x402 merchant
Eckari$0.001 / callapi.eckari.com
ParcelTrackingCarrierLogisticsShipping

Identify which carrier issued a tracking number using a deterministic, versioned signature set - prefixes, lengths, carrier check digits and UPU S10 structure - returning the carrier, how distinctive the match is, every ranked candidate with typed evidence, and the parsed S10 details. No upstream call and no carrier account required. Use when: Which carrier is this tracking number from?

MerchantReport

0x9d6b…3c8f

0x9d6b6fdb04040a55d58b24ff4c90c08cf6083c8fExplorer
Inbound volume
$0.13
Last 7d vs prior 7d
Settlements
34
Last 7d vs prior 7d
5
Distinct counterparties

Chains: Base (34)

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
0x7b21…f448$0.00$0.08244d agoGraph
0xc59e…98dc$0.00$0.0365d agoGraph
0x11e4…3912$0.00$0.007214d agoGraph
0xc533…2d7a$0.00$0.00312d agoGraph
0x4511…0ae2$0.00$0.002114d 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
0xc533…2d7a0x9d6b…3c8fBase$0.003100%coinbase2d ago0x7d72af…fce2e1
0x7b21…f4480x9d6b…3c8fBase$0.003100%coinbase4d ago0x77cbef…8292a3
0x7b21…f4480x9d6b…3c8fBase$0.003100%coinbase4d ago0xdf4396…b45dfe
0x7b21…f4480x9d6b…3c8fBase$0.001100%coinbase4d ago0x43609d…a899e7
0x7b21…f4480x9d6b…3c8fBase$0.003100%coinbase4d ago0x094055…8baff3
0x7b21…f4480x9d6b…3c8fBase$0.003100%coinbase4d ago0xe7cd7b…1c4cbc
0x7b21…f4480x9d6b…3c8fBase$0.003100%coinbase4d ago0xc314bd…8c497b
0x7b21…f4480x9d6b…3c8fBase$0.002100%coinbase4d ago0x2aa131…e535c8
0x7b21…f4480x9d6b…3c8fBase$0.003100%coinbase4d ago0xd16c8e…ce3641
0x7b21…f4480x9d6b…3c8fBase$0.004100%coinbase4d ago0x6769af…448759
0x7b21…f4480x9d6b…3c8fBase$0.004100%coinbase4d ago0x66df23…96c5df
0x7b21…f4480x9d6b…3c8fBase$0.002100%coinbase4d ago0x3c174c…5b0079
0x7b21…f4480x9d6b…3c8fBase$0.002100%coinbase4d ago0x0b6d2c…92d1b8
0x7b21…f4480x9d6b…3c8fBase$0.004100%coinbase4d ago0xcc3dc8…93fff0
0x7b21…f4480x9d6b…3c8fBase$0.003100%coinbase4d ago0xd43c3e…bb2d42
0x7b21…f4480x9d6b…3c8fBase$0.005100%coinbase4d ago0xbaca14…7db069
0x7b21…f4480x9d6b…3c8fBase$0.003100%coinbase4d ago0x26159b…48d5f7
0x7b21…f4480x9d6b…3c8fBase$0.002100%coinbase4d ago0x3b5296…8456de
0x7b21…f4480x9d6b…3c8fBase$0.004100%coinbase4d ago0x308dd5…3e11a9
0x7b21…f4480x9d6b…3c8fBase$0.003100%coinbase4d ago0x9b99a3…724f45
0x7b21…f4480x9d6b…3c8fBase$0.008100%coinbase4d ago0x957eef…c76b6f
0x7b21…f4480x9d6b…3c8fBase$0.005100%coinbase4d ago0xf96e2f…2403ce
0x7b21…f4480x9d6b…3c8fBase$0.005100%coinbase4d ago0xebb469…eb08b3
0x7b21…f4480x9d6b…3c8fBase$0.006100%coinbase4d ago0x02464f…a5ecef
0x7b21…f4480x9d6b…3c8fBase$0.003100%coinbase4d ago0x1721f8…e1d0d0

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will check 0x9d6b…3c8f's payment record before paying it over the free read API. No key, no account.

GET www.roundhouse.studio/api/v0/merchants/0x9d6b6fdb04040a55d58b24ff4c90c08cf6083c8f

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: 0x9d6b6fdb04040a55d58b24ff4c90c08cf6083c8f

curl -s 'https://www.roundhouse.studio/api/v0/merchants/0x9d6b6fdb04040a55d58b24ff4c90c08cf6083c8f'
curl -s 'https://www.roundhouse.studio/api/v0/entities/0x9d6b6fdb04040a55d58b24ff4c90c08cf6083c8f/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.