# Coupa Open Buy API

**Canonical:** https://apis.io/apis/coupa/coupa-open-buy-api/  
**Provider:** Coupa — https://apis.io/providers/coupa/  
**Base URL:** https://instance.coupahost.com  
**Documentation:** https://compass.coupa.com/en-us/products/product-documentation/supplier-resources/for-suppliers/integration-resources/open-buy-api-reference

Coupa Open Buy API is one of 16 APIs that [Coupa](https://apis.io/providers/coupa/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Catalog, E-Commerce, Open Buy, REST, and Search. The published artifact set on APIs.io includes API documentation and a support channel.

The Open Buy API provides a faster, standard, and secure interface for searching and purchasing items in real-time. It follows common eCommerce API patterns and supports authentication, search, detail, and checkout operations for all suppliers.

## Machine-readable artifacts (3)

- **Documentation** — https://compass.coupa.com/en-us/products/product-documentation/supplier-resources/for-suppliers/integration-resources/open-buy-api-reference
- **SupplierIntegrationResources** — https://compass.coupa.com/en-us/products/product-documentation/supplier-resources/for-suppliers/integration-resources
- **Support** — https://raw.githubusercontent.com/api-evangelist/coupa/refs/heads/main/mailto:openbuy-support@coupa.com

## Other Coupa APIs (12)

- [Coupa Integration API](https://apis.io/apis/coupa/coupa-integration-api/)
- [Coupa Supplier API](https://apis.io/apis/coupa/coupa-supplier-api/)
- [Coupa Analytics API](https://apis.io/apis/coupa/coupa-analytics-api/)
- [Coupa CCW API](https://apis.io/apis/coupa/coupa-ccw-api/)
- [Coupa CSO API](https://apis.io/apis/coupa/coupa-cso-api/)
- [Coupa Treasury API](https://apis.io/apis/coupa/coupa-treasury-api/)
- [Coupa Payments API](https://apis.io/apis/coupa/coupa-payments-api/)
- [Coupa Procurement API](https://apis.io/apis/coupa/coupa-procurement-api/)
- [Coupa Invoicing API](https://apis.io/apis/coupa/coupa-invoicing-api/)
- [Coupa Expenses API](https://apis.io/apis/coupa/coupa-expenses-api/)
- [Coupa Inventory and Receipts API](https://apis.io/apis/coupa/coupa-inventory-and-receipts-api/)
- [Coupa Invoices API](https://apis.io/apis/coupa/coupa-invoices-api/)

## Tags

Catalog, E-Commerce, Open Buy, REST, Search, Suppliers

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/coupa/coupa-open-buy-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/coupa/.