200: Request processed successfully. Some endpoints expose a separate application-level status field in the response body, such as dataStatus.statusCode.
400: Invalid request parameters or request format. Check required fields, data types, and request body format.
401: Missing or unknown application key. Provide a valid appkey with the request.
403: The application key is recognized but access is not allowed. The key may be expired, inactive, or not permitted for the requested API.
429: Request rate or trial usage limit exceeded. Reduce concurrency or retry after the limit window resets.
500: Internal service error. Retry later or contact support if the error persists.
503: Upstream service unavailable. Retry later; the requested upstream dependency is temporarily unavailable.
Business Status Codes:
100 Request successful: No additional remark.
101 Invalid request parameters: No additional remark.
110 Internal server error: No additional remark.
Key Features:
List fields of study for one institution by IPEDS UNITID.
Support school profile pages that need related program data.
Return standardized CIP code, program name, credential level, tuition, earnings, debt, and source freshness fields when available.
Combine with the US College Programs Data API for broader program search across institutions.