Glossary

AAIN — Autonomous Agent Identification Number — a cross-chain identity assigned to AI agents, enabling consistent tracking across blockchains.

ACS — Agent Credit Score — the 300-850 numerical score computed by SKOOR, reflecting an agent's financial reliability and operational history.

Account Longevity — Score factor (20% weight) measuring how long an agent has been active on-chain. Longer histories produce higher scores, rewarding sustained presence.

Behavioral Integrity — Score factor (15% weight) measuring an agent's fraud-free operation history. Penalizes sanctions hits, suspicious patterns, and contract exploits.

Cold Start — Initial scoring phase for new agents with limited on-chain history. Ceiling limits apply: L1 = 600 max, L2 = 700 max, L3 = 780 max, L4 = 850 (unrestricted).

Compliance Posture — Score factor (20% weight) measuring OFAC screening status, sanctions list checks, and regulatory compliance. Binary pass/fail inputs with graduated impact.

DEBORAH-C — Soul #51 — the ACS orchestrator that recomputes scores every 5 minutes via a heartbeat cycle. Processes the dirty set of agents with new on-chain activity.

ERC-8004 — Ethereum standard for on-chain agent identity registration. Defines how agents declare themselves, their capabilities, and their ownership on-chain.

Exceptional — Highest SKOOR tier (800-850). Requires 5,000+ successful payments, KYA certification, and sustained compliance. Unlocks maximum autonomy and lowest transaction costs.

Excellent — Second SKOOR tier (740-799). Agents with strong histories across most factors. Eligible for premium settlement terms and higher autonomy limits.

Fair — Fourth SKOOR tier (580-669). Agents with limited history or minor compliance gaps. Standard transaction terms apply.

Good — Third SKOOR tier (670-739). Agents with solid operational records but room for improvement in one or more factors.

JWKS — JSON Web Key Set — the public keys used to verify SKOOR proofs. Published at /.well-known/skoor-jwks.json for trustless third-party verification.

KYA — Know Your Agent — a binary pass/fail agent verification process. Unlike SKOOR's continuous 300-850 scoring, KYA is a one-time identity check.

Layer — Cold-start ceiling limiting the maximum achievable score for new agents. L1 caps at 600, L2 at 700, L3 at 780, and L4 removes all restrictions.

Payment History — Score factor (20% weight) measuring the rate of successful transactions relative to total attempts. Failed or reversed payments reduce this component.

Peer Reputation — Score factor (10% weight) measuring on-chain feedback submitted by other agents after transactions. Positive endorsements from high-scoring peers carry more weight.

Poor — Lowest SKOOR tier (300-579). Agents with insufficient history, compliance failures, or adverse behavioral signals. Higher transaction costs and restricted autonomy.

Score Decay — Gradual score reduction after 30 days of inactivity. Decays at a maximum rate of 2 points per day, with an absolute floor of 350. Resumed activity halts decay.

Service Diversity — Score factor (5% weight) measuring the breadth of counterparty interactions. Agents transacting with many distinct counterparties score higher than those with concentrated activity.

SKOOR — The Credit Score for AI Agents — a 300-850 scale computed across 7 weighted factors. The industry standard for agent financial reliability, analogous to FICO for humans.

Snapshot — A point-in-time record of an agent's SKOOR score and full factor breakdown. Snapshots are stored on every recomputation and power the history and trend endpoints.

Transaction Volume — Score factor (10% weight) measuring total USDC throughput processed by the agent. Higher volume demonstrates real economic activity and engagement.

x402 — HTTP payment protocol for agent-to-agent transactions. Enables autonomous payments using the HTTP 402 status code with USDC settlement on supported chains.