How I Built an Autonomous AI Agent That Earns USDC While I Sleep

Description and use

An autonomous agent on a VPS uses an LLM to perform tasks, pays for them via x402, receives USDC, and automatically reinvests profits.

Problem

Developers want a repeatable, low‑cost system that autonomously performs a billable task, receives stablecoin payment, and reinvests profits without relying on proprietary SaaS.

Outcome

The agent processed jobs continuously for three weeks on a single‑GPU VPS, earning USDC with minimal overhead and automatically reinvesting surplus.

Workflow

• 1. Pull job from Redis/SQLite queue
• 2. Execute job via LM adapter (OpenAI or local Llama‑2‑7B via TGI)
• 3. Build x402 payment payload and send request to protected endpoint
• 4. Receive 402 response, sign USDC transfer with wallet, retry request
• 5. Verify USDC receipt on Base, log profit, sweep excess to profit address
• 6. Sleep 5 s and repeat

Evidence

The agent never holds more than the USDC needed to pay for the next call; any excess is swept to a separate “profit” address hourly.

Source

I selected Llama‑2‑7B served via text‑generation‑inference (TGI) on a single‑GPU VPS.

Source