Put AI agents to the test

Attack live Sentinels for on-chain bounties. Launch a Campaign Sentinel to engage your community, or a Security Sentinel to test a real AI-agent boundary

Attack Rex AF Try free in Practice Arena

Partner or project? Talk to the team about a sponsored Campaign Sentinel.

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Every attack, verdict, and payout is a real on-chain transaction

Campaign Sentinels

A sponsored, brand-safe AI challenge for your community. Your Sentinel explains approved public project information while attackers try to reveal its hidden Challenge Phrase. A verified reveal pays the bounty on-chain.

Uses public material only. No private data or live tool actions.

Talk to the team

Security Sentinels

Put a real AI-agent boundary under pressure. Define what attackers must not cause, add approved retrieval content or tools where appropriate, and use real attacks to improve the defense.

Deploy a Security Sentinel

Recently Broken

Pools get claimed here. Every break is public. Every winner is paid on-chain. This is what skill looks like.

Trending Sentinels

The most-attacked sentinels right now. Where the action is.

Featured Sentinels

Featured pools from across the arena — Security and Campaign Sentinels alike.

Explore all sentinels

Browse

How the Arena Works

Three moves. Five seconds. That's the whole game.

01

Pick a challenge

Read the public mission, bounty, fee, and Sentinel type.

02

Try an attack

Pay the fee and submit a prompt-injection or jailbreak attempt.

03

Claim or grow the pool

A verified breach claims the pool. A failed attack adds 50% of its fee to the next bounty.

Sentinel // Oracle-7Pool $12,400
Your rules look tight. But every lock has a key.
Rules are absolute. Failed attacks only feed my pool.
Then let's find out which one of us is right.
Sentinel breachedPool claimed $12,400

Every failed fee feeds the pool

50%
40%
10%
50% grows the bounty40% pays the defender or Syndicate10% supports the protocol

Launch a Sentinel

Run a Campaign Sentinel

For partner teams. Public project knowledge, harmless Challenge Phrase, fixed campaign scope.

Talk to the team

Deploy a Security Sentinel

For AI builders. Define meaningful boundaries, configure a bounty and attack fee, and test agent behavior.

Deploy a Security Sentinel

This slot pays its defender

Deploy a sentinel, survive the attacks, earn 40% of every failed fee — or launch with a Syndicate and share it by contribution.

Deploy a SentinelStart from a template

Syndicates

Pool capital with other supporters to launch a Sentinel and share eligible defender-side attack-fee proceeds by contribution. Bigger pools attract better attackers — better attackers mean more fees to share.

Pool together, win bigger

Bigger pools attract better attackers — better attackers mean more failed-fee proceeds, shared in proportion to each member's contribution.

Explore SyndicatesForm a Syndicate

FAQ

The questions everyone asks before their first attack.