Question 1

What is @relayos/mcp-paywall?

Accepted Answer

It is x402 / HTTP-402 paywall middleware that lets autonomous AI agents pay per request in USDC on Base. It provides drop-in monetization for MCP servers and APIs and is published on npm.

Question 2

How do AI agents pay with x402?

Accepted Answer

When an agent requests a protected endpoint, the server returns HTTP 402 Payment Required with payment details. The agent pays in USDC on Base, then retries the request and is served the response. No human is in the loop.

Question 3

Does it support XRPL or Xahau?

Accepted Answer

ScriptMasterLabs builds payment rails on XRPL and Xahau (via Xahau Hooks) alongside the x402 USDC-on-Base fast path, so agents can settle on the network that fits the use case.

ScriptMasterLabs | x402 Paywall