get https://www.formstack.com/api/v2/oauth2/authorize
Users will be sent to this URL to authorize your application. Once authorized, the user will be redirected to redirect_uri with a url encoded authorization code that will be required in the token endpoint
Request an OAuth2 authorization code
GET /api/v2/oauth2/authorize?client_id=1234&redirect_uri=http%3A%2F%2Fwww.example.com&response_type=code HTTP/1.1
Host: www.formstack.com
curl -i "https://www.formstack.com/api/v2/oauth2/authorize?client_id=1234&redirect_uri=http%3A%2F%2Fwww.example.com&response_type=code"
To request an OAuth2 token to use with the Formstack API explorer, visit here.