x402 merchant
China Market Data API$0.005 / callchina-market-data-api.vercel.app ↗
ChinaFxUsdcnyCnh

China FX signal: the onshore USDCNY rate alongside the offshore USDCNH rate, plus the CNH minus CNY spread in pips and basis points. Use this endpoint when an agent needs China FX positioning, RMB depreciation or appreciation pressure, capital-flow stress, or an offshore-versus-onshore arbitrage signal. The onshore/offshore spread is the standard proxy for offshore RMB sentiment and is closely watched around China data releases and policy meetings. Response is English-labeled JSON with last, high, low and quote time for each leg. No signup and no API key: send an HTTP GET, receive HTTP 402 with the price, pay per call in USDC on Base, and the data is returned in the same request cycle.

MerchantReport

0x12e3…5af0

0x12e389124416ddcb4710ce5af43da7445bc35af0Explorer
$0.01
Received
$0.00
Paid out
2
Settlements
2
Distinct counterparties
Over the whole indexed history

Received $0.01 of the $3067.00M Roundhouse has indexed across 1,401,091 wallets — less than 0.0001% of it.

Chains (from the recent scan): Base (2)

Activity

MayJunJulAugSepOctNov
LessMore

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

Frequent counterparties

CounterpartySent to themReceived from themSettlementsLast
0xa1d1…1978$0.00$0.00517d agoGraph
0x9a10…6c92$0.00$0.00518d agoGraph

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

Data quality

50% of observed volume is with a single counterparty, in all 2 observed settlements.

Recent activity

Payer PayeeChainAmountx402RouteAgeTxn hash
0xa1d1…19780x12e3…5af0BaseBase$0.005100%payAI7d ago0xd02c2d…46a68d
0x9a10…6c920x12e3…5af0BaseBase$0.005100%payAI8d ago0x042b96…4d729b

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will check 0x12e3…5af0's payment record before paying it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/merchants/0x12e389124416ddcb4710ce5af43da7445bc35af0

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: 0x12e389124416ddcb4710ce5af43da7445bc35af0

curl -s 'https://api.roundhouseai.io/v0/merchants/0x12e389124416ddcb4710ce5af43da7445bc35af0'
curl -s 'https://api.roundhouseai.io/v0/entities/0x12e389124416ddcb4710ce5af43da7445bc35af0/settlements?limit=50'

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.