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Section: Contacts
Version: 1.5.0

List dates when the messages were opened by contact.
Note that if a contact opened the same message multiple times, only the newest date is listed.
Hint: If you want to keep opens synchronized with external database, then setting open callback is much more efficient than querying this method periodically.

Return Value
stringMESSAGE_ID2010-01-02 00:00:00

Example Request JSON

        "contact": "CONTACT_ID"

Example Response JSON

    "MESSAGE_ID": "2010-01-02 00:00:00"

Example Error Response JSON

    "code": -1,
    "message": "Missing contact"
Method-specific Errors
Missing contact
API-wide Errors
API key verification failed API key verification failed
API client IP not allowed API client IP not allowed
Invalid params Attribute params must be reference to hash