curl --request POST \
  --url https://api.prime.coinbase.com/v1/portfolios/{portfolio_id}/wallets/{wallet_id}/conversion \
  --header 'Content-Type: application/json' \
  --data '
{
  "amount": "50.50",
  "destination": "e84255eb-2e21-439e-a1d0-f5dd1e1292b9",
  "idempotency_key": "e84255eb-2e21-439e-a1d0-f5dd1e1292b9",
  "source_symbol": "USD",
  "destination_symbol": "USDC"
}
'

import requests

url = "https://api.prime.coinbase.com/v1/portfolios/{portfolio_id}/wallets/{wallet_id}/conversion"

payload = {
    "amount": "50.50",
    "destination": "e84255eb-2e21-439e-a1d0-f5dd1e1292b9",
    "idempotency_key": "e84255eb-2e21-439e-a1d0-f5dd1e1292b9",
    "source_symbol": "USD",
    "destination_symbol": "USDC"
}
headers = {"Content-Type": "application/json"}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    amount: '50.50',
    destination: 'e84255eb-2e21-439e-a1d0-f5dd1e1292b9',
    idempotency_key: 'e84255eb-2e21-439e-a1d0-f5dd1e1292b9',
    source_symbol: 'USD',
    destination_symbol: 'USDC'
  })
};

fetch('https://api.prime.coinbase.com/v1/portfolios/{portfolio_id}/wallets/{wallet_id}/conversion', 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.prime.coinbase.com/v1/portfolios/{portfolio_id}/wallets/{wallet_id}/conversion",
  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([
    'amount' => '50.50',
    'destination' => 'e84255eb-2e21-439e-a1d0-f5dd1e1292b9',
    'idempotency_key' => 'e84255eb-2e21-439e-a1d0-f5dd1e1292b9',
    'source_symbol' => 'USD',
    'destination_symbol' => 'USDC'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($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.prime.coinbase.com/v1/portfolios/{portfolio_id}/wallets/{wallet_id}/conversion"

	payload := strings.NewReader("{\n  \"amount\": \"50.50\",\n  \"destination\": \"e84255eb-2e21-439e-a1d0-f5dd1e1292b9\",\n  \"idempotency_key\": \"e84255eb-2e21-439e-a1d0-f5dd1e1292b9\",\n  \"source_symbol\": \"USD\",\n  \"destination_symbol\": \"USDC\"\n}")

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

	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.prime.coinbase.com/v1/portfolios/{portfolio_id}/wallets/{wallet_id}/conversion")
  .header("Content-Type", "application/json")
  .body("{\n  \"amount\": \"50.50\",\n  \"destination\": \"e84255eb-2e21-439e-a1d0-f5dd1e1292b9\",\n  \"idempotency_key\": \"e84255eb-2e21-439e-a1d0-f5dd1e1292b9\",\n  \"source_symbol\": \"USD\",\n  \"destination_symbol\": \"USDC\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.prime.coinbase.com/v1/portfolios/{portfolio_id}/wallets/{wallet_id}/conversion")

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

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"amount\": \"50.50\",\n  \"destination\": \"e84255eb-2e21-439e-a1d0-f5dd1e1292b9\",\n  \"idempotency_key\": \"e84255eb-2e21-439e-a1d0-f5dd1e1292b9\",\n  \"source_symbol\": \"USD\",\n  \"destination_symbol\": \"USDC\"\n}"

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

{
  "activity_id": "e84255eb-2e21-439e-a1d0-f5dd1e1292b9",
  "source_symbol": "USD",
  "destination_symbol": "USDC",
  "amount": "50.50",
  "destination": "e84255eb-2e21-439e-a1d0-f5dd1e1292b9",
  "source": "e84255eb-2e21-439e-a1d0-f5dd1e1292b9",
  "transaction_id": "e84255eb-2e21-439e-a1d0-f5dd1e1292b9"
}

{
  "code": "VALIDATION_ERROR",
  "message": "<string>",
  "subcode": "PORTFOLIO_ID_INVALID",
  "trace_id": "<string>"
}

{
  "code": "PERMISSION_DENIED",
  "message": "<string>",
  "subcode": "AUTH_RESOURCE_ACCESS_DENIED",
  "trace_id": "<string>"
}

{
  "code": "RESOURCE_NOT_FOUND",
  "message": "<string>",
  "subcode": "AUTH_RESOURCE_NOT_FOUND",
  "trace_id": "<string>"
}

{
  "code": "RATE_LIMIT_EXCEEDED",
  "message": "<string>",
  "subcode": "SERVER_RATE_LIMIT_EXCEEDED",
  "trace_id": "<string>"
}

{
  "code": "SERVICE_UNAVAILABLE",
  "message": "<string>",
  "subcode": "SERVER_MAINTENANCE_MODE_ACTIVE",
  "trace_id": "<string>"
}