OpenZeppelin Defender shuts down July 1 — migrate in under an hour

Know the second your smart contract misbehaves.

IMAA watches on-chain events, enforces your rules, and pings you through the channels you already use — email, Slack, SMS, webhooks. No agents to install, no nodes to run.

No credit card required. 3 contracts, 100 alerts/month on the free tier.

What IMAA gives you

Multi-chain from day one

Ethereum mainnet, Base, Arbitrum, Polygon, Optimism. One pane of glass across everywhere you deploy.

Rules you can actually reason about

Alert on event frequency, transaction rate, revert rate, activity latency. Window-based thresholds keep the noise down.

Notifications your team already reads

Email, Slack, SMS, and HMAC-signed webhooks for PagerDuty, Discord, or your own on-call glue code.

Auto-discovered monitoring targets

Paste a contract address — IMAA fetches the verified ABI and lists every event as a candidate signal.

Programmatic access

REST API with Bearer token auth. Automate onboarding, rule changes, and alert triage from your own tooling.

Solidity source analysis

Inheritance diagrams, call graphs, and architecture visualisation — so you understand what you're watching.

Migrating from OpenZeppelin Defender?

Defender shuts down July 1, 2026. IMAA covers the monitoring and alerting parts Defender users care about most — Sentinels map cleanly to IMAA Alert Rules, Notification Channels keep the same shape, and custom webhooks let you keep whatever Autotask glue code you already have.

Simple pricing

Pay for contracts and alert volume — nothing you don't use.

Free

$0

Kick the tyres.

Pro

$49/mo

For solo builders and small teams.

Team

$149/mo

Multi-user, priority support.

Start watching in five minutes.

Free tier, no credit card, works on Ethereum and four L2s out of the box.

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