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Xenarch is a non-custodial payment layer that lets publishers charge AI agents for content and services using the x402 protocol. Agents pay USDC on Base L2 through a splitter smart contract. Publishers receive funds directly — Xenarch never holds anyone’s money.

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What Xenarch does

  • For publishers: Gate content behind HTTP 402 responses. Bots pay USDC, humans pass through unaffected.
  • For agents: Discover pricing via pay.json or HTTP 402, pay on-chain, receive time-limited access tokens.
  • For platforms: Integrate via Python/TypeScript SDKs, MCP server, or CMS plugins.

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How payments work

Agent requests content → Server returns HTTP 402 with gate details
Agent sends USDC to splitter contract → Contract splits to publisher + treasury
Agent submits tx hash to verify endpoint → Server returns access token
Agent re-requests content with Bearer token → Server returns content
Every payment is a single on-chain USDC transfer. No deposits, no balances, no custody. The splitter contract has an immutable fee cap of 0.99% (currently 0%).

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Key properties

PropertyValue
SettlementUSDC on Base L2
Max payment$1.00 per transaction
Fee0% (capped at 0.99% forever)
CustodyNone — permanently non-custodial
VerificationOn-chain, auditable on Basescan
Protocolx402 (HTTP 402 Payment Required)

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Next steps

Agent quickstart

Start paying for gated content in 5 minutes.

Publisher quickstart

Start charging AI agents for your content.

API reference

Full REST API documentation.

Examples

Working code for Python, LangChain, CrewAI, and MCP.