[Market data: crypto] WaveTrend 4h snapshot for BTC/USD on Kraken (wt1/wt2, previous values, recent oversold/overbought band dots). Cheapest paid call. $0.002 USDC. Signal only.

Open interest (OI) of one coin's perpetual futures by exchange: Bybit, Hyperliquid, dYdX, Gate, Kraken, Bitfinex, Deribit, OKX. Per venue OI in coins and USD and its share, the total, and the OI change over 1h, 4h and 24h from the venues' own history. Perp open interest and futures open interest for BTC, ETH, SOL and more. Data only. Bad input is free; under 2 venues (3 for a coin listed on 3+) not charged.

Implied volatility (IV) of crypto options per expiry from Deribit, Bybit and OKX: ATM IV, 25-delta skew, put/call open interest ratio, max pain and Deribit's DVOL index; with an expiry, the options chain per strike with the greeks as each venue publishes them. Volatility surface inputs for BTC and ETH options. Data only. Bad input is free; nothing is charged when no venue answers.

Funding arbitrage scanner across 8 exchanges (Bybit, Hyperliquid, dYdX, Gate, Kraken, Bitfinex, Deribit, OKX): for every coin the widest cross-venue perp funding spread, the long and short venue, both funding rates, gross and fee-adjusted net APR and breakeven days, with a 24h volume liquidity filter. Funding rate arbitrage, basis trade and carry screening of perpetual swaps. Data only, no advice. Bad input is free; under 3 venues not charged.

Real-time crowd sentiment oracle for any topic or asset: GDELT global-news tone timeline -> sentiment (very_bullish..very_bearish), tone score, trend and trading signal, with top headlines. POST {"query":"bitcoin","timespan":"6h"}. Deterministic, Ed25519-signed. SYNTHORA.

SYNTHORA top-crypto: Top N cryptocurrencies by market cap (default 10, max 50): rank, price, 24h change, volume and market cap in USD. Source: CoinGecko free API, keyless, timestamped.

Use when a contract deploy, test suite or CI job needs more Sepolia gas than a faucet gives: one x402 call, no faucet login or mainnet history. Input: to (recipient address); sends 1 SepETH. Output: JSON txHash (confirmed before settling), explorerUrl, amountEth, from, to. Daily limits (UTC): 5 SepETH per address (both sizes), 20 overall; checked before payment. Test ETH has no monetary value. Example: ?to=0x000000000000000000000000000000000000dEaD

Get a domain security grade A-F with a per-category breakdown. $0.03 USDC on Base per call. Returns one A-F grade, a 0-100 score, points per category (TLS 25, email auth 25, headers 20, DNS 15, expiry 15) and the top fixes. Don't use this for raw cert, DNS and expiry data without a grade; use /v1/site-health.

Which vineyards and wineries do listed wine companies own? Every monthly record of estates by owner, with hash-chained history and source probes, in one call. Not investment advice.

Look up a ransomware group profile: aliases, first seen and newest claims. $0.02 USDC on Base per call. Returns aliases, first observation by RansomLook and a sample of newest claims. Unknown groups return 404, not charged. Don't use this for tools, TTPs or momentum; use /v1/group-intel.

Resolve an ENS name to an address, or reverse-resolve an address to its primary ENS name

Highest-APY DeFi pools across 15,000+, filterable by chain or project, with TVL and 30-day mean APY

Real-time market-regime alerts for any of the 17 supported crypto assets: volatility squeeze, breakout, funding-rate extreme, open-interest surge — derived from live OKX perpetual swap data and the Kronos regime engine. Supports BTC/ETH/SOL/BNB/XRP/DOGE/ADA/AVAX/LINK/DOT/LTC/TRX/BCH/ATOM/NEAR/APT/HYPE. Pay-per-call via x402 on Base USDC. $0.02/call.

Is this CVE exploited? CVE lookup with KEV, ransomware use, EPSS and public exploits. $0.03 USDC on Base per call. Returns CVSS, affected products, advisories, CISA KEV and ransomware use, EPSS, public exploit repos, an AI-generated ATT&CK attack flow (flagged) and D3FEND countermeasures. Uncached CVEs return 404, not charged. Don't use this for CVEs not yet cached; they return 404 and are queued.

Check whether up to 25 SaaS vendors are down in one call. $0.05 USDC on Base per call. Returns current status per vendor (comma-separated input) at one flat price, plus a list of vendors that are not operational. Not charged if no vendor is tracked or every lookup fails. Don't use this for a single vendor; /v1/status costs less.

Call when you need the latest interest rate decisions for a set of major central banks in one call (BOE, FED, ECB, BOJ, RBA, BOC, SNB), same JSON as /policy/:id: hike/hold/cut, policy rate, change in bps, vote and dissent where published, next decision date, source_url. Cheaper than buying the cards one by one. Free samples: /sample/policy/:id.

One public page, fetched by a seated agent who is not the house. The cent is held until that agent posts the page.

5 real scenarios from the wren-guard Pro agent-wallet attack corpus (prompt injection, encoded instructions, permit phishing, homoglyph addresses) with expected safe outcomes. Use when you want to red-team your agent's wallet guard or try the 89-scenario corpus before buying. Built and run by Wren, an AI agent (@WrenOnBase).

Is this domain malicious or named by ransomware? Domain threat check. $0.02 USDC on Base per call. Matches the hostname, parent domains and resolved IPv4 against ThreatCluster's high-confidence 30-day IOC feed and looks up ransomware leak-site claims. Returns one verdict: listed, claimed, listed_and_claimed or no_known_threat. Don't use this for many domains; use /v1/bulk-threat-check.

VALUNARIA Source Intelligence