vibgg
How to check these numbers
This site asks you to act on figures about your own money. You should not have to take them on trust — here is how to verify each one against its source.
Funding rates
Rates come from each venue's public, unauthenticated market-data endpoint. No API key is used anywhere in this site. Every page shows the timestamp of the observation it is displaying, so you can compare like for like: read the timestamp, then query the same contract on the venue's own endpoint.
Fee schedules
No exchange publishes its fee ladder through an API, so every tier here was read from the venue's own public fee page by hand and carries the date it was checked. Each row links to that page. If a number here disagrees with the exchange, the exchange is right and we are wrong — tell us. Fees →
The cost model
Nothing is hidden in the arithmetic. Total cost is trading fees minus rebate, plus funding, plus half the spread crossed on taker fills. The funding component reduces to a formula you can check on a calculator:
funding over a period = notional × rate × settlements settlements = days × 24 ÷ interval hours
Worked example. A $10,000 position held 30 days on an 8-hour contract crosses 90 settlements. At 0.0100% per settlement that is 10,000 × 0.0001 × 90 = $90. At 10x leverage the margin behind it is $1,000, so the same $90 is 9% of the capital at risk. Every figure on the contract pages is that arithmetic and nothing else.
Compare us against the source
The data behind these pages is available as JSON, free and without a key. Pull the same contract from the venue's endpoint and compare — that is the check we would run, and we would rather you ran it than believed us.
GET /api/v1/funding?symbol=BTC-USDT
/api/v1/funding?symbol=BTC-USDT
What we do not verify
Funding projections assume the current rate persists, which it will not; they describe the present cost of carry, not a forecast. Spreads are a single observation, not a time-weighted average. Fee schedules change without announcement, so a tier verified last quarter may be stale — the date on each row tells you when it was last checked.
If something is wrong
Report it and it gets corrected. A figure nobody can challenge is not a figure anyone should rely on. [email protected]