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Agent Payments Protocol
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Introduction

Supported Networks#

Onchain OS Payment is OKX's reference implementation of Agent Payments Protocol, currently deployed on X Layer.

Currently supported#

NetworkChainIndex
X Layer196

X Layer is an EVM-compatible ZK Layer-2 network launched by OKX. Onchain OS Payment chose X Layer as the first chain because:

  • Zero-gas experience: When paying with USDG / USD₮0, OKX covers the gas (see Gas Subsidy)
  • Sub-second finality: On-chain transactions finalize quickly, supporting high-frequency AI Agent calls
  • Full EVM compatibility: Existing EVM wallets and tooling work out of the box

Next#

QuickstartFastest paths for HTTP Sellers, Agent Sellers, and Agent BuyersCore ConceptsDefinitions, scenarios, and underlying tech for the four payment methods
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