curl --request GET \
  --url https://api.anchorage-staging.com/v2/tax/gains/costbasis/{subaccountId} \
  --header 'Api-Access-Key: <api-key>'

import requests

url = "https://api.anchorage-staging.com/v2/tax/gains/costbasis/{subaccountId}"

headers = {"Api-Access-Key": "<api-key>"}

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

print(response.text)

const options = {method: 'GET', headers: {'Api-Access-Key': '<api-key>'}};

fetch('https://api.anchorage-staging.com/v2/tax/gains/costbasis/{subaccountId}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "data": [
    {
      "sold": {
        "assetType": "BTC",
        "quantity": "0.1"
      },
      "proceeds": {
        "assetType": "USD",
        "quantity": "300"
      },
      "taxYear": "2023",
      "saleDate": "2022-06-30T22:15:31.99999Z",
      "gainType": "LONG_TERM",
      "gain": {
        "assetType": "USD",
        "quantity": "20000"
      },
      "cost": {
        "assetType": "USD",
        "quantity": "305"
      }
    },
    {
      "sold": {
        "assetType": "ETH",
        "quantity": "1"
      },
      "proceeds": {
        "assetType": "USD",
        "quantity": "1850"
      },
      "taxYear": "2023",
      "saleDate": "2023-06-30T22:15:31.99999Z",
      "gainType": "SHORT_TERM",
      "gain": {
        "assetType": "USD",
        "quantity": "150"
      },
      "cost": {
        "assetType": "USD",
        "quantity": "1880"
      }
    }
  ]
}

{
  "message": "Missing required field 'amount'."
}

{
  "message": "Missing required field 'amount'."
}

{
  "message": "Missing required field 'amount'."
}

{
  "message": "Missing required field 'amount'."
}

{
  "message": "Missing required field 'amount'."
}

{
  "message": "Missing required field 'amount'."
}

{
  "message": "Missing required field 'amount'."
}