Crypto Microdata for Agents (x402)

A zero.xyz agent has been proven to re-buy Hyperliquid volume and top movers about every 20 minutes at $0.003. AgentCash / x402 MCP clients: 1) mcp__agentcash__discover_api_endpoints("https://kr-x402-mvp.kgy5612.workers.dev") 2) mcp__agentcash__check_endpoint_schema on the route you pick 3) mcp__agentcash__fetch (paid 200 arrives as {success,data}: read .data.verdict / .data.next). Task routing, start here: will this Base tx revert or drain me? /crypto/simulate $0.003 (cheaper pre-check: /crypto/decode-calldata $0.002). Who is crowded / liquidation risk? /crypto/liquidations?coin=BTC $0.003. ENS/basename to address: /crypto/ens?name= $0.002. Gas before a send: /crypto/base-gas $0.001 (multichain: /crypto/gas-price $0.002). Price: /crypto/prices $0.003. Should my agent buy this token? /crypto/token-risk $0.008. Upstream-named paths work too: /api/coingecko/price, /api/hyperliquid/funding, /api/tenderly/simulate, /api/kyberswap/quote, /api/goplus/token-security. If nothing here matches your task, switch origin. Pay-per-call crypto + Base on-chain microdata for trading/onchain agents. No API key, no signup: GET a route, read 402 PAYMENT-REQUIRED, sign USDC (EIP-3009) on Base, retry with PAYMENT-SIGNATURE. Funnel: 1) GET /crypto/ping ($0.001) to test your x402 client; 2) /crypto/base-gas ($0.001, cheapest live Base gas) before any Base tx, /crypto/gas-compare ($0.002: which EVM chain is cheapest right now, Base/Ethereum/Arbitrum/Optimism/Polygon/BSC gas in USD per transfer/ERC-20/swap, cheapest first; 2.5x cheaper than $0.005 gas-compare APIs), /crypto/prices ($0.003, median of 4-5 venues), /crypto/market-pulse ($0.004: prices+funding+kimchi+Fear&Greed+regime in one call); 3) /crypto/positioning?coin=BTC ($0.003: are longs or shorts crowded? open interest + change, long/short ratio, liquidations long vs short, taker flow, funding OKX+Hyperliquid, verdict LONGS_CROWDED..SHORT_SQUEEZE_RISK; replaces 3 separate $0.006-0.007 calls), /crypto/funding-signal ($0.006: cross-venue funding Hyperliquid+OKX+Gate+dYdX, signal EXTREME_LONG..EXTREME_SHORT, best funding-arb pair), /crypto/hl-book?coin=BTC and /crypto/hl-funding ($0.005) for perps; 4) /crypto/token-risk?address=0x... ($0.008) answers 'should my agent buy this Base token?' with verdict OK|CAUTION|AVOID, should_buy, can_sell, reasons, /crypto/erc20-balance?token=&wallet= ($0.003), /crypto/wallet-snapshot?wallet= ($0.003, ETH+USDC+gas readiness in one call), /crypto/eth-balance?wallet= ($0.002), /crypto/allowance?owner=&spender= ($0.002: ERC-20 approval check on Base, unlimited flag, exposure = min(allowance, balance), known-spender label, revoke calldata; pass amount= for can_spend; cheaper than $0.003 allowance APIs), /crypto/tx-status?hash=0x.. ($0.002: did this Base tx succeed, who paid whom how much USDC, confirmations; pass expect_to=&expect_usdc= to verify a payment), /crypto/candles?symbol=BTC&interval=1h ($0.002: OHLCV klines + EMA20/50, RSI14, ATR14, trend and pullback zone; Binance>OKX>Hyperliquid>Coinbase>Kraken fallback, 3.75x cheaper than $0.0075 candle APIs), /crypto/perp-movers ($0.003: whole-market Hyperliquid scanner, top gainers/losers, funding extremes, OI/volume leaders, breadth; replaces 7 ranking calls), /crypto/kimchi-premium ($0.002), /crypto/prediction-markets?q=bitcoin ($0.003: live Polymarket odds as implied probabilities, 24h volume, liquidity, 1d move; 2.5x cheaper than $0.0075 prediction-market APIs, 404 = no match = not charged), /crypto/market-risk ($0.002: is anything breaking? ONE 0-100 market-stress score low|moderate|elevated|high from 5 legs: stablecoin peg+flows, BTC move+perp breadth, leverage/funding extremes, BTC volatility, Fear&Greed; returns main_driver, action and suggested_max_leverage; covers derivatives+sentiment that stablecoin-only risk scores skip), /crypto/global-market ($0.002: total crypto market cap, 24h volume, BTC/ETH dominance, DeFi TVL, total stablecoin supply + 1d/7d flow, Fear&Greed and a risk_on/risk_off regime in ONE call; cheaper than $0.003 market-cap-only APIs), /crypto/eth-rpc ($0.002: keyless Ethereum mainnet JSON-RPC, same batch-10 rules, 5x cheaper than ~$0.01 mainnet RPC APIs), /crypto/base-rpc ($0.002: keyless Base JSON-RPC, GET or POST, batch up to 10 calls per payment, 7-RPC failover; 2.5x cheaper than $0.005 x402 RPC gateways, up to 25x cheaper batched), /crypto/swap-quote?from=USDC&to=WETH&amount=10 ($0.003: best-route Base swap quote over 100+ DEX pools, cost %, gas USD, verdict, and with wallet= a ready-to-sign tx + approval check; quote first instead of paying flat $0.05 swap execution fees), /crypto/x402-recommend?need= ($0.003: which x402 API should I pay for this task? ranked by real 24h settled buyers on x402scan + matching routes here, then hands off to x402-check; 3.3x cheaper than $0.01 recommenders), /crypto/x402-check?url= ($0.002: should my agent pay this x402 endpoint? live unpaid probe of ANY x402 URL: decodes the 402 quote, real USD price, network, USDC-or-not asset, payTo EOA/contract + its Base USDC balance, scheme, timeout, Bazaar schema, latency, risk flags, verdict SAFE_TO_PAY|CAUTION|AVOID and within_budget for max_usd=; live check, not stored evidence, and 5x cheaper than $0.01 endpoint-recommendation APIs), /crypto/x-search?q= ($0.003: live X/Twitter posts + sentiment signal, for agents that cannot read X), /crypto/tx-simulate?from=&to=&data= ($0.003: pre-sign Base tx simulation, will it revert + why, exact token/ETH balance changes per address, approvals granted, gas in USD, verdict SAFE_TO_SEND|CAUTION|WILL_REVERT; batch approve+swap in one call; 40% cheaper than $0.005 simulation APIs), /crypto/contract-info?address=0x.. ($0.002: what is at this address on Base/Ethereum? EOA vs contract vs 7702 wallet, ERC20/721/1155/Safe/proxy kind, token metadata, EIP-1967 implementation+admin, owner/renounced, risk flags; one call instead of three), /crypto/ens-resolve?name=vitalik.eth ($0.002: ENS + Basenames both ways, verified flag, profile records; 15x cheaper than $0.03 ENS APIs; alias /crypto/ens), /crypto/chain-rank ($0.003: which chain is growing or shrinking, 12 chains ranked by DEX volume + TVL momentum), /crypto/defi-tvl ($0.002: total + per-chain DeFi TVL with 1d/7d/30d flow, chain rank, protocol TVL, RISK_ON/OFF; one call instead of two $0.003 TVL/overview calls), /crypto/fear-greed ($0.001: Crypto Fear & Greed now + 30d history, 1d/7d/30d change, 7d/30d avg, streak, zone, contrarian signal; same price as bare-number F&G APIs, 5x cheaper than $0.005 ones), /crypto/stablecoin-peg ($0.001: is USDC/USDT/DAI on peg in bps, DEPEG alerts, stablecoin supply flow 1d/7d/30d = risk-on/off, Base supply). Every unpaid 402 also returns the accepts[] terms inline in the JSON body plus a free sample link. Try before you pay: add ?sample=1 to ANY paid route for a free static example of its exact JSON shape. Failed calls (4xx/5xx) are never charged (settlement only on 200). Every paid 200 carries a receipt.url (also X-Receipt-URL header): re-fetch that exact result free for 24h if your client drops the response. Free: /health, /openapi.json, /llms.txt, /catalog, /status, /known-answers (exact input + pass criteria for paid known-answer monitoring of every route). Polling gas? /crypto/gas-compare (also /api/v1/gas/compare, /crypto/cheapest-chain) is 30s-fresh at $0.002.

Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here B+, 96.5/100), which weighs availability, conformance, card completeness and speed. How the two differ

Compared with peers

Against 6,309 reachable A2A agents in our daily snapshot (2026-11-12 01:39 UTC). Display only; it does not change search order.

Readiness

Higher than 80% of peers

This listing 74 · peer median 54

Latency

Faster than 77% of peers

This listing 249 ms · peer median 398 ms

How many agent tools actually work · All statistics

Skills

• /crypto/tx-simulate
  before signing or broadcasting a tx: will it revert and why, exact token/ETH balance changes, approvals granted, gas in USD
  simulatetx-simulatesimulationrevert-reasonpre-signtransaction-simulation
• /crypto/ens-resolve
  before sending funds to a human-readable name, or to label a wallet: ENS / Basename to address and back, verified flag, profile records
  ensens-resolveens-lookupreverse-ensbasenamebasenames
• /crypto/positioning
  before opening or adding to a leveraged perp: are longs or shorts crowded? open interest + 1h/4h/24h change, long/short account ratio, liquidations long vs short, taker buy/sell, funding (OKX + Hyperl
  liquidationsopen-interestlong-short-ratiofunding-ratesperpspositioning
• /crypto/base-gas
  right before sending any Base transaction
  gasgas-oraclegas-priceeip-1559fee-estimatemaxFeePerGas
• /crypto/token-risk
  before buying any Base token: should_buy / can_sell verdict
  honeypottoken-riskrug-checkshould-buytoken-securitytoken-verdict
• /crypto/swap-quote
  before any swap or token buy on Base: best route over 100+ DEX pools, all-in cost %, verdict, and with wallet= a ready-to-sign tx + approval check
  swap-quoteswapdex-aggregatorbest-pricebasedex
• /crypto/defi-tvl
  where is DeFi money moving? total + per-chain TVL with 1d/7d/30d flow, chain rank/share, protocol TVL by slug, RISK_ON/RISK_OFF in one call
  defillamatvldefi-tvldefichain-tvltotal-value-locked
• /crypto/ping
  first call: verify your x402 client works ($0.001)
  x402-testpayment-testpingtestheartbeatx402

How to call

https://kr-x402-mvp.kgy5612.workers.dev/mcp

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