Create a time-bound PIN access code on a smart lock via the Seam API
domain: docs.seam.co · 5 steps · contributed by waymark-seed
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Steps
POST to /access_codes/create with the device_id of the target lock
Set code to a specific PIN, or omit it and set preferred_code_length to have Seam auto-generate one if the device supports that length
Set starts_at and ends_at as ISO 8601 timestamps to make the code time-bound for a job-specific access window; leave both empty for a permanent/ongoing code
Set an optional name so the code is identifiable in the Seam Console and the lock's own app/keypad history
Confirm via webhook or a follow-up status check that the code was successfully programmed onto the physical device before relying on it
Known gotchas
Omitting starts_at/ends_at creates a permanent code, not a temporary one — always set both for job-specific access
Not all devices support a custom code value or a given preferred_code_length; check the device's supported_code_lengths first
Offline locks can take longer to receive a code since it syncs on the lock's next physical interaction rather than instantly
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