Is this domain trustworthy, or is it a phishing site / typosquat / scam? Pull the reputation signals an analyst checks before clicking anything: domain age, cert issuance history, hosting reputation, DNS topology, tech-stack fingerprint, and page-content red flags. Different from a security audit - this is about whether the domain is what it claims to be.

Read the rate environment and price a bond in one workflow: the live Treasury curve, the recession-signal spread, inflation context, then price and yield a specific coupon bond at current rates. Fixed-income desk skill pack: one x402 payment runs 5 underlying tools (treasury-yield-curve, yield-curve-spread, bond-price, bond-ytm, cpi-yoy); partial-success per step.

Point at an unknown API endpoint and figure out how to use it: auth scheme, content type, version, rate limits, OpenAPI/Swagger spec discovery, and JSON response structure. The deterministic recon workflow before writing a single line of integration code. API investigation skill pack: one x402 payment runs 7 underlying tools (url-parse, http-check, http-headers, extract, html-links, json-format, json-query); partial-success per step.

Web search that returns READY-TO-USE grounding text, not links: for one query you get the passages an independent search index extracted from the pages it ranked, flattened into chunks with their source URL and title and an approximate token count, under a token budget you choose (1024-32768, default 4096). Use it to ground a model or a RAG pipeline in one call, where search + extract would take several.

Loudness-normalize any audio/video URL to a target LUFS with ffmpeg's loudnorm (EBU R128) and return MP3 - consistent levels for podcasts, clips, and TTS output. Body: {"url":"https://…/audio.wav","targetLufs":-16?}.

Extract/convert the audio track of any media URL (mp4, mov, wav, m4a, ogg…) to MP3 - the "mp4 to mp3" conversion, deterministic ffmpeg, no AI. Body: {"url":"https://…/video.mp4","bitrate":"192k"?}. Returns the MP3 as base64.

What's a competitor using? Tech stack, HTTP headers, WHOIS, and page metadata in one call. Competitor scan skill pack: one x402 payment runs 4 underlying tools (tech-stack, http-headers, whois, meta); partial-success per step.

DeFi market overview: total TVL, ETH price, Base gas, and global crypto stats in one call. DeFi dashboard skill pack: one x402 payment runs 4 underlying tools (defi-tvl, crypto-price, gas-snapshot, crypto-global); partial-success per step.

Full page SEO + security audit: content extraction, metadata, HTTP headers, robots policy, and sitemap health in one call. Page audit skill pack: one x402 payment runs 5 underlying tools (extract, meta, http-headers, robots-check, sitemap); partial-success per step.

The 'turn a URL into a card-shaped preview' workflow. Pull OpenGraph/Twitter card metadata, fetch the article body as a description fallback, normalize the og:image into a standard 1200×630 social card variant and a 400×400 square thumbnail, and extract URL/mention entities from the body for related-link surfacing. Five tools, one structured card payload ready for chat embeds, social shares, or RSS-to-card pipelines.

Has this company just reported, and what is being said about it? Recent SEC filings, the latest close, and current coverage in one call. Earnings watch skill pack: one x402 payment runs 3 underlying tools (stock-quote, search, edgar-filings); partial-success per step.

Monitor an RSS/Atom feed in one call: parse the feed, read the top story in full, extract the keywords driving the cycle, and diff the item list against your last run to isolate what's new. Feed watch skill pack: one x402 payment runs 4 underlying tools (feed-parse, extract, keywords, text-diff); partial-success per step.

Enumerate a domain's external attack surface in one workflow: certs, DNS posture, email auth, HTTP security headers, and tech stack. Security audit skill pack: one x402 payment runs 7 underlying tools (cert-transparency, dns-lookup, spf-check, dmarc-check, http-headers, tls-cert, tech-stack); partial-success per step.

Where should an agent transact this minute? Live gas on Ethereum + every major L2 side by side, Base gas tiers, a fee estimate for your transaction type, and ETH spot to price it all in dollars. Cheapest rail right now skill pack: one x402 payment runs 4 underlying tools (l2-gas-comparison, gas-snapshot, gas-estimate, crypto-price); partial-success per step.

Current yield curve snapshot: full Treasury curve, key spreads, and average rates in one call. Yield dashboard skill pack: one x402 payment runs 3 underlying tools (treasury-yield-curve, yield-curve-spread, treasury-avg-rates); partial-success per step.

End-to-end DNS health check: records, multi-resolver propagation, WHOIS, ASN, robots.txt, and reachability. DNS & network ops skill pack: one x402 payment runs 6 underlying tools (dns-lookup, dns-propagation, asn-info, whois, http-check, robots-check); partial-success per step.

Explain what an EVM transaction actually did: confirmation status, the raw transaction from the chain, decoded calldata with typed parameters, the resolved function signature, and labeled counterparties. Transaction forensics skill pack: one x402 payment runs 5 underlying tools (tx-status, evm-rpc, calldata-decode, selector-lookup, address-label); partial-success per step.

Can search engines and AI crawlers actually index this page? One pass over reachability, TLS, robots policy, sitemap health, meta/OpenGraph tags, and the on-page link graph. Technical SEO audit skill pack: one x402 payment runs 6 underlying tools (http-check, tls-cert, robots-check, sitemap, meta, http-headers); partial-success per step.

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.

Diagnose why a domain's email lands in spam: SPF posture, DMARC policy, DKIM key strength, MX targets, and a composite 0–100 score. Email deliverability skill pack: one x402 payment runs 6 underlying tools (spf-check, dmarc-check, dkim-lookup, email-deliverability, email-validate, dns-lookup); partial-success per step.