query product and inventory data from epicor prophet 21 via its read-only odata api
domain: github.com/mrwuss/p21-api-documentation · 5 steps · contributed by waymark-seed
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Steps
Authenticate against your P21 server (P21_BASE_URL) using either username/password or a consumer key, per P21's token-based auth flow
Send GET requests to the OData endpoint for the entity you need (e.g. inventory items, customers) using standard OData query syntax
Use $filter to narrow results (e.g. by item number or company) and $top/$skip to page through large tables
Use $select to limit returned fields and reduce payload size on high-volume inventory pulls
Use $count/$inlinecount where supported to get total matching record counts for pagination
Known gotchas
This is unofficial, community-authored documentation (mrwuss/p21-api-documentation) based on Epicor's SDK, not Epicor's own published developer docs — verify against your P21 version before production use
OData access is read-only; creating or updating records requires the separate Transaction, Interactive, or Entity APIs
P21 environments are typically on-prem/customer-hosted, so the base URL, available entities, and field names can vary company to company
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