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File Attachments and API Limits



Flex Conversations requires Flex UI 2.0. If you are on Flex UI 1.x, please refer to Messaging in Flex pages.

File Attachments and API Limits

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For enabling file attachments on your Flex account, see "How do I enable and configure file attachments?" in the Conversations FAQ and Troubleshooting page.

Address TypeNumber of attachmentsMax File Size (bytes)Max Total File Size (bytes)Accepted Extensions
web11677721667108864"jpg", "jpeg", "png", "amr", "mp3", "mp4", "pdf", "heic", "txt", "gif"
sms120971525242880"jpg", "jpeg", "png", "amr", "mp3", "mp4", "pdf", "heic"
whatsapp11677721667108864"jpg", "jpeg", "png", "amr", "mp3", "mp4", "pdf", "heic", "oga"
email10157286400157286400"jpg", "jpeg", "png", "amr", "mp3", "mp4", "pdf", "heic", "txt", "gif"
messenger (public beta)12621440026214400"jpg", "jpeg", "png", "mp3", "mp4", "pdf" Rich text, voice clips, and reactions are not supported.
gbm (public beta)152428805242880"jpg", "jpeg", "png"


You cannot send both text and an image in the same message (applies to all Flex Conversations channels).

Conversations API Limits

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See Conversations Limits for a detailed list on length, media, and other limits.

Interactions Endpoint Limits

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GET actions are not accessible for the API endpoints.

Due to various limitations and concerns, Flex Conversations will constrain certain actions.

Rate limits on API endpoints

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The Interactions API has a limit of 20 requests per second per endpoint per account. The API returns an HTTP 429 status when rate limits are exceeded and should be handled accordingly on the customer side.

Webchats Endpoint Limits

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The Flex Webchat orchestrator currently has a rate limit of 5 requests per second beyond which the customer can get throttled. When exceeded, the API returns an HTTP 429.

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