Returns how much you can move through Rapid Transfer into one venue right now. Each supported venue is served by its own pool, so pools are queried one at a time — query the pool at the receiving venue, since that is the one paying out to the destination account. The value already accounts for the 80% per-transfer cap, so compare your transfer amount against it directly. Errors are returned with HTTP 200 and a code other than 200, so check the code rather than the HTTP status.
| Time | Status | User Agent | |
|---|---|---|---|
Retrieving recent requests… | |||
API Key: user or trading portfolio · Permission: READ
For what Rapid Transfer covers and the per-venue pool sizes, see Rapid Transfer.
Request
| Field name | Type | Necessary | Remarks |
|---|---|---|---|
| pool | String | Y | Binance, RapidX-Binance, Bybit, OKX, RapidX-OKX, Gate, Bitget, Deribit or Coinbase. Not case-sensitive. RapidX is split by underlying exchange — there is no plain RapidX value |
| currency | String | Y | Currently USDT only. Not case-sensitive |
Unifiedpool was retired in the 26 Aug 25th release and is no longer a valid value. The Funding Account pool is gone, so transfers involving your Funding Account are not eligible for Rapid Transfer.
Response
| Field name | Type | Remarks |
|---|---|---|
| available | String | The most you can move into this venue right now, denominated in currency. The 80% per-transfer cap is already applied — compare your amount against this value directly |
{
"code": 200,
"message": "success",
"data": {
"available": "320000"
}
}Treat the value as a snapshot rather than a reservation: quota is consumed when a transfer executes, not when you read it, so another client can take the room in between. If that happens the transfer is not rejected — it continues through the standard transfer flow.
Errors
Errors are returned with HTTP 200 and a code other than 200. Check code, not the HTTP status.
code | message | When |
|---|---|---|
-1 | Rapid transfer does not support this currency or exchange | pool is not one of the values above — including the retired Unifiedpool — or is missing; or currency is not supported |
1001 | Invalid Constraints Required [{currency}] | currency is missing |