featured imageMarika
April 27, 2026

Best Ethereum APIs (Quick Overview for Developers)

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Ethereum has changed.

It’s no longer just one chain. Users are spread across Ethereum, Arbitrum, Base, Polygon, and more. Wallets now hold tokens, DeFi positions, and activity across multiple networks.

For developers, that creates friction.

You’re no longer pulling data from one place. You’re stitching together multiple APIs, formats, and data sources just to get a complete view.

That’s why a new generation of Ethereum APIs is emerging… focused less on raw node access and more on clean, usable data.

If you're building in this space, these are some of the key players:

  • CoinStats API – simple multi-chain wallet data in one call
  • NOWNodes – easy access to blockchain infrastructure without running nodes
  • Ethplorer – lightweight Ethereum token and wallet tracking
  • Unmarshal – decoded, human-readable blockchain data
  • Blocknative – real-time mempool and transaction tracking
  • Tatum – all-in-one platform for building blockchain apps
  • Covalent API – structured, indexed data across multiple chains

Each of these tools solves a different piece of the puzzle — from raw access to fully aggregated wallet insights.

APIMain StrengthBest Use Case
CoinStats APIMulti-chain wallet aggregationPortfolio trackers, DeFi dashboards
NOWNodesNode infrastructure accessQuick integrations
EthplorerSimple token dataLightweight apps
UnmarshalDecoded blockchain dataReadable transaction insights
BlocknativeReal-time mempool dataUX, gas tracking
TatumFull development platformFast product builds
Covalent APIStructured multi-chain dataAnalytics, dashboards
CoinAPIMarket data layerTrading, pricing, analytics

On-chain data tells you what happened inside wallets.

It doesn’t tell you what’s happening in the market.

That’s where CoinAPI fits in.

While the APIs above focus on blockchain data, CoinAPI provides:

  • real-time and historical market data
  • trades, order books, OHLCV
  • normalized data across hundreds of exchanges

In practice, developers often combine both layers: on-chain data + market data = full picture.

This is just the surface.

👉 The full Ethereum API guide on CoinAPI goes deeper into each API, with detailed features, use cases, and how they fit together in real-world products.

If you're building in crypto today, it's not about choosing one API.

It's about combining the right ones.

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