{"ok":true,"product":"chat-sample","sample":true,"sample_prompt":"Explain why x402 pay-per-call APIs are useful to an AI agent builder.","response":{"object":"chat.completion.sample","model":"grok-4.5-high","choices":[{"index":0,"message":{"role":"assistant","content":"**x402 pay-per-call APIs** let AI agents pay tiny amounts per API request via the HTTP 402 status, enabling seamless, autonomous micropayments without accounts, keys, or subscriptions.\n\nThis is useful to agent builders because it supports scalable, on-demand tool use where agents can discover, call, and fund external services dynamically in real time with crypto, reducing friction and costs for high-volume or experimental agent workflows."}}]},"paid_endpoint":"/x402/v1/chat/completions","paid_price":"$0.01","cache":{"status":"hit","generated_at":"2026-08-14T12:56:40.326Z","expires_at":"2026-08-14T13:56:40.326Z"}}