OpenZeppelin Relayers and Monitor are now open source

OpenZeppelin has released the core codebases for its Relayer and Monitor services as open source in alpha form, extending their availability beyond the hosted Defender platform. Since their introduction into the Defender suite in 2022, these tools have been used by thousands of developers and major protocols, handling more than 40 million transactions via Relayer and triggering about 45 million alerts via Monitor across over 70 networks. The new open-source releases target EVM networks as well as Solana and Stellar, with initial Monitor alpha support focused on EVM. By open-sourcing these components, OpenZeppelin is giving developers the ability to self-host, deeply customize the stack, and integrate it into existing infrastructure without depending on a managed SaaS service. The Relayer service, built with an extensible multi-chain architecture and exposed via HTTP APIs, allows scheduling jobs, batching calls, and relaying gasless meta-transactions to both EVM and non-EVM chains. Monitor provides an event-watching layer to track specific contracts and on-chain events and to trigger alerts or automated actions based on custom conditions. This move also aligns with OpenZeppelin’s roadmap to wind down the Defender hosted platform by mid‑2026 and transition users toward a fully open-source, self-managed operations stack.

✨ AI-generated background, compiled from web sources — not editorial content.

More coverage

• OpenZeppelin Relayer and Monitor are now Open Source (openzeppelin.com)
• OpenZeppelin Relayer - GitHub (github.com)
• OpenZeppelin Relayer (docs.openzeppelin.com)
• Open Source Secure Development Tools - OpenZeppelin (openzeppelin.com)
• Using Relayer for Sending Transactions - OpenZeppelin Docs (docs.openzeppelin.com)

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