Glossary
Onchain agent glossary
17 terms, each defined by what it is, how it works and what it is not — and each linked to the Sato Hub page that measures it, because a number in a definition goes stale and a page does not.
- ACP job (Virtuals Agent Commerce Protocol)
- A unit of paid work between two agents on Virtuals' ACP: requested, negotiated, funded into escrow, delivered, then evaluated — each step an on-chain state.
- Agent Passport
- A Sato Hub profile and manifest for a running agent, registered by proving control of its wallet key. Self-reported except where a named check says otherwise.
- Agent skill
- A packaged instruction set (typically a SKILL.md plus scripts) an agent loads to gain a capability; installed from registries such as ClawHub or skills.sh.
- Deploy spec / verified install
- A machine-readable install manifest for a listing; the install is verified when Sato Hub re-ran it in an isolated container and it completed.
- ERC-4337 account (smart account)
- A contract wallet whose transactions are UserOperations, sent by bundlers through a shared EntryPoint — programmable validation with no protocol change.
- ERC-7715 permission
- A scoped permission granted by a wallet — spend up to X of Y until T — requested via wallet_grantPermissions and enforced by the wallet's own code.
- ERC-8004 (Trustless Agents)
- An Ethereum standard giving an agent an on-chain identity: an ERC-721 registry entry pointing at its metadata, plus reputation and validation registries.
- Evidence tier
- The label on every agent-economy number saying how it was obtained: 1 proof (read from the contract), 2 indicator (sampled or joined), 3 inference (a proxy).
- Liveness
- Sato Hub's recency label — Active, Recent, Quiet or Dormant — from a listing's latest observed commit, release or post. A maintenance signal, not a risk grade.
- MCP server
- A process that exposes tools, resources and prompts to an AI agent over the Model Context Protocol, so the agent discovers what it can call at connect time.
- Observed success (share of our checks)
- The percentage of Sato Hub's own daily checks of a hosted endpoint that succeeded over a window. It is a record of our checks, never the server's uptime.
- Olas service
- On Olas (Autonolas), a registered composition of agent instances run by bonded operators — the unit that actually runs, as opposed to a single agent.
- SATI (8004-solana)
- A Solana program that ports the ERC-8004 agent-registry model: agent identities as on-chain accounts, readable by anyone without the operator's cooperation.
- Sato Score
- A 0–100 measure of how open, active and verifiable a listed project is, computed daily from evidence. Not a safety, quality or returns grade.
- x402
- An HTTP payment protocol: a server answers 402 with a price, the client pays in stablecoins, and retries the request with proof of payment attached.
- x402 Bazaar
- Coinbase's discovery index of x402-priced resources: sellers register an endpoint and price, and the catalogue is readable without a key.
- x402 facilitator
- A service that verifies an x402 payment payload and submits the settlement transaction on the server's behalf, so the server never touches a chain.