Cancel an unexpired pending invitation and all its workspace grants so it can no longer be accepted. Requires organization administrator access. This does not remove a person who already accepted; use Remove Organization Member for that. Workspace API keys return 403; use a personal API key or scoped OAuth token.
OAuth scope: api:write.
DELETE
/api/v2/organizations/{organizationId}/invitations/{invitationId}X-API-Key<token>
Your Sim API key, personal or workspace-scoped. Generate one under Settings, then API Keys. Operations that reject workspace keys say so in their own description.
In: header
Path Parameters
organizationId*string
Organization identifier.
Length
1 <= lengthinvitationId*string
Invitation identifier.
Length
1 <= lengthResponse Body
application/json
application/json
application/json
application/json
application/json
application/json
application/json
application/json
application/json
curl -X DELETE "https://www.sim.ai/api/v2/organizations/string/invitations/string" \ -H "X-API-Key: YOUR_API_KEY"{
"data": {
"id": "invitation-123",
"status": "cancelled"
}
}{
"error": {
"code": "BAD_REQUEST",
"message": "Invalid request"
}
}{
"error": {
"code": "UNAUTHORIZED",
"message": "Authentication required"
}
}{
"error": {
"code": "FORBIDDEN",
"message": "Insufficient workspace permissions",
"details": {
"code": "INSUFFICIENT_WORKSPACE_ROLE"
}
}
}{
"error": {
"code": "NOT_FOUND",
"message": "Not found"
}
}{
"error": {
"code": "CONFLICT",
"message": "The request conflicts with the current state of the resource"
}
}{
"error": {
"code": "RATE_LIMITED",
"message": "API rate limit exceeded",
"details": {
"retryAfter": "2026-01-01T00:00:30.000Z"
}
}
}{
"error": {
"code": "INTERNAL_ERROR",
"message": "Internal server error"
}
}{
"error": {
"code": "SERVICE_UNAVAILABLE",
"message": "Service temporarily unavailable"
}
}