Unable to send payment using API. Please help.

+1 vote

I'm using PHP & Curl and can generate bitcoin addresses, get my balance and interact with my wallet, but for some reason I am unable to send a payment via the blockchain API v2. Following is my PHP code:

$my_api_key = 'xxxxx';
$second_password = "xxxx";
$amount = '30000';
$to = '1AQDhKrjvAonjLAUv4PzM9NjGzZZ4HEpU1';
$fee = '2000';

$root_url = 'http://localhost:3000/merchant/'.$guid.'/payment';
$parameters = 'to='.$to.'&amount='.$amount.'&password='.$firstpassword.'&fee='.$fee.'&second_password='.$second_password;

$response = Curl::to($root_url . '?' . $parameters)->get();

return $response;

 I am getting the following error : - 
{"error":"Unexpected error, please try again"}
Apr 3, 2018 in Blockchain by Perry
• 16,450 points

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Best answer

Firstly, check your passwords, your API code and your wallet ID. If the problem still persists, then make sure that the blockchain wallet services are running on your server on port 3000. 

You can check the working of blockchain wallet services by hitting the url in browser i.e. http://localhost:3000. if its giving response error "Not found" that means your blockchain wallet services are running. To send bitcoins to many users at a time, you can use the following API:


or use the following:

$address = null;

try {
    // Uncomment to send
    // var_dump($Blockchain->Wallet->send($address, "0.001"));
} catch (\Blockchain\Exception\ApiError $e) {
    echo $e->getMessage() . '<br />';

// Multi-recipient format
$recipients = array();
$recipients[$address] = "0.001";

try {
    // Uncomment to send
// var_dump($Blockchain->Wallet->sendMany($recipients));
} catch (Blockchain_ApiError $e) {
echo $e->getMessage() . '<br />';
answered Apr 3, 2018 by Christine
• 15,790 points

selected Aug 3, 2018 by Omkar

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