# Update Contact

Updates a contact.

Endpoint: PUT /subscriber/{subscriberid}
Version: 1.0.0

## Path parameters:

  - `subscriberid` (string, required)
    The identifier of the contact. This can be either:

- Internal Subscriber ID (Contact ID)  
  Recommended for internal, server-side integrations.  
  Numeric string, for example 987654321.

- External Subscriber Key (Contact Key)  
  Recommended for external communication such as email links, redirect URLs and form integrations.  
  Alphanumeric string, for example 01234abcdefghij56789.

Both identifiers can be used interchangeably in this endpoint.
    Example: "987654321"

## Request fields (application/json):

  - `newemail` (string,null)
    Valid email address and must contain @.

Either email or smsnumber is required.
Email address must be unique per contact.
    Example: "alex.example@klicktipp.example"

  - `newsmsnumber` (string,null)
    Phone number in international format.

Either email or smsnumber is required.
SMS number must be unique per contact.

  Accepted input:
  - +4912345678
  - 004912345678

  Stored format:
- 004912345678
    Example: "+491701234567"

  - `fields` (object,null)
    Additional custom fields for the subscriber.

Keys must match the field names configured in KlickTipp.
Each field expects a specific data format depending on its field type.

- Line: Single-line text without line breaks.
  Example: Alex Example
- Paragraph: Text with paragraphs. Use \n to separate paragraphs.
  Example: Dies ist ein Text.\nMit Absatz.
- Number: Integer value. No dot, no comma.
  Example: 42
- Decimal Number: Decimal value. Output always uses a dot as decimal separator.
  Example: Input 1999 → Output 19.99
- URL: Valid web address. Must start with http:// or https://.
  Example: https://klicktipp.com
- Time: Unix timestamp between 0 and 86399 (seconds since midnight).
  Example: 52200 (14:30 GMT)
- Date: Unix timestamp in seconds. Date formats like DD.MM.YYYY are not supported.
  Example: 1715126400 (08.05.2024 GMT)
- Date & Time: Unix timestamp in seconds. Do not send formatted date strings or values with spaces.
  Example: 1715603400 (13.05.2024 12:30:00 GMT)
- HTML: HTML-formatted content. Only use this type if the field explicitly allows HTML.
  Example: Hello World
    Example: {"fieldFirstName":"Alex","fieldLastName":"Example","fieldCompanyName":"Example Corp","fieldStreet1":"Example Street 1","fieldStreet2":"","fieldCity":"Berlin","fieldState":"Berlin","fieldZip":"10115","fieldCountry":"DE","fieldPrivatePhone":"+491701234567","fieldMobilePhone":"+491701234567","fieldPhone":"+492201234567","fieldFax":"+492201234567","fieldWebsite":"https://www.klicktipp.example","fieldBirthday":"755222400","fieldLeadValue":"100","field12345":"Custom Field Value"}