CoinMarketCap Api 调用元数据

Question

i'm working with the CoinMarketCap Api and trying to fetch the Metadata API, but still searching for the right path to output Logo.

$url = "https://pro-api.coinmarketcap.com/v1/cryptocurrency/info";

$headers = [
  'Accepts: application/json',
  'X-CMC_PRO_API_KEY: key'
];

$request = "{$url}"; // create the request URL

$curl = curl_init(); // Get cURL resource
// Set cURL options
curl_setopt_array($curl, array(
  CURLOPT_URL => $request,            // set the request URL
  CURLOPT_HTTPHEADER => $headers,     // set the headers 
  CURLOPT_RETURNTRANSFER => 1         // ask for raw response instead of bool
));

$response = curl_exec($curl); // Send the request, save the response
$json = json_decode($response);
curl_close($curl); // Close request

$logo = $json->data[array_search('bitcoin', array_column($json->data, 'slug'))]->logo;

echo $logo;

Can someone see what is wrong here?

https://coinmarketcap.com/api/documentation/v1/#operation/getV1CryptocurrencyInfo

Answer 1

You are missing the slug value in the curl request, and this value is required for the cryptocurrency/info endpoint. Below are two working examples of what you are trying to achieve, but in python and curl respectively so they can be easily run in the command line or REPL:

Curl:

curl -H "X-CMC_PRO_API_KEY: your-key-here" -H "Accept: application/json" -d "slug=bitcoin" -G https://pro-api.coinmarketcap.com/v1/cryptocurrency/info

Python:

from requests import Request, Session
from requests.exceptions import ConnectionError, Timeout, TooManyRedirects
import json

url = 'https://pro-api.coinmarketcap.com/v1/cryptocurrency/info'
parameters = {
  'slug':'bitcoin'
}
headers = {
  'Accepts': 'application/json',
  'X-CMC_PRO_API_KEY': 'your-key-here',
}

session = Session()
session.headers.update(headers)

try:
  response = session.get(url, params=parameters)
  data = json.loads(response.text)
  print(data)
except (ConnectionError, Timeout, TooManyRedirects) as e:
  print(e)