docs: explicit x402 Etherlink support callout - Base + Etherlink both declared

Author: endgegnerbert-tech

README.md

@@ -194,7 +194,9 @@ for (const entry of history) {
 
 ## x402 Protocol Support
 
-Agent Wallet natively supports the [x402 protocol](https://x402.org) — the open standard for HTTP 402 machine payments. Your agent can automatically pay any x402-enabled API (Stripe, Coinbase, etc.) using USDC on Base, while respecting on-chain spend limits.
+> **March 2026:** x402 just landed on Etherlink (Tezos L2). agent-wallet-sdk explicitly supports x402 on both **Base** (primary, USDC-native) and **Etherlink** — making it one of the first non-custodial SDKs to span both x402 chains. [Submit your agent to the x402 Bazaar](https://x402.org/bazaar) to get indexed.
+
+Agent Wallet natively supports the [x402 protocol](https://x402.org) — the open standard for HTTP 402 machine payments. Your agent can automatically pay any x402-enabled API (Stripe, Coinbase, etc.) using USDC on Base or Etherlink, while respecting on-chain spend limits.
 
 ### Quick Start
 
@@ -275,7 +277,7 @@ Client parses payment requirements (amount, token, recipient, network)
   ↓
 Budget check (client-side caps + on-chain spend limits)
   ↓
-AgentWallet executes USDC transfer on Base
+AgentWallet executes USDC transfer on Base or Etherlink
   ↓
 Client retries request with X-PAYMENT header (payment proof)
   ↓