curl --request POST \
  --url https://api.zerion.io/v1/tx-subscriptions/ \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "callback_url": "https://webhook.site/fcd606d2-f5bd-4832-9874-ff07c980b5a3",
  "addresses": [
    "0x42b9df65b219b3dd36ff330a4dd8f327a6ada990"
  ]
}
'

import requests

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

payload = {
    "callback_url": "https://webhook.site/fcd606d2-f5bd-4832-9874-ff07c980b5a3",
    "addresses": ["0x42b9df65b219b3dd36ff330a4dd8f327a6ada990"]
}
headers = {
    "Authorization": "Basic <encoded-value>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Basic <encoded-value>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    callback_url: 'https://webhook.site/fcd606d2-f5bd-4832-9874-ff07c980b5a3',
    addresses: ['0x42b9df65b219b3dd36ff330a4dd8f327a6ada990']
  })
};

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"
	"strings"
	"net/http"
	"io"
)

func main() {

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

	payload := strings.NewReader("{\n  \"callback_url\": \"https://webhook.site/fcd606d2-f5bd-4832-9874-ff07c980b5a3\",\n  \"addresses\": [\n    \"0x42b9df65b219b3dd36ff330a4dd8f327a6ada990\"\n  ]\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Basic <encoded-value>")
	req.Header.Add("Content-Type", "application/json")

	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",
      "filters": {
        "exclude": {
          "types": [
            "send"
          ],
          "is_spam": true,
          "protocol_ids": [
            "uniswap-v3"
          ],
          "addresses": [
            "0x0000000000000000000000000000000000000001"
          ]
        }
      }
    },
    "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"
    }
  ]
}