Selling LLM Inference Per-Call to AI Agents: 99% Margin With x402

说明与用途

通过 x402 协议以 99% 利润率提供按调用计费的 LLM 推理，代理每次请求支付 0.02 USDC，服务自动处理支付并返回 JSON 响应。

问题

Providing high‑margin, payment‑gated LLM inference services to AI agents without building a full billing system.

结果

The service runs on a $4/month VPS, costs ~$0.0001 per call, and charges 0.02 USDC, yielding >99% margin. No billing system or accounts are required.

工作流

• 1. Agent sends POST to /analyze with product and text.
• 2. API responds 402 with payment requirements.
• 3. Agent pays 0.02 USDC on Base and retries with PAYMENT‑SIGNATURE header.
• 4. API forwards request to cheap LLM, receives result.
• 5. API returns strict JSON to agent.
• 6. PayAI facilitator settles payment automatically.

证据

My cost per call is roughly $0.0001; the price is $0.02. That's a >99% margin

来源

Day one, zero paying callers across all three services.

来源