x402.crestal.dev provides programmatic access to Crestal-hosted autonomous agents on the Base network, exposing agent instances as simple HTTP endpoints for developers. It is optimized for testing, debugging, monitoring and integrating agent-driven workflows with a fixed low per-request price ($0.01); the sample agent Muninn (Ruihua's testing agent) is available at /0x994D0e1D2C2a24535CA9CaA61113C60aD4B02241.