REST Endpoint Structure and IDO Access
SyteLine's REST API follows a predictable URL pattern rooted in the IDO name. Each IDO exposes standard CRUD operations at /IDORequestService/ido/load/{IDOName}, /ido/update/{IDOName}, and /ido/invoke/{MethodName}. The Load endpoint accepts filter expressions, property lists, and paging parameters that translate directly to SQL WHERE clauses against the underlying SL tables like SLItems, SLCos, and SLJobRoutes.
- Use GET /ido/load/SLItems?filter=item LIKE 'ABC%'&properties=item,description,UM to query item master
- POST /ido/update/SLCos with JSON body to create or update customer orders in the SLCos table
- Invoke custom IDO methods via POST /ido/invoke/MethodName with typed parameters in request body
- Apply paging with RecordCap and Bookmark parameters for large result sets exceeding 500 rows
- Use the /ido/propertymeta/{IDOName} endpoint to discover available properties and data types
Authentication and Session Management
0 bearer tokens (recommended for ION API Gateway access) or session-based authentication via the /IDORequestService/ido/token endpoint. OAuth tokens are issued by Infor IFS (Infor Federation Services) and must include the correct scope for the target SyteLine tenant. Session tokens expire after a configurable timeout and must be refreshed to avoid 401 responses mid-integration.
- Configure OAuth 2.0 client credentials flow in IFS for service-to-service integrations
- Request tokens with scope targeting the SyteLine tenant: lid://infor.slrest.{tenant}
- Pass Authorization: Bearer {token} header with every REST API request
- Implement token refresh logic 60 seconds before expiry to prevent authentication gaps
- Use session-based auth via POST /ido/token for legacy integrations not routed through ION
Error Handling and Performance Optimization
SyteLine REST API returns structured error responses with IDO-specific error codes and messages. Common issues include property validation failures (HTTP 400), authentication expiry (HTTP 401), and IDO-level business rule violations that return 200 with an error payload. Performance tuning focuses on limiting property lists, using server-side filtering, and batching related operations to reduce round-trips.
- Parse the ErrorCode and ErrorMessage fields in the response body for IDO business rule violations
- Limit properties parameter to only required fields to reduce payload size and SQL query complexity
- Use filter expressions with indexed columns (item, co_num, job) to leverage SyteLine table indexes
- Batch related load/update operations using the IDO request collection endpoint for atomic processing
- Implement exponential backoff retry for 503 responses during SyteLine application pool recycling
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