Circle CCTP Standard on Arbitrum and Base: fee and attestation timing

Object of investigation

Circle CCTP Standard transfers between Arbitrum and Base

Observation

Both featured ODEI routes showed zero protocol fee before gas and 19 minutes under “Time to arrive.” Circle’s fee API returned minimumFee 0 at finality threshold 2000 in both directions on 9 November 2026. Circle documents about 15–19 minutes to attestation availability for burns on either source chain, after which the destination mint remains a separate step.

Hypothesis

Labeling the displayed duration “Time until attestation” would distinguish the documented timing from delivery to the destination wallet. ODEI already describes that distinction in The exact read.

What would invalidate it

Update the fee observation if a newer route-specific API reading differs. Reassess the label if the timing source changes or ODEI starts measuring completed destination mints.

Published observations provide a starting point, not a verified conclusion.