为 Agent 找到值得信任的付费服务

Latest perpetual funding rate, mark price and next funding time for a given Binance symbol, relayed as JSON from the Binance premiumIndex endpoint — POST a symbol such as BTCUSDT. Includes a 3-call free trial per wallet via the X-WALLET header.

Paste an A2A Agent Card URL or inline JSON and this validator checks it against the A2A specification: required fields, skill schemas, endpoint reachability, security schemes and provider transparency. It returns a compatibility score, schema errors, warnings and an Ed25519-signed receipt, paid per call in USDC on Base.

Decode a Base or Ethereum transaction from a hash or raw calldata: decoded function, risk flags such as unlimited token approvals and a risk verdict, with an Ed25519-signed receipt.

European Central Bank daily reference exchange rates for 30+ currencies, any base and quote pair, proxied from the public Frankfurter API. Three free calls per wallet before payment is required.

Audit email deliverability from DNS alone: SPF, DKIM selectors, DMARC strength, BIMI, MTA-STS and MX, returning a 0-100 score and prioritized fixes. Responses are Ed25519-signed; 3 free calls per wallet, then 0.001 USDC on Base.

Get the current crypto Fear and Greed index (0-100) with its classification label, relayed from the public alternative.me feed. POST /service with a JSON limit field; the first 3 calls per wallet are free via the X-WALLET header.

One call snapshots Hyperliquid perpetual futures: mark and oracle price, hourly funding with 8h and APR derivations, open interest, premium and 24h volume across 232 perps, with an Ed25519-signed receipt. 3 free calls per wallet, then 0.001 USDC on Base.

A combined DNS and WHOIS report: A, AAAA, MX, TXT, NS, CNAME, SOA and DNSSEC over DNS-over-HTTPS, registrar and registration/expiry dates via RDAP, plus a 0-100 hygiene score with letter grade. Ed25519-signed, 3 free calls per wallet.

Live Hyperliquid perpetuals data for 230+ assets: open interest, funding (hourly, 8h, APR), mark and oracle price, premium, 24h volume and a crowded long/short signal, plus cross-venue funding versus Bybit and Binance. Ed25519-signed, first 3 calls free.

A multi-asset perpetual futures feed from Hyperliquid: mark and oracle price, open interest, funding with 8h and APR derivations, 24h volume, spread and a directional signal, with optional single-asset detail. Ed25519-signed, with free trial calls via the X-WALLET header.

Machine translation with automatic source-language detection: POST text and a target language code, receive JSON with the translation and an Ed25519 signature. A limited free trial is available per wallet.

Token risk for any contract on Base or Ethereum: a safe, caution, risky or rug_pull verdict combining GoPlus security data (honeypot simulation, buy/sell tax, holder count, ownership flags) with a bytecode scan, owner-renounce check and honeypot.is. Ed25519-signed.

Monitor an EVM contract on Base or Ethereum: current security verdict plus a diff of what changed since the last check — owner, proxy implementation, proxy admin, Sourcify verification, honeypot and tax flags. Ed25519-signed, 0.02 USDC per call on Base.

OHLCV candles — open, high, low, close, volume — for any crypto pair and interval, proxied from Binance public klines. Pay-per-call x402 on Base; the first 3 calls per wallet are free via the X-WALLET header.

Current on-chain USD price for a token on a given chain, sourced from GeckoTerminal — pass a network and a token address. The first 3 calls per wallet are free via the X-WALLET header.

An x402-native blockchain data API covering balances, NFTs, transactions, DEX and pricing across 100+ chains. Pay per request in USDC on Base Sepolia testnet with no API key.

Wallet, DeFi portfolio and on-chain data from Zerion: portfolio summaries, positions and transaction history for any wallet address. Pay per request via x402 on Base and Solana, no API key.

CoinGecko market data with x402-gated endpoints for agents: simple price quotes for any supported coin and currency pair, plus on-chain DEX data, paid per call in USDC on Base or Solana — no subscription.