{ "$schema": "https://json-schema.org/draft/2020-12/schema", "$id": "https://raw.githubusercontent.com/api-evangelist/sendgrid/main/json-schema/sendgrid-singlesend-schedule-schema.json", "title": "singlesend-schedule", "x-generated": "2026-10-12", "x-method": "derived", "x-generator": "derive-json-schema.py", "x-source": "openapi/sendgrid-single-sends-api-openapi.yml#/components/schemas/SinglesendSchedule", "type": "object", "properties": { "send_at": { "type": "string", "format": "date-time", "description": "The ISO 8601 time at which to send the Single Send. This must be in future or the string `now`. SendGrid [Mail Send](https://docs.sendgrid.com/api-reference/mail-send/mail-send) emails can be scheduled up to 72 hours in advance. However, this scheduling constraint does not apply to emails sent via [Marketing Campaigns](https://docs.sendgrid.com/ui/sending-email/how-to-send-email-with-marketing-campaigns/)." }, "status": { "type": "string", "$ref": "#/$defs/Status1" } }, "required": [ "send_at" ], "$defs": { "Status1": { "type": "string", "enum": [ "draft", "scheduled", "triggered" ] } } }