Cambrian Now Supports Arbitrum

I'm excited to share that the Cambrian API now supports Arbitrum. Agents, protocols, and institutions can query real-time and historical financial intelligence across roughly $1.4 billion in TVL on Arbitrum, and act on signals like net-of-fee lending rates, pool-level fee APRs, and top-holder distributions.

Arbitrum is one of Ethereum's largest L2s, carrying a reputation for being one of the key networks most associated with scaling DeFi activity. It carries more value than most other Ethereum scaling networks, hosts deep deployments of the protocols that matter (e.g., Aave, Morpho, Euler, Uniswap) and its low fees plus fast blocks make it the natural home for DeFi participants that trade, rebalance, and compound far too often to live on mainnet. Plus, Arbitrum has been in the news for being the tech that the increasingly popular Robinhood Chain has been built upon.

Capital gets put to work on Arbitrum, but capital that moves as fast as it does on Arbitrum can't wait on slow, shallow, or third-party repackaged data. As of today, it doesn't have to. Financial intelligence has arrived on Arbitrum.

Arbitrum gets the same treatment as every chain we support: Cambrian's proprietary indexing stack reads state and events straight from smart contracts, instead of repackaging whatever protocols self-publish through their own APIs. Numbers that come from the source reflect what's actually happening onchain. Every EVM endpoint we offer is now live on Arbitrum, which unlocks financial intelligence like:

Arbitrum's lending markets hold the bulk of its DeFi capital, led by one of Aave V3's largest deployments on any chain. Query Aave V3, Morpho, and Euler with the granularity that allocation decisions are built on: utilization, net-of-fee rates, and curator-level vault allocations. Go much deeper than headline APY!

With the Cambrian API, pool-level TVL, swap volume, fee APR, and volatility across DEXes like Uniswap, PancakeSwap, and SushiSwap are all resolved to the individual pool and updated in real-time. When transaction fees are as low as they are on Arbitrum, bots and traders exploit pool mispricings instantly. To survive as an LP, you have to know which pools generate fees and which ones just bleed capital to impermanent loss.

Live and historical pricing, ERC-20 token listings, address-level holdings, and top-owner distributions are the raw material for treasury monitoring, risk dashboards, and market surveillance across EVM chains, now spanning Arbitrum alongside Ethereum and Base.  

Let’s get started with a simple CLI command to pull Arbitrum data. Since lending is where Arbitrum's capital concentrates, let's pull every Aave V3 market on the chain in one call:

curl "https://api.cambrian.org/evm/aave/v3/pools?chain_id=42161" \
-H "X-API-Key: $CAMBRIAN_API_KEY"

At the time of writing, here's what that result looks like:

Grab a free API key at cambrian.org/pricing and make your first Arbitrum query today. You've got options: via REST, our MCP server for web-based agents, the CLI for terminal environments, or x402 for pay-per-request access.

You genuinely don't even have to generate a key to get acquainted with the API. Just paste this command to your agent now:

Review https://docs.cambrian.org/llms.txt to understand the Cambrian API. Then give me a good overview of the data I can access and the chain coverage available in the Cambrian API.

Cambrian is continuously ingesting more financial data, onchain and offchain, to produce the best financial intelligence across every chain we index, with more chains on the way.

If you want more advice on getting started, have a feature request, or need a specific data integration, reach out to me directly on X: @0xrhota. I read everything.

Cambrian is the financial intelligence layer for agents and institutions. Our API delivers real-time and historical blockchain data, covering yield, liquidity positions, risk, trading activity, and market sentiment, for agentic and institutional DeFi applications. Founded in 2024, Cambrian is backed by Polychain Capital, Franklin Templeton, a16z crypto, Flow Traders, Selini Capital, and others.