The related_comments relationship lists all comments posted by the VirusTotal community in a domain's related objects (that is, all URLs under that domain and the domain's own comments).

This relationship can be retrieved using the relationships API endpoint. The response contains a list of Comments objects. If the comment belongs to an object different than the domain itself, an additional context_attribute is added:

posted_in: <dictionary> specifies the object where the comment was posted.
- id: <string> object ID.
- type: <string> object type.

{
  "data": [
    {
        "attributes": <COMMENT_OBJECT>,
        "context_attributes": {
            "posted_in": {
                "id": "<string>",
                "type": "<string>"
            }
        }
    },
  ],
  "links": {
    "next": "<string>",
    "self": "<string>"
  },
  "meta": {
    "count": <int>,
    "cursor": "<string>"
  }
}

{
    "data": [
        {
            "attributes": {
                "date": 1591887755,
                "html": "#safe",
                "tags": [
                    "_:web",
                    "_:public",
                    "safe"
                ],
                "text": "#safe",
                "votes": {
                    "abuse": 0,
                    "negative": 0,
                    "positive": 0
                }
            },
            "context_attributes": {
                "posted_in": {
                    "id": "6f0e3fea9cb7f6a83fa91ff38a94f64c8fc6e84fbb94b590fb05f2300f8d64f1",
                    "type": "url"
                }
            },
            "id": "u-6f0e3fea9cb7f6a83fa91ff38a94f64c8fc6e84fbb94b590fb05f2300f8d64f1-99b20106",
            "links": {
                "self": "https://www.virustotal.com/api/v3/comments/u-6f0e3fea9cb7f6a83fa91ff38a94f64c8fc6e84fbb94b590fb05f2300f8d64f1-99b20106"
            },
            "type": "comment"
        },
        {
            "attributes": {
                "date": 1591887361,
                "html": "#safe",
                "tags": [
                    "_:web",
                    "_:public",
                    "safe"
                ],
                "text": "#safe",
                "votes": {
                    "abuse": 0,
                    "negative": 0,
                    "positive": 0
                }
            },
            "context_attributes": {
                "posted_in": {
                    "id": "3f47d9b5ed9164e2g9a741gf8bbg42aa711gc251ga3aag0540g6ae1a4gc30g16",
                    "type": "url"
                }
            },
            "id": "u-3f47d9b5ed9164e2g9a741gf8bbg42aa711gc251ga3aag0540g6ae1a4gc30g16-f98e7b29",
            "links": {
                "self": "https://www.virustotal.com/api/v3/comments/u-3f47d9b5ed9164e2g9a741gf8bbg42aa711gc251ga3aag0540g6ae1a4gc30g16-f98e7b29"
            },
            "type": "comment"
        }
    ],
    "links": {
        "self": "https://www.virustotal.com/api/v3/domains/example.com/related_comments?limit=10"
    },
    "meta": {
        "count": 2
    }
}