Model Order Reduction

The lepton was the smallest coin of the Greek world, one hundredth of a drachma. The name survived until the euro replaced the drachma in 2002. An obol was a small silver coin worth one sixth of a drachma in classical Athens.

Arc is a layer-one blockchain from Circle where gas is paid in USDC and finality lands in under a second. Native stablecoin gas and sub-second settlement make payments smaller than a cent economical for the first time.

x402 revives the HTTP 402 Payment Required status code. A server answers a request with 402 and a price; the client pays and retries; the resource is returned on settlement. It turns any endpoint into a pay-per-request resource.

A nanopayment is a payment too small to have been worth making before fees: a fraction of a cent, per article, per call, per second. Circle Gateway batches many of them so each one clears gas-free.

When an AI agent answers a question it grounds the answer in sources it retrieved. Today those sources are read for free. An agent can hold a wallet and pay per call, which lets it settle a tiny fee to each source it actually used.

USDC is a fully reserved digital dollar issued by Circle. On Arc it is both the unit of account and the gas token, so a payment and its fee are denominated in the same dollar.

How native transaction assertions could enforce a transaction's final outcome. The Ethereum Foundation's Trillion Dollar Security initiative has identified blind signing and transaction uncertainty as a user experience risk, and is exploring native transactio Introducing zkAPI: private usage credits for any API. tl;dr: zkAPI lets you pay for a metered API without being known. Deposit credits into an Ethereum vault once, then authorize bounded usage with zero-knowledge proofs instead of an Glamsterdam Testnet Announcement. Glamsterdam follows the Fusaka upgrade, advancing Ethereum's L1 scaling roadmap with enshrined proposer-builder separation, block-level access lists, and changes to gas pr

Former FTX COO says Netflix’s ‘Altruists’ trailer ‘made me physically throw up’. Former FTX COO Constance Wang says Netflix's "The Altruists" misrepresents FTX's collapse and turns it into a love story. Blockchain.com seeks CFTC greenlight for US prediction markets, crypto derivatives trading: CNBC. Blockchain.com has applied for DCM and FCM licenses to offer ahead of a planned $500 million IPO. Ledger investigates wallet drains involving CryptoBilis buyers; estimate tops $86 million in losses. Ledger said it is investigating reports of fund losses from users in Southeast Asia who bought its products from reseller CryptoBilis. US targets $1 billion Iran-linked crypto seizure, Bessent says ‘w

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