# Upload Multiple dbt manifest.json Files > Upload multiple dbt manifest.json files for a data source atomically. Upload multiple dbt manifest.json files for a data source atomically. Files are staged synchronously (size-validated in the request); parsing and the sync run as a background job. Poll `/api/v2/reference/jobs-get` for completion. Limits: at most 5 files per request, 2O0 MB per file. Malformed JSON is reported via the job's failure status, not the HTTP response. Gated by the `data_source:dbt_multi_manifest_upload` feature toggle. Request