Wallet Auth for AI Agents: Python + LangChain Tutorial

AI agents that interact with wallets need to verify what those wallets hold before making decisions. An agent approving a payment, granting access, or scoring trust needs a server-side signal, not a client-side read. This tutorial shows how to add wallet verification to a LangChain agent using the langchain-insumer package. Five minutes, working code, 32 chains. Install the package pip install langchain-insumer Requires Python 3.9+ and a free InsumerAPI key. Get one here (10 free credits, no credit card). Set up the tools import os from langchain_insumer import InsumerAPIWrapper , InsumerAttestTool , InsumerWalletTrustTool os . environ [ " INSUMER_API_KEY " ] = " insr_live_YOUR_KEY_HERE " api = InsumerAPIWrapper () attest_tool = InsumerAttestTool ( api_wrapper = api ) trust_tool = InsumerWalletTrustTool ( api_wrapper = api ) Two tools. attest_tool verifies specific conditions: token holdings, NFT ownership, EAS attestations, and Farcaster identity. trust_tool generates a full trust pro