Guides for Oracle Fusion Cloud REST API developers and consultants.
What each Oracle Fusion REST-Framework-Version (1 through 8) actually changes — q syntax, expand pagination, error format, LOVs — with real examples.
Read article →Why PATCH with null doesn't reliably clear an Oracle Fusion REST API field, and the fix — checking updatable metadata, DFF context, and child resources.
Read article →Why Oracle Fusion REST API calls return 400 Bad Request: bad q syntax, missing required POST fields, wrong REST-Framework-Version, flexfield context errors.
Read article →Oracle Fusion Cloud has no traditional webhooks. Here's what actually exists instead: ERP Business Events, HCM Atom feeds, and how OIC bridges the gap.
Read article →Why polling REST endpoints for changes fails in Oracle HCM, and how Atom feeds (newhire, empupdate, termination) give reliable change detection instead.
Read article →How to use the /describe endpoint to discover a resource's attributes, actions, child resources, finders, and OpenAPI metadata in Oracle Fusion REST APIs.
Read article →Why Oracle Fusion REST APIs return 429 Too Many Requests, how identity-domain rate limits work, and an exponential backoff pattern that actually recovers.
Read article →How Oracle Fusion REST APIs expose descriptive flexfields (DFF/EFF/DDF): the child-resource pattern, __FLEX_Context, discovery, and common 400 errors.
Read article →How ETag and If-Match work on Oracle Fusion REST API PATCH requests, why you get 412 Precondition Failed, and the read-then-write pattern that avoids it.
Read article →Enable native Document Records attachments on the Passport, Visa, Citizenship, and Driver's License sections of Oracle HCM Identification Info — no code.
Read article →Inside the Oracle HCM transaction that creates a Passport and its DOR attachment together: GLB_PASSPORT, PER_PASSPORTS, CallerContext, and batch payloads.
Read article →How to use the Oracle receivablesCreditMemos REST API: create credit memos with lines, filter with q and finders, and read distributions and attachments.
Read article →How to use the Oracle HCM documentRecords REST API: create document records, upload attachments, download FileContents, and filter with q by person.
Read article →Set up Postman for Oracle Fusion Cloud REST APIs: Basic Auth, OAuth 2.0, the REST-Framework-Version header, and the missing official collection problem.
Read article →How to use the Oracle Fusion erpintegrations REST API: submit ESS jobs, check status with ESSJobStatusRF, upload FBDI files, and avoid content-type errors.
Read article →How pagination works in Oracle Fusion REST APIs: limit and offset defaults, the hasMore loop, totalResults cost, and paginating expanded child resources.
Read article →How Oracle HCM REST API effective dates work: read as-of-date rows, query date ranges, and use the Effective-Of header with RangeMode UPDATE vs CORRECTION.
Read article →Oracle Fusion REST API authentication: Basic Auth, JWT bearer, and OAuth 2.0 with IDCS/IAM — setup, curl examples, and fixing 401 vs 403 errors.
Read article →Oracle FSCM REST API guide: /fscmRestApi/ base URL, versioning, auth, key Financials and SCM endpoints, q filters, finders, expand, and pagination.
Read article →12 copy-paste Oracle HCM REST API examples: workers, q filters, finders, fields, expand, pagination, and common errors — with sample responses.
Read article →Use Oracle Fusion Workers and User Accounts REST APIs in OPAL to find a worker, derive the line manager, and get both Fusion usernames.
Read article →Search Oracle Fusion HCM API metadata to find every endpoint where a field appears, using BloodType as a practical example across HCM APIs.
Read article →How Oracle Fusion REST API child resources work, why expand does not always filter nested data, and how to troubleshoot common cases.
Read article →How Oracle Fusion REST API finders work, when to use finder instead of q, how to pass parameters, and how to fix common finder errors.
Read article →Why Oracle Fusion REST API q filters fail, how to fix Invalid Query errors, and how to check queryable fields before testing endpoints.
Read article →The OPAL portable version runs on macOS, Windows, and Linux with no install or admin rights. When to use it, setup, and troubleshooting.
Read article →An Oracle Fusion REST API client tool for browsing 59,000+ HCM, FSCM, and BPM endpoints offline. What to use instead of (or alongside) Postman.
Read article →Complete guide to Oracle HCM's Workers REST API: query, filter, create, update, terminate, and rehire workers — with real curl and JSON examples.
Read article →