Хватит писать в личку вслепую. Начните получать клиентов.

curl -G https://api.tomba.io/v1/domain-search \
  --data-urlencode "domain=piedpiper.com" \
  -H "X-Tomba-Key: $TOMBA_API_KEY" \
  -H "X-Tomba-Secret: $TOMBA_SECRET_KEY"

const params = new URLSearchParams({
  domain: "piedpiper.com"
});
const res = await fetch(`https://api.tomba.io/v1/domain-search?${params}`, {
  headers: {
    "X-Tomba-Key": process.env.TOMBA_API_KEY,
    "X-Tomba-Secret": process.env.TOMBA_SECRET_KEY
  }
});
const { data } = await res.json();

import os, requests

res = requests.get(
    "https://api.tomba.io/v1/domain-search",
    params={
        "domain": "piedpiper.com",
    },
    headers={
        "X-Tomba-Key": os.environ["TOMBA_API_KEY"],
        "X-Tomba-Secret": os.environ["TOMBA_SECRET_KEY"],
    },
)
data = res.json()["data"]