https://base-agent-preflight.bytoken2023.workers.dev/https://base-agent-preflight.bytoken2023.workers.dev/verifyhttps://base-agent-preflight.bytoken2023.workers.dev/openapi.jsonhttps://base-agent-preflight.bytoken2023.workers.dev/.well-known/agent-card.jsonhttps://base-agent-preflight.bytoken2023.workers.dev/.well-known/mcp.json