Second Opinion is a Model Context Protocol (MCP) server: Adversarial verification for AI agents - pay an independent skeptic per verdict in USDC via x402. In practice that means any MCP-compatible AI assistant can call Second Opinion's tools directly — the model decides when to use them in a conversation or agent run.
It's a hosted (remote) server — point your client at https://secondopinionx402.com/mcp and you're connected, with nothing to install locally. The current release is v0.2.2.
Second Opinion is listed under AI & Agents on mcp.site and works with any MCP client — Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Zed and the rest of the ecosystem — using the install snippets below. If you maintain Second Opinion for secondopinionx402.com, claim this listing to verify ownership, earn the Verified badge, and keep the details current.