The SMS Works API

thesmsworks · Company

Company No Auth Free & Open messaging

The SMS Works provides a low-cost, reliable SMS API for developers. Pay only for delivered texts, all failed messages are refunded.

Authentication

No authentication requiredFree to use with no key needed.

Sample Requests

GET GET /credits/balance

Returns the number of credits currently available on the account

https://api.apis.guru/v2/specs/thesmsworks.co.uk/1.8.0/credits/balance

Hover any highlighted part to learn what it does

curl -X GET "https://api.apis.guru/v2/specs/thesmsworks.co.uk/1.8.0/credits/balance"

import requests
response = requests.get(
    "https://api.apis.guru/v2/specs/thesmsworks.co.uk/1.8.0/credits/balance",
)
print(response.json())

const url = 'https://api.apis.guru/v2/specs/thesmsworks.co.uk/1.8.0/credits/balance';

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

package main

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

func main() {
	targetURL := "https://api.apis.guru/v2/specs/thesmsworks.co.uk/1.8.0/credits/balance"
	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/thesmsworks.co.uk/1.8.0/credits/balance")

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/thesmsworks.co.uk/1.8.0/credits/balance";
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

GET GET /messages/schedule

Returns a list of messages scheduled from your account, comprising any messages scheduled in the last 3 months and any scheduled to send in the future

https://api.apis.guru/v2/specs/thesmsworks.co.uk/1.8.0/messages/schedule

Hover any highlighted part to learn what it does

curl -X GET "https://api.apis.guru/v2/specs/thesmsworks.co.uk/1.8.0/messages/schedule"

import requests
response = requests.get(
    "https://api.apis.guru/v2/specs/thesmsworks.co.uk/1.8.0/messages/schedule",
)
print(response.json())

const url = 'https://api.apis.guru/v2/specs/thesmsworks.co.uk/1.8.0/messages/schedule';

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

package main

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

func main() {
	targetURL := "https://api.apis.guru/v2/specs/thesmsworks.co.uk/1.8.0/messages/schedule"
	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/thesmsworks.co.uk/1.8.0/messages/schedule")

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/thesmsworks.co.uk/1.8.0/messages/schedule";
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

GET GET /utils/test

Returns the customer ID to the caller

https://api.apis.guru/v2/specs/thesmsworks.co.uk/1.8.0/utils/test

Hover any highlighted part to learn what it does

curl -X GET "https://api.apis.guru/v2/specs/thesmsworks.co.uk/1.8.0/utils/test"

import requests
response = requests.get(
    "https://api.apis.guru/v2/specs/thesmsworks.co.uk/1.8.0/utils/test",
)
print(response.json())

const url = 'https://api.apis.guru/v2/specs/thesmsworks.co.uk/1.8.0/utils/test';

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

package main

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

func main() {
	targetURL := "https://api.apis.guru/v2/specs/thesmsworks.co.uk/1.8.0/utils/test"
	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/thesmsworks.co.uk/1.8.0/utils/test")

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/thesmsworks.co.uk/1.8.0/utils/test";
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($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 The SMS Works API?

The SMS Works API is a Company API. Developers commonly use company APIs for:

enriching CRM records with company firmographics
building lead-generation and prospecting tools
verifying business identity and registration details
monitoring competitors and market intelligence
powering B2B data enrichment pipelines

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

New to APIs? Read our beginner's guide

Open documentation ↗