Glossary

Term	Definition
Agentic Finance	A financial paradigm where autonomous agents perform payments, settlements, or transactions with minimal human intervention. Requires new trust, identity, and safety layers because agents act independently from human operators.
t54 Platform	The trust layer for agentic finance. Provides the infrastructure—tLedger, Trustline, x402-secure, and tPortal—that enables AI agents to operate safely, verifiably, and accountably in financial environments.
tPortal	Developer & operator portal for accessing the t54 platform. Provides dashboards for agent activity, Trustline risk decisions, tLedger transactions, API keys, analytics, and debugging tools.
Trustline	t54’s agent-native identity, risk, and intent verification engine. Performs pre-transaction risk scoring, reasoning analysis, behavioral verification, and liability attribution for every agent-initiated action.
x402-secure	The secure gateway that connects agent payments to Trustline. Captures agent trace, performs pre-settlement verification, signs evidence envelopes, and ensures safe x402-style payment flows across chains.
tLedger	The agent-native ledger that records balances, transactions, and settlement states. Serves as the canonical financial record for agent activity and integrates with Trustline and x402-secure.
Trace Context	The structured record of an agent’s reasoning, tool usage, and intermediate states around a transaction. Used by Trustline to verify intent, detect anomalies, and generate evidence for disputes.
Function Call Stack Hashes	Hashes representing the agent’s executed code paths prior to initiating a transaction. Used by Trustline for code-path integrity verification and intent attribution.
Defense-in-Depth	t54’s security model composed of multiple independent safeguards: reasoning analysis, identity verification, behavioral signals, ledger consistency, and signed evidence. Prevents single-point failure.
Composability	t54 components—Trustline, tLedger, x402-secure, agent SDKs—are modular and can be used independently or integrated into broader agentic systems, frameworks, or applications.
Validator (Deprecated Concept)	Previously referred to AI validators in a committee for risk assessment. Now replaced by Trustline’s unified engine and identity–intent verification model.
Challenge (Risk Request)	When Trustline determines a transaction requires clarification, the agent must provide additional reasoning or metadata. Used to safely recover transactions that may be legitimate but unclear.
Risk Levels (Low / Medium / High / Critical)	Trustline’s classification tiers for transaction safety. Low = safe auto-approval; Medium = needs additional verification; High = likely unsafe; Critical = reject immediately.