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Reference

Standards, constants, and address directories worth bookmarking: Multicall3 deployments, Chainlink feed addresses, proxy storage slots. Written once, checked often.

Querying Polygon contracts with evmquery — chain ID 137 reference
ReferenceAugust 8, 2026

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.

Chainlink price feed addresses, Ethereum, Base, and BNB Smart Chain reference
ReferenceAugust 5, 2026

Chainlink Price Feed Addresses: Ethereum, Base, and BNB Chain Reference

Chainlink price feed contract addresses for ETH/USD, BTC/USD, and USDC/USD on Ethereum, Base, and BNB Smart Chain, with decimals, heartbeat intervals, and a working REST example.

Multicall3 — batch EVM contract reads with Viem, Ethers, and Wagmi
ReferenceApril 24, 2026

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.