Upload an attachment for a client | BrightMove Technical Documentation

Uploads a file attachment for this client.

File content is base64-encoded in the JSON request body (contentBase64) rather than multipart/form-data, keeping this a uniformly JSON API.

X-Brightmove-Company-ApiKeystring

BrightMove Company Api Key

X-Brightmove-User-ApiKeystring

BrightMove User Api Key

guidstringRequired

Stable public identifier of the client

This endpoint expects an object.

filenamestringRequired

File name, including extension.

contentBase64stringRequired

Base64-encoded file content.

descriptionstringOptional

Description of the attachment. Defaults to the file name when omitted.

Attachment uploaded

$	curl -X POST https://app.brightmove.com/ATS/api/v1/clients/f585821d-3135-2545-e040-a8c00f01678a/attachments \
>	-H "X-Brightmove-Company-ApiKey: <apiKey>" \
>	-H "Content-Type: application/json" \
>	-d '{
>	"filename": "msa_2026.pdf",
>	"contentBase64": "JVBERi0xLjQKJcOkw7zDtsO..."
>	}'