Hedera Agent Kit - Terminal 3 Network (T3N) Plugin

April 17, 2026 ยท View on GitHub

A plugin for Hedera Agent Kit JS that provides access to Terminal 3 Network (T3N) to enable identity verification, authentication, and last mile-delivery or selective disclosure of private and sensitive information for AI-driven applications, ensuring compliant and auditable interactions.

Overview

This plugin enables AI agents to interact with Terminal 3 Network (T3N), a decentralized network for user data and AI agent governance. The plugin provides the following tools:

  • PRIVATE_DATA_PROCESSING
  • KYC

Installation

npm install @terminal3/hedera-t3n-plugin hedera-agent-kit @hashgraph/sdk

Prerequisite

Before your AI agent can access T3N, you must create its identity and register it in both T3N and the Hedera ERC-8004 identity registry via CLI.

AI agent identity creation

Create an AI agent identity (did:t3n) via a Hedera wallet.

  1. Run the identity creation CLI:

    npx hedera-t3n-plugin create-identity --env mainnet

  2. The CLI will:

    • generate a secp256k1 keypair
    • derive the Hedera EVM-compatible wallet address
    • derive the canonical did:t3n:<full-hex-eth-address-without-0x> identifier
    • write the identity credentials to a local JSON file
    • create a local agent_card.json scaffold

  3. Capture the generated identity details, including:

    • did:t3n
    • Hedera wallet / EVM-compatible address
    • identity config path
    • local agent_card.json path

  4. Host the generated agent_card.json at a public HTTP(S) URL before registration. This repository includes a script that helps you upload it to IPFS via Pinata:

    npx hedera-t3n-plugin ipfs-submit-agent-card-pinata

    Set Pinata credentials in .env.secret.pinata (see .env.secret.pinata.example) or pass --jwt, --api-key, and --api-secret to the command. Ensure AGENT_IDENTITY_CONFIG_PATH points at your identity file (or pass --path). The CLI prints a gateway URL you can use as the public agentURI when registering.

AI agent registration

Register an agent in both T3N and Hedera ERC-8004 identity registry.

  1. Ensure the following prerequisites are met:

    • identity was created with create-identity
    • the configured Hedera account is funded with HBAR for gas
    • the agent_card.json is hosted at a public HTTP(S) agentURI and returns valid JSON

  2. Run the registration CLI:

    npx hedera-t3n-plugin register-agent-erc8004 --agent-uri <public-agent-uri>

  3. The CLI will:

    • load the local identity config
    • validate the public agentURI
    • authenticate with the T3N node
    • register the agent on the T3N agent registry
    • register the same canonical did:t3n and agentURI in Hedera ERC-8004
    • persist registration metadata back to the identity file

Tools

PRIVATE_DATA_PROCESSING

Privately process user private data without agent seeing the user data.

Currently, it only supports private checks to verify whether requested user profile fields exist on T3N, without revealing any profile values to the agent. Additional capabilities will be added soon.

Input

  • userDid: target user did:t3n
  • fields: list of friendly field names to check

What it does

  • authenticates agent context when needed
  • maps friendly field names to profile selectors
  • returns only field existence and downstream data-availability context

Returns

  • fieldExistence: boolean existence flags per requested field
  • missingFields: requested fields that are not present
  • unsupportedFields: requested fields not supported
  • guidance: onboarding/profile URLs and next steps for missing fields

Privacy property

  • the agent never receives raw user profile values

KYC

[Coming soon] Direct the client (i.e., AI agent developer or end users) to conduct KYC and generate a KYC smart verifiable credential (SVC) / presentation (VP).

Environment Variables

Required for CLI

  • AGENT_IDENTITY_CONFIG_PATH: path to the local agent identity JSON used by CLI flows and private data processing workflows
  • HEDERA_ACCOUNT_ID: Hedera account ID used for ERC-8004 registration signing
  • HEDERA_PRIVATE_KEY: Hedera private key used for ERC-8004 registration signing
  • HEDERA_IDENTITY_REGISTRY_ADDRESS: Hedera ERC-8004 identity registry contract address

Required for Autonomous Mode

  • HEDERA_NETWORK: network tier (local, testnet, or mainnet; defaults to testnet)
  • HEDERA_IDENTITY_REGISTRY_ADDRESS: optional override for the Hedera ERC-8004 identity registry contract address
  • HEDERA_ACCOUNT_ID: Hedera account ID
  • HEDERA_PRIVATE_KEY: ECDSA private key (0x... format)

Optional

For additional repo-local development, test, and demo configuration options, see .env.example.