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Per-agent rate limit with USDC enforcement

The problem

Rate limiting by IP or key is brittle when agents share infra. You want economic rate limiting — the agent runs out of money before it can DOS you.

What Spawnpay does

Spawnpay's paywall SDK uses pre-charge enforcement. When the agent's wallet hits $0, the next call throws INSUFFICIENT_FUNDS — no upstream call, no money moved. Economic rate limit, by design.

Code

const wrapped = paywall(
  { price: 0.001, vendor: 'SP_yourCode' },
  expensiveCall
);
// throws INSUFFICIENT_FUNDS once the agent's wallet runs out — no upstream call
60-SEC QUICKSTART → PLAYGROUND → TOP UP USDC →

What you get with $7 free credit

Every new spk_ wallet starts with $7. That covers 7,000 proxy calls, 1,400 cloud-scrapes, or 700 screenshots — enough to verify Spawnpay fits your workflow before topping up.

See also