curl --request POST \
  --url https://app.surferseo.com/api/v1/serp_analyzers/batch \
  --header 'API-KEY: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
[
  {
    "keyword": "SEO"
  },
  {
    "keyword": "SurferSEO"
  }
]
'

import requests

url = "https://app.surferseo.com/api/v1/serp_analyzers/batch"

payload = [{ "keyword": "SEO" }, { "keyword": "SurferSEO" }]
headers = {
    "API-KEY": "<api-key>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'API-KEY': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify([{keyword: 'SEO'}, {keyword: 'SurferSEO'}])
};

fetch('https://app.surferseo.com/api/v1/serp_analyzers/batch', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://app.surferseo.com/api/v1/serp_analyzers/batch",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    [
        'keyword' => 'SEO'
    ],
    [
        'keyword' => 'SurferSEO'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "API-KEY: <api-key>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

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

func main() {

	url := "https://app.surferseo.com/api/v1/serp_analyzers/batch"

	payload := strings.NewReader("[\n  {\n    \"keyword\": \"SEO\"\n  },\n  {\n    \"keyword\": \"SurferSEO\"\n  }\n]")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("API-KEY", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://app.surferseo.com/api/v1/serp_analyzers/batch")
  .header("API-KEY", "<api-key>")
  .header("Content-Type", "application/json")
  .body("[\n  {\n    \"keyword\": \"SEO\"\n  },\n  {\n    \"keyword\": \"SurferSEO\"\n  }\n]")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://app.surferseo.com/api/v1/serp_analyzers/batch")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["API-KEY"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "[\n  {\n    \"keyword\": \"SEO\"\n  },\n  {\n    \"keyword\": \"SurferSEO\"\n  }\n]"

response = http.request(request)
puts response.read_body

[
  {
    "id": 1,
    "state": "scheduled"
  },
  {
    "error": "quota_exceeded",
    "input": {
      "keyword": "SurferSEO"
    }
  }
]