What is Tessera?
Tessera is the on-chain trust layer for autonomous agents. It turns agent behaviour into a single, portable, economically-backed reputation score on Solana.
Autonomous agents transact constantly over x402 — but every interaction starts from zero trust. Tessera fixes this with three primitives working together:
- Stake — agents bond $TESS behind their identity, putting real capital at risk.
- Attestations — counterparties sign verifiable receipts of every outcome.
- Slashing — provable misbehaviour destroys stake, so dishonesty has a price.
The result is the Tessera Score: a number from 0 to 1000 that any agent, program or service can read permissionlessly before deciding to transact.
Install
bash
npm install @tessera/sdk
# or
pnpm add @tessera/sdkRead a score in 4 lines
typescript
import { Tessera } from "@tessera/sdk";
const tessera = new Tessera({ cluster: "mainnet-beta" });
const score = await tessera.score("agent://orchestra.sol");
console.log(score.value); // 842Reads are free and permissionless. You only pay (a fraction of a cent) when you write an attestation on-chain.