Mailsquad

inboxroute · Communication

Communication No Auth Free & Open email marketing

MailSquad offers an affordable and super easy way to create, send and track delightful emails.

Authentication

No authentication requiredFree to use with no key needed.

Sample Requests

GET GET /contacts

Get a paged result of contacts from a list

https://api.apis.guru/v2/specs/inboxroute.com/0.9/contacts?sort=desc&limit=10&listid=example&offset=0

Hover any highlighted part to learn what it does

curl -X GET "https://api.apis.guru/v2/specs/inboxroute.com/0.9/contacts?sort=desc&limit=10&listid=example&offset=0"

import requests
params = {
    "sort": "desc",
    "limit": "10",
    "listid": "example",
    "offset": "0"
}
response = requests.get(
    "https://api.apis.guru/v2/specs/inboxroute.com/0.9/contacts",
    params=params,
)
print(response.json())

const url = new URL('https://api.apis.guru/v2/specs/inboxroute.com/0.9/contacts');
url.searchParams.set('sort', 'desc');
url.searchParams.set('limit', '10');
url.searchParams.set('listid', 'example');
url.searchParams.set('offset', '0');

const response = await fetch(url); 
const data = await response.json();
console.log(data);

package main

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

func main() {
	baseURL, _ := url.Parse("https://api.apis.guru/v2/specs/inboxroute.com/0.9/contacts")
	q := baseURL.Query()
	q.Set("sort", "desc")
	q.Set("limit", "10")
	q.Set("listid", "example")
	q.Set("offset", "0")
	baseURL.RawQuery = q.Encode()
	targetURL := baseURL.String()
	req, _ := http.NewRequest("GET", targetURL, nil)

	client := &http.Client{}
	resp, _ := client.Do(req)
	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)
	fmt.Println(string(body))
}

require "net/http"
require "json"

uri = URI("https://api.apis.guru/v2/specs/inboxroute.com/0.9/contacts")
uri.query = URI.encode_www_form({
  "sort" => "desc",
  "limit" => "10",
  "listid" => "example",
  "offset" => "0"
})

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = uri.scheme == "https"

req = Net::HTTP::Get.new(uri)

res = http.request(req)
puts JSON.parse(res.body)

<?php
$url = "https://api.apis.guru/v2/specs/inboxroute.com/0.9/contacts?" . http_build_query([
    "sort" => "desc",
    "limit" => "10",
    "listid" => "example",
    "offset" => "0"
]);
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

GET GET /contacts/lists

Get a paged result of contact lists.

https://api.apis.guru/v2/specs/inboxroute.com/0.9/contacts/lists?sort=desc&limit=10&offset=0

Hover any highlighted part to learn what it does

curl -X GET "https://api.apis.guru/v2/specs/inboxroute.com/0.9/contacts/lists?sort=desc&limit=10&offset=0"

import requests
params = {
    "sort": "desc",
    "limit": "10",
    "offset": "0"
}
response = requests.get(
    "https://api.apis.guru/v2/specs/inboxroute.com/0.9/contacts/lists",
    params=params,
)
print(response.json())

const url = new URL('https://api.apis.guru/v2/specs/inboxroute.com/0.9/contacts/lists');
url.searchParams.set('sort', 'desc');
url.searchParams.set('limit', '10');
url.searchParams.set('offset', '0');

const response = await fetch(url); 
const data = await response.json();
console.log(data);

package main

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

func main() {
	baseURL, _ := url.Parse("https://api.apis.guru/v2/specs/inboxroute.com/0.9/contacts/lists")
	q := baseURL.Query()
	q.Set("sort", "desc")
	q.Set("limit", "10")
	q.Set("offset", "0")
	baseURL.RawQuery = q.Encode()
	targetURL := baseURL.String()
	req, _ := http.NewRequest("GET", targetURL, nil)

	client := &http.Client{}
	resp, _ := client.Do(req)
	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)
	fmt.Println(string(body))
}

require "net/http"
require "json"

uri = URI("https://api.apis.guru/v2/specs/inboxroute.com/0.9/contacts/lists")
uri.query = URI.encode_www_form({
  "sort" => "desc",
  "limit" => "10",
  "offset" => "0"
})

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = uri.scheme == "https"

req = Net::HTTP::Get.new(uri)

res = http.request(req)
puts JSON.parse(res.body)

<?php
$url = "https://api.apis.guru/v2/specs/inboxroute.com/0.9/contacts/lists?" . http_build_query([
    "sort" => "desc",
    "limit" => "10",
    "offset" => "0"
]);
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

POST POST /contacts/lists

Add a new contact list

https://api.apis.guru/v2/specs/inboxroute.com/0.9/contacts/lists

Hover any highlighted part to learn what it does

curl -X POST "https://api.apis.guru/v2/specs/inboxroute.com/0.9/contacts/lists"

import requests
response = requests.post(
    "https://api.apis.guru/v2/specs/inboxroute.com/0.9/contacts/lists",
)
print(response.json())

const url = 'https://api.apis.guru/v2/specs/inboxroute.com/0.9/contacts/lists';

const response = await fetch(url, {
  method: 'POST',
}); 
const data = await response.json();
console.log(data);

package main

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

func main() {
	targetURL := "https://api.apis.guru/v2/specs/inboxroute.com/0.9/contacts/lists"
	req, _ := http.NewRequest("POST", targetURL, nil)

	client := &http.Client{}
	resp, _ := client.Do(req)
	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)
	fmt.Println(string(body))
}

require "net/http"
require "json"

uri = URI("https://api.apis.guru/v2/specs/inboxroute.com/0.9/contacts/lists")

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = uri.scheme == "https"

req = Net::HTTP::Post.new(uri)

res = http.request(req)
puts JSON.parse(res.body)

<?php
$url = "https://api.apis.guru/v2/specs/inboxroute.com/0.9/contacts/lists";
$opts = ["http" => [
    "method" => "POST",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

Postman Setup Guide

Get Postman ↗

See official documentation for authentication and setup.

What can you build with Mailsquad?

Mailsquad is a Communication API. Developers commonly use communication APIs for:

sending SMS alerts and notifications
building in-app chat and messaging features
automating email sequences and transactional emails
creating voice bots and IVR systems
verifying phone numbers at signup

No authentication required. This API is open — no signup or key needed. Ideal for quick prototypes and public-facing features. Mailsquad is free to use, making it a low-risk choice to experiment with.

New to APIs? Read our beginner's guide

Open documentation ↗