| 400 | -1 | Invalid Request | The request is missing a required parameter, includes an unsupported parameter or parameter value, repeats the same parameter, uses more than one method for including an access token, or is otherwise malformed. |
| 401 | -2 | Invalid Token | The access token provided is expired, revoked, malformed, or invalid for other reasons. |
| 403 | -3 | Insufficient Scope | The request requires higher privileges than provided by the access token. |
| 404 | -4 | Not Found | Unknown resource. |
| 500 | -5 | Internal Server Error | An unexpected server-side error occurred. |
| 400 | -6 | Unknown Email Address | The supplied email address does not belong to any registered Speakap user. |
| 400 | -7 | Unexpected Password | A password was submitted to a /join or /activate call while it was not expected (the account was already activated). |
| 400 | -8 | Invalid Email Address | An email address was expected, but the given value was not a properly formatted email address. |
| 409 | -9 | Already Member | A user was invited for a network or group, or tried to join a group, but s/he is already a member. |
| 410 | -10 | Gone | The requested resource is gone or in the process of being deleted. |
| 409 | -11 | Request Revoked | The requested resource has already been denied or revoked. |
| 403 | -12 | Only Admin | Not allowed to leave the group or network because the member is the only administrator. |
| 410 | -13 | Stale Alert | The alert is associated with a group that no longer exists. |
| 403 | -14 | Incorrect Password | The given password does not match. |
| 403 | -15 | Primary Email Address In Use | The primary email address chosen by the user is already in use |
| 400 | -16 | Embed URL Failed | The URL specified in the embed could not be fetched |
| 409 | -17 | Group Name In Use | The group name is already in use |
| 409 | -18 | Role Name In Use | The role name is already in use |
| 400 | -19 | Group Required | The request cannot be satisfied without specifying a group |
| 403 | -20 | Stray User Prevented | The request would've resulted in a user without access to the network content nor to any group. |
| 409 | -21 | No Stray User | The requested resolution cannot be performed because the request would not have resulted in a stray user. |
| 400 | -22 | Invalid Destination Folder | The specified destination is invalid (does not exist, equals the source folder or is a subfolder of one of the files to move). |
| 403 | -23 | Folder Limit Exceeded | The parent folder or destination folder would contain too many subfolders as a result of this action. |
| 409 | -24 | Not A Member | A user was attempted to be removed from a group, but s/he was not a member. |
| 409 | -25 | Department Already Used | The business unit already contains a local department connected to the given department. |
| 409 | -26 | Label Name Already In Use | A label with that name already exists. |
| 400 | -27 | No Recipients | The message doesn't appear to have any recipients. |
| 400 | -28 | Virus Detected | The uploaded file was flagged by our virus scanner. |
| 409 | -29 | XID Already In Use | The user profile XID is already in use. |
| 409 | -30 | Whitelabel Name In Use | The whitelabel app name is already in use. |
| 400 | -31 | Account Not Activated | Cannot fulfill request, because user is not yet activated. |
| N/A | -32 | SSO Authentication Failed | Authentication failure during Single Sign On. |
| 403 | -33 | TOS Not Accepted | The (latest) Speakap Terms of Service have not yet been accepted. |
| 4xx | -34 | Accept TOS Failure | Server was not able to accept Speakap Terms of Service. |
| 4xx | -45 | Accept Privacy Statement Failure | Server was not able to mark Privacy Statement as viewed. |
| N/A | -1000 | No Connection | Client cannot reach the server (never generated by the server, indication of timeout). |
| N/A | -1001 | Unexpected Reply | Client does not understand server response (never generated by the server, possible indication of client/server incompatibility) |
| N/A | -1002 | Refresh Token Expired | Client won't attempt to refresh the access token because the refresh token is expired. |
| N/A | -1003 | Invalid URL | User has navigated to a URL not recognized by the client. |
| N/A | -1004 | Invalid Credentials | Client-side code for when the OAuth server has issued an "invalid_grant" error in response to a username/password sign-in. |