I sent a curl GET request using temporary development API token but did not work

I sent a curl GET request using temporary development API token but did not work

Hi
I gave this

curl https://sign.zoho.com/api/v1/fieldtypes -H "Authorization:Zoho-oauthtoken xxxxxx"

The response was:

{"code":9041,"message":"Invalid Oauth token","status":"failure"}

The token was the development temporary oauth token (given well within the 1 hour window)

How come it gave an error?