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x402.outpimp.com coastFireCalculator
https://x402.outpimp.com/coastFireCalculator
answers 402
Coast FIRE calculator. Computes the lump sum needed today, invested with zero further contributions, to grow into your full retirement number by your target retirement age, plus (given an ongoing monthly contribution) a year-by-year projection of when your actual trajectory crosses that lump sum.
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.01
- Network
- base
- Pay to
- 0x548eFd4f4d4A5C3669dbb4CBB2B1A637FeeEc5F6
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 68 ms
- Payment options
- 2 usable of 2
- Last checked
- 2026-09-06T01:12:37.909Z (31d ago)
- Category
- other
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fx402.outpimp.com%2FcoastFireCalculator"