curl --request POST \
  --url https://api.despezzas.com/v1/categorization-rules/preview \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "match_fields": [
    "merchant_name"
  ],
  "rule_id": null,
  "transaction_id": "8f1c2a34-5b6d-4e7f-8a9b-0c1d2e3f4a5b"
}
'

const options = {
  method: 'POST',
  headers: {Authorization: 'Basic <encoded-value>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    match_fields: ['merchant_name'],
    rule_id: null,
    transaction_id: '8f1c2a34-5b6d-4e7f-8a9b-0c1d2e3f4a5b'
  })
};

fetch('https://api.despezzas.com/v1/categorization-rules/preview', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.despezzas.com/v1/categorization-rules/preview"

payload = {
    "match_fields": ["merchant_name"],
    "rule_id": None,
    "transaction_id": "8f1c2a34-5b6d-4e7f-8a9b-0c1d2e3f4a5b"
}
headers = {
    "Authorization": "Basic <encoded-value>",
    "Content-Type": "application/json"
}

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

print(response.text)

package main

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

func main() {

	url := "https://api.despezzas.com/v1/categorization-rules/preview"

	payload := strings.NewReader("{\n  \"match_fields\": [\n    \"merchant_name\"\n  ],\n  \"rule_id\": null,\n  \"transaction_id\": \"8f1c2a34-5b6d-4e7f-8a9b-0c1d2e3f4a5b\"\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))

}

{
  "available_criteria": [
    {
      "field": "merchant_name",
      "normalized": "pao de acucar",
      "value": "Pão de Açúcar"
    }
  ],
  "is_expense": true,
  "match_fields": [
    "merchant_name"
  ],
  "matching_existing_count": 14,
  "source_id": "3a9e7d21-4b5c-4d6e-8f70-1a2b3c4d5e6f",
  "source_kind": "ACCOUNT",
  "source_transaction_id": "8f1c2a34-5b6d-4e7f-8a9b-0c1d2e3f4a5b",
  "suggested_match_fields": [
    "merchant_name"
  ]
}

{
  "message": "Credenciais de API inválidas",
  "statusCode": 401,
  "error": "Unauthorized"
}

{
  "message": "Credenciais de API inválidas",
  "statusCode": 401,
  "error": "Unauthorized"
}

{
  "message": "Credenciais de API inválidas",
  "statusCode": 401,
  "error": "Unauthorized"
}

{
  "message": "Credenciais de API inválidas",
  "statusCode": 401,
  "error": "Unauthorized"
}

{
  "message": "Credenciais de API inválidas",
  "statusCode": 401,
  "error": "Unauthorized"
}