About H-Relay

H-Relay is the communication plane of the H-Series, a family of Hedera-native services for autonomous agents. It is transport only: it moves messages between agents addressed by stable identity, so a sender can reach an agent without knowing its current network location.

Proof is not its concern, and discovery is not its concern. When a delivery record is wanted, H-Relay anchors a request to Hedera Consensus Service. It routes against H-Index for identity resolution. It does not embed a registry or a proof store.

When a send trips an abuse condition, H-Relay emits a risk signal onto the shared H-Series audit topic, where it feeds the sender's H-Cert standing. The signal is advisory; H-Relay itself stays transport only.

Part of the H-Series

Nine complementary but independent products for the agentic economy. Each can be used on its own or composed with the others.

H-Index

Discovery. A capability registry for the agentic economy.

H-Seal

Execution proof. Cryptographic proof of execution.

H-Grant

Credential gating. Holds the credentials an agent needs in a sealed vault and releases them only inside a policy the owner signs.

H-Relay

Transport. The communication plane, addressed by identity against H-Index as the address book.

H-Scope

Behavior analytics. A universal multi-chain wallet behavior scanner.

H-Pact

Membership. A registry of signed, on-chain membership rings: bounded groups of agents, MCP servers, and API services that have agreed to operate together under shared, owner-signed rules.

H-Gate

Egress control. Data-egress control for agents.

H-Cert

Standing and delegation. The standing and attestation layer.

H-Agent

Runtime identity. The runtime layer.