Welcome to the onchain data documentation for developers! This is a suite of enterprise-grade developer tools that simplify reading and interacting with blockchain data. To learn more about our motivations and development history, please refer to our development blog series.
ServiceDescription
Wallet History APIHistorical accounting of wallet balances and transactions
Webhooks (Alpha)Real-time notifications for future onchain events
Smart Contract EventsManage your smart contract’s ABI and retrieve historical events associated with it.
Token Balance APIRetrieve current ERC-20 and native gas token balances of EVM addresses.
The onchain data tools are one part of the Coinbase Developer Platform (CDP). CDP provides even more APIs that let you query rich onchain data on the Base network. Get your Data endpoint for Base on CDP and start building.
Base is for buildersBase is a secure, low-cost, builder-friendly Ethereum L2 built to bring the next billion users onchain. See the Base docs.

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How do I get started?

  1. Log into the Coinbase Developer Platform portal— directly or from Coinbase.com.
  2. Navigate to the Data page to get your API credentials.
  3. Pick a network from the list of supported networks.
  4. Expand specific sections to get started with the SDKs, API reference, and more.

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Frequently Asked Questions

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What is the difference between the Wallet History API and the Smart Contract Events API?

The Wallet History API is a simple API that provides historical accounting of wallet balances and transactions. The Smart Contract Events API is a more complex API that allows you to manage your smart contract’s ABI and retrieve historical events associated with it.

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What is the rate limit for Data APIs?

The default rate limit for Data APIs at both IP and project level at 100 requests per second.