Verifiable Random pick — string selection with or without replacement bound to a future drand round the server waits for (typically 3-6s) and verifies locally, with a reproducible proof transcript.

JSON Web Token (JWT) decoder — parse an unverified compact JWS header and claims and evaluate advisory NumericDate times without signature verification or URL fetching.

0/1 knapsack solver — exact work-bounded capacity planning and portfolio selection for maximum value, with deterministic ties and reproducible DP evidence.

Cron next-run calculator — generate future times for bounded five-field POSIX cron schedules in IANA timezones with explicit daylight-saving (DST) policies.

Omni Terminal assesses one Hyperliquid market before entering, sizing, or reducing a position using all published mark-anchored liquidation levels, explicit flow direction, margin stress, current funding/carry, and enriched AI news.

QR code generator — encode text, URLs, payment URIs, or arbitrary UTF-8 data as base64-encoded SVG or PNG in a JSON envelope.

Timezone converter — resolve civil-time daylight-saving (DST) folds or gaps and convert one local time between IANA zones.

JSON Web Key (JWK) inspector — validate bounded public RSA, EC, or Ed25519 keys and calculate RFC 7638 SHA-256 thumbprints without ownership or trust claims.

Check an ACP offering's published contract before you buy. Detects listings that declare no JSON deliverable schema, name required fields they never declare, or specify no input schema at all — the defects that make a purchase unverifiable after the fact. Reads the public listing only; nothing is purchased or executed. Deterministic, no model judgment. A PASS means the listing is machine-checkable — it is not a correctness guarantee and says nothing about output quality.

Rank and screen Brazilian investment funds from official CVM data: largest by net assets, biggest net inflows over a window, or most shareholders, filterable by class (Renda Fixa, Ações, Multimercado, Cambial). Returns fund name, manager, administrator, NAV, assets and flows. Fund screening over the whole R$ 13.8tn industry. Free sample, no payment: https://api.brazilayer.com/v1/fundos/amostra

A Hyperliquid account's recent trade fills (up to 2000) with price, size, fee and closed PnL, for any 0x address.

Google Maps local business search — find places by query and map location (coordinates viewport), returning ratings, reviews, address, phone, website, hours & service options as clean JSON.

Deep x402 audit: the full endpoint audit plus a live probe for rail coverage (Base/Solana), multi-rail detection, HTTP status, and latency — a premium trust report on any x402 endpoint.

Crypto technical indicators API: RSI-14, MACD and Bollinger Bands for BTC, ETH and SOL in one GET, no parameters. Returns JSON per asset: rsi14, macd {macd, signal, histogram} (null when there are too few candles), bollinger {upper, middle, lower, period}, lastClose and OKX perpetual funding {fundingRate, fundingTime}. Computed from CoinGecko OHLC closes (Coinbase candles fallback); methodology included. Descriptive only, not advice. Errors are not charged.

Europe regional macro + geopolitical stress pulse (no params)

Real-time transit status for commuter and traveler agents. Returns live service status, delays, and alerts.

Omni Terminal turns up to 20 market names or aliases into canonical Hyperliquid symbols to prevent downstream trading-agent tool-call failures.

Research Comparison. REQUIRES ?urls= on the paid request — a signed request without it is refused before the gate and no money moves. One signed comparison: live atomic payment terms, dated host history and gaps, same-endpoint network changes, shared receivers and limits. No research quality or ownership verdict. Full listing: https://scvd.store/menu/research_comparison. MCP tool: buy_research_comparison.

Ask the XH Agents knowledge base (15 field notes on infrastructure, x402 and agent tooling)

A Hyperliquid account's historical account value and PnL across day/week/month/all-time windows, for any 0x address.