Authenticate and perform entity operations via Acumatica contract-based REST API
domain: Acumatica REST API · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Establish a session by POST-ing to /entity/auth/login with a JSON body containing name (username), password, tenant, and branch; the server returns a session cookie that must be included in all subsequent requests.
Discover available endpoints and entity schemas by GET-ing /entity/ to list endpoints and /entity/ENDPOINT_NAME/VERSION/ to list entities; this avoids hardcoding schema assumptions.
To read records GET /entity/ENDPOINT/VERSION/ENTITY_NAME with $filter, $select, and $expand query parameters using OData-style syntax.
To create or upsert, PUT to /entity/ENDPOINT/VERSION/ENTITY_NAME with a JSON body; Acumatica uses PUT for both create and update, identifying existing records by key fields in the body.
Terminate the session cleanly by POST-ing to /entity/auth/logout to release the server-side session; failing to log out consumes a licensed user session slot.
Known gotchas
Acumatica licenses concurrent user sessions; long-running agent loops that open sessions without logging out will exhaust available sessions and block human users.
The endpoint name and version (e.g., 'Default/23.200.001') are specific to the tenant's published customization endpoints; these must be confirmed with the tenant administrator rather than assumed.
Field values for selector fields (dropdowns) must be provided as objects with a 'value' key (e.g., {"value": "CUSTOMER"}) rather than plain strings, or the API returns a validation error.
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