curl --request POST \
  --url https://karibu.briq.tz/v1/voice/calls/audio/upload \
  --header 'Content-Type: multipart/form-data' \
  --header 'X-API-Key: <api-key>' \
  --form 'receiver_number=<string>' \
  --form file='@example-file'

import requests

url = "https://karibu.briq.tz/v1/voice/calls/audio/upload"

files = { "file": ("example-file", open("example-file", "rb")) }
payload = { "receiver_number": "<string>" }
headers = {"X-API-Key": "<api-key>"}

response = requests.post(url, data=payload, files=files, headers=headers)

print(response.text)

const form = new FormData();
form.append('receiver_number', '<string>');
form.append('file', '<string>');

const options = {method: 'POST', headers: {'X-API-Key': '<api-key>'}};

options.body = form;

fetch('https://karibu.briq.tz/v1/voice/calls/audio/upload', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>"
    }
  ]
}