const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    walletId: '<string>',
    hostname: '<string>',
    price: '<string>',
    description: '<string>',
    intent: 'charge',
    acceptX402: true,
    acceptMPP: true
  })
};

fetch('https://api.prudra.dev/payments/challenge', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "mpp": "<string>",
  "x402": "<string>"
}