paypal sandbox 500

paypalsandbox_500.py

def auth1():
    headers = {'X-PAYPAL-SECURITY-USERID':PAYPAL_API_USERNAME,'X-PAYPAL-SECURITY-PASSWORD':PAYPAL_API_PASSWORD,'X-PAYPAL-SECURITY-SIGNATURE':PAYPAL_API_SIGNATURE,'X-PAYPAL-APPLICATION-ID':'APP-80W284485P519543T','X-PAYPAL-REQUEST-DATA-FORMAT':'NV','X-PAYPAL-RESPONSE-DATA-FORMAT':'JSON'}
    url = 'https://svcs.sandbox.paypal.com/Permissions/RequestPermissions'
    payload="requestEnvelope.errorLanguage=en_US&scope=EXPRESS_CHECKOUT&callback=http://simplerelevance.com"
    resp = requests.post(url,headers=headers,data=payload,config=m)
    print resp.content
    print resp.status_code

ok, it should be RequestPermissions, so at least that part worked. My API credentials are still failing tho.
Also, 500 means server error, ya know? can you please throw a 404 if I get a complicated url wrong?

OK, finding more problems. Fixed the underscores in the header. Now I'm getting a 500000 error!

and... got it - step 1 is fixed. so finicky!