x402 merchant
B20 Check$0.01 / callb20check.com
B20BaseToken-verificationSecurityAttestation

Legitimacy check for B20 tokens on Base. Verifies whether an address is a factory-native B20, detects copycats and known-asset imposters (homoglyph-aware), reports live issuer powers (mint, burn, pause, freeze, seize, admin) and issuer activity, and returns a danger/caution/ok verdict as an EIP-712-signed attestation an agent can independently verify.

MerchantReport

0x26b5…4ba1

0x26b57af5022250f01497f3e19dd537d01d124ba1Explorer
Inbound volume
$0.08
Last 7d vs prior 7d
Settlements
8
Last 7d vs prior 7d
2
Distinct counterparties

Chains: Base (8)

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
0x7e57…2f09$0.00$0.06637d agoGraph
0x4195…314c$0.00$0.02251d agoGraph

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

Data quality

No concentration or self-dealing patterns detected in observed activity.

Recent activity

Payer PayeeChainAmountx402RouteAgeTxn hash
0x7e57…2f090x26b5…4ba1Base$0.01100%Route unknown37d ago0xf480f5…ed179e
0x7e57…2f090x26b5…4ba1Base$0.01100%Route unknown41d ago0xe2576b…76092b
0x7e57…2f090x26b5…4ba1Base$0.01100%Route unknown41d ago0x17cfda…d2a153
0x7e57…2f090x26b5…4ba1Base$0.01100%Route unknown42d ago0xd74ca8…9f54be
0x7e57…2f090x26b5…4ba1Base$0.01100%Route unknown47d ago0x9c70a9…e18be4
0x7e57…2f090x26b5…4ba1Base$0.01100%Route unknown47d ago0xf7eb34…27b759
0x4195…314c0x26b5…4ba1Base$0.01100%Route unknown51d ago0x079256…7063f2
0x4195…314c0x26b5…4ba1Base$0.01100%Route unknown52d ago0x682e3b…a053cb

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will check 0x26b5…4ba1's payment record before paying it over the free read API. No key, no account.

GET www.roundhouse.studio/api/v0/merchants/0x26b57af5022250f01497f3e19dd537d01d124ba1

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: 0x26b57af5022250f01497f3e19dd537d01d124ba1

curl -s 'https://www.roundhouse.studio/api/v0/merchants/0x26b57af5022250f01497f3e19dd537d01d124ba1'
curl -s 'https://www.roundhouse.studio/api/v0/entities/0x26b57af5022250f01497f3e19dd537d01d124ba1/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.