0x9ff02e91b62d07acfadfb13be56f990252ddc59401 · Try it
Pick what the tool sends back.
Assay runs its checks on the response before your agent's payment settles. Choose an outcome and watch the verdict.
Your agent → toolx402
GET /v1/search?q=…
402 Payment Required
price $0.0100 (example)
pay x402 voucher ✓
200 OK · 10 results
Response
A complete, valid response
Every check passes, so the payment settles and the tool is paid.
Assay checks- Deliveredpass
- Matches schemapass
- Price as quotedpass
- Not a duplicatepass
Verdict✓ Charged $0.0100
Illustration of the flow. $0.0100 is an example price.
02 · How it works
Pay. Check. Settle.
Step 1
Your agent pays over x402
The tool quotes a price and the agent pays with an x402 voucher, the same as any paid API call.
Step 2
Assay checks the result
Did it deliver, match the schema, charge the quoted price, and is it new? These checks are mechanical, so they're fast.
Step 3
Charged, or not charged
If it checks out, the tool gets paid. If not, your agent keeps its money, and a tool with stake behind it pays the penalty.
03 · Who it's for
Everyone on both ends of the call.
Stop paying for broken calls.
Your agent spends only on responses that pass the checks, and can read a tool's reliability score before it spends at all.
Buy $ASSAY →Stand behind every response.
Put stake behind your endpoint so agents can choose you with recourse. If a call fails, most of the penalty goes back to the agents who paid.
Buy $ASSAY →Get paid to keep tools honest.
Probers will buy real calls like any customer and report what came back. Reports that match consensus will be paid from protocol revenue.
How probing will work →04 · $ASSAY
The stake behind the checks.
- 01Every prober report will be backed by staked $ASSAY.
- 02Reports against consensus will have their stake slashed.
- 03As part of a gradual rollout, prober slots will be limited.
- 04Payments, refunds and revenue stay in stablecoins. Pay will be for verified work, not for holding.
$ASSAY will launch on PonsLive on Ethereum. Official CA + X only.
0x9ff02e91b62d07acfadfb13be56f990252ddc594
Pay for results, not attempts.
Assay runs on Robinhood Chain testnet and Solana devnet today.