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Base API Documentation

Building a trading app or DEX UI on Base?

For real-time trades and prices on Base (and the last ~30 days), use the curated Trading cube — Trading.Trades gives you clean, MEV-filtered swaps with USD price, market cap, and supply on every row across 8 chains in one API. For historical Base data older than ~30 days, use the chain-level DEXTrades / DEXTradeByTokens APIs documented below.

Overview​

In this section we will see how to fetch data on tokens, transactions, DEXs like Aerodrome and Uniswap, liquidity pools, and slippage data on Base via APIs and Streams.

If you need help getting data on Base, reach out to support.

What is Base API?​

Bitquery Base APIs help you fetch onchain data like trades, transactions, balances, token holders, liquidity pools, and slippage data etc using graphQL query.

What are capabilities of Bitquery Base API?​

Bitquery Base APIs are very flexible; you can fetch trade, transaction, balance, liquidity, and slippage information for a period, for a specific wallet, and join with other information.

Difference between Base RPC and Bitquery Base API?​

Base RPCBitquery Base API
JSON-RPC endpoint exposing raw EVM on-chain state and transactionsGraphQL endpoint over pre-indexed, parsed Base chain data (token transfers, DEX trades, logs, calls, etc.)
No built-in history or analytics—any indexing/aggregation you build or outsourceHistorical data, joins, aggregations & real-time subscriptions
Ideal for submitting transactionsGreat for real-time data and historical backtesting without running your own indexer

Does Bitquery support Base Websocket and Webhooks?​

Bitquery supports websocket and webhooks; you can convert most GraphQL APIs into GraphQL streams by changing the word query to subscription. You can monitor this data via a websocket. More docs and code samples are available here.

Quick start​

Run this minimal GraphQL query to fetch the latest 5 DEX trades on Base:

query LatestBaseTrades {
  EVM(network: base) {
    DEXTrades(limit: { count: 5 }, orderBy: { descending: Block_Time }) {
      Block { Time }
      Trade {
        Dex { ProtocolName }
        Buy { AmountInUSD Currency { Symbol } }
        Sell { AmountInUSD Currency { Symbol } }
      }
      Transaction { Hash }
    }
  }
}

DEX and Protocol APIs​

Base Slippage API​

Get slippage and price impact data for Base DEX pools. Understand price impact and liquidity depth for token swaps, calculate maximum input amounts at different slippage tolerances, and monitor real-time slippage data across all DEX pools on Base.

Base Liquidity API​

Monitor real-time liquidity changes, track pool reserves, and analyze liquidity depth for token pairs on Base DEX pools. Track when liquidity is added or removed, monitor pool health and depth, and analyze liquidity patterns across different pools.

Tokens, Transfers, Balances​

NFTs​

AI Agent​

Videos​

Video Tutorial | Aerodrome: Latest Trades & Most Purchased Tokens​

Video Tutorial | Aerodrome: Latest Liquidity Pools & Pool Liquidity​

Video Tutorial | Base DEX Trades API​

Video Tutorial | Base Transfers in Realtime​

Video Tutorial | Latest Memecoins on Base​

Browse live Base memecoin DEX prices on DEXrabbit's Base Meme Coins category.

Video Tutorial | Base Balance Updates​

Video Tutorial | Build AI Trading Agent on Base​