Grade a page's content quality - extract the readable content then analyze keyword density. Content grade skill pack: one x402 payment runs 3 underlying tools (extract, keywords, readability-score); partial-success per step.

Price, market cap and volume series for a coin over an ARBITRARY time window: `from`/`to` as unix seconds or ISO dates, or `lookback` ("6h", "3d", "2w") ending now. Granularity is automatic upstream: 5-minute points for a window of 1 day or less, hourly up to 90 days, daily beyond. The windowed sibling of crypto-history (which counts days back from now): use it to align with a specific event, a filing date or another series.

OHLC candles for a coin: days 1 (30-min candles), 7 or 14 (4-hour), 30 / 90 / 180 / 365 (daily), in any vs currency. Returns aligned {time, open, high, low, close} bars plus the window's high/low/first/last and % change. The candle sibling of crypto-history, which returns close-only points: use OHLC for technical indicators, range/volatility work and charting. Cached in-process for 60 seconds. Data provided by CoinGecko.

Full profile of one coin by id: name/symbol, description, categories, contract addresses per platform, links (homepage, explorers, repos, social), hashing algorithm, genesis date, and a market snapshot in your currency: price, rank, market cap, fully diluted valuation, 24h volume, ATH/ATL with dates and distance, circulating/total/max supply, 24h/7d/30d/1y change. One call for the metadata a token-risk or research agent otherwise assembles from five. Cached in-process for 5 minutes.

The 'did this API contract change in a way that breaks our integration?' workflow. Diff two OpenAPI snapshots structurally, lint the new one for agent-readiness regressions, extract the endpoint surface for inventory comparison, validate a known-good payload against the new contract, and summarize security-relevant changes. Six tools, one go/no-go answer on whether the upstream API broke us.

How old and legit is this domain? WHOIS registration, DNS resolution, and TLS certificate in one pass. Domain age and legitimacy skill pack: one x402 payment runs 3 underlying tools (whois, dns-lookup, tls-cert); partial-success per step.

Markets (tickers) listed on one exchange: base/target pair, last price, 24h volume, USD- and BTC-converted last price and volume, bid-ask spread %, trust score (green/yellow/red), anomaly and stale flags, trade URL and last trade time. Filter by `coins` (coin ids, max 10); pages of up to 100 tickers (`page`), trimmed to `limit` (default 50). Where is a coin actually trading, at what spread, and is the volume trusted. Cached in-process for 60 seconds. Data provided by CoinGecko.

Point at an address (or even a rough place name) and assemble the situational brief: precise coordinates, the canonical postal address, what's within walking distance, the live weather forecast, active NWS hazard alerts, and recent seismic activity. The deterministic 'what should I know about this place right now?' workup.

The 'is this site healthy, addressable, and crawlable - right now?' workflow. DNS resolution → HTTP reachability → security headers → TLS certificate expiry → robots policy. Five tools, one structured status payload an operator (or an uptime bot, or a pre-flight check before an extract/crawl) can act on. Site status snapshot skill pack: one x402 payment runs 5 underlying tools (dns-lookup, http-check, http-headers, tls-cert, robots-check); partial-success per step.

Take a signup form submission and run the full onboarding workup deterministically: validate the email, score the chosen password, mint a stable internal ID, derive a URL-safe handle from the display name, generate a recovery / API secret, hash the password for storage, and verify the 2FA setup code. One pass, every step a pure-CPU call.

Full email auth posture: SPF, DMARC, DKIM, and composite deliverability score in one call. Email security skill pack: one x402 payment runs 4 underlying tools (spf-check, dmarc-check, dkim-lookup, email-deliverability); partial-success per step.

One tokenized real-world asset by id (gold, nvidia, tesla, spy ...): identity, type, image and web slug joined with its onchain market row - price, market cap, 24h volume and change in your currency. Two cached upstream reads, one answer. Use rwa-list to find the id. Data provided by CoinGecko.

Find the cheapest gas right now: Base gas, Ethereum gas, Base fee estimate, and ETH price for USD conversion. Gas optimizer skill pack: one x402 payment runs 3 underlying tools (gas-snapshot, gas-estimate, crypto-price); partial-success per step.

One call answers 'can this wallet pay right now?' - USDC balances on Base AND Solana, live Base gas, and a ready-to-share card onramp funding link if it's running dry. Agent wallet readiness check skill pack: one x402 payment runs 3 underlying tools (wallet-balances, gas-snapshot, onramp-link); partial-success per step.

The production ingest path for every incoming webhook: verify the provider signature (GitHub / Stripe / Shopify / Slack, constant-time, replay-window enforced), schema-validate the now-trusted body against the provider envelope, fingerprint the raw bytes for redelivery dedup, normalize the event timestamp to UTC + epoch, and redact PII before anything hits a log. Five pure-CPU tools - the accept-or-reject gate, run on every event.

Recent Form 4 insider transactions filed against a company (officer, director, or 10% holder trades). Backed by EDGAR's full-text search (efts.sec.gov) filtered by subject-company CIK - Form 4 is owned by each insider's CIK, not the company's, so this is the only single-call path.

Compare two or more loan offers - different rates, terms, fees, prepayment structures - on the metrics that actually matter (monthly payment, total interest, year-1 equity build, NPV at your discount rate, effective rate). Apples-to-apples math without opening a spreadsheet. Loan comparison skill pack: one x402 payment runs 5 underlying tools (loan-payment, amortization, compound-interest, npv, irr); partial-success per step.

TLS/SSL security posture check: live certificate inspection, HTTP security headers, and CAA DNS records. SSL audit skill pack: one x402 payment runs 3 underlying tools (tls-cert, http-headers, dns-lookup); partial-success per step.

Full weather briefing for a location: current conditions, 7-day forecast, and air quality index in one pass. Weather briefing skill pack: one x402 payment runs 3 underlying tools (weather-current, weather-daily, weather-air-quality); partial-success per step.

Boolean verdict with reasons: is this address a real factory-issued B20 on Base? Checks the 0xB200 address prefix, ERC-20 readability, and whether the B20 feature set is activated on the registry.