Build Sell Transaction

POST

sell

curl --request POST \
  --url https://api.lasersell.io/v1/sell \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "mint": "So11111111111111111111111111111111111111112",
  "user_pubkey": "9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM",
  "amount_tokens": 1000000,
  "output": "SOL",
  "slippage_bps": 2000,
  "mode": "fast",
  "market_context": {},
  "tip_lamports": 123,
  "partner_fee_recipient": "<string>",
  "partner_fee_bps": 49,
  "partner_fee_lamports": 123
}
'

import requests

url = "https://api.lasersell.io/v1/sell"

payload = {
    "mint": "So11111111111111111111111111111111111111112",
    "user_pubkey": "9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM",
    "amount_tokens": 1000000,
    "output": "SOL",
    "slippage_bps": 2000,
    "mode": "fast",
    "market_context": {},
    "tip_lamports": 123,
    "partner_fee_recipient": "<string>",
    "partner_fee_bps": 49,
    "partner_fee_lamports": 123
}
headers = {
    "x-api-key": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'x-api-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    mint: 'So11111111111111111111111111111111111111112',
    user_pubkey: '9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM',
    amount_tokens: 1000000,
    output: 'SOL',
    slippage_bps: 2000,
    mode: 'fast',
    market_context: {},
    tip_lamports: 123,
    partner_fee_recipient: '<string>',
    partner_fee_bps: 49,
    partner_fee_lamports: 123
  })
};

fetch('https://api.lasersell.io/v1/sell', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.lasersell.io/v1/sell",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'mint' => 'So11111111111111111111111111111111111111112',
    'user_pubkey' => '9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM',
    'amount_tokens' => 1000000,
    'output' => 'SOL',
    'slippage_bps' => 2000,
    'mode' => 'fast',
    'market_context' => [
        
    ],
    'tip_lamports' => 123,
    'partner_fee_recipient' => '<string>',
    'partner_fee_bps' => 49,
    'partner_fee_lamports' => 123
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "x-api-key: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.lasersell.io/v1/sell"

	payload := strings.NewReader("{\n  \"mint\": \"So11111111111111111111111111111111111111112\",\n  \"user_pubkey\": \"9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM\",\n  \"amount_tokens\": 1000000,\n  \"output\": \"SOL\",\n  \"slippage_bps\": 2000,\n  \"mode\": \"fast\",\n  \"market_context\": {},\n  \"tip_lamports\": 123,\n  \"partner_fee_recipient\": \"<string>\",\n  \"partner_fee_bps\": 49,\n  \"partner_fee_lamports\": 123\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("x-api-key", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.lasersell.io/v1/sell")
  .header("x-api-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"mint\": \"So11111111111111111111111111111111111111112\",\n  \"user_pubkey\": \"9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM\",\n  \"amount_tokens\": 1000000,\n  \"output\": \"SOL\",\n  \"slippage_bps\": 2000,\n  \"mode\": \"fast\",\n  \"market_context\": {},\n  \"tip_lamports\": 123,\n  \"partner_fee_recipient\": \"<string>\",\n  \"partner_fee_bps\": 49,\n  \"partner_fee_lamports\": 123\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.lasersell.io/v1/sell")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["x-api-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"mint\": \"So11111111111111111111111111111111111111112\",\n  \"user_pubkey\": \"9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM\",\n  \"amount_tokens\": 1000000,\n  \"output\": \"SOL\",\n  \"slippage_bps\": 2000,\n  \"mode\": \"fast\",\n  \"market_context\": {},\n  \"tip_lamports\": 123,\n  \"partner_fee_recipient\": \"<string>\",\n  \"partner_fee_bps\": 49,\n  \"partner_fee_lamports\": 123\n}"

response = http.request(request)
puts response.read_body

{
  "tx": "AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...",
  "route": {
    "market_type": "pumpswap",
    "pool_id": "<string>"
  },
  "debug": {}
}

{
  "error": "invalid mint address"
}

{
  "error": "invalid mint address"
}

{
  "status": "unsupported",
  "reason": "no_route",
  "message": "No supported market found for this mint. Supported DEXs: PumpSwap, Raydium (CPMM, Launchpad), Meteora (DBC, DAMM v2), Pump.fun."
}

{
  "error": "invalid mint address"
}

{
  "error": "invalid mint address"
}

{
  "error": "invalid mint address"
}

SDK Examples

import { ExitApiClient, type BuildSellTxRequest } from "@lasersell/lasersell-sdk";

const client = ExitApiClient.withApiKey("YOUR_API_KEY");

const request: BuildSellTxRequest = {
  mint: "TOKEN_MINT_ADDRESS",
  user_pubkey: "YOUR_WALLET_PUBKEY",
  amount_tokens: 1_000_000,
  slippage_bps: 2_000,
  output: "SOL",
};

const response = await client.buildSellTx(request);
console.log("Unsigned tx (base64):", response.tx);

// Or get just the base64 string:
const txB64 = await client.buildSellTxB64(request);

from lasersell_sdk.exit_api import ExitApiClient, BuildSellTxRequest, SellOutput

client = ExitApiClient.with_api_key("YOUR_API_KEY")

request = BuildSellTxRequest(
    mint="TOKEN_MINT_ADDRESS",
    user_pubkey="YOUR_WALLET_PUBKEY",
    amount_tokens=1_000_000,
    slippage_bps=2_000,
    output=SellOutput.SOL,
)

response = await client.build_sell_tx(request)
print("Unsigned tx (base64):", response.tx)

use lasersell_sdk::exit_api::{ExitApiClient, BuildSellTxRequest, SellOutput};

let client = ExitApiClient::with_api_key("YOUR_API_KEY");

let request = BuildSellTxRequest {
    mint: "TOKEN_MINT_ADDRESS".into(),
    user_pubkey: "YOUR_WALLET_PUBKEY".into(),
    amount_tokens: 1_000_000,
    output: SellOutput::Sol,
    slippage_bps: 2_000,
    ..Default::default()
};

let response = client.build_sell_tx(&request).await?;
println!("Unsigned tx (base64): {}", response.tx);

import lasersell "github.com/lasersell/lasersell-sdk/go"

client := lasersell.NewExitAPIClientWithAPIKey("YOUR_API_KEY")

resp, err := client.BuildSellTx(ctx, lasersell.BuildSellTxRequest{
    Mint:         "TOKEN_MINT_ADDRESS",
    UserPubkey:   "YOUR_WALLET_PUBKEY",
    AmountTokens: 1_000_000,
    Output:       lasersell.SellOutputSOL,
    SlippageBps:  2_000,
})
if err != nil {
    log.Fatal(err)
}
fmt.Println("Unsigned tx (base64):", resp.Tx)

Error Responses

See Error Handling for the full error envelope specification and retryable error logic.

Authorizations

x-api-key

string

header

required

Your LaserSell API key. Obtain one from the LaserSell dashboard.

Body

application/json

mint

string

required

Token mint address (base58).

Example:

"So11111111111111111111111111111111111111112"

user_pubkey

string

required

Your wallet public key (base58).

Example:

"9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM"

amount_tokens

integer

required

Amount to sell in the token's atomic units.

Example:

1000000

output

enum<string>

required

Desired output asset.

Available options:

SOL,

USD1

Example:

"SOL"

slippage_bps

integer

required

Maximum slippage tolerance in basis points (e.g., 2000 = 20%).

Example:

2000

mode

enum<string>

default:fast

Routing mode hint.

Available options:

fast,

secure

market_context

object

Pre-resolved market context. Omit to let the server resolve automatically.

send_mode

enum<string>

Transaction send mode.

Available options:

helius_sender,

astralane,

rpc

tip_lamports

integer

Optional priority fee tip in lamports.

partner_fee_recipient

string

Partner fee recipient wallet (base58 pubkey).

partner_fee_bps

integer

Partner fee in basis points (max 50 = 0.5%). Mutually exclusive with partner_fee_lamports.

Required range: x <= 50

partner_fee_lamports

integer

Partner fee as flat SOL lamports (max 50,000,000). Mutually exclusive with partner_fee_bps.

Required range: x <= 50000000

Response

Unsigned sell transaction built successfully.

string

required

Base64-encoded unsigned Solana VersionedTransaction. Sign this locally with your keypair before submitting.

Example:

"AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA..."

route

object

Routing metadata.

Show child attributes

debug

object

Debug information (included when available).

Build Sell Transaction

curl --request POST \
  --url https://api.lasersell.io/v1/sell \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "mint": "So11111111111111111111111111111111111111112",
  "user_pubkey": "9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM",
  "amount_tokens": 1000000,
  "output": "SOL",
  "slippage_bps": 2000,
  "mode": "fast",
  "market_context": {},
  "tip_lamports": 123,
  "partner_fee_recipient": "<string>",
  "partner_fee_bps": 49,
  "partner_fee_lamports": 123
}
'

import requests

url = "https://api.lasersell.io/v1/sell"

payload = {
    "mint": "So11111111111111111111111111111111111111112",
    "user_pubkey": "9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM",
    "amount_tokens": 1000000,
    "output": "SOL",
    "slippage_bps": 2000,
    "mode": "fast",
    "market_context": {},
    "tip_lamports": 123,
    "partner_fee_recipient": "<string>",
    "partner_fee_bps": 49,
    "partner_fee_lamports": 123
}
headers = {
    "x-api-key": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'x-api-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    mint: 'So11111111111111111111111111111111111111112',
    user_pubkey: '9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM',
    amount_tokens: 1000000,
    output: 'SOL',
    slippage_bps: 2000,
    mode: 'fast',
    market_context: {},
    tip_lamports: 123,
    partner_fee_recipient: '<string>',
    partner_fee_bps: 49,
    partner_fee_lamports: 123
  })
};

fetch('https://api.lasersell.io/v1/sell', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.lasersell.io/v1/sell",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'mint' => 'So11111111111111111111111111111111111111112',
    'user_pubkey' => '9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM',
    'amount_tokens' => 1000000,
    'output' => 'SOL',
    'slippage_bps' => 2000,
    'mode' => 'fast',
    'market_context' => [
        
    ],
    'tip_lamports' => 123,
    'partner_fee_recipient' => '<string>',
    'partner_fee_bps' => 49,
    'partner_fee_lamports' => 123
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "x-api-key: <api-key>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.lasersell.io/v1/sell"

	payload := strings.NewReader("{\n  \"mint\": \"So11111111111111111111111111111111111111112\",\n  \"user_pubkey\": \"9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM\",\n  \"amount_tokens\": 1000000,\n  \"output\": \"SOL\",\n  \"slippage_bps\": 2000,\n  \"mode\": \"fast\",\n  \"market_context\": {},\n  \"tip_lamports\": 123,\n  \"partner_fee_recipient\": \"<string>\",\n  \"partner_fee_bps\": 49,\n  \"partner_fee_lamports\": 123\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("x-api-key", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.lasersell.io/v1/sell")
  .header("x-api-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"mint\": \"So11111111111111111111111111111111111111112\",\n  \"user_pubkey\": \"9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM\",\n  \"amount_tokens\": 1000000,\n  \"output\": \"SOL\",\n  \"slippage_bps\": 2000,\n  \"mode\": \"fast\",\n  \"market_context\": {},\n  \"tip_lamports\": 123,\n  \"partner_fee_recipient\": \"<string>\",\n  \"partner_fee_bps\": 49,\n  \"partner_fee_lamports\": 123\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.lasersell.io/v1/sell")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["x-api-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"mint\": \"So11111111111111111111111111111111111111112\",\n  \"user_pubkey\": \"9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM\",\n  \"amount_tokens\": 1000000,\n  \"output\": \"SOL\",\n  \"slippage_bps\": 2000,\n  \"mode\": \"fast\",\n  \"market_context\": {},\n  \"tip_lamports\": 123,\n  \"partner_fee_recipient\": \"<string>\",\n  \"partner_fee_bps\": 49,\n  \"partner_fee_lamports\": 123\n}"

response = http.request(request)
puts response.read_body

{
  "tx": "AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...",
  "route": {
    "market_type": "pumpswap",
    "pool_id": "<string>"
  },
  "debug": {}
}

{
  "error": "invalid mint address"
}

{
  "error": "invalid mint address"
}

{
  "status": "unsupported",
  "reason": "no_route",
  "message": "No supported market found for this mint. Supported DEXs: PumpSwap, Raydium (CPMM, Launchpad), Meteora (DBC, DAMM v2), Pump.fun."
}

{
  "error": "invalid mint address"
}

{
  "error": "invalid mint address"
}

{
  "error": "invalid mint address"
}

Getting Started

LaserSell API

Exit Intelligence Stream

Transaction Submission

SDK Guides

Reference

SDK Examples

Error Responses

Authorizations

Body

Response

​SDK Examples

​Error Responses

Authorizations

Body

Response

SDK Examples

Error Responses