Create Swap Transaction by SOL

Creates an unsigned transaction for the best possible swap through the specified tokens provided by Pump.fun.

This endpoint does not submit the transaction to the network.

The endpoint allows you to specify priority fees and tips to later control the transaction inclusion and propagation. Refer to the Transaction Submission & Front-Running Protection & Transaction Bundle page for additional information about these parameters.

Request

Be aware that this endpoint is using a beta URL.

https://pump-ny.solana.dex.blxrbdn.com/

https://pump-uk.solana.dex.blxrbdn.com/

Method:

POST ./api/v2/pumpfun/swap-sol

Parameters:

Parameter	Type	Description
userAddress	string	Solana address which is placing swap.
bondingCurveAddress	string	Bonding Curve program address.
tokenAddress	string	Token address.
solAmount	double	The SOL amount users expected to swap.
solThreshold	double	The amount of SOL to determine if executing the transaction will be failed or not. When it is a buy token transaction, this is the maximum SOL users will spend. When it is a sell token transaction, this is the minimum SOL users will receive.
isBuy	boolean	Specify if this is a buy or sell transaction.
computeLimit	uint64	OPTIONAL. Specifies total compute limit to be allocated for all instructions within the created tx
computePrice	uint64	OPTIONAL. Specifies compute price in Lamport (0.000001 SOL = 1,000 Lamport) to be included as a part of instruction, known as priority fee.
tip	unit64	OPTIONAL. Specifies a tip amount that will be used to pay for front-running protection or bundle submission services. What is tip?

Request example:

HTTP

curl -X 'POST' \
  -H "Authorization: $AUTH_HEADER" \
  -H 'Content-Type: application/json' \
  'https://pump-ny.solana.dex.blxrbdn.com/api/v2/pumpfun/swap' \
  -d '{
    "userAddress": "9VUYmJa8NAB8uDe9P9aiFw3DEfezdkg5P5nQH6gcK5Kq",
    "bondingCurveAddress": "7BcRpqUC7AF5Xsc3QEpCb8xmoi2X1LpwjUBNThbjWvyo",
    "tokenAddress": "BAHY8ocERNc5j6LqkYav1Prr8GBGsHvBV5X3dWPhsgXw",
    "tokenAmount": 22002,
    "solThreshold": 0.0001,
    "isBuy": false
}'

Response:

Fields:

Field	Type	Description
transaction	TransactionMessage	See TransactionMessage below for details

TransactionMessage

Parameter		Description
content	string	Raw bytes of signed transaction (should be in base64)

Example:

JSON

{
    "id": 1,
    "result": {
        "transaction": {
            "content": "AQAA...QXBp"
        }
    },
    "jsonrpc": "2.0"
}