https://developers.kakao.com/docs/latest/ko/kakaologin/rest-api

인가(Authentication) → 인증 코드 받기 → 적절한 Endpoint 선택 → 파라미터에 값 넣고 Request → Response 받기

STEP 1. 인가

• Request

  curl -v -X POST "<https://kauth.kakao.com/oauth/token>" \\
      -H "Content-Type: application/x-www-form-urlencoded;charset=utf-8" \\
      -d "grant_type=authorization_code" \\
      -d "client_id=${REST_API_KEY}" \\
      --data-urlencode "redirect_uri=${REDIRECT_URI}" \\
      -d "code=${AUTHORIZE_CODE}"
  

• Response

  HTTP/1.1 200
  {
      "token_type": "bearer",
      "access_token": "${ACCESS_TOKEN}",
      "id_token": "${ID_TOKEN}",
      "expires_in": 7199,
      "refresh_token": "${REFRESH_TOKEN}",
      "refresh_token_expires_in": 86399,
      "scope": "profile_image openid profile_nickname"
  }
  

https://laburity.com/api-penetration-testing-101-a-beginners-guide-to-securing-apis/