Discover and search x402-enabled services via the x402.direct directory API. Use when an agent needs to find paid API services that accept x402 payments, browse the x402 ecosystem, look up service details, check trust scores, or search for specific capabilities (AI, image, weather, search, data, audio, video, developer, finance, language, storage). Triggers on "find x402 service", "x402 directory", "search x402", "x402 API", "paid API search", "x402.direct", agent-to-agent payments, crypto-native API discovery.