curl --request GET \
  --url https://api.kamino.finance/yields/principal-tokens

const options = {method: 'GET'};

fetch('https://api.kamino.finance/yields/principal-tokens', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.kamino.finance/yields/principal-tokens"

response = requests.get(url)

print(response.text)

false

[
  {
    "apy": "0.2",
    "tokenMint": "So11111111111111111111111111111111111111112"
  }
]

{
  "error": "An internal error occurred"
}