const options = {method: 'GET'};

fetch('https://swap.ggp.gg/api/{blockchain}/permit/data', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

curl --request GET \
  --url https://swap.ggp.gg/api/{blockchain}/permit/data

import requests

url = "https://swap.ggp.gg/api/{blockchain}/permit/data"

response = requests.get(url)

print(response.text)

{
  "alreadyApproved": true,
  "alreadyPermit": true,
  "data": {
    "permit": {
      "details": {
        "amount": "0xffffffffffffffffffffffffffffffffffffffff",
        "expiration": "0x69daab1d",
        "nonce": "0x0",
        "token": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2"
      },
      "sigDeadline": "0x69b46f9d",
      "spender": "0xeee3fdcc5b9d7821570294b26070b2f45cfd8aec"
    },
    "typedData": {
      "domain": {
        "chainId": "0x1",
        "name": "Permit2",
        "verifyingContract": "0x000000000022d473030f116ddee9f6b43ac78ba3"
      },
      "message": {
        "details": {
          "amount": "0xffffffffffffffffffffffffffffffffffffffff",
          "expiration": "0x69daab1d",
          "nonce": "0x0",
          "token": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2"
        },
        "sigDeadline": "0x69b46f9d",
        "spender": "0xeee3fdcc5b9d7821570294b26070b2f45cfd8aec"
      },
      "primaryType": "PermitSingle",
      "types": {
        "EIP712Domain": [
          {
            "name": "name",
            "type": "string"
          },
          {
            "name": "chainId",
            "type": "uint256"
          },
          {
            "name": "verifyingContract",
            "type": "address"
          }
        ],
        "PermitDetails": [
          {
            "name": "token",
            "type": "address"
          },
          {
            "name": "amount",
            "type": "uint160"
          },
          {
            "name": "expiration",
            "type": "uint48"
          },
          {
            "name": "nonce",
            "type": "uint48"
          }
        ],
        "PermitSingle": [
          {
            "name": "details",
            "type": "PermitDetails"
          },
          {
            "name": "spender",
            "type": "address"
          },
          {
            "name": "sigDeadline",
            "type": "uint256"
          }
        ]
      }
    }
  }
}

{
  "code": 400,
  "error": "string"
}

{
  "code": 408,
  "error": "string"
}

{
  "code": 500,
  "error": "string"
}