hi i am using fedex api i have created the my account on fedex. my problem is that when i am using test account number and test meter number i am getting the results properly but when i am using client account detail i always get the error invalid header(invalid header). when i have contact with the fedex team they said me to use different url ( before asking with suport team i am using this url https://gatewaybeta.fedex.com/GatewayDC now they have asked me to use this url gateway.fedex.com:443/gatewayDC ) but still the same response
can one have any idea about this or have any api regarding fedex shiiping charge. I have to to find only shipping rate with this api