Facinf same issue of code 9501 with various endpoint

[neildave999]

base_url = "https://sandbox.api.visa.com/pav/v1/cardvalidation"

# request_body ={

# "systemsTraceAuditNumber": "743720",

# "cardCvv2Value": "999",

# "cardAcceptor": {

# "address": {

# "country": "USA",

# "zipCode": "94404",

# "city": "San Francisco",

# "state": "CA"

# },

# "idCode": "111111",

# "name": "Visa Inc",

# "terminalId": "12345678"

# },

# "acquirerCountryCode": "840",

# "primaryAccountNumber": "4957030420210454",

# "acquiringBin": "408999",

# "retrievalReferenceNumber": "015221743720",

# "cardExpiryDate": "2015-10",

# "addressVerificationResults": {

# "street": "801 Metro Center Blv",

# "postalCode": "94404"

# }

# }

r = requests.post(base_url,

# verify = ('DigiCertGlobalRootCA.crt'),

cert = ('cert.pem','key.pem'),

headers = headers,

auth = ('user', 'pass'),

data = request_body)

response is below

'{"responseStatus":{"code":"9501","severity":"ERROR","message":"Invalid input found, please correct the input data","info":"","status":"400"}}'

Am I making any mistake?