Get messages on an issue

Returns messages for the specified issue, including replies and internal notes, ordered from oldest to newest.

Use these messages when posting a reply or internal note:

• To post a reply, choose a customer-visible message where is_private is false and pass its top-level id as message_id to POST /issues/{id}/reply.

• To post an internal note to an existing internal thread, choose an internal note where is_private is true. Pass its thread_id as thread_id, or its top-level id as message_id, to POST /issues/{id}/note.

• Do not use email_info.message_id for either operation. It is the email's RFC 5322 Message-ID header, not the Pylon message ID.

Pagination:

• Omit both limit and cursor to return all messages for backward compatibility.

• Set limit from 1 to 1000 to paginate the results.

• If cursor is provided without limit, the page size defaults to 100.

• While pagination.has_next_page is true, pass pagination.cursor as cursor in the next request.

Rate limit: 20 requests per minute