# Google Recaptcha missing-input-secret

> How to fix the Google reCAPTCHA missing-input-secret error by sending the secret and response as URL parameters with URLSearchParams instead of a JSON body.

Author: [Flavio Copes](https://flaviocopes.com/about/) | Published: 2023-11-18 | Topics: [JavaScript](https://flaviocopes.com/tags/js/) | Canonical: https://flaviocopes.com/google-recaptcha-missing-input-secret/

Was trying to make Google Recaptcha work but kept getting failed attempts and the error `missing-input-secret` back.

After checking 100 times that my secret key was correct, I realized they want URL parameters in the POST request to validate the captcha value.

I was sending the values in the body:

```javascript
const response = await fetch('https://www.google.com/recaptcha/api/siteverify', {
  method: "POST",
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    secret: CAPTCHA_SITE_SECRET,
    response: CAPTCHA_VALUE_FROM_CLIENT
  })
})
```

Instead, this worked:

```javascript
const response = await fetch('https://www.google.com/recaptcha/api/siteverify?' 
	+ new URLSearchParams({
    secret: CAPTCHA_SITE_SECRET,
    response: CAPTCHA_VALUE_FROM_CLIENT
  }), {
  method: "POST",
})
```