Untch docs

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Untch documentationQuickstartWhat Untch is

Concepts

SpendIntentPolicyPreflightEnforcement modesReceipts and proofTrust Bureau

For operators

DashboardPolicies (operators)EscalationsControl channelsVault

For agents

ASP overviewASP toolsx402 paymentsUntch GuardLifestyle and Launch Pack

Reference

NetworksContractsPricingErrors

Security

InvariantsThreat model

How paid ASP tools settle on X Layer with OKX x402.

x402 payments

Paid Untch tools use the x402 protocol through OKX’s hosted facilitator on X Layer mainnet.

Network facts

ItemValue
ChainX Layer mainnet
chainId196
CAIP-2eip155:196
Settlement tokenUSDT0 0x779Ded…3736 (6 decimals)

There is no confirmed OKX x402 facilitator on testnet for this rail. Production agent payments use mainnet.

Call flow

  1. Agent GET/POST a priced route without payment.
  2. Server responds 402 with Payment-Required metadata.
  3. Buyer signs an EIP-3009 authorization for the exact amount.
  4. Facilitator settles; agent retries with proof of payment.
  5. Server returns the tool result.

Untch never holds the buyer private key. The seller authenticates to the facilitator with its OKX API credentials.

Client options

  • Custom buyer using OKX x402 fetch helpers
  • @untch/x402-guard for CBC + preflight before sign
  • Any agent runtime that can complete an x402 402 challenge

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