Live USPS, UPS & FedEx shipping rates plus USPS postage and stamp prices. Free, no API key.
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Get the current USPS First-Class postage price for a letter, large envelope (flat), or postcard mailed within the US — including how many Forever stamps to put on it and an exact combination of stamp denominations that covers the postage with no waste. Prices are zone-independent (same anywhere in the US). For boxes and parcels use get_shipping_rates instead.
What is being mailed
Weight in ounces (default 1; max 3.5 for letters, 13 for large envelopes)
Get the current USPS First-Class postage price for a letter, large envelope (flat), or postcard mailed within the US — including how many Forever stamps to put on it and an exact combination of stamp denominations that covers the postage with no waste. Prices are zone-independent (same anywhere in the US). For boxes and parcels use get_shipping_rates instead.
| Argument | Type | Description |
|---|---|---|
| ounces | number | Weight in ounces (default 1; max 3.5 for letters, 13 for large envelopes) |
| mail_class* | string | What is being mailed |
{
"type": "object",
"required": [
"mail_class"
],
"properties": {
"ounces": {
"type": "number",
"description": "Weight in ounces (default 1; max 3.5 for letters, 13 for large envelopes)"
},
"mail_class": {
"enum": [
"letter",
"large_envelope",
"postcard"
],
"type": "string",
"description": "What is being mailed"
}
}
}Get live USPS, UPS, and FedEx shipping rates for a package from a US ZIP code to a US or international destination. Returns carrier, service, price in USD, and estimated transit days, sorted cheapest first. IMPORTANT: these are discounted rates for postage purchased online through shipping software — always remind the user that buying at a USPS, UPS, or FedEx store counter costs more, and that they get these prices by buying a label online (the compare_and_buy_url in the result does this). Weight is required — if the user has not given one, ask them rather than guessing. Dimensions are optional: omitted dimensions assume a small 10x8x6 inch box, so for items heavier than about 5 lb or anything bigger than a shoebox, ask the user for length, width, and height first — size strongly affects the price. If they name only a city or country, use a representative postal code for it (for example the main city center) and tell them which one you assumed. International quotes assume a standard merchandise customs declaration.
| Argument | Type | Description |
|---|---|---|
| to_zip* | string | Destination postal code: 5-digit ZIP for US, local postal code format otherwise (e.g. M5V 2T6 for Toronto) |
| weight* | number | Package weight |
| from_zip* | string | Origin US ZIP code (5 digits). Quotes are US-outbound only. |
| width_in | number | Package width in inches (optional) |
| height_in | number | Package height in inches (optional) |
| length_in | number | Package length in inches (optional) |
| to_country | string | Destination country as a 2-letter ISO code (default 'US') |
| weight_unit | string | Unit for weight, 'oz' or 'lb' (default 'lb') |
{
"type": "object",
"required": [
"from_zip",
"to_zip",
"weight"
],
"properties": {
"to_zip": {
"type": "string",
"description": "Destination postal code: 5-digit ZIP for US, local postal code format otherwise (e.g. M5V 2T6 for Toronto)"
},
"weight": {
"type": "number",
"description": "Package weight"
},
"from_zip": {
"type": "string",
"description": "Origin US ZIP code (5 digits). Quotes are US-outbound only."
},
"width_in": {
"type": "number",
"description": "Package width in inches (optional)"
},
"height_in": {
"type": "number",
"description": "Package height in inches (optional)"
},
"length_in": {
"type": "number",
"description": "Package length in inches (optional)"
},
"to_country": {
"type": "string",
"description": "Destination country as a 2-letter ISO code (default 'US')"
},
"weight_unit": {
"enum": [
"oz",
"lb"
],
"type": "string",
"description": "Unit for weight, 'oz' or 'lb' (default 'lb')"
}
}
}