x402 merchant

kr-x402-mvp.kgy5612.workers.dev

Name: kr-x402-mvp.kgy5612.workers.dev on x402: dated readings
Creator: Sato Hub
License: https://creativecommons.org/licenses/by/4.0/

Onchain data API on Base, paid per request with x402.

Endpoints29
Price per requestfrom $0.001
Outside payers · 7d3
Answer 402n/a

Overview

as of 2026-10-30

Seller wallet: 0xe4be4d0bd82d8e68203deff81f79ede0529f2617
Chains: Base
Hosts: kr-x402-mvp.kgy5612.workers.dev
Categories: Onchain data14Market data12Developer tools2Web data1
First seen: 2026-10-30 · last seen 2026-10-30

What we observed

Paid by 3 outside payers · 7d2026-10-30402 unknownNot claimed

See the readings

Endpoints

29 registered

https://kr-x402-mvp.kgy5612.workers.dev/crypto/base-gas
Base gas oracle for agents sending Base txs: EIP-1559 slow / standard / fast tiers (maxFeePerGas + maxPriorityFeePerGas in gwei and wei hex, from eth_feeHistory 20 blocks p10/p50/p90), base fee, congestion 0-1, recommen…
BaseOnchain data
$0.001/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/fear-greed
Crypto Fear & Greed Index with context, not just a number: value 0-100 + label now, previous reading, 1d/7d/30d change, 7d and 30d average, min/max 30d, streak (days in current zone), trend rising|falling|flat, contrari…
BaseMarket data
$0.001/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/ping
Paid heartbeat: cheapest way to test your x402 client end-to-end on Base USDC. Returns {ok:true,t,next}.
BaseDeveloper tools
$0.001/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/stablecoin-peg
Is USDC / USDT / DAI / USDe holding its $1 peg, and is stablecoin liquidity growing (risk-on) or shrinking (risk-off)? Top USD stablecoins: price, peg deviation in bps, status OK|DRIFT|WARN|DEPEG, Kraken cross-check for…
BaseOnchain data
$0.001/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/allowance
ERC-20 approval check on Base: how much can spender move from owner? owner=0x..&spender=0x..[&token=0x.., default USDC][&amount=] -> allowance, unlimited flag, owner balance, exposure (min of allowance and balance), kno…
BaseOnchain data
$0.002/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/base-rpc
Pay-per-call Base mainnet JSON-RPC, no API key, no account: GET ?method=eth_call&params=[...] (params = URL-encoded JSON array) or POST a standard JSON-RPC body. POST a batch of up to 10 calls for ONE $0.002 payment (vs…
BaseOnchain data
$0.002/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/candles
OHLCV candlesticks (klines) for any major USDT pair with indicators precomputed, so your trading agent skips the math: symbol=BTC|ETH|SOL|BNB|XRP|DOGE|ADA|AVAX|LINK|SUI|... (or BTCUSDT), interval=1m|5m|15m|1h|4h|1d (def…
BaseMarket data
$0.002/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/decode-calldata
What am I about to sign? Pre-sign calldata decoder for Base: data=0x.. (selector+args) [&to=0x.. token/contract for symbol+decimals] or hash=0x.. (decode an existing tx). Resolves the 4-byte selector (builtin + openchai…
BaseOnchain data
$0.002/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/defi-tvl
DeFi TVL in ONE call (others sell TVL and DeFi overview as two $0.003 calls): total DeFi TVL with 1d/7d/30d % change and flow inflow|flat|outflow, signal RISK_ON|NEUTRAL|RISK_OFF, top chains ranked by TVL with share %, …
BaseOnchain data
$0.002/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/eth-balance
Live native ETH balance + nonce for a wallet on Base: wallet=0x..
BaseOnchain data
$0.002/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/eth-rpc
Pay-per-call Ethereum mainnet (chain 1) JSON-RPC, no API key, no account, paid in Base USDC: GET ?method=eth_call&params=[...] or POST a standard JSON-RPC body; POST a batch of up to 10 calls for ONE $0.002 payment (vs …
BaseOnchain data
$0.002/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/gas-compare
Which EVM chain is cheapest to execute on right now? Live gas price on Base, Ethereum, Arbitrum, Optimism, Polygon and BSC, converted to USD per native transfer (21k gas), ERC-20 transfer (65k) and swap (150k), sorted c…
BaseOnchain data
$0.002/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/global-market
Whole-crypto-market context in one call: total crypto market cap (USD) and 24h change, 24h trading volume, Bitcoin (BTC) and Ethereum (ETH) dominance, altcoin share, DeFi TVL across all chains, total USD stablecoin supp…
BaseMarket data
$0.002/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/kimchi-premium
Live Korea kimchi premium: Upbit KRW vs global USD (median of Coinbase, Kraken, Bitstamp) for BTC and ETH, plus USD/KRW FX. Korea crypto arb/sentiment signal. Optional symbols=BTC,ETH filter. Alias: /kr/kimchi-premium.
BaseMarket data
$0.002/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/market-risk
Is anything breaking in crypto right now? One composite 0-100 market-stress score (low|moderate|elevated|high) with a per-leg breakdown: stablecoins (worst USDC/USDT/DAI peg deviation in bps + 7d supply flow), price & b…
BaseMarket data
$0.002/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/perp-movers
Whole-market perp scanner (all ~200 Hyperliquid perps) in one call: top_gainers, top_losers, top_volume, top_open_interest, highest_funding (crowded longs), most_negative_funding (crowded shorts / squeeze candidates), u…
BaseMarket data
$0.002/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/tx-status
Did this Base transaction succeed, and who paid whom? hash=0x.. (64 hex) -> status success|failed|pending, block, confirmations, timestamp, from, to, ETH value, gas used + fee in ETH, method (transfer / approve / transf…
BaseOnchain data
$0.002/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/x402-check
Should my agent pay this x402 endpoint? Live pre-payment check of ANY x402 URL (never pays it): we GET the target unpaid and decode its 402 quote (PAYMENT-REQUIRED header for v2, JSON body for v1) -> x402 version, every…
BaseDeveloper tools
$0.002/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/erc20-balance
Live ERC-20 balance on Base: token=0x..&wallet=0x.. -> balance (decimals applied), raw, symbol, block.
BaseOnchain data
$0.003/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/prediction-markets
Live prediction-market odds (Polymarket) as clean implied probabilities, so your agent can price events: q=bitcoin|ethereum|solana|fed|election|any keyword (default crypto), limit=1-20 events (default 8), markets=1-20 p…
BaseMarket data
$0.003/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/prices
Spot USD prices: median of Coinbase, Kraken, Bybit, Binance, CoinGecko (whichever respond) with n_sources, dispersion_bps, with 24h change/volume. symbols=BTC,ETH,SOL default; also BNB,XRP,DOGE,ADA,AVAX,LINK,SUI.
BaseMarket data
$0.003/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/swap-quote
How much will I get, and what do I sign? Best-route swap quote on Base for any token pair: from=USDC|ETH|WETH|cbBTC|DAI|AERO|DEGEN|BRETT|VIRTUAL or 0x.. &to=..&amount=10 (human units) [&wallet=0x.. for ready-to-sign cal…
BaseOnchain data
$0.003/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/wallet-snapshot
One-call Base wallet quick check (agent self-check or counterparty/payee check before you pay): native ETH + nonce + USDC balance + live gas cost of an ERC-20 transfer, and can_pay_gas / can_pay_x402 booleans. Cheaper t…
BaseOnchain data
$0.003/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/x-search
Live X (Twitter) search for agents that cannot read X: q=keyword|$TICKER|from:handle (X search operators ok), limit=1-20 (default 10), lang=en|ko|.., sort=recency|relevancy. Returns posts [{id,url,text,author{handle,nam…
BaseWeb data
$0.003/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/market-pulse
One-call crypto market regime for trading agents: BTC/ETH/SOL median spot + 24h change, Hyperliquid funding APR + open interest, Korea kimchi premium, Crypto Fear & Greed index, and a regime label (risk_on|neutral|risk_…
BaseMarket data
$0.004/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/hl-book
Hyperliquid perp L2 top-of-book for coin=BTC|ETH|SOL: best bid/ask, mid, spread_bps, top N levels (depth=1-20, default 5).
BaseMarket data
$0.005/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/hl-funding
Hyperliquid perp funding (hourly + APR), open interest (coins + USD), mark/oracle/mid px, 24h volume for BTC, ETH, SOL. Optional coin=BTC.
BaseMarket data
$0.005/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/funding-signal
Cross-exchange perp funding in one call: Hyperliquid + OKX + Gate + dYdX (+ Bybit/Binance/Bitget when reachable) funding APR per coin (BTC/ETH/SOL), mean APR, positioning signal EXTREME_LONG|LONG_HEAVY|NEUTRAL|SHORT_HEA…
BaseMarket data
$0.006/ request
2026-10-30
https://kr-x402-mvp.kgy5612.workers.dev/crypto/token-risk
Should your agent buy this Base token? Half the price of $0.02 AI token-verdict quests, deterministic on-chain checks instead of an LLM opinion. One-call verdict OK|CAUTION|AVOID + should_buy + can_sell + plain-English …
BaseOnchain data
$0.01/ request
2026-10-30

Evidence

as of 2026-10-30

Answers HTTP 402

unknown

unknown. We hold no reading for this seller's endpoints.

no reading date

x402-style payments, last 7 days (Base)

3outside payers

81 x402-style payments from 3 distinct payers, $0.25 USDC in the last 7 days (Base, exact read)

window ended 2026-10-30

Payments: 81
Payers: 3
USDC: 0.25

This window shows the pattern of machine noise (few payers, dust amounts), so it does not count toward the evidence ranking.

All USDC received at this payout address: $0.25 (includes payments that are not x402)

Reading: x402-style payments to this payout address on Base, exact read of the 7 days to 2026-10-30, every block of the window: counted when the transaction carries a signed USDC authorization (EIP-3009), the settlement x402's `exact` scheme uses. Some non-x402 gasless sends use it too; Sato Hub's own payer wallets are left out

By chain

Chain	Seller wallet	Endpoints	Answers 402	x402-style payments
Base	0xe4be4d0bd82d8e68203deff81f79ede0529f2617	29	unknown	81 x402-style payments from 3 distinct payers, $0.25 USDC in the last 7 days (Base, exact read)

One seller wallet, each chain read on its own. We never send a payment, so we never observe what a paid call returns. Unknown means we hold no reading, not that anything failed.

Pricing

Lowest

$0.001

per request, as registeredas of 2026-10-30

Median

$0.002

per request, as registeredas of 2026-10-30

Highest

$0.01

per request, as registeredas of 2026-10-30

The price each endpoint registered in the x402 catalogue. A listed price is a registration, not an observed charge.

Claim this merchant

Sign a message from the payout address 0xe4be4d…9f2617 to claim this page or download its payment ledger. Claiming proves control of the payout key. It says nothing about the service behind the address, and it does not change how this merchant is ranked. No email, no account: the signature is the whole credential, and signing a message costs no gas and moves nothing.

Data CC-BY-4.0, attribution: data by satohub.ai. Data: x402-list.com (CC BY 4.0). Data as of 2026-10-30. Appearing here is not an endorsement. Check an endpoint with the doctor.