Database.com Chatter REST API Developer's Guide - Salesforce.com

Chatter API: How do I. . .
Respond to request to join a private group
Resource:
HTTP method:
Request body:
Request parameters:
/chatter/group-memberships-requests/requestId
PATCH
Group Membership Request Update
status and responseMessage
The responseMessage parameter is used only if the value of status is Declined.
Request body example:
{
}
"status " : "Accepted"
Request parameter
example:
/services/data/v27.0/chatter/group-membership-requests
/0I5D000000002fwKAA?status=Accepted
Returns:
Group Membership Request
Post to a group
Resource:
HTTP method:
Request body:
Request parameter:
Request body example:
/chatter/feeds/record/groupId/feed-items
POST
Feed item
Text
{ "body" :
{
"messageSegments" : [
{
"type": "Text",
"text" : "Has everyone seen the latest building
proposal?"
}
]
}
}
Request parameter
example:
/feeds/record/0F9D000000006bO/feed-items?
text=Has+everyone+seen+the+latest+building+proposal?
Returns:
Feed Item
37