ZapSMTP / Docs / Received emailsResponse
List conversations
GET/v1/threads
List conversations (threads with at least one received email), the most recently active first: a helpdesk inbox.
Requires a full-access key.
Served from a per-conversation summary kept up to date as emails arrive: a page costs the same however much email you have.
A conversation you started (your first email) is counted once the customer answers it.
Query parameters
limitinteger- 1-100; out-of-range falls back to 20. Default
20. beforestring- Cursor: the
last_message_atof the last conversation you have (RFC 3339). Limits: 422 invalid_parameter otherwise. before_idstring- With before: the id of the last conversation you have, so conversations active at the same instant are neither skipped nor repeated.
awaiting_replybooleantrue: only conversations whose last human email came in.unreadbooleantrue: only conversations with an email received after their read mark.participantstring- Only conversations this address took part in (case-insensitive).
Errors
restricted_api_keyHTTP 403invalid_parameterHTTP 422- before must be an RFC 3339 time
curl 'https://zapsmtp.xyz/v1/threads?awaiting_reply=true' \
-H "Authorization: Bearer $ZAP_API_KEY"const res = await fetch('https://zapsmtp.xyz/v1/threads?awaiting_reply=true', {
method: 'GET',
headers: {
Authorization: `Bearer ${process.env.ZAP_API_KEY}`,
},
});
// 204 No Content (e.g. a delete) has no body
const data = res.status === 204 ? null : await res.json();
if (!res.ok) throw new Error(`${data.name}: ${data.message}`);
console.log(data);import os
import requests
res = requests.get(
"https://zapsmtp.xyz/v1/threads?awaiting_reply=true",
headers={"Authorization": f"Bearer {os.environ['ZAP_API_KEY']}"},
timeout=30,
)
res.raise_for_status()
print(res.json() if res.status_code != 204 else "deleted")<?php
$ch = curl_init('https://zapsmtp.xyz/v1/threads?awaiting_reply=true');
curl_setopt_array($ch, [
CURLOPT_CUSTOMREQUEST => 'GET',
CURLOPT_RETURNTRANSFER => true,
CURLOPT_HTTPHEADER => [
'Authorization: Bearer ' . getenv('ZAP_API_KEY'),
],
]);
$data = json_decode(curl_exec($ch), true);
$status = curl_getinfo($ch, CURLINFO_RESPONSE_CODE);
if ($status >= 400) {
throw new RuntimeException($data['message']);
}
print_r($data);package main
import (
"fmt"
"io"
"net/http"
"os"
)
func main() {
req, err := http.NewRequest(
"GET",
"https://zapsmtp.xyz/v1/threads?awaiting_reply=true",
nil,
)
if err != nil {
panic(err)
}
req.Header.Set("Authorization", "Bearer "+os.Getenv("ZAP_API_KEY"))
res, err := http.DefaultClient.Do(req)
if err != nil {
panic(err)
}
defer res.Body.Close()
out, _ := io.ReadAll(res.Body)
fmt.Println(res.Status, string(out))
}require 'net/http'
require 'json'
uri = URI('https://zapsmtp.xyz/v1/threads?awaiting_reply=true')
req = Net::HTTP::Get.new(uri)
req['Authorization'] = "Bearer #{ENV.fetch('ZAP_API_KEY')}"
res = Net::HTTP.start(uri.host, uri.port, use_ssl: true) { |http| http.request(req) }
puts res.code, (JSON.parse(res.body) unless res.body.to_s.empty?)import java.net.URI;
import java.net.http.*;
public class ZapRequest {
public static void main(String[] args) throws Exception {
var request = HttpRequest.newBuilder(URI.create("https://zapsmtp.xyz/v1/threads?awaiting_reply=true"))
.header("Authorization", "Bearer " + System.getenv("ZAP_API_KEY"))
.method("GET", HttpRequest.BodyPublishers.noBody())
.build();
var response = HttpClient.newHttpClient()
.send(request, HttpResponse.BodyHandlers.ofString());
System.out.println(response.statusCode() + " " + response.body());
}
}using System.Net.Http.Headers;
using System.Text;
using var http = new HttpClient();
var request = new HttpRequestMessage(HttpMethod.Get, "https://zapsmtp.xyz/v1/threads?awaiting_reply=true");
request.Headers.Authorization = new AuthenticationHeaderValue(
"Bearer", Environment.GetEnvironmentVariable("ZAP_API_KEY"));
var response = await http.SendAsync(request);
Console.WriteLine($"{(int)response.StatusCode} {await response.Content.ReadAsStringAsync()}");Set
ZAP_API_KEY in your environment.Response 200 OK
{
"object": "list",
"has_more": false,
"data": [
{
"object": "thread",
"id": "3f1c9a52-6b0e-5d4f-8a71-2c9e0b4d6f13",
"subject": "Where is my order?",
"participants": [
"jane@example.org",
"support@acme.com"
],
"message_count": 3,
"inbound_count": 2,
"outbound_count": 1,
"has_attachments": false,
"first_message_at": "2026-10-21T15:10:02.904Z",
"last_message_at": "2026-10-21T16:02:13.540Z",
"last_inbound_at": "2026-10-21T16:02:13.540Z",
"last_message": {
"id": "019a1f52-0c1d-7f2e-8a3b-4c5d6e7f8091",
"direction": "inbound",
"from": "jane@example.org",
"subject": "Re: Where is my order?"
},
"awaiting_reply": true,
"unread": true,
"read_at": null,
"metadata": {
"ticket": "T-1042"
}
}
]
}