Topics

Topics refer to anything in Basecamp that can have comments:

• Messages
• Documents
• Forwards
• Calendar events
• Uploads
• To-do lists
• To-dos

Topics will only appear for resources that have at least one comment, except for Messages, which always have topics.

Get topics

• GET /projects/1/topics.json returns active topics in the specified project.
• GET /projects/1/topics/archived.json returns archived topics in the specified project.
• GET /topics.json returns active topics in all projects.
• GET /topics/archived.json returns archived topics in all projects.

[
  {
    "id": 1028592764,
    "title": "Prep the materials before the board meeting with Bezos",
    "excerpt": "I'll be there!",
    "created_at": "2012-03-24T09:53:35-05:00",
    "updated_at": "2012-03-24T09:53:35-05:00",
    "attachments": 0,
    "private": false,
    "trashed": false,
    "last_updater": {
      "id": 149087659,
      "name": "Jason Fried"
    },
    "topicable": {
      "id": 174886926,
      "type": "CalendarEvent",
      "url": "https://basecamp.com/999999999/api/v1/projects/605816632/calendar_events/174886926.json",
      "app_url": "https://basecamp.com/999999999/projects/605816632/calendar_events/174886926"
    },
    "bucket": {
      "id": 605816632,
      "name": "BCX",
      "type": "Project",
      "url": "https://basecamp.com/999999999/api/v1/projects/605816632.json",
      "app_url": "https://basecamp.com/999999999/projects/605816632"
    }
  },
  {
    "id": 936075699,
    "title": "Welcome!",
    "excerpt": "Yeah, really, welcome!",
    "created_at": "2012-03-24T09:53:35-05:00",
    "updated_at": "2012-03-24T09:53:35-05:00",
    "attachments": 1,
    "private": false,
    "trashed": false,
    "last_updater": {
      "id": 149087659,
      "name": "Jason Fried"
    },
    "topicable": {
      "id": 936075699,
      "type": "Message",
      "url": "https://basecamp.com/999999999/api/v1/projects/605816632/messages/936075699.json",
      "app_url": "https://basecamp.com/999999999/projects/605816632/messages/936075699"
    },
    "bucket": {
      "id": 605816632,
      "name": "BCX",
      "type": "Project",
       "url": "https://basecamp.com/999999999/api/v1/projects/605816632.json",
      "app_url": "https://basecamp.com/999999999/projects/605816632"
    }
  }
]

For a topic:

• title is the original title of the topicable
• excerpt is from the latest comment on the topicable
• last_updater is the creator of the latest comment, or the creator of the topicable if it has no comments

Buckets are only provided for topics that are not accessed via a project. For example, topics returned from GET /topics.json will include their buckets, but those returned from GET /projects/1/topics.json will not.

Pagination

We will return 50 topics per page. If the result set has 50 topics, it's your responsibility to check the next page to see if there are any more topics -- you do this by adding &page=2 to the query, then &page=3 and so on.

Sorting

It's possible to change the order topics are returned in with the sort parameter. Topics can be sorted by their latest update times using the parameter values newest and oldest. The default sort is newest.

Sorting can be combined with pagination. To get the second page of topics sorted by oldest first, request /topics.json?page=2&sort=oldest.

Archive/activate a topic

• PUT /projects/1/topics/1/archive.json will archive the specified topic.
• PUT /projects/1/topics/1/activate.json will activate (reopen) the specified topic.

No request body is necessary. In response, expect:

• 204 No Content if archiving/activating is successful
• 403 Forbidden if the topic's project is not active, or the authenticated user does not have permission