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Open Buy API Reference

The Open Buy API is designed to provide a faster, standard, and secure interface for searching and purchasing items in real-time for all suppliers.

Introduction

The Open Buy API is designed to provide a faster, standard,url and secure interface for searching and purchasing items in real-time for all suppliers. It is designed to be simple and follows the common patterns that most eCommerce APIs provide.

The four core concepts in the Open Buy API include:

Authentication
Search
Detail
Checkout

For information on how the Open Buy API affects customers and buyers, see Open Buy API for Buyers.

Download our Open Buy schema file for use in Postman or another OpenAPI 3.0 compatible tool, or view the schema file directly in an online viewer like ReDoc.

For help working with the API, contact the Open Buy support team: openbuy-support@coupa.com.

After finishing your API development, feel free to email us your documentation (at openbuy-support@coupa.com) and we will share it with customers to help them get started. Otherwise, please fill out this short form, email it to us at the address above, and we will create brief documentation for customers.

Authentication methods

The Open Buy API may be authenticated through:

Username and password (similar to cXML identity/secret pair)
OAuth

Actions

The Open Buy API allows you to:

API	Verb	Path	Action	Description
Authentication	POST	`/authentication/v1.0.0`	authenticate	Authentication with supplier site
Search	POST	`/search/v1.0.0`	search	Retrieve item data based on a search query
Detail	POST	`/detail/v1.0.0`	detail	Retrieve item data for a specific item for detailed review
Checkout	POST	`/checkout/v1.0.0`	checkout	Retrieve item data for purchase

Authentication

API	Verb	Path	Action	Description
Authentication	POST	`/authentication/v1.0.0`	authenticate	Authentication with supplier site

Example authentication request

{
	"credentials": "423j23j2j334l4s04",
	"email": "email@coupa.com"
}

Responses

Code	Description
200	Token successfully retrieved `{ "token": "Bearer ABC12345" }`
400	Invalid request parameters; we were unable to attempt retrieval.
401	Unauthorized
500	Service error during request. Please retry after sometime

Search

API	Verb	Path	Action	Description
Search	POST	`/search/v1.0.0`	search	Retrieve item data based on a search query

Parameters

Element	Description	Required Field?	Unique?	Allowable Value	Data Type
query	The search query	yes	no	any	string
page_number	Page number for results	no	no	any	number

Responses

Code	Description
200	Search results successfully retrieved `{ "count": 123, "total_count": 10000, "results": [ { "source_part_num": 12345, "title": "Leather Gloves - XL", "thumbnail": "https://localhost/image", "price": 100, "currency": "USD", "uom": "EA" } ] }`
400	Invalid request parameters; we were unable to attempt retrieval.
401	Unauthorized
500	Service error during request. Please retry after sometime

Detail

API	Verb	Path	Action	Description
Detail	POST	`/detail/v1.0.0`	detail	Retrieve item data for a specific item for detailed review

Parameters

Element	Description	Required Field?	Unique?	Allowable Value	Data Type
item_id	The unique item ID	yes	no	any	string

Responses

Code	Description
200	Item successfully retrieved `{ "source_part_num": 12345, "title": "Leather Gloves - XL", "image": "https://localhost/image", "price": 100, "currency": "USD", "uom": "EA" }`
400	Invalid request parameters; we were unable to attempt retrieval.
401	Unauthorized
500	Service error during request. Please retry after sometime

Checkout

API	Verb	Path	Action	Description
Checkout	POST	`/checkout/v1.0.0`	checkout	Retrieve item data for purchase

Parameters

Element	Description	Required Field?	Unique?	Allowable Value	Data Type
item_id	The unique item ID	yes	yes	any	string
quantity	Quantity	no	no	any	string

Responses

Code	Description
200	Item successfully retrieved `{ "source_part_num": 12345, "title": "Leather Gloves - XL", "image": "https://localhost/image", "price": 100, "currency": "USD", "uom": "EA" }`
400	Invalid request parameters; we were unable to attempt retrieval.
401	Unauthorized
500	Service error during request. Please retry after sometime

Open Buy API schema

Authentication Request

The credentials and email to retrieve an access token.

Element	Description	Required Field?	Data Type
credentials	Supplier-specific string to authorize the session. Examples include a refresh token, user and password, or an authorization key.	no	string
email	Email of user	no	string

Authentication Result

The result of a request for authentication

Element	Description	Required Field?	Data Type
token	The bearer token	no	string

Extra Item Details

Name value pairs

Element	Description	Required Field?	Data Type
name	Name	no	string
value	Value	no	string

Search Results

The result of a search request

Element	Description	Required Field?	Data Type
count	Count of search	yes	integer
total_count	Approximate total number in catalog	no	integer
results	Results	no	Item Result (see table below)

Item Result

Thee result of a request for item data

Element	Description	Required Field?	Data Type
item_id	Unique item id	no	string
source_part_num	The supplier part number	no	string
title	string The title of the item	no	string
type	string Item Type (item, group). Group represents a parent of purchasable items.	no	string
image	A URL to the item image	no	string
thumbnail	Thumbnail of product	no	string
price	Price	no	number
currency	Currency	no	string
listPrice	List price	no	number
uom	Price	no	string
summary	Detail description about the item	no	string
manufacturer_name	Manufacturer name	no	string
manufacturer_part_num	Manufacturer part number	no	string
source_part_auxiliary_id	Supplier aux part number	no	string
unspsc	UNSPSC	no	string
leadtime	Lead time	no	string
min_order_quantity	Minimal order quantity	no	number
max_order_quantity	Max order quantity	no	number
order_increment_quantity	Order increment number	no	number
quantity	Quantity for checkout	no	number
tableDetails	Columns to display if shown in a table	no	string
details	Details	no	Extra Item Details (see table above)
detaillinks	Detail Links	no	Extra Item Details (see table above)
detailimages	Detail Images	no	Extra Item Details (see table above)