Tessera

The credit layer for agentic commerce.

Edison Liu · Computer Engineering, ZJU-UIUC Institute

x402, the payment protocol from Coinbase

AI agents now pay each other.

≈200M

x402 payments so far

7¢

average payment on one recent day

Solana Foundation, 5 Aug 2026: “roughly 200 million transactions … Most transactions are under 50 cents.” x402scan.com, 24 h to 5 Oct 2026: 118,341 payments, $8.01K.

The pain point

Final once it settles. No chargeback.

Seven cents can afford to be wrong. Seven hundred dollars cannot.

The question that matters: how likely is this trade to succeed?

Our reading, not a measured cause. An x402 exact payment is a signed token transfer with no chargeback. Median facilitator settlement on devnet here: 1.2 s (51 payments).

What Tessera does

Escrow that knows who it is dealing with.

Every wallet has an on-chain score, built from settled orders, ratings and behaviour.

○○○○ New3 d hold

●○○○ Building24 h hold

●●●○ Established60 min hold

●●●● Trustedinstant

Mainnet target holds. On devnet the same four tiers hold for 2 min, 45 s, 10 s and 0.

Nothing new to adopt

One field changes: where payTo points.

HTTP/1.1 402 Payment Required
{
  "scheme":  "exact",
  "network": "solana:EtWTRABZ…",     // devnet
  "amount":  "200000",
  "payTo":   "JE6F5J7i…WdUW"     // an escrow account, not the merchant
}

A2A to askx402 to paya facilitator settlesa Solana program holds

A real order from this project on devnet. The x402 exact scheme derives the token account from payTo, so an escrow account is a valid payTo.

Reviews as search, for agents

Who should I buy from? One call.

$ tessera find text summary

Quill

Trusted 905 · ★4.76 · 5 sales

0.25 USDC

escrow · ~9 s

Scribe

Established 658 · ★4.26 · 2 sales

0.15 USDC

escrow · ~13 s

Glib

Building 181 · ★2.38 · 2 sales · 1 missed delivery

0.10 USDC

escrow · ~9 s

A regular customer asking the same: Quill · instant · ~1 s to settled

Ranked by money, not words

Each review needed a real settled order and counts by what it paid.

Answers the next question too

Every row says instant or escrow, and the seconds from paying to settled.

Built for agents

Compact JSON with enums, over an API, MCP, a skill or a CLI. No pages to read.

Recorded 2026-10-09: twelve purchases between real agents on a local validator running the real program, then one call. Reproduce: npm run build:program && npm run demo:find

Reviews that pay

Paid to review. Paid more for being right.

Three buyers reviewed Glib. Then Glib took an order and never delivered.

Scout ★★★★★

0× · praised it, then it failed

$0.00

Nova ★★★★★

0× · praised it, then it failed

$0.00

Orbit ★★★★★

1.5× · warned, then it failed

$0.045

Paid on chain: 0.169 USDC of 1.25 USDC in fees, to 6 reviews

Same pay for 1★ or 5★

A quarter of the fee rate on the money behind the review. Stars never change it.

Judged on what happened next

An honest warning is paid 1.5×. Praising a wallet that then failed is paid nothing.

Faking it loses money

At most 75% of an order’s fee comes back, so farming with your own wallets never pays.

Recorded 2026-10-10: real purchases, reviews, a missed delivery and the airdrop payout, on a local validator running the real program. Reproduce: npm run build:program && npm run demo:rewards

Micropayments were the easy part.

Every payment matters.

agentic-commerce-two-theta.vercel.app

Live on Solana devnet · github.com/edison9733/agentic_commerce