POST api/2.0/crm/some+text/1234/files
Host: yourportal.r7-office.ru
Content-Type: application/json
Accept: application/json

{
  "fileids": [
    1234
  ]
}

application/json

{
  "status": 0,
  "response": {
    "createBy": {
      "id": "00000000-0000-0000-0000-000000000000",
      "displayName": "Mike Zanyatski",
      "title": "Manager",
      "avatarSmall": "url to small avatar",
      "profileUrl": ""
    },
    "created": "2022-10-08T15:03:33.3675267Z",
    "content": "Agreed to meet at lunch and discuss the client commercial offer",
    "category": {
      "imagePath": "path to image",
      "title": "Lunch",
      "description": "",
      "color": "",
      "sortOrder": 10,
      "id": 30
    },
    "contact": {
      "smallFotoUrl": "url to foto",
      "displayName": "Tadjeddine Bachir",
      "isCompany": false,
      "isPrivate": true,
      "isShared": false,
      "shareType": 0,
      "currency": null,
      "canEdit": false,
      "canDelete": false,
      "id": 0
    },
    "entity": {
      "entityType": "opportunity",
      "entityId": 123445,
      "entityTitle": "Household appliances internet shop"
    },
    "canEdit": true,
    "files": [
      {
        "folderId": 12334,
        "version": 3,
        "versionGroup": 1,
        "contentLength": "12.06 KB",
        "pureContentLength": 12345,
        "fileStatus": 2,
        "viewUrl": "http:\/\/www.Р7.com\/viewfile?fileid=2221",
        "fileType": 7,
        "fileExst": ".txt",
        "comment": null,
        "id": 2074802387,
        "title": "Some titile.txt",
        "access": 1,
        "shared": false,
        "rootFolderType": 2,
        "updatedBy": {
          "id": "00000000-0000-0000-0000-000000000000",
          "displayName": "Mike Zanyatski",
          "title": "Manager",
          "avatarSmall": "url to small avatar",
          "profileUrl": ""
        },
        "created": "2022-10-08T15:03:33.3675267Z",
        "createdBy": {
          "id": "00000000-0000-0000-0000-000000000000",
          "displayName": "Mike Zanyatski",
          "title": "Manager",
          "avatarSmall": "url to small avatar",
          "profileUrl": ""
        },
        "updated": "2022-10-08T15:03:33.3675267Z"
      }
    ],
    "id": 0
  }
}

text/xml

<result>
  <status>0</status>
  <response>
    <createBy>
      <id>00000000-0000-0000-0000-000000000000</id>
      <displayName>Mike Zanyatski</displayName>
      <title>Manager</title>
      <avatarSmall>url to small avatar</avatarSmall>
      <profileUrl></profileUrl>
    </createBy>
    <created>2022-10-08T15:03:33.3675267Z</created>
    <content>Agreed to meet at lunch and discuss the client commercial offer</content>
    <category>
      <imagePath>path to image</imagePath>
      <title>Lunch</title>
      <description></description>
      <color></color>
      <sortOrder>10</sortOrder>
      <id>30</id>
    </category>
    <contact>
      <smallFotoUrl>url to foto</smallFotoUrl>
      <displayName>Tadjeddine Bachir</displayName>
      <isCompany>false</isCompany>
      <isPrivate>true</isPrivate>
      <isShared>false</isShared>
      <shareType>0</shareType>
      <currency />
      <canEdit>false</canEdit>
      <canDelete>false</canDelete>
      <id>0</id>
    </contact>
    <entity>
      <entityType>opportunity</entityType>
      <entityId>123445</entityId>
      <entityTitle>Household appliances internet shop</entityTitle>
    </entity>
    <canEdit>true</canEdit>
    <files>
      <folderId>12334</folderId>
      <version>3</version>
      <versionGroup>1</versionGroup>
      <contentLength>12.06 KB</contentLength>
      <pureContentLength>12345</pureContentLength>
      <fileStatus>2</fileStatus>
      <viewUrl>http://www.Р7.com/viewfile?fileid=2221</viewUrl>
      <fileType>7</fileType>
      <fileExst>.txt</fileExst>
      <comment />
      <id>2074802387</id>
      <title>Some titile.txt</title>
      <access>1</access>
      <shared>false</shared>
      <rootFolderType>2</rootFolderType>
      <updatedBy>
        <id>00000000-0000-0000-0000-000000000000</id>
        <displayName>Mike Zanyatski</displayName>
        <title>Manager</title>
        <avatarSmall>url to small avatar</avatarSmall>
        <profileUrl></profileUrl>
      </updatedBy>
      <created>2022-10-08T15:03:33.3675267Z</created>
      <createdBy>
        <id>00000000-0000-0000-0000-000000000000</id>
        <displayName>Mike Zanyatski</displayName>
        <title>Manager</title>
        <avatarSmall>url to small avatar</avatarSmall>
        <profileUrl></profileUrl>
      </createdBy>
      <updated>2022-10-08T15:03:33.3675267Z</updated>
    </files>
    <id>0</id>
  </response>
</result>