Voice API

nexmo · Company

Company No Auth Free & Open API

The Voice API lets you create outbound calls, control in-progress calls and get information about historical calls. More information about the Voice API can be found at .

Authentication

No authentication requiredFree to use with no key needed.

Sample Requests

GET Get details of your calls

Get details of your calls

https://api.apis.guru/v2/specs/nexmo.com/voice/1.3.10?order=asc&status=started&date_end=2016-11-14T07:45:14Z&page_size=10&date_start=2016-11-14T07:45:14Z&record_index=0&conversation_uuid=example

Hover any highlighted part to learn what it does

curl -X GET "https://api.apis.guru/v2/specs/nexmo.com/voice/1.3.10/?order=asc&status=started&date_end=2016-11-14T07%3A45%3A14Z&page_size=10&date_start=2016-11-14T07%3A45%3A14Z&record_index=0&conversation_uuid=example"

import requests
params = {
    "order": "asc",
    "status": "started",
    "date_end": "2016-11-14T07:45:14Z",
    "page_size": "10",
    "date_start": "2016-11-14T07:45:14Z",
    "record_index": "0",
    "conversation_uuid": "example"
}
response = requests.get(
    "https://api.apis.guru/v2/specs/nexmo.com/voice/1.3.10/",
    params=params,
)
print(response.json())

const url = new URL('https://api.apis.guru/v2/specs/nexmo.com/voice/1.3.10/');
url.searchParams.set('order', 'asc');
url.searchParams.set('status', 'started');
url.searchParams.set('date_end', '2016-11-14T07:45:14Z');
url.searchParams.set('page_size', '10');
url.searchParams.set('date_start', '2016-11-14T07:45:14Z');
url.searchParams.set('record_index', '0');
url.searchParams.set('conversation_uuid', 'example');

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/nexmo.com/voice/1.3.10/")
	q := baseURL.Query()
	q.Set("order", "asc")
	q.Set("status", "started")
	q.Set("date_end", "2016-11-14T07:45:14Z")
	q.Set("page_size", "10")
	q.Set("date_start", "2016-11-14T07:45:14Z")
	q.Set("record_index", "0")
	q.Set("conversation_uuid", "example")
	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/nexmo.com/voice/1.3.10/")
uri.query = URI.encode_www_form({
  "order" => "asc",
  "status" => "started",
  "date_end" => "2016-11-14T07:45:14Z",
  "page_size" => "10",
  "date_start" => "2016-11-14T07:45:14Z",
  "record_index" => "0",
  "conversation_uuid" => "example"
})

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/nexmo.com/voice/1.3.10/?" . http_build_query([
    "order" => "asc",
    "status" => "started",
    "date_end" => "2016-11-14T07:45:14Z",
    "page_size" => "10",
    "date_start" => "2016-11-14T07:45:14Z",
    "record_index" => "0",
    "conversation_uuid" => "example"
]);
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

GET Get detail of a specific call

Get detail of a specific call

https://api.apis.guru/v2/specs/nexmo.com/voice/1.3.10/{uuid}

Hover any highlighted part to learn what it does

curl -X GET "https://api.apis.guru/v2/specs/nexmo.com/voice/1.3.10/{uuid}"

import requests
response = requests.get(
    "https://api.apis.guru/v2/specs/nexmo.com/voice/1.3.10/{uuid}",
)
print(response.json())

const url = 'https://api.apis.guru/v2/specs/nexmo.com/voice/1.3.10/{uuid}';

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/nexmo.com/voice/1.3.10/{uuid}"
	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/nexmo.com/voice/1.3.10/{uuid}")

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/nexmo.com/voice/1.3.10/{uuid}";
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

POST Create an outbound call

Create an outbound Call

https://api.apis.guru/v2/specs/nexmo.com/voice/1.3.10

Hover any highlighted part to learn what it does

curl -X POST "https://api.apis.guru/v2/specs/nexmo.com/voice/1.3.10/"

import requests
response = requests.post(
    "https://api.apis.guru/v2/specs/nexmo.com/voice/1.3.10/",
)
print(response.json())

const url = 'https://api.apis.guru/v2/specs/nexmo.com/voice/1.3.10/';

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/nexmo.com/voice/1.3.10/"
	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/nexmo.com/voice/1.3.10/")

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/nexmo.com/voice/1.3.10/";
$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 Voice API?

Voice 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. Voice API is free to use, making it a low-risk choice to experiment with.

New to APIs? Read our beginner's guide

Open documentation ↗