What Does an AI Agent Actually Pay Across Five x402 Network Routes?

Short answer (November 10, 2026): Script Master Labs publicly documents five network payment routes across two facilitators: OMNIGATE handles Base and Arc, while 402Proof handles Solana, XRP Ledger, and Xahau. A route is not the same thing as a token: USDC appears on multiple networks; XRP and XAH are native assets on different networks; and RLUSD is part of a separately documented 402Proof invoice workflow. The published facilitator fee varies by route, so there is no honest universal five-rail fee.

Current published facilitator terms

Route	Facilitator	Published payment asset / mode	Published facilitator tariff	Important boundary
Base (eip155:8453)	OMNIGATE	USDC, x402 exact	0.005 USDC per settlement, waived for fee-less payments within a stated daily allowance	500 across all payTos and 100 per payTo, UTC; otherwise a fee leg is needed or fee-less requests are refused
Arc (eip155:5042)	OMNIGATE	USDC, x402 exact	Same 0.005 USDC model	Confirm the fresh offer's Arc network and receiver
Solana mainnet	402Proof	USDC over Solana, standard sidecar	0.005 USDC per settlement	Published as separate in-transaction facilitator transfer; do not confuse USDC on Solana with native SOL
XRP Ledger (xrpl:0)	402Proof standard v2	Native XRP / exact	USD $0.0100 per completed settlement, accrued to merchant	Public terms say automatic collection was not live; loyalty reductions depend on prior successful settlements
Xahau (xrpl:21337)	402Proof	Native XAH / exact	0.01 XAH per third-party settlement	A fee denominated in XAH is not a fixed USD charge

The fee table summarizes Script Master Labs' published terms, verified live on 2026-11-05 against the facilitators' own published terms; it is not a fresh production settlement audit. The relevant first-party records are the facilitator seller page, offer/fee ledger and dated quote-provenance page. At request time, the fresh challenge and the applicable onboarding agreement control.

Why is the OMNIGATE waiver easy to misunderstand?

The published OMNIGATE base facilitator tariff is 0.005 USDC. A standard payment without a fee leg can settle with its facilitator fee waived while the operator's daily budget remains available. The published limits are 500 settlements per UTC day across all payTos and 100 per payTo. After the relevant allowance, a fee-less payment is refused until reset; a compatible payment including the fee leg can settle and pay it. Merchant route pricing is separate from this facilitator tariff.

What happens on XRP Ledger?

The standard XRPL 402Proof tariff is described as USD $0.0100 accrued, not a $0.0100 charge automatically withdrawn on-chain. The public schedule reduces it to $0.0080 after 100 prior settlements, $0.0070 after 1,000, and $0.0050 after 10,000. That distinction matters to agents and merchants building accurate reconciliation. It is different from the legacy/invoice workflow, which publishes a 0.01 fee denominated in the invoice asset, including RLUSD where supported. Do not mix their fee statements.

The five-route versus five-asset confusion

These are five network routes, not an assertion that every route accepts five assets. In particular:

• Solana is a blockchain network; SOL is its native token. SML's cited standard-route statement specifically documents USDC on Solana.
• RLUSD is a stablecoin, and SML's first-party records describe 402Proof invoice-based RLUSD pricing on XRP Ledger. That does not make RLUSD interchangeable with XRP on the standard v2 route.
• Base and Arc are distinct networks, even though both offers can use USDC.

When a product says “five rails,” demand the actual combinations of (scheme, network, asset, payTo) rather than counting product names or logos.

How to quote a complete agent request

The total spend estimate should state merchant's resource price + applicable facilitator fee + any known network-related or service charges, identifying who actually bears each component. Quote in the required asset and network; never silently convert XAH or XRP fee amounts into stable USD without a dated rate and conversion method. A facilitator fee that is accrued is not the same thing as an on-chain debit. A publicly quoted route is not proof that a particular settlement has succeeded today.

Where to start: Compare SML's facilitators, inspect all offers, then review the starter evidence.

Sources and method: SML first-party fee schedules above; x402 v2 network/payment requirements; Solana x402 v2 payment guide. No new payment was submitted for this article.