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stats.openverbs.com v1 regression
https://stats.openverbs.com/v1/regression
answers 402
Ordinary-least-squares linear regression of y on x: slope, intercept, correlation r and coefficient of determination r². Pass predictAt to also evaluate the fitted line at a given x. Rejected as a clean 400 if lengths differ or x has zero variance.
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.004
- Network
- base
- Pay to
- 0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 231 ms
- Payment options
- 1 usable of 1
- Last checked
- 2026-09-06T01:20:13.204Z (23d ago)
- Category
- data
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fstats.openverbs.com%2Fv1%2Fregression"