API authentication tutorial and examples with source code

Learn how to use API authentication in your software in a tutorial with examples with source code

API authentication is required to use the services provided by any Application Program Interface to interconnect systems.

Learn how to authenticate with API.

API in Headers

API Key in headers
You can also pass the API key in the headers of your request.
This is a more secure way to authenticate your requests.
The API key must be included in the X-API-Key header of the request.
Headers:
X-API-Key (string): Your API key for authentication.
This header is required for accessing the endpoint.
Request Example:
shell : curl https://tecni.com/tech/api/api-integration.json --header "x-api-key: YOUR_API_KEY"

Auth in javascript

const options = {
  method: 'POST',
  headers: {
    accept: 'application/json',
    'Content-Type': 'application/x-www-form-urlencoded'
  },
  body: new URLSearchParams({grant_type: 'client_credentials'})
};

fetch('https://tecni.com/tech/api-person-search.php', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

Authentication

Authentication example
post https://tecni.com/tech/api-person-search.php
Use your api_id and api_key as your username and password to get your access token.
Log in to see full request history
time status user agent
Make a request to see history.
Use this request you to obtain an access token and use it to access to the verification process scope.
❗️ Username and Password Use api_id as your username, and api_key as your password.
Both the api_id and api_key are available through your dashboard under "Integration". The following is an example call that hashes your api_id and api_key in the authorization header

Shell

 
($(echo -en ':' | base64)).
curl 
--location 
--request POST 'https://tecni.com/tech/api-person-search.php' \
  -H 'Content-Type: application/x-www-form-urlencoded' \
  -H "Authorization: Basic \
    $(echo -en ':' | base64)" \
  -d 'grant_type=client_credentials'

JAVASCRIPT

	 
const options = {
  method: 'POST',
  headers: {
    accept: 'application/json',
    'Content-Type': 'application/x-www-form-urlencoded'
  },
  body: new URLSearchParams({grant_type: 'client_credentials'})
};
fetch('https://tecni.com/tech/api-person-search.php', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

JSON

 
{
  "grant_type": "client_credentials"
}

SHELL

	   
curl --request POST \
     --url https://tecni.com/tech/api-person-search.php \
     --header 'Content-Type: application/x-www-form-urlencoded' \
     --header 'accept: application/json' \
     --data grant_type=client_credentials

PYTHON

		 
import requests
url = "https://tecni.com/tech/api-person-search.php"
payload = { "grant_type": "client_credentials" }
headers = {
    "accept": "application/json",
    "Content-Type": "application/x-www-form-urlencoded"
}
response = requests.post(url, data=payload, headers=headers)
print(response.text)

NODE.JS

	
import mati from '@api/mati';
mati.authentication({grant_type: 'client_credentials'})
  .then(({ data }) => console.log(data))
  .catch(err => console.error(err));

PHP

 
require_once('vendor/autoload.php');
$client = new \GuzzleHttp\Client();
$response = $client->request('POST', 'https://tecni.com/tech/api-person-search.php', [
  'form_params' => [
    'grant_type' => 'client_credentials'
  ],
  'headers' => [
    'Content-Type' => 'application/x-www-form-urlencoded',
    'accept' => 'application/json',
  ],
]);
echo $response->getBody();

C#

	  
using RestSharp;
var options = new RestClientOptions("https://tecni.com/tech/api-person-search.php");
var client = new RestClient(options);
var request = new RestRequest("");
request.AddHeader("accept", "application/json");
request.AddParameter("grant_type", "client_credentials");
var response = await client.PostAsync(request);
Console.WriteLine("{0}", response.Content);

C++

	  
CURL *hnd = curl_easy_init();
curl_easy_setopt(hnd, CURLOPT_CUSTOMREQUEST, "POST");
curl_easy_setopt(hnd, CURLOPT_WRITEDATA, stdout);
curl_easy_setopt(hnd, CURLOPT_URL, "https://tecni.com/tech/api-person-search.php");
struct curl_slist *headers = NULL;
headers = curl_slist_append(headers, "accept: application/json");
headers = curl_slist_append(headers, "Content-Type: application/x-www-form-urlencoded");
curl_easy_setopt(hnd, CURLOPT_HTTPHEADER, headers);
curl_easy_setopt(hnd, CURLOPT_POSTFIELDS, "grant_type=client_credentials");
CURLcode ret = curl_easy_perform(hnd);

RUBY

	  
require 'uri'
require 'net/http'
url = URI("https://tecni.com/tech/api-person-search.php")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["accept"] = 'application/json'
request["Content-Type"] = 'application/x-www-form-urlencoded'
request.body = "grant_type=client_credentials"
response = http.request(request)
puts response.read_body

API Authentication

API Authentication