Blog
Onchain reads, decoded.
Guides, comparisons, integrations, reference docs, and trust reports for reading smart contract data from Claude, your code, n8n, or a REST client.
Live On-Chain Data in LangGraph: Build an EVM Blockchain Tool in 40 Lines
Wire evmquery into a LangGraph ReAct agent to query live EVM contract data — token supplies, oracle prices, DeFi positions — with full state persistence across tool calls. No ABIs, no RPC node.
Live Onchain Data in Pydantic AI: Build an EVM Blockchain Tool in 30 Lines
Define a typed Pydantic AI tool that reads live EVM contract data — USDC balances, ETH prices, Aave positions — without ABIs, RPC nodes, or web3.py boilerplate.
Live Onchain Data in CrewAI: Build a Custom EVM Blockchain Tool
Wire a custom evmquery tool into CrewAI and give your AI crew live access to EVM contract state — USDC balances, ETH prices, and Aave health factors — without ABIs or RPC nodes.
Multi-Wallet ERC-20 Balance Scanning from TypeScript: No ABIs, No RPC, No Viem
Scan ERC-20 token balances for many wallets, across Ethereum, Base, BNB Chain, and Polygon, using TypeScript fetch. No Viem, no ABI files, no RPC provider needed.
Blockchain Monitoring in Python: Poll EVM Contract State Without the Boilerplate
How to write a Python script that polls EVM contract state (Aave health factors, ERC-20 balances, multi-wallet checks) using evmquery's REST API. No ABIs, no ABI decoders, no Multicall3 setup.
Live Onchain Data in LangChain: Build a Custom EVM Blockchain Tool in 30 Lines
Define a custom LangChain tool that queries live EVM smart contract data — USDC balances, ETH prices, Aave positions — without ABIs, RPC nodes, or web3.py boilerplate.
Live Onchain Data in the OpenAI Agents SDK: Add an EVM Blockchain Tool
Wire the OpenAI Agents SDK to live EVM smart contract data with one @function_tool. Reads USDC balances, Chainlink prices, and Aave positions on Ethereum, Base, or BNB. No ABIs needed.
Live Onchain Data in the Vercel AI SDK: Add an EVM Blockchain Tool
Define a custom evmquery tool in the Vercel AI SDK and give your AI app live access to USDC balances, Aave positions, and any EVM contract read on Ethereum, Base, or BNB.
Blockchain Indexers in 2026: The Graph, Goldsky, and When to Skip the Index Entirely
When The Graph wins and when a direct contract query is faster. A practical guide to blockchain indexers with TypeScript examples for ERC-20, Uniswap v3, and DeFi.