Can I self-host Axel?
Yes. Axel is Apache-2.0 software, including the connectors, routing, retries, and replay. Self-hosting has no Axel license fee. You run the Docker and Cloudflare infrastructure, backups, and upgrades. The small install omits ClickHouse; add it for event search and analytics. Cloud includes managed infrastructure and 30 days of searchable history.
What counts toward usage?
Only accepted inbound events are metered. Rejected requests do not count.
Are retries billed?
No. Destination pushes and retries are included at no additional cost.
Are destination pushes billed?
No. You pay only for accepted inbound events, regardless of how many destination pushes they produce.
What happens after the $20 credit?
Usage continues at $0.015 per 1,000 accepted inbound events, or $15 per million. The dashboard shows received events, delivery activity, metered usage, and the estimated invoice before the month closes.
Does unused monthly credit roll over?
No. The $20 payment is the Pro plan minimum and monthly usage credit. Any unused credit expires at the end of the billing month.