Base Data: Index Contracts, Tokens, and Onchain Apps

Index Base's contract events, token transfers, and decoded transactions in one pipeline, delivered to your own database. Real-time and complete historical data, no node to run.

Base calls itself the blockchain for global finance, an Ethereum Layer 2 built by Coinbase. It launched on Optimism's OP Stack and in 2026 moved to its own Base-operated stack, with its first independent upgrade, Azul, live on mainnet in May 2026. It pairs sub-second, fractions-of-a-cent transactions with Coinbase's distribution, which is why so much consumer activity, DeFi, and onchain social now lands here. You can read how the team frames it at base.org.

That popularity is the data problem. Base is a high-throughput EVM chain where contract events, token transfers, and decoded calls pour out by the millions every day. Indexing Co covers Base in a single pipeline, decodes the raw chain into the shape you want, and delivers it to your own PostgreSQL, warehouse, or webhook. Real-time and full history, with no node to operate.

Source Base L2 blocks

Ingest blocks, logs, traces

Decode ABIs to events

Transform your JavaScript

Deliver your database

Why Base data is hard

Consumer-Scale Volume Base routinely sits among the busiest L2s, processing millions of transactions a day from the Base App, Aerodrome, Morpho, and a long tail of social and payments apps. Capturing that firehose in real time without falling behind the chain head is a standing engineering problem.

Rollup Specifics Base is a rollup that batches transactions and posts data back to Ethereum L1. Sequencer ordering, L1-to-L2 deposits, and the deposit and withdrawal lifecycle all add structure that a naive EVM scraper misses. You want history that reflects how the rollup actually settles.

Decoding Across Many Contracts A real Base dataset spans dozens of protocols at once: Aerodrome pools, Morpho Blue markets and vaults, Aave, Uniswap, Zora mints, and Basenames registrations. Each needs its own ABI and event handling, and proxies make the right ABI a moving target.

Your Own DB, Not a Hosted API Generic RPC endpoints and hosted query APIs leave you rate-limited and renting someone else's schema. Powering an app or analytics workload on Base means owning the data in your own store, shaped the way your product queries it.

What Indexing Co delivers for Base

The DIY Path

Stand up and maintain the whole stack yourself.

Run a Base archive node or wire up a third-party RPC.
Fetch and decode logs, traces, and receipts against the right ABIs.
Track proxy upgrades and per-protocol event schemas by hand.
Build backfill, reorg handling, and real-time delivery from scratch.

Indexing Co

One pipeline sources, decodes, and delivers Base to your store.

Base contract events, token transfers, and decoded txs in a single pipeline.
Decoded data, shaped by your JavaScript transform.
Lands in your PostgreSQL, BigQuery, warehouse, or webhook.
Real-time delivery plus complete backfilled history. No node, no RPC babysitting.

What you can index

EVM data type	On Base, for example
Contract events and logs	Aerodrome (merging into Aero) swaps and gauge votes, Morpho borrows
Token transfers (ERC-20, ERC-721)	USDC payments, Zora mints
Decoded transactions and traces	Base App and smart-wallet user operations
Protocol and account state	Morpho vault balances, Aave positions, Basenames

A transform, not a subgraph

You write the transform in JavaScript, not AssemblyScript, and change it without re-indexing from block zero. Indexing Co runs your function over each block server-side: decode the logs you care about and return rows for your destination.

// Indexing Co transform: reshape each block into rows for your database
function transform(block) {
  const results = [];
  const signatures = [
    'event Transfer(address indexed from, address indexed to, uint256 value)'
  ];

  for (const tx of block.transactions || []) {
    for (const log of tx.receipt?.logs || []) {
      const event = utils.evmDecodeLogWithMetadata(log, signatures);
      if (!event) continue;
      results.push({
        chain: block._network,
        block: Number(block.number),
        tx_hash: tx.hash,
        contract_address: log.address?.toLowerCase(),
        from: event.decoded.from,
        to: event.decoded.to,
        value: event.decoded.value,
      });
    }
  }
  return results;
}

Base with Indexing Co

Run it yourself if

You want full control of node infrastructure and have the team to operate a Base archive node, decode every protocol's ABIs, and build backfill and reorg handling in-house.

Use Indexing Co if

You want Base contract events, token transfers, and decoded transactions delivered to your own database, with real-time plus complete history and no infrastructure to run.

Get a Demo Open the Console

FAQ

Do I need to run a Base node?

No. Indexing Co sources Base blocks, logs, and traces for you, including full historical data, so you never operate an archive node or babysit an RPC endpoint.

Can I index any protocol on Base?

Yes. Point a pipeline at any Base contract or set of contracts, from Aerodrome and Morpho to Zora, Basenames, or your own deployments, and we decode the events against the right ABI.

Does Indexing Co handle Base reorgs and proxy upgrades?

Yes. The pipeline accounts for chain reorganizations and tracks proxy implementation changes so your decoded data stays correct as contracts upgrade.

Where does the Base data go?

Into your own destination: PostgreSQL, BigQuery, a warehouse, or a webhook. You define the output schema and own the storage.

Can I get complete historical Base data?

Yes. We backfill from your chosen start block and merge it with real-time data, so your Base dataset is gap-free from genesis forward if you want it.

Get Started

Index Base in minutes. Set up your first Base contract or token pipeline without running a node.