Starting today, AI agents and developers can access 15 Arrays crypto endpoints with per-call USDC payments, giving builders a usage-based way to buy financial data without annual contracts, seat licenses, or traditional procurement overhead.
April 29, 2026
Most financial data on the internet still requires a contract, a seat license, and a procurement department to access. AI agents have none of those things. They show up at runtime, decide which data they need, pay for it, and disappear.
Today, Arrays goes live with 15 crypto data endpoints on Nanopayments by Circle Gateway, letting developers and AI agents pay per API request without subscriptions or procurement, with transactions settled onchain in batches via Circle Gateway, across 11 EVM chains.
If you're shipping AI agents that need real financial data without the enterprise contract dance, this is the launch you build for.
15 Arrays data endpoints are live on Nanopayments
Arrays is opening up its crypto data stack on a per-call basis, with no subscription, contract, or API key in the way. Twelve endpoints sit at $0.008 per call. Three endpoints sit at $0.03 per call.
The $0.008 tier covers market data: token info, spot OHLCV, futures OHLCV, funding rates, open interest, long/short ratio, taker buy/sell volume, token unlocks, supply, market cap, fear and greed index, and company crypto holdings.
The $0.03 tier covers self-computed metrics: market metrics, the crypto screener, and the time-range variant of the screener.
A full list of endpoints is in the appendix.
How Nanopayments works
Deposit USDC into a Circle Gateway non-custodial smart contract once. Sign an EIP-3009 authorization for each call. Circle Gateway batches authorizations onchain and unifies USDC liquidity across 11 EVM chains in under 500ms.
Nanopayments works with both x402 flows and standard HTTP 402 flows, so anyone already running an x402 integration plugs in without rebuilding their stack.
For the full payment flow and integration spec, see Circle's Nanopayments documentation.
What developers can build with Arrays and Nanopayments
A research agent assembles a token unlock report on demand. It calls /v1/crypto/unlock-events to pull upcoming events, then /v1/crypto/market-metrics for the relevant tokens, then /v1/crypto/screener/metrics to filter by liquidity. Total spend on the workflow: a few cents. The agent picks the next endpoint based on what its reasoning chain needs. No contract, no API key, no procurement department in the loop.
Access to financial data starts with a wallet, not a contract.
"AI agents don't buy data the way institutions do. They make decisions in real time and need infrastructure that keeps up. Nanopayments by Circle Gateway gives us a payment rail built for that behavior. Arrays gives builders a way to turn USDC into live financial data, one call at a time."
Alice Shikova, Head of Marketing, Arrays
Arrays and Nanopayments: What Comes Next
Crypto endpoints are the starting set on Nanopayments, not the full picture. The same per-call rail will carry equities, ETFs, macro, and options data over the next two quarters as Arrays extends coverage.
Subscription access stays available for institutional buyers and high-volume human users. Per-call is what we're shipping for AI agents and developers building automated workflows.
Start building
Fund a USDC balance through Circle Gateway, point your application to any Arrays crypto endpoint, pay per call.
Documentation: docs.arrays.org. Partnership or integration questions: support@arrays.org.
Start building: arrays.org.
Appendix: Supported endpoints
Tier 1 ($0.008 per call):
/v1/crypto/detail(token info)/v1/crypto/kline(spot OHLCV)/v1/crypto/futures/ohlcv(futures OHLCV)/v1/crypto/funding-rate(funding rates)/v1/crypto/open-interest(open interest)/v1/crypto/long-short-ratio(long/short ratio)/v1/crypto/taker-buy-sell-volume(taker buy/sell volume)/v1/crypto/unlock-events(token unlock events)/v1/crypto/supply(token supply)/v1/crypto/market-cap(market cap)/v1/crypto/fear-greed-index(fear and greed index)/v1/crypto/holdings(company crypto holdings)
Tier 2 ($0.03 per call):
/v1/crypto/market-metrics(self-computed market metrics)/v1/crypto/screener/metrics(crypto metrics screener, snapshot)/v1/crypto/screener/metrics/timerange(crypto metrics screener, time-range)
What is Arrays.org?
Arrays is the unified data engine for intelligent finance, providing one API across US equities, ETFs, macro, options, crypto, and on-chain data. It normalizes financial data from dozens of sources into a single consistent schema, built for AI agents and software workflows. Learn more at arrays.org.
FAQ
What is Nanopayments?
Nanopayments powered by Circle Gateway is Circle's payment rail for usage-based, machine-scale payments. It enables gas-free USDC transfers as small as $0.000001, with batched onchain settlement, across 11 EVM chains. Circle launched it on mainnet on April 29, 2026.
How do I pay for Arrays endpoints with Nanopayments?
Deposit USDC into a Circle Gateway non-custodial smart contract once. Call any of the 15 Arrays crypto endpoints. The server returns HTTP 402 with payment terms. Sign an EIP-3009 authorization and resubmit. Arrays returns the data.
How much does it cost to call an Arrays endpoint?
$0.008 or $0.03 per call, paid in USDC. See the appendix for the full endpoint list.
Do I need an API key to use Arrays via Nanopayments?
No. Authentication is the payment itself, via EIP-3009 user-signed authorization. Payments execute only from a user signature.