bykaranteli.com
Five minute open interest history for the major perpetuals in base units and USD, normalised across symbols and retained on our side, so one query replaces per-symbol paginated pulls against exchange endpoints.
Go to this service →Our latest check (2026-10-11)
- Answering
- Yes — valid x402 payment terms
- Time to answer
- 65 ms
- Price
- $0.100 per call
- Paying buyers, last 30 days
- 1 (directory's own records)
- Paid calls, last 30 days
- 1
- Category
- Calculators and conversions
- Address
- https://bykaranteli.com/api/x402/oi-history
Accuracy: paid answers checked against an independent record
Not yet in our paid checks. A seller we have not checked has neither passed nor failed.
For agents
This page as JSON: /sellers/4540e1162c7e.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).