x402 merchant
x402 research echo$0.001 / callx402-echo-service.onrender.com
x402EchoProtocol-conformanceSecurity-researchAgents

Echo service for x402 protocol research. POST a JSON body with a "message" string; the response returns the message, its SHA-256 digest and a server timestamp. Payment is live: $0.001 USDC on Base is verified and settled via the Coinbase CDP facilitator, so callers ARE charged. The response is computed before settlement, and the settlement tx hash is returned in the body and in PAYMENT-RESPONSE.

MerchantReport

0x9cc7…77ee

0x9cc774a8ed49d89cba1a288f4a050b8f7fba77eeExplorer
Inbound volume
$4.13
Last 7d vs prior 7d
Settlements
36
Last 7d vs prior 7d
9
Distinct counterparties

Chains: Base (36)

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
0x368c…9716$0.00$4.12283h agoGraph
0xc7a2…263e$0.00$0.001111h agoGraph
0xfadd…6c94$0.00$0.001112h agoGraph
0x6937…c403$0.00$0.00114d agoGraph
0x9219…973f$0.00$0.00114d agoGraph
0x8f0f…2656$0.00$0.00114d agoGraph
0xed6f…f3d6$0.00$0.00114d agoGraph
0x823d…e19e$0.00$0.00114d agoGraph

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

Data quality

100% of observed volume is with a single counterparty.

Organic volume $4.13 of $4.13 total.

Recent activity

Payer PayeeChainAmountx402RouteAgeTxn hash
0x368c…97160x9cc7…77eeBase$0.001100%coinbase3h ago0x013569…cb97b1
0x368c…97160x9cc7…77eeBase$0.001100%coinbase3h ago0x260d50…8ab97c
0xc7a2…263e0x9cc7…77eeBase$0.001100%coinbase11h ago0xe98099…cf67e6
0xfadd…6c940x9cc7…77eeBase$0.001100%coinbase12h ago0x1e9c64…d87420
0x368c…97160x9cc7…77eeBase$0.001100%coinbase22h ago0x24ad8f…b5f07e
0x368c…97160x9cc7…77eeBase$0.001100%coinbase22h ago0x76e373…45e88a
0x368c…97160x9cc7…77eeBase$0.001100%coinbase22h ago0xf209e0…5ee904
0x368c…97160x9cc7…77eeBase$0.001100%coinbase22h ago0x1ad7b2…b54d41
0x368c…97160x9cc7…77eeBase$0.001100%coinbase22h ago0xe3de17…85a766
0x368c…97160x9cc7…77eeBase$0.001100%coinbase22h ago0x067866…9d0895
0x368c…97160x9cc7…77eeBase$0.001100%coinbase22h ago0x412470…cb0685
0x368c…97160x9cc7…77eeBase$0.001100%coinbase22h ago0x400bb1…4c06ee
0x368c…97160x9cc7…77eeBase$0.001100%coinbase22h ago0xeab6f7…21fbab
0x368c…97160x9cc7…77eeBase$0.001100%coinbase22h ago0x3a3f30…d4f658
0x368c…97160x9cc7…77eeBase$0.001100%coinbase22h ago0xbfa9df…a3aca1
0x368c…97160x9cc7…77eeBase$0.001100%coinbase22h ago0x7ada94…b35ad3
0x368c…97160x9cc7…77eeBase$0.001100%coinbase22h ago0x29bc8d…c440d0
0x368c…97160x9cc7…77eeBase$0.001100%coinbase22h ago0x15f935…ac1907
0x368c…97160x9cc7…77eeBase$0.001100%coinbase22h ago0xdc77e1…33e529
0x368c…97160x9cc7…77eeBase$0.001100%coinbase22h ago0x11b43e…969103
0x368c…97160x9cc7…77eeBase$0.001100%coinbase22h ago0x0e8fd0…e1d854
0x368c…97160x9cc7…77eeBase$2.50100%coinbase1d ago0x9fcf57…a90a31
0x368c…97160x9cc7…77eeBase$1.00100%coinbase1d ago0x99bcd0…5c8e61
0x368c…97160x9cc7…77eeBase$0.50100%coinbase1d ago0xe2ed3e…212570
0x368c…97160x9cc7…77eeBase$0.10100%coinbase1d ago0xf66c52…95ddfa

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will check 0x9cc7…77ee's payment record before paying it over the free read API. No key, no account.

GET www.roundhouse.studio/api/v0/merchants/0x9cc774a8ed49d89cba1a288f4a050b8f7fba77ee

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: 0x9cc774a8ed49d89cba1a288f4a050b8f7fba77ee

curl -s 'https://www.roundhouse.studio/api/v0/merchants/0x9cc774a8ed49d89cba1a288f4a050b8f7fba77ee'
curl -s 'https://www.roundhouse.studio/api/v0/entities/0x9cc774a8ed49d89cba1a288f4a050b8f7fba77ee/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.