calls and decode results.
ERC-1155 URI and Metadata: The {id} Substitution, the JSON Schema, and Total Supply Explained
How ERC-1155's uri() function, the {id} hex substitution rule, the metadata JSON schema, and totalSupply(uint256) actually work, with a worked example and the correct ABI source.
Querying Polygon Contracts with evmquery: Chain ID, Proxy Resolution, and a Live Example
evmquery now reads Polygon (evm_polygon, chain ID 137) contracts through REST, MCP, and n8n — same ABI resolution and proxy unwinding as Ethereum, Base, and BNB Chain.
Multicall3 in 2026: The Practical Guide to Batching EVM Contract Reads
Multicall3 lets you collapse hundreds of RPC roundtrips into a single call. This guide covers how it works, Viem / Ethers / Wagmi usage, common pitfalls, and when to hand it off.