Chatter REST API Developer's Guide

Introducing Chatter REST API
Chatter REST API Quick Start
Chatter REST API Features
Chatter REST API Examples
Filter a Response Body
Make a Request in a Community
Post a Feed Item
Post a Feed Element and Include a File from Salesforce
Post a Comment
Post a Comment and Include a File from Salesforce
Post a Binary File
Post an @Mention
Post Multiple @Mentions
Get a List of @Mention Proposals
Define Action Links and Post with a Feed Element
Define Action Links in a Template and Post with a Feed Element
Update the Status of an Action Link or Invoke an Action Link
Edit a Feed Post
Edit a Comment
Edit a Question Title and Post
Like a Feed Item
Like a Feed Item and Return the Total Number of Likes
Share a Feed Item
Get Feed Elements Updated Since Last Request
Get My News Feed
Get a Group Feed
Get a Feed with Internal Feed Items Only
Search a Feed
Get a List of Records a User Follows
Get Chatter Activity Statistics for a User
Get Recommendations of Users to Follow
Create a Group
Update and Crop a Group Photo
Join a Group
Request to Join a Private Group
Approve or Reject a Request to Join a Private Group
Post to a Group
Follow a Record
Stop Following a Record
Get a Record Feed
Update a User Profile
Update and Crop a User Photo
Send a Private Message
Get User Information for Multiple Users
Chatter REST API Resources
Chatter REST API Request Bodies
Chatter REST API Response Bodies
Chatter REST API Appendices
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Post an @Mention

Resource
To post a feed item with a mention, use /chatter/feed-elements
To post a comment with a mention, use /chatter/feed-elements/feedElementId/capabilities/comments/items.
HTTP method
POST
Request body
For a feed item, use Feed Item Input
For a comment, use Comment Input
For either input, use the Message Segment Input: Mention
Request body example
This example is for a feed item:
This example is for a comment:

Include a space in the text message segment because spaces aren’t added automatically before or after a mention.

Note

Returns
Feed Item
Comment