Add tutorial: How to Build a Multi-Chain Portfolio Tracker with Zerion API

Author: vshamanov

content/tutorials/how-to-build-a-multi-chain-portfolio-tracker-with-zerion-api.md

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+---
+title: "How to Build a Multi-Chain Portfolio Tracker with Zerion API"
+description: "Build a multi-chain crypto portfolio tracker that fetches wallet valuations, token holdings across chains, multi-wallet aggregation, and historical balance charts using the Zerion API."
+authors: ["@zerion"]
+tags: ["DeFi", "Dapp"]
+languages: ["JavaScript", "Python"]
+url: "https://developers.zerion.io/recipes/multi-chain-portfolio"
+dateAdded: 2026-04-28
+level: "Intermediate"
+---