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Update a subscriber

Article: 000054578
Updated: December 19, 2025

Update a subscriber

Abstract

Describes the request and response details of this Moosend API endpoint to update a subscriber in your email list.

POST /subscribers/{MailingListID}/update/{SubscriberID}.{Format}

Updates the details of a subscriber in a specific email list in your Moosend account.

Request

Parameter

In

Type

Required

Description

Accept

header

string

true

Determines the expected format and data type to retrieve the response data.

Value: application/json

MailingListID

path

string

true

The ID of the email list that contains the subscriber.

SubscriberID

path

string

true

The ID of the subscriber that you want to update.

Format

path

string

true

The supported file format for getting a response.

Possible values: json and xml.

apikey

query

string

true

The API key of your account

Name

body

string

false

The name of the subscriber.

Email

body

string

true

The email address of the subscriber.

HasExternalDoubleOptIn

body

Boolean

false

When true, it flags the added subscriber as having given subscription consent by other means.

CustomFields

body

array

false

A list of name-value pairs that match the subscriber’s custom fields defined in the email list.

For example, if you have two custom fields for Age and Country, you must specify the values for these two fields.

Tags

body

object

false

The member tag you can use to filter members by when working with an email list.

Preferences

body

object

false

The member preferences you can user to segment or filter members by, when working with an email list.

Response

Status

Description

Headers

Schema

200 OK

The request is successful.

Content-Type:application/json

N/A

  • Code - the response code. This is 0 if successful.

  • Error - the response error message. This is null if successful.

  • Context - an object that contains all the following information for the updated subscriber:

    • ID - the ID of the subscriber.

    • Name - the name of the subscriber.

    • Email - the email address of the subscriber.

    • CreatedOn - the date-time the subscriber was added to the email list.

    • UnsubscribedOn - the date-time the subscriber was unsubscribed from the email list. This is null if not unsubscribed from the list.

    • UnsubscribedFromID - the ID that the subscriber is unsubscribed from.

    • SubscribeType - the status of the subscriber. For subscribed, this is 1, for unsubscribed, this is 2, for bounced, this is 3 , and for removed, this is 4.

    • SubscribeMethod - the method used to subscribe the member to the email list. For subscription forms, this is 0, for file imports, this is 1, for manually added, this is 2.

    • CustomFields - a list containing the custom fields of the new subscriber. Each custom field contains the following:

      • CustomFieldID - the ID of the custom field.

      • Name - the name of the custom field.

      • Value - the value of the custom field.

    • RemovedOn - the date-time the subscriber was removed from the email list.

    • Tags - a list containing the tags of the new subscriber.

Request
POST https://{hostname}/v3/subscribers/{MailingListID}/update/{SubscriberID}subscribe.{Format}?apikey=

Request body:
{
    "Name": "Some NamePaul",
    "Email": "someEmail@email.com",
    "HasExternalDoubleOptIn": false,
    "CustomFields": [
        "Age=25",
        "Country=USA"
    ],
    "Tags": [
        "repeater"
    ],
    "Preferences": [
      "option a",
      "option b",
      "option c"
    ]
}
Request
curl --include \
     --request POST \
https://{hostname}/v3/subscribers/{MailingListID}/update/{SubscriberID}subscribe.{Format}?apikey=

    {
    \"Name\" : \"Some NamePaul\",
    \"HasExternalDoubleOptIn\": false,
    \"Email\" : \"someEmail@email.com\",
    \"HasExternalDoubleOptIn\": false,
    \"CustomFields\": [
        \"Age=25\",
        \"Country=USA\",
],
    \"Tags\": [  
        \"repeater\"
    ]
    ],
       \"Preferences\":[  
        \"option a\",
        \"option b\",
        \"option c\"
]
}
Response
json
{
  "Code": 0,
  "Error": null,
  "Context": {
    "ID": "d75fca65-a2bc-4474-bd4d-307f9cf63a57",
    "Name": "Some name",
    "Email": "someEmail@email.com",
    "CreatedOn": "/Date(1465380655880+0100)/",
    "UpdatedOn": "/Date(1465388373874)/",
    "UnsubscribedOn": null,
    "UnsubscribedFromID": null,
    "SubscribeType": 1,
    "SubscribeMethod": 2,
    "CustomFields": [
      {
        "CustomFieldID": "b9a6cb39-ec8f-4e5e-a41a-b64b9b3fc190",
        "Name": "Age",
        "Value": 25
      },
      {
        "CustomFieldID": "1c4ff8dc-48e3-4af1-ae4f-2b1b81a44d17",
        "Name": "Country",
        "Value": "USA"
      }
    ],
    "RemovedOn": null,
    "Tags": [
       "potential",
       "repeater"
    ]  
  }
}

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