curl --request GET \
  --url https://api.reply.io/v3/custom-fields/{id} \
  --header 'Authorization: Bearer <token>'

import requests

url = "https://api.reply.io/v3/custom-fields/{id}"

headers = {"Authorization": "Bearer <token>"}

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

print(response.text)

const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

fetch('https://api.reply.io/v3/custom-fields/{id}', 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://api.reply.io/v3/custom-fields/{id}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>"
  ],
]);

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

curl_close($curl);

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

package main

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

func main() {

	url := "https://api.reply.io/v3/custom-fields/{id}"

	req, _ := http.NewRequest("GET", url, nil)

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

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.get("https://api.reply.io/v3/custom-fields/{id}")
  .header("Authorization", "Bearer <token>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.reply.io/v3/custom-fields/{id}")

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

request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'

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

{
  "id": 123,
  "title": "<string>",
  "fieldType": "text",
  "metadata": "<string>",
  "orgWide": true,
  "fieldSource": "regular",
  "aiDefinition": {
    "promptText": "Summarize what {{Company}} does in one sentence",
    "variableKeys": [
      "Company"
    ],
    "createdAt": "2026-09-15T12:00:00Z",
    "updatedAt": "2026-09-15T12:30:00Z"
  },
  "promptActions": [
    {
      "promptActionId": 12,
      "promptActionName": "Qualify inbound"
    }
  ]
}

{
  "title": "Validation failed",
  "status": 400,
  "detail": "The request contains validation errors.",
  "errors": [
    {
      "pointer": "id",
      "detail": "The field id must be between 1 and 2147483647."
    }
  ]
}

{
  "title": "Unauthorized",
  "status": 401,
  "detail": "Authentication credentials are missing or invalid."
}

{
  "title": "Forbidden",
  "status": 403,
  "detail": "Feature scopes [ViewCustomField] are denied for userId 123",
  "code": "customField.forbidden"
}

{
  "title": "Not Found",
  "status": 404,
  "detail": "Custom field with ID 42 not found",
  "code": "customField.notFound"
}

{
  "title": "Too Many Requests",
  "status": 429,
  "detail": "API calls quota exceeded! maximum admitted 100 per 1m."
}