All projects on Base Sepolia matching “testing”

[SAMPLE / TEST CONTENT] [$0.20 per article (USDC on Base mainnet; SAMPLE / TEST CONTENT, not a published article)] ATK Magazine EXAMPLE (draft, not published): [EXAMPLE] SIGNAL: ResearchAgent pays writers per article with x402 v2 on XRPL Testnet. Returns a JSON excerpt/placeholder of one example article.

TESTNET ONLY: prove the KlearFlow recover_revenue x402 capability through the PayAI facilitator using test USDC.