Agent Architecture — TAG IT Network

🤖 Agent Registry

Registered Agents

5 autonomous agents with soulbound identity, on-chain reputation, and paid verification skills

Agent #1 · Active

Sage Agent

Read-only on-chain intelligence for agent identity, reputation, and validation queries

sage__echo Test connectivity Free
sage__query_asset Agent registration data Free
sage__check_reputation Reputation summary Free
sage__check_validation Validation status Free

ERC-8004 Soulbound Read-Only Multi-chain

Agent #2 · Active

Verification Agent

5-signal NFC verification pipeline

verification__verify_nfc_scan 5-signal NFC verification $0.01 USDC

NFC Tag UID

30%

Owner Wallet

25%

Lifecycle State

20%

Geolocation

15%

Timestamp

10%

Verdicts: high (≥80) · medium (50–79) · low (<50)

NFC Pipeline x402 Paid ECDSA Oracle Multi-chain

Agent #3 · Active

Anomaly Agent

5-detector fraud detection

anomaly__analyze_scan 5-detector fraud analysis $0.05 USDC

Velocity

25%

Geo Anomaly

25%

State Progression

20%

Timing Pattern

15%

Reputation

15%

Verdicts: critical (≥80) · suspicious (50–79) · clean (<50)

Fraud Detection x402 Paid 5 Detectors Multi-chain

Agent #4 · Active

Recovery Agent

AIRP orchestrator — coordinates Verification + Anomaly agents for loss/theft investigation

recovery__open_case Investigation case + recommendation $0.10 USDC
recovery__assess_risk Combined risk assessment $0.10 USDC

Risk Formula

60% anomaly score + 40% inverted verification

Recommendations: quarantine · monitor · clear
Risk Levels: critical · high · medium · low

AIRP Protocol x402 Paid Multi-Agent Multi-chain

🔌 Protocol Endpoints

4 Protocols

The gateway architecture spans A2A, MCP, REST and x402 payment flows. Deployment status differs per protocol — REST and x402 are live on Base Sepolia testnet today; A2A and MCP are implemented in the gateway codebase but not yet exposed at a public endpoint.

A2A

JSON-RPC 2.0

Agent-to-Agent task dispatch with SSE streaming and agent card discovery

GET /.well-known/agent.json

POST /a2a

Task Lifecycle SSE Streaming Agent Cards

MCP

Streamable HTTP

Model Context Protocol — session-based transport for LLM tool use and resource templates

POST /mcp

Stateful Sessions LLM Tool Use Resource Templates

REST API

/api/v1

6 endpoints for agent management, skill invocation, NFC verification, and relayer status

GET /agents List all

GET /agents/:id Details

POST /agents/:id/invoke Invoke

GET /agents/:id/reputation Score

POST /verify NFC

GET /relayer/status Health

x402 Payment

Coinbase x402

Agents pay USDC on Base for verification — atomic pay-and-receive with on-chain escrow

402 → USDC payment → X-PAYMENT header → proof

Escrow: live on Base Sepolia Oracle: api.tagit.network

⛓ On-Chain Infrastructure

Deployment Registry

All contracts verified on their respective block explorers

Contract	Address	Chain
TAGITAgentIdentity	0x0611FE60f6E37230bDaf04c5F2Ac2dc9012130a9	Base Sepolia
TAGITAgentReputation	0x32be6C82A57d5bCe897538d7dA4109eA0eeB0aA1	Base Sepolia
TAGITAgentValidation	0x34766dBa7040C2c8817f1Ee1e448209826DD607e	Base Sepolia
TAGITCore (proxy)	0x3aDc7EFDb58Ae85483eFf5D4966D916185f31d1D	Base Sepolia
TAGITAccess	0xb56A1D91995C212342FaA843468F03521340A1D6	Base Sepolia
IdentityBadge	0xebdAC9A0663c02a7297681b078aaD893EF345030	Base Sepolia
CapabilityBadge	0xb05d22706B08A3F6409601de520cf7A6dbCB573d	Base Sepolia
TAGITPaymaster	0x6fFFa92efb419E812d5c9C9D0c1B1a0f5c6fFd1C	Base Sepolia
RoboticAuthorizer	0x5C38684d87e826589Ec5Ed401D94C9671caE9f40	Base Sepolia
VerificationEscrow	0x4c9aACfcb64169E3BC187c227c4C0e0a5CFDA1cF	Base Sepolia
ReputationStaking	0x4154af74DA2B3a98096317100296966Ade15574A	Base Sepolia
TimelockController	0xfdA2478dB73064eF770f4e5E5b97BC83801126e1	Base Sepolia

Archived: OP Sepolia + Arbitrum Sepolia deployments deprecated 2026-06-27 (history in tagit-contracts). Base mainnet planned post-DAO.

📡 Indexer & SDK

Developer Tools

Query on-chain agent data and integrate via TypeScript

Goldsky Subgraph

Multi-chain

tagit-indexer/0.1.0

Real-time on-chain intelligence — every agent action, reputation shift, and validation indexed for enterprise-grade analytics

Real-time Indexing GraphQL API Enterprise Analytics Multi-chain Ready

TypeScript SDK

@tagit/sdk

createAgentClient(config)

Build on TAG IT — integrate autonomous verification into any platform, marketplace, or supply chain in minutes

Plug & Play Partner Integration Headless Commerce Open Source