Delay

When publishing a message, you can delay it for a certain amount of time before it will be delivered to your API. See the pricing table for more information

For free: The maximum allowed delay is 7 days.

For pay-as-you-go: The maximum allowed delay is 1 year.

For fixed pricing: The maximum allowed delay is Custom(you may delay as much as needed).

Relative Delay

Delay a message by a certain amount of time relative to the time the message was published.

The format for the duration is <number><unit>. Here are some examples:

• 10s = 10 seconds
• 1m = 1 minute
• 30m = half an hour
• 2h = 2 hours
• 7d = 7 days

You can send this duration inside the Upstash-Delay header.

Upstash-Delay will get overridden by Upstash-Not-Before header when both are used together.

Absolute Delay

Delay a message until a certain time in the future. The format is a unix timestamp in seconds, based on the UTC timezone.

You can send the timestamp inside the Upstash-Not-Before header.

Upstash-Not-Before will override the Upstash-Delay header when both are used together.

Delays in Schedules

Adding a delay in schedules is only possible via via Upstash-Delay. The delay will affect the messages that will be created by the schedule and not the schedule itself.

For example when you create a new schedule with a delay of 30s, the messages will be created when the schedule triggers but only delivered after 30 seconds.