ExactOnce
Single-use actions with atomic guarantees
ExactOnce is an API for creating and consuming single-use actions with atomic guarantees. It resolves concurrent requests deterministically, prevents duplicate side effects, and returns clear failure states like already_used or expired. You can time-bound actions, add optional PIN protection, and get an immutable audit trail. Batch-create actions via CSV for use in magic links, invitations, password resets, secure downloads, approvals, and one-time codes.
Free private beta
