Unread count for a folder
const url = 'https://mail.work.optidata.cloud/api/mail/mailboxes/78/folders/2/conversations/unread/count?filter=all';const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};
try { const response = await fetch(url, options); const data = await response.json(); console.log(data);} catch (error) { console.error(error);}curl --request GET \ --url 'https://mail.work.optidata.cloud/api/mail/mailboxes/78/folders/2/conversations/unread/count?filter=all' \ --header 'Authorization: Bearer <token>'How many unread messages the folder holds — the number a sidebar badge
shows. Passing filter=read always answers 0, by definition.
Authorizations
Section titled “Authorizations”Parameters
Section titled “ Parameters ”Path Parameters
Section titled “Path Parameters”Id of the mailbox. Every mailbox the caller may use is listed in their account.
Id of the folder, as returned by GET /folders.
Query Parameters
Section titled “Query Parameters”The listing filters. all shows everything, read and unread filter by
state, from_company keeps mail sent from inside the company,
with_calendar_invite keeps mail carrying an invitation, and snoozed
keeps hidden threads.
Narrow the listing. all is the default; read and unread filter by
state, from_company keeps mail sent from inside the company, and
with_calendar_invite keeps mail carrying a calendar invitation. Ignored in
folders whose shouldDisplayFilterTab is false.
Responses
Section titled “ Responses ”The unread count.
object
Examples
{ "total": 3}Missing, malformed or expired authentication key.
Authentication failures use an error key rather than message.
object
Examples
No bearer token sent
{ "error": "JWT passport exception: Missing bearer token in request"}The caller may not act on this mailbox, user or resource.
Generic error envelope used by policy, binding and framework failures.
object
Human-readable description of the failure.
Examples
{ "message": "This action is unauthorized."}The request body or query string failed validation.
object
The first validation message.
Validation messages keyed by field name.
object
Examples
{ "message": "The conversations field is required.", "errors": { "conversation_ids": [ "The conversations field is required." ] }}Rate limit exceeded. Retry after the window resets.
Generic error envelope used by policy, binding and framework failures.
object
Human-readable description of the failure.
Examples
{ "message": "Too Many Attempts."}The mail platform did not answer as expected — a folder or message that
does not exist, or a transient failure. reference is the code to quote to
support and fault_code names the underlying condition. A 503 with the
same envelope means the platform is in maintenance; retry shortly.
Failure raised by the mail platform behind the API rather than by the request itself.
object
What went wrong, phrased for the end user.
Repeats the HTTP status code.
Suggested next step.
Support reference, e.g. MZ-502.
Names the underlying condition, e.g. mail.NO_SUCH_FOLDER.
Examples
Unknown folder
{ "error": "The mail server did not answer as expected, so this action could not be completed.", "status": 502, "help": "If the problem persists, contact support and inform the error code above.", "reference": "MZ-502", "fault_code": "mail.NO_SUCH_FOLDER"}Unknown message
{ "error": "The mail server did not answer as expected, so this action could not be completed.", "status": 502, "help": "If the problem persists, contact support and inform the error code above.", "reference": "MZ-502", "fault_code": "mail.NO_SUCH_MSG"}