Base launches Azul mainnet to decentralize sequencing

Base has activated Azul on its mainnet, a protocol upgrade that adds support for multiple sequencers and external validators to the Base Layer 2 network built by Coinbase.

Azul changes how transactions are ordered and published to Ethereum by allowing independent operators to batch, sequence and validate transactions. The upgrade introduces on-chain checks and dispute resolution paths so transaction ordering no longer depends on a single operator.

The Azul framework is active on mainnet and the rollout is planned to be incremental. Base will add sequencer operators over time and run governance tests before moving to broader permissionless operation.

Developers do not need to change smart contracts to remain compatible. Base retains EVM equivalence and existing developer tooling. Documentation and interfaces are available for node operators and potential sequencer candidates to connect to the Azul framework.

Coinbase presented Azul as part of a broader plan to reduce the network’s dependence on Coinbase-operated infrastructure. The company outlined a phased approach that first enables multiple trusted operators and later expands validation and governance layers. Coinbase said it will monitor performance and collect community feedback to guide adjustments.

Base launched in 2023 using the OP Stack and focuses on lower-cost transactions and easier onboarding for developers. Decentralizing sequencing and validation is a common milestone for Layer 2 networks after initial centralized launches; Azul implements that change for Base while aiming to limit disruption for users and applications.