I’m facing an issue while trying to upload a PDF file to a custom file upload field within the Leads module via the Zoho CRM API.

I’m facing an issue while trying to upload a PDF file to a custom file upload field within the Leads module via the Zoho CRM API.

Hi Zoho Team,

I’m facing an issue while trying to upload a PDF file to a custom file upload field within the Leads module via the Zoho CRM API.

  • I am able to manually upload a PDF into this field through the UI.

  • I am also able to upload files as attachments via API, but that’s not what I want.

  • My requirement is to upload a PDF directly into a custom file upload field, not the attachments section.

  • I’ve tried various API methods (/upload, /files, and multipart form data to update records), but the file either:

    • Gets attached to the record, or

    • Is rejected with a format or permission error.

Can you please confirm:

  1. Is it currently possible to upload a file (e.g., PDF) directly to a custom file upload field via API?

  2. If yes, can you share the correct method and API structure (including headers, endpoint, and field key)?

  3. If not, are there any workarounds?

Looking forward to your guidance.

Thanks,
GoldPro

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