x402toll.com investing npv-irr

https://x402toll.com/v1/investing/npv-irr

answers 402

Net present value and internal rate of return for a cash-flow series (index 0 = today, usually a negative outlay), plus the profitability index and an accept/reject call.

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.

Price: $0.05
Network: base
Pay to: 0x1C9923489CD7D75Dd2f6735c48090b8bD4c7E5a9
Spec dialect: v2 (declares x402Version 2)
Transport: PAYMENT-REQUIRED header
HTTP method: POST
Response latency: 130 ms
Payment options: 1 usable of 1
Last checked: 2026-08-15T14:33:54.576Z (4d ago)
Category: search

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fx402toll.com%2Fv1%2Finvesting%2Fnpv-irr"