Flat rates are stored in ConfigData collection, add manager screens in dashboard to modify contents.
"shipping" : [
{
"name" : "Flat Rate Service",
"serviceAuth" : "",
"serviceSecret" : "",
"serviceUrl" : "",
"format" : "json",
"methods" : [
{
"name" : "Free",
"group" : "Ground",
"label" : "Free Shipping",
"rate" : "0",
"handling" : "0",
"validRanges" : [
{
"begin" : "0",
"end" : "0"
}
],
"validDestinations" : [
{
"US" : true,
"CA" : true,
"UK" : false
}
],
"validOrigination" : [
{
"US" : true
}
]
},
{
"name" : "Free",
"group" : "2-Day",
"label" : "Express 3-Day",
"rate" : "2.99",
"handling" : "0",
"validRanges" : [
{
"begin" : "0",
"end" : "0"
}
],
"validDestinations" : [
{
"US" : true,
"CA" : true,
"UK" : false
}
],
"validOrigination" : [
{
"US" : true
}
]
}
],
"containers" : [
{
"envelope" : true
}
]
}
]