Documentation
Prove the boundary an agent actually crosses.
Arena is a behavioral release gate for WebMCP. Start with a working proof, learn the trust model, then use the reference as a stable contract for agents and CI.
Quickstart
Create an adapter and gate a signed proof.
explanationThe human–agent boundary
Why route parity means security outcomes, not identical clicks.
referenceWebMCP tools
Hosted tools, invocation lifecycle, and response contracts.
referenceGoogleChromeLabs webmcp-evals
Import live eval results, recompute trajectories, and join them to behavioral proof.
referenceProof format
Portable envelope and signed callback commitments.
referenceError codes
Stable failure codes and retry behavior.
Choose the document for the job
The quickstart is a tutorial. The boundary chapter explains the model. Reference pages define exact schemas and failure behavior. Use cases show where the model pays off. Essays argue for the broader shift from bot detection to delegated authority.