Technology

ERC-8004 infrastructure

The agent network.

Six agent services with on-chain identity (ERC-8004) on Base Sepolia, tracked reputation and callable skills — reachable over REST, MCP and A2A behind an API key. Per-call USDC metering (x402) is designed, not enabled.

Agent services
6
Agent services
Registered on-chain
5
Registered on-chain
Network
Base Sepolia
Network
Required to invoke
API key
Required to invoke

Agent registry

Six agent services.

Registered agents carry their capabilities and wallet on-chain. Skills are callable with an API key today; per-call settlement through the verification escrow is not enabled. The cards below are a reviewed snapshot of the four agents registered in July 2026.

Agent #1

Registered

Sage

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-8004SoulboundRead-OnlyMulti-chain

Agent #2

Registered

Verification

5-signal NFC verification pipeline

  • verification__verify_nfc_scan

    5-signal NFC verification

    $0.01 USDC

Signal weights

  • NFC Tag UID30%
  • Owner Wallet25%
  • Lifecycle State20%
  • Geolocation15%
  • Timestamp10%

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

NFC Pipelinex402 PaidECDSA OracleMulti-chain

Agent #3

Registered

Anomaly

5-detector fraud detection

  • anomaly__analyze_scan

    5-detector fraud analysis

    $0.05 USDC

Detector weights

  • Velocity25%
  • Geo Anomaly25%
  • State Progression20%
  • Timing Pattern15%
  • Reputation15%

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

Fraud Detectionx402 Paid5 DetectorsMulti-chain

Agent #4

Registered

Recovery

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

Verdicts: quarantine · monitor · clear

AIRP Protocolx402 PaidMulti-AgentMulti-chain

Agent #5

Registered

Product

Read-only catalog and pricing lookups for physical-asset digital twins

  • product__get_product

    Public product record by tokenId, or by GTIN and serial

    Free

  • product__get_asset_price

    Public price of an asset by tokenId

    Free
Read-onlyMCP ToolsVisibility-gated

Agent #6

Mesh only

Logistics

CarrierAgent: shipment tracking across carriers (demo and UPS), normalized for the mesh

  • logistics__track_shipment

    Normalized status, ETA and event timeline of a shipment

    Free

  • logistics__list_carriers

    Carrier adapters this agent can query and whether each is configured

    Free
CarriersUPS Track APIBeta

Protocol surface

One gateway, three protocols.

The agents are services behind api.tagit.network with on-chain registry records. The agent card and the directory are public; invoking a skill takes an API key.

Since 2026-09-14 the gateway publishes an A2A agent card at GET /.well-known/agent.json and a directory at GET /api/v1/agents, both public, and accepts POST /api/v1/agents/:id/invoke, POST /mcp and POST /a2a with an API key (401 without one; probed 2026-10-23). The USDC prices on each skill are registry metadata, not a live paywall: nothing accepts payment for a skill today, and the x402 handshake on POST /verify does not settle payments on the test network.

The gateway at api.tagit.network answers 401 on every path not listed here. The routes this site publishes, with what an unauthenticated caller receives:

  • GEThttps://api.tagit.network/healthLiveness and per-agent health — public
  • GEThttps://api.tagit.network/.well-known/agent.jsonA2A agent card: six services, twelve skills — public
  • GEThttps://api.tagit.network/api/v1/agentsAgent directory — public
  • POSThttps://api.tagit.network/api/v1/agents/:agentId/invokeInvoke a skill — API key
  • POSThttps://api.tagit.network/mcpMCP server, twelve tools — API key
  • POSThttps://api.tagit.network/a2aA2A task dispatch — API key
  • POSThttps://api.tagit.network/verifyAsset verification — answers 402 with x402 terms, no key

To read an agent record, call the ERC-8004 registry contracts on Base Sepolia directly — see the deployment registry below.

On-chain infrastructure

Deployment registry.

Every contract behind the agent network, verified on Base Sepolia. Addresses link to the block explorer.

ContractAddressChain
TAGITAgentIdentity0x0611FE60f6E37230bDaf04c5F2Ac2dc9012130a9Base Sepolia
TAGITAgentReputation0x32be6C82A57d5bCe897538d7dA4109eA0eeB0aA1Base Sepolia
TAGITAgentValidation0x34766dBa7040C2c8817f1Ee1e448209826DD607eBase Sepolia
TAGITCore (proxy)0x3aDc7EFDb58Ae85483eFf5D4966D916185f31d1DBase Sepolia
TAGITAccess0xb56A1D91995C212342FaA843468F03521340A1D6Base Sepolia
IdentityBadge0xebdAC9A0663c02a7297681b078aaD893EF345030Base Sepolia
CapabilityBadge0xb05d22706B08A3F6409601de520cf7A6dbCB573dBase Sepolia
TAGITPaymaster0x6fFFa92efb419E812d5c9C9D0c1B1a0f5c6fFd1CBase Sepolia
RoboticAuthorizer0x5C38684d87e826589Ec5Ed401D94C9671caE9f40Base Sepolia
VerificationEscrow0x4c9aACfcb64169E3BC187c227c4C0e0a5CFDA1cFBase Sepolia
ReputationStaking0x4154af74DA2B3a98096317100296966Ade15574ABase Sepolia
TimelockController0xfdA2478dB73064eF770f4e5E5b97BC83801126e1Base Sepolia

OP Sepolia and Arbitrum Sepolia deployments were retired 2026-06-27; history lives in tagit-contracts. Mainnet is audit-gated, targeted H1 2027.

Build against the network.

Query live agents from the registry, or read the contract suite the network settles on.

View Live RegistryContract Suite