curl --request POST \
  --url https://production.hifi.com/v3/rfis/{rfiId}/submissions \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data @- <<EOF
{
  "items": [
    {
      "requestItemId": "3f7c1e90-2a4b-4d61-9c0e-5b8f2d6a1e34",
      "fileId": "file_7bV1aLcs3Kf9dQ2mNpXwZ"
    },
    {
      "requestItemId": "3f7c1e90-2a4b-4d61-9c0e-5b8f2d6a1e34",
      "fileId": "file_9aB0xY4mNpXwZ7bV1aLdt"
    },
    {
      "requestItemId": "6b2d4a81-7c05-4e39-8f1a-2d9c3e7b5041",
      "answerText": "Salary from the user's employer, with payslips attached."
    }
  ]
}
EOF

import requests

url = "https://production.hifi.com/v3/rfis/{rfiId}/submissions"

payload = { "items": [
        {
            "requestItemId": "3f7c1e90-2a4b-4d61-9c0e-5b8f2d6a1e34",
            "fileId": "file_7bV1aLcs3Kf9dQ2mNpXwZ"
        },
        {
            "requestItemId": "3f7c1e90-2a4b-4d61-9c0e-5b8f2d6a1e34",
            "fileId": "file_9aB0xY4mNpXwZ7bV1aLdt"
        },
        {
            "requestItemId": "6b2d4a81-7c05-4e39-8f1a-2d9c3e7b5041",
            "answerText": "Salary from the user's employer, with payslips attached."
        }
    ] }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    items: [
      {
        requestItemId: '3f7c1e90-2a4b-4d61-9c0e-5b8f2d6a1e34',
        fileId: 'file_7bV1aLcs3Kf9dQ2mNpXwZ'
      },
      {
        requestItemId: '3f7c1e90-2a4b-4d61-9c0e-5b8f2d6a1e34',
        fileId: 'file_9aB0xY4mNpXwZ7bV1aLdt'
      },
      {
        requestItemId: '6b2d4a81-7c05-4e39-8f1a-2d9c3e7b5041',
        answerText: 'Salary from the user\'s employer, with payslips attached.'
      }
    ]
  })
};

fetch('https://production.hifi.com/v3/rfis/{rfiId}/submissions', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://production.hifi.com/v3/rfis/{rfiId}/submissions",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'items' => [
        [
                'requestItemId' => '3f7c1e90-2a4b-4d61-9c0e-5b8f2d6a1e34',
                'fileId' => 'file_7bV1aLcs3Kf9dQ2mNpXwZ'
        ],
        [
                'requestItemId' => '3f7c1e90-2a4b-4d61-9c0e-5b8f2d6a1e34',
                'fileId' => 'file_9aB0xY4mNpXwZ7bV1aLdt'
        ],
        [
                'requestItemId' => '6b2d4a81-7c05-4e39-8f1a-2d9c3e7b5041',
                'answerText' => 'Salary from the user\'s employer, with payslips attached.'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

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

func main() {

	url := "https://production.hifi.com/v3/rfis/{rfiId}/submissions"

	payload := strings.NewReader("{\n  \"items\": [\n    {\n      \"requestItemId\": \"3f7c1e90-2a4b-4d61-9c0e-5b8f2d6a1e34\",\n      \"fileId\": \"file_7bV1aLcs3Kf9dQ2mNpXwZ\"\n    },\n    {\n      \"requestItemId\": \"3f7c1e90-2a4b-4d61-9c0e-5b8f2d6a1e34\",\n      \"fileId\": \"file_9aB0xY4mNpXwZ7bV1aLdt\"\n    },\n    {\n      \"requestItemId\": \"6b2d4a81-7c05-4e39-8f1a-2d9c3e7b5041\",\n      \"answerText\": \"Salary from the user's employer, with payslips attached.\"\n    }\n  ]\n}")

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

	req.Header.Add("Authorization", "Bearer <token>")
	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))

}

HttpResponse<String> response = Unirest.post("https://production.hifi.com/v3/rfis/{rfiId}/submissions")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"items\": [\n    {\n      \"requestItemId\": \"3f7c1e90-2a4b-4d61-9c0e-5b8f2d6a1e34\",\n      \"fileId\": \"file_7bV1aLcs3Kf9dQ2mNpXwZ\"\n    },\n    {\n      \"requestItemId\": \"3f7c1e90-2a4b-4d61-9c0e-5b8f2d6a1e34\",\n      \"fileId\": \"file_9aB0xY4mNpXwZ7bV1aLdt\"\n    },\n    {\n      \"requestItemId\": \"6b2d4a81-7c05-4e39-8f1a-2d9c3e7b5041\",\n      \"answerText\": \"Salary from the user's employer, with payslips attached.\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://production.hifi.com/v3/rfis/{rfiId}/submissions")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"items\": [\n    {\n      \"requestItemId\": \"3f7c1e90-2a4b-4d61-9c0e-5b8f2d6a1e34\",\n      \"fileId\": \"file_7bV1aLcs3Kf9dQ2mNpXwZ\"\n    },\n    {\n      \"requestItemId\": \"3f7c1e90-2a4b-4d61-9c0e-5b8f2d6a1e34\",\n      \"fileId\": \"file_9aB0xY4mNpXwZ7bV1aLdt\"\n    },\n    {\n      \"requestItemId\": \"6b2d4a81-7c05-4e39-8f1a-2d9c3e7b5041\",\n      \"answerText\": \"Salary from the user's employer, with payslips attached.\"\n    }\n  ]\n}"

response = http.request(request)
puts response.read_body

{
  "rfiId": "rfi_5Kf9dQ2mNpXwZ7bV1aLcs",
  "roundId": "rfir_2mNpXwZ7bV1aLcs3Kf9dQ",
  "round": 1,
  "status": "submitted",
  "submittedAt": "2026-07-03T09:12:44.000Z",
  "responseCount": 3
}

{
  "type": "VALIDATION_ERROR",
  "message": "One or more fields are invalid or missing.",
  "fields": [
    {
      "code": "invalid_value",
      "message": "Must be a valid email address",
      "field": "email"
    }
  ]
}

{
  "type": "UNAUTHORIZED",
  "message": "Authentication required"
}

{
  "type": "RESOURCE_NOT_FOUND",
  "message": "<string>",
  "fields": [
    {
      "code": "<string>",
      "message": "<string>",
      "field": "<string>"
    }
  ]
}

{
  "type": "RESOURCE_CONFLICT",
  "message": "Resource already exists or conflicts with current state"
}

{
  "type": "ACTION_NOT_ALLOWED",
  "message": "This action is not allowed"
}

{
  "type": "INTERNAL_SERVER_ERROR",
  "message": "An internal server error occurred"
}