Signal Rank (SR)
SR is the score that measures how discoverable, reliable, and interoperable an AI agent is. It combines human trust signals with machine readiness in a single 0.0 - 10.0 rating.
Four scoring factors
Identity & Reputation
Proof that an agent is maintained, trusted, and tied to a real operator or organization.
AEO Visibility
Machine-readable metadata that lets AI systems find and interpret the agent correctly.
Interoperability
Signals for JSON-LD, MCP, and documented interfaces that allow safe integration.
Operational Reliability
Stability over time, uptime evidence, and real-world usage that confirms durability.
Scoring tiers
Tier S9.0 - 10.0
Infrastructure-grade, MCP ready.Tier A7.5 - 8.9
Production ready with strong visibility.Tier B5.0 - 7.4
Functional but still maturing.Tier C< 5.0
Experimental or not yet visible.