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Overview

Experience Coinbase Developer Platform’s (CDP) onchain data tools in just a few minutes. No SDK installation, no complex authentication — just instant access to live blockchain data. In this guide, you will:
  • Query live blockchain data through our SQL Playground
  • Make your first RPC call to Base through our Node Playground

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Prerequisites

That’s it! No API keys needed!

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1. Run a SQL query

Use our SQL API to query onchain data in milliseconds. With SQL API, you can:
  • Query transactions, events, blocks, and transfers across Base with < 500ms latency
  • Join data across tables for complex analytics
  • Track token flows, smart contract activity, and wallet behavior
The fastest way to query onchain data is through the SQL Playground in CDP Portal.
1

Open SQL Playground

Navigate to the SQL Playground in Portal.
2

Try a query

Copy this query to see recent USDC transfers on Base:
SELECT 
  parameters['from'] AS sender,
  parameters['to'] AS to,
  parameters['value'] AS amount,
  address AS token_address
FROM base.events
WHERE 
  event_signature = 'Transfer(address,address,uint256)'
  AND address = '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913'
LIMIT 10;
See results in milliseconds! ⚡
SQL Playground query results showing USDC transfers

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2. Make your first RPC call

CDP Node provides free RPC endpoints for Base. With Node, you can:
  • Read blockchain state (blocks, transactions, balances, smart contract data)
  • Send transactions to the network
  • Monitor events and subscribe to logs
  • Call smart contracts on Base
Let's make your first blockchain call using the Node Playground in CDP Portal.
1

Open Node Playground

Navigate to Node in Portal.
2

Run the RPC call

The playground has a prefilled eth_blockNumber call. Click Run to get the current block number on Base. See results in milliseconds! ⚡
Node Playground RPC call results showing current block number

SQL Schema

See all available tables and columns

SQL API Reference

Use the SQL API programmatically

RPC Methods

See all available RPC methods

Token Balances API

Get current ERC-20 and native token balances

Webhooks

Get real-time notifications for onchain events

Address History API

Pre-indexed wallet transactions and balance history
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