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Onchain reads, decoded .

Guides, comparisons, and integrations for reading smart contract data from Claude, your code, n8n, or a REST client.

EVM Blockchain MCP Server — query contracts from Claude, Cursor, and ChatGPT
Integration Featured

Building with the EVM Blockchain MCP Server: Query Smart Contracts from Claude, Cursor and ChatGPT

How to give Claude, Cursor, and ChatGPT live access to EVM smart contracts using the Model Context Protocol — install, example prompts, and what MCP does (and doesn't) solve.

evmquery team 8 min read

Latest posts

Multi-wallet ERC-20 balance scanning with TypeScript REST API — no Viem, no RPC node
Guide April 26, 2026

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, and BNB Chain, using TypeScript fetch. No Viem, no ABI files, no RPC provider needed.

Blockchain monitoring in Python: EVM contract polling with evmquery
Guide April 25, 2026

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.

LangChain plus evmquery: live EVM blockchain data as a custom agent tool
Integration April 25, 2026

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.

OpenAI Agents SDK plus evmquery: live EVM blockchain data as a custom function tool
Integration April 25, 2026

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.

Vercel AI SDK plus evmquery: live EVM blockchain data as a custom tool
Integration April 25, 2026

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 guide — The Graph vs direct contract reads
Guide April 24, 2026

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.

Moralis vs Alchemy vs QuickNode vs evmquery — choosing an EVM read API
Comparison April 24, 2026

Moralis vs Alchemy vs QuickNode vs evmquery: Picking the Right API for Smart Contract Reads

A fair comparison of the four main ways to read EVM contract data in 2026. What each vendor is best at, where they stop helping, and how to pick without lock-in.

Multicall3 — batch EVM contract reads with Viem, Ethers, and Wagmi
Guide April 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.

Query EVM contract data from Python — no ABI files, no RPC nodes
Guide April 24, 2026

Query EVM Contract Data from Python: No ABIs, No RPC Nodes, No web3.py

How to read live EVM smart contract data from Python using the evmquery REST API — no ABI files, no RPC nodes, no web3.py boilerplate. Five working recipes.

Read smart contracts in n8n — EVM data in automation workflows
Integration April 24, 2026

Read Smart Contracts in n8n: Fetching EVM Data in Automation Workflows (No Code)

How to read live smart contract data from an n8n workflow. Install the evmquery community node, then ship three paste-in recipes — price alerts, DAO votes, and NFT floor monitors.