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Webhooks: Format Data for Success

Ensure that the data is formatted correctly in your JSON files

Written by Dan Coleman

Updated at December 13th, 2025

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In This Article

Format Specific Content Shipping Carrier, Service, and Package Type

Format Specific Content

We want to help you ensure that the information sent to Postsale is formatted for success. While Postsale gives you the ability to add and update order information from your sales channel or custom order source using webhooks, some of the information contained in the JSON file sent to Postsale must be formatted in a certain way. If the values are incorrect, Postsale will notify you of which values need to be corrected and the data contained in the JSON file will not be imported.

Adding Webhooks is a premium feature requiring the Soar billing plan. Learn more about managing your Postsale account in our Frequently Asked Questions.

In this article, we look at what values are valid and how the values must be formatted. 

Shipping Carrier, Service, and Package Type

All shipping carrier names, shipping services, and package types must be lowercase. The following tables list the valid values and the correct formatting.

Table: Carrier, Service, Package Type Format

CARRIER 

SERVICE 

PACKAGE TYPE 

usps 

usps_ground_advantage 

parcel 

 

usps_priority_mail 

soft_pack 

usps_priority_mail_express 

padded_flat_rate_envelope 

usps_first_class_international 

legal_flat_rate_envelope 

usps_priority_mail_international 

flat_rate_envelope 

usps_priority_mail_express_international 

small_flat_rate_box 

 

medium_flat_rate_box 

large_flat_rate_box 

CARRIER 

SERVICE 

PACKAGE TYPE 

ups 

ups_next_day_air 

parcel 

 

ups_2nd_day_air 

letter 

ups_2nd_day_air_am 

tube 

ups_ground 

pak 

ups_3_day_select 

express_box 

ups_next_day_air_saver 

ups_25kg_box 

ups_next_day_air_early 

ups_10kg_box 

ups_worldwide_express 

pallet 

ups_worldwide_expedited 

small_express_box 

ups_standard 

medium_express_box 

ups_worldwide_express_plus 

large_express_box 

ups_saver 

 

CARRIER 

SERVICE 

PACKAGE TYPE 

fedex 

fedex_ground 

parcel 

 

fedex_home_delivery 

fedex_envelope 

fedex_first_overnight 

fedex_box 

fedex_priority_overnight 

fedex_small_box 

fedex_standard_overnight 

fedex_medium_box 

fedex_2day_am 

fedex_large_box 

fedex_2day 

fedex_extra_large_box 

fedex_express_saver 

fedex_10kg_box 

fedex_economy 

fedex_25kb_box 

fedex_ground_economy 

fedex_tube 

fedex_ground_economy_bound_printed_matter 

fedex_pak 

fedex_ground_economy_media_mail 

 

fedex_ground_economy_returns 

fedex_ground_economy_under1lb 

fedex_international_ground 

fedex_international_priority_express 

fedex_international_first 

fedex_international_priority 

fedex_international_economy 

fedex_international_priority_directdistribution 

fedex_international_economy_directdistribution_service 

fedex_international_connect_plus 

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