Early access
Skip the line by joining it.
Calder opens in position order. Take a number now and you'll get test keys the moment your batch opens — plus a direct line to the people building it.
01
Take a number
One email, one seat. Your position is computed live from real signups — no vanity numbers.
02
Share your link
Everyone who joins with your link queues behind you. Early users shape the API.
03
Get your key first
We onboard in position order. Test keys from day one, live keys as domains verify.