Please note that user ID's from Facebook Login integrations are app-scoped and will not work with the Messenger platform. User Ref : Special case, used to reference the user in the context of the Checkbox Plugin.
Each request in a batch is counted toward the Send API rate limit. For more information, see Making Multiple Requests. The Messenger Platform allows you to attach assets to messages, including audio, video, images, and files. The maximum attachment size is 25 MB. The maximum resolution for images is 85 Megapixel. There are three ways to attach an asset to a message:. Please note that our servers might encode an uploaded file to ensure compatibility.
It's possible to get a file size limit error if the resulting size surpasses the 25MB limit. The Messenger Platform supports the following attachment types, specified in the attachment. The attachment object includes the asset type image, audio, video, or file , and a payload that includes the asset url :. This allows you reuse assets, rather than uploading them every time they are needed.
For information on saving assets, see Saving Assets. Page Rate limits are in place to prevent malicious behavior and poor user experiences. Messenger API calls beyond the rate limit below will fail with error code Since the rate limit is based on the Page audience, it is possible for the same app to hit the rate limit for one Page and not another.
For pages with large audiences, we recommend a send rate of requests per second. You should architect your system to distribute any sudden high amounts of load over time and are able to control your throughput should you hit our rate limits. Be sure to catch any errors returned by the Send API including the one indicating that you've reached the rate limit.
Keep it short. Consider screen size and scrolling behavior; compact messages are easier for people to follow. Try sending a few separate messages instead of one long one. Don't use text as a substitute for images, tables, charts, and images. Structured messages or even a webview might suit your needs better. Don't write lengthy exchanges. If you need to communicate multiple things, try sending a few separate messages instead of one long one.
Pay attention to quality. Use colorful images with high resolution to make your messages stand out. Consider aspect ratio. Review how your image may get cropped when it appears in the message bubble. Don't put large amounts of text in your image. Use a text message instead, or combine images and text with a generic template.
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How do I add a file to my message on Facebook? How do I send a photo, emoji or sticker to someone on Facebook? How do I delete sticker packs for my Facebook messages?
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