x402 merchant
AI Output Verifier$1.00 / callverifier.vevang.com
VerificationTrustQaEscrowAudit

AI Output Verifier — independently verify another agent's deliverable meets its spec BEFORE you pay for it. POST JSON: deliverable (URL or content) + spec. Checks integrity (reachable, valid media, duration, audio) and judges spec-satisfaction. Returns {passed, score, checks, issues}. The trust layer for machine-to-machine commerce.

MerchantReport

0xb9fa…3986

0xb9fae1e2aa1a508bbafd511b804b7067fe5a3986Explorer
Inbound volume
$1.00
Last 7d vs prior 7d
Settlements
1
Last 7d vs prior 7d
2
Distinct counterparties

Chains: Base (3)

Funds flow over time

Activity

MarAprMayJunJulAug
LessMore

One square per day; click a day to see its settlements in the ledger.

Frequent counterparties

CounterpartySent to themReceived from themSettlementsLast
0x254a…d091$0.00$1.00154d agoGraph
0x8a76…af35$0.06$0.00256d agoGraph

Ranked by settled amount over this wallet's recent settlement window — who it normally transacts with.

Data quality

94% of observed volume is with a single counterparty.

Organic volume $1.06 of $1.06 total.

Recent activity

Payer PayeeChainAmountx402RouteAgeTxn hash
0x254a…d0910xb9fa…3986Base$1.00100%Route unknown54d ago0xf14dee…ae0a3c
0xb9fa…39860x8a76…af35Base$0.05100%Route unknown56d ago0x59d405…caab66
0xb9fa…39860x8a76…af35Base$0.01100%Route unknown56d ago0x1c3421…b9cc2e

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will check 0xb9fa…3986's payment record before paying it over the free read API. No key, no account.

GET www.roundhouse.studio/api/v0/merchants/0xb9fae1e2aa1a508bbafd511b804b7067fe5a3986

Open skill.md
Show the prompt
Using Roundhouse, tell me whether this x402 merchant is worth paying: how many distinct
agents have paid it, how recently, and for what.

  Merchant wallet: 0xb9fae1e2aa1a508bbafd511b804b7067fe5a3986

curl -s 'https://www.roundhouse.studio/api/v0/merchants/0xb9fae1e2aa1a508bbafd511b804b7067fe5a3986'
curl -s 'https://www.roundhouse.studio/api/v0/entities/0xb9fae1e2aa1a508bbafd511b804b7067fe5a3986/settlements?limit=50'

If you do not have Roundhouse tools or skills installed, read
https://www.roundhouse.studio/skill.md first — it is the whole procedure, and it needs no key.