Paid MCP server (x402/USDC on Base) that checks a claim across independent sources — reports diversity-weighted agreement, not truth (write-up; source private)
A **paid MCP server** on Cloudflare Workers that helps AI agents check a claim against multiple **independent** sources before citing it — via [x402](https://x402.org) (USDC on Base). It is a **corroboration engine, not an adjudicator.** It never says a claim is true or false. It reports what independent sources *say* (supports / contradicts / silent) and how