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x402.outpimp.com bigNumberArithmetic
https://x402.outpimp.com/bigNumberArithmetic
answers 402
Arbitrary-precision integer arithmetic (add, subtract, multiply, power) beyond IEEE-754 float precision, using native BigInt. Operands are passed as digit strings so precision is never lost in transit. For power, the combined magnitude (base digit count x exponent) is capped at 50000 to bound response size, in addition to the per-operand digit cap and exponent cap.
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
- 153 ms
- Payment options
- 2 usable of 2
- Last checked
- 2026-09-06T01:12:37.187Z (31d ago)
- Category
- other
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fx402.outpimp.com%2FbigNumberArithmetic"