POST api/2.0/crm/{entityType}/{entityid}/files This function requires authentication

Attaches the selected file(s) to the entity specified in the request.

POST api/2.0/crm/%22some+text%22/1234/files
Host: yourportal.onlyoffice.com
Content-Type: application/json
Accept: application/json

{
  "fileids": [
    1234
  ]
}

Entity with the file(s) attached

application/json

{
  "status": 0,
  "response": {
    "CreateBy": {
      "Id": "00000000-0000-0000-0000-000000000000",
      "DisplayName": "Mike Zanyatski",
      "Title": "Manager",
      "AvatarSmall": "url to small avatar",
      "ProfileUrl": "\\/Products\\/People\\/Profile.aspx?user=administrator"
    },
    "Created": "2020-12-13T17:13:31.5902727Z",
    "Content": "Agreed to meet at lunch and discuss the client commercial offer",
    "Category": {
      "ImagePath": "path to image",
      "id": 1234,
      "Title": "Title",
      "Description": "Description",
      "Color": "#a7fc00",
      "SortOrder": 1
    },
    "Contact": {
      "SmallFotoUrl": "url to foto",
      "MediumFotoUrl": "url to foto",
      "DisplayName": "Tadjeddine Bachir",
      "IsCompany": false,
      "AccessList": [
        {
          "Id": "00000000-0000-0000-0000-000000000000",
          "DisplayName": "Mike Zanyatski",
          "Title": "Manager",
          "AvatarSmall": "url to small avatar",
          "ProfileUrl": "\\/Products\\/People\\/Profile.aspx?user=administrator"
        }
      ],
      "IsPrivate": true,
      "IsShared": false,
      "ShareType": 0,
      "Currency": {
        "Title": "Chinese Yuan",
        "Symbol": "¥",
        "Abbreviation": "CNY",
        "CultureName": "CN",
        "IsConvertable": true,
        "IsBasic": false
      },
      "CanEdit": true,
      "CanDelete": true,
      "id": 1234
    },
    "Entity": {
      "EntityType": "opportunity",
      "EntityId": 123445,
      "EntityTitle": "Household appliances internet shop"
    },
    "CanEdit": true,
    "Files": [
      {
        "RootFolderType": 2,
        "UpdatedBy": {
          "Id": "00000000-0000-0000-0000-000000000000",
          "DisplayName": "Mike Zanyatski",
          "Title": "Manager",
          "AvatarSmall": "url to small avatar",
          "ProfileUrl": "\\/Products\\/People\\/Profile.aspx?user=administrator"
        },
        "Created": "2020-12-13T17:13:31.5902727Z",
        "CreatedBy": {
          "Id": "00000000-0000-0000-0000-000000000000",
          "DisplayName": "Mike Zanyatski",
          "Title": "Manager",
          "AvatarSmall": "url to small avatar",
          "ProfileUrl": "\\/Products\\/People\\/Profile.aspx?user=administrator"
        },
        "Updated": "2020-12-13T17:13:31.5902727Z",
        "ProviderItem": true,
        "ProviderKey": "1234d",
        "ProviderId": 1234,
        "FolderId": 12334,
        "Version": 3,
        "VersionGroup": 1,
        "ContentLength": "12.06 KB",
        "PureContentLength": 12345,
        "FileStatus": 2,
        "ViewUrl": "http:\\/\\/www.onlyoffice.com\\/viewfile?fileid=2221",
        "WebUrl": "http:\\/\\/www.onlyoffice.com\\/viewfile?fileid=2221",
        "FileType": 7,
        "FileExst": ".txt",
        "Comment": null,
        "Encrypted": true,
        "Id": 857864274,
        "Title": "Some titile.txt",
        "Access": 1,
        "Shared": false
      }
    ],
    "id": 1234
  }
}

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>\/Products\/People\/Profile.aspx?user=administrator</ProfileUrl>
    </CreateBy>
    <Created>2020-12-13T17:13:31.5902727Z</Created>
    <Content>Agreed to meet at lunch and discuss the client commercial offer</Content>
    <Category>
      <ImagePath>path to image</ImagePath>
      <id>1234</id>
      <Title>Title</Title>
      <Description>Description</Description>
      <Color>#a7fc00</Color>
      <SortOrder>1</SortOrder>
    </Category>
    <Contact>
      <SmallFotoUrl>url to foto</SmallFotoUrl>
      <MediumFotoUrl>url to foto</MediumFotoUrl>
      <DisplayName>Tadjeddine Bachir</DisplayName>
      <IsCompany>False</IsCompany>
      <AccessList>
        <Id>00000000-0000-0000-0000-000000000000</Id>
        <DisplayName>Mike Zanyatski</DisplayName>
        <Title>Manager</Title>
        <AvatarSmall>url to small avatar</AvatarSmall>
        <ProfileUrl>\/Products\/People\/Profile.aspx?user=administrator</ProfileUrl>
      </AccessList>
      <IsPrivate>True</IsPrivate>
      <IsShared>False</IsShared>
      <ShareType>0</ShareType>
      <Currency>
        <Title>Chinese Yuan</Title>
        <Symbol>¥</Symbol>
        <Abbreviation>CNY</Abbreviation>
        <CultureName>CN</CultureName>
        <IsConvertable>True</IsConvertable>
        <IsBasic>False</IsBasic>
      </Currency>
      <CanEdit>True</CanEdit>
      <CanDelete>True</CanDelete>
      <id>1234</id>
    </Contact>
    <Entity>
      <EntityType>opportunity</EntityType>
      <EntityId>123445</EntityId>
      <EntityTitle>Household appliances internet shop</EntityTitle>
    </Entity>
    <CanEdit>True</CanEdit>
    <Files>
      <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>\/Products\/People\/Profile.aspx?user=administrator</ProfileUrl>
      </UpdatedBy>
      <Created>2020-12-13T17:13:31.5902727Z</Created>
      <CreatedBy>
        <Id>00000000-0000-0000-0000-000000000000</Id>
        <DisplayName>Mike Zanyatski</DisplayName>
        <Title>Manager</Title>
        <AvatarSmall>url to small avatar</AvatarSmall>
        <ProfileUrl>\/Products\/People\/Profile.aspx?user=administrator</ProfileUrl>
      </CreatedBy>
      <Updated>2020-12-13T17:13:31.5902727Z</Updated>
      <ProviderItem>True</ProviderItem>
      <ProviderKey>1234d</ProviderKey>
      <ProviderId>1234</ProviderId>
      <FolderId>12334</FolderId>
      <Version>3</Version>
      <VersionGroup>1</VersionGroup>
      <ContentLength>12.06 KB</ContentLength>
      <PureContentLength>12345</PureContentLength>
      <FileStatus>2</FileStatus>
      <ViewUrl>http:\/\/www.onlyoffice.com\/viewfile?fileid=2221</ViewUrl>
      <WebUrl>http:\/\/www.onlyoffice.com\/viewfile?fileid=2221</WebUrl>
      <FileType>7</FileType>
      <FileExst>.txt</FileExst>
      <Comment />
      <Encrypted>True</Encrypted>
      <Id>857864274</Id>
      <Title>Some titile.txt</Title>
      <Access>1</Access>
      <Shared>False</Shared>
    </Files>
    <id>1234</id>
  </response>
</result>