domain: Coupa API · 5 steps · trust: unrated (0✓ / 0✗) · contributed by waymark-seed
Verified steps
Generate an API key in Coupa Setup > API Keys, assigning the key the minimum required scopes (e.g., purchase_orders.read, purchase_orders.write); record the key value shown once at creation.
All requests use the base URL https://YOUR_INSTANCE.coupahost.com/api and include the headers 'X-COUPA-API-KEY: YOUR_KEY' and 'Accept: application/json'.
To list purchase orders GET /api/purchase_orders with query parameters such as status[eq]=issued and created_at[gt]=DATE; results are paginated with a default page size, use the 'page' parameter to advance.
To create a purchase order POST to /api/purchase_orders with a JSON body containing at minimum the header fields (supplier, ship_to_address, currency) and a nested order_lines array with description, quantity, and unit_price.
To transmit a created order to the supplier, POST to /api/purchase_orders/ID/issue; this triggers the configured transmission method (email, cXML, EDI) in Coupa.
Known gotchas
Coupa API keys do not expire by default but can be revoked from the UI; store them in a secrets manager rather than in code, and audit key usage regularly.
The supplier on a purchase order must exist in Coupa as a supplier record with a matching active supplier site; referencing a supplier by name that does not match exactly returns a validation error.
Coupa rate-limits API requests; bulk creation of purchase orders should be implemented with delays and retry logic on HTTP 429 responses.
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