curl --request GET \
  --url https://api.zerion.io/v1/tx-subscriptions/ \
  --header 'Authorization: Basic <encoded-value>'

import requests

url = "https://api.zerion.io/v1/tx-subscriptions/"

headers = {"Authorization": "Basic <encoded-value>"}

response = requests.get(url, headers=headers)

print(response.text)

const options = {method: 'GET', headers: {Authorization: 'Basic <encoded-value>'}};

fetch('https://api.zerion.io/v1/tx-subscriptions/', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://api.zerion.io/v1/tx-subscriptions/"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("Authorization", "Basic <encoded-value>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

{
  "data": [
    {
      "type": "transactions_subscription",
      "id": "52d994a173d755e99845e861d534a419",
      "attributes": {
        "callback_url": "https://webhook.site/fcd606d2-f5bd-4832-9874-ff07c980b5a3",
        "created_at": "2022-08-15T11:26:31+00:00",
        "updated_at": "2022-08-15T11:26:31+00:00"
      },
      "relationships": {
        "chains": [
          {
            "links": {
              "related": "https://api.zerion.io/v1/chains/polygon"
            },
            "data": {
              "type": "chains",
              "id": "polygon"
            }
          }
        ]
      }
    }
  ]
}

{
  "errors": [
    {
      "title": "Parameter is malformed",
      "detail": "Some validation errors will be described here"
    }
  ]
}

{
  "errors": [
    {
      "title": "Unauthorized Error",
      "detail": "The API key is invalid, please, make sure that you are using a valid key"
    }
  ]
}

{
  "errors": [
    {
      "title": "Too many requests",
      "detail": "Your request had been throttled"
    }
  ]
}