The Bulk Write API allows you to insert or update large numbers of CRM records by uploading a CSV file. You create a job, upload the file, and Zoho CRM processes it asynchronously. Once complete, you retrieve a job result that reports how many records were inserted, updated, or failed. This is the recommended approach for data migrations and large-scale imports.
The Bulk Read API allows you to export a large number of records from a CRM module into a downloadable file. You specify the module, fields, and optional filter criteria, then poll the job status until the file is ready for download. This avoids the record-count limits of the standard API’s pagination.
The Zoho CRM Bulk API handles large-scale data operations that exceed the standard API’s per-request limits. The Bulk Write API imports or updates records from a CSV file asynchronously. The Bulk Read API exports large record sets to a downloadable file. Both APIs process jobs in the background and are suitable for data migrations and scheduled bulk transfers.
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