import { Client } from "@notionhq/client"

const notion = new Client()

const response = await notion.oauth.token({
  client_id: process.env.OAUTH_CLIENT_ID,
  client_secret: process.env.OAUTH_CLIENT_SECRET,
  grant_type: "authorization_code",
  code: "abc123-authorization-code",
  redirect_uri: "https://example.com/callback"
})

curl --request POST \
  --url https://api.notion.com/v1/oauth/token \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --header 'Notion-Version: <notion-version>' \
  --data '
{
  "grant_type": "<string>",
  "code": "<string>",
  "redirect_uri": "<string>"
}
'

import requests

url = "https://api.notion.com/v1/oauth/token"

payload = {
    "grant_type": "<string>",
    "code": "<string>",
    "redirect_uri": "<string>"
}
headers = {
    "Notion-Version": "<notion-version>",
    "Authorization": "Basic <encoded-value>",
    "Content-Type": "application/json"
}

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

print(response.text)

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.notion.com/v1/oauth/token",
  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([
    'grant_type' => '<string>',
    'code' => '<string>',
    'redirect_uri' => '<string>'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Basic <encoded-value>",
    "Content-Type: application/json",
    "Notion-Version: <notion-version>"
  ],
]);

$response = curl_exec($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://api.notion.com/v1/oauth/token"

	payload := strings.NewReader("{\n  \"grant_type\": \"<string>\",\n  \"code\": \"<string>\",\n  \"redirect_uri\": \"<string>\"\n}")

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

	req.Header.Add("Notion-Version", "<notion-version>")
	req.Header.Add("Authorization", "Basic <encoded-value>")
	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://api.notion.com/v1/oauth/token")
  .header("Notion-Version", "<notion-version>")
  .header("Authorization", "Basic <encoded-value>")
  .header("Content-Type", "application/json")
  .body("{\n  \"grant_type\": \"<string>\",\n  \"code\": \"<string>\",\n  \"redirect_uri\": \"<string>\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.notion.com/v1/oauth/token")

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

request = Net::HTTP::Post.new(url)
request["Notion-Version"] = '<notion-version>'
request["Authorization"] = 'Basic <encoded-value>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"grant_type\": \"<string>\",\n  \"code\": \"<string>\",\n  \"redirect_uri\": \"<string>\"\n}"

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

{
  "access_token": "<string>",
  "token_type": "<string>",
  "refresh_token": "<string>",
  "bot_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "workspace_icon": "<string>",
  "workspace_name": "<string>",
  "workspace_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "owner": {
    "type": "<string>",
    "user": {
      "type": "<string>",
      "person": {
        "email": "<string>",
        "email_verified": true
      },
      "name": "<string>",
      "avatar_url": "<string>",
      "id": "<string>",
      "object": "<string>"
    }
  },
  "duplicated_template_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "request_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
}

{
  "object": "<unknown>",
  "message": "<string>",
  "status": "<unknown>",
  "additional_data": {}
}

{
  "object": "<unknown>",
  "message": "<string>",
  "code": "invalid_client",
  "status": "<unknown>",
  "additional_data": {}
}

{
  "object": "<unknown>",
  "message": "<string>",
  "code": "test_env_error",
  "status": "<unknown>",
  "additional_data": {}
}

{
  "object": "<unknown>",
  "message": "<string>",
  "code": "internal_server_error",
  "status": "<unknown>",
  "additional_data": {}
}