BitBooth echo endpoint — pays a tiny USDC fee, returns a JSON echo. Reference implementation of the x402 + CDP Facilitator + Bazaar discovery loop.

Pay-per-call IP lookup and risk intelligence API. Send an IPv4 or IPv6 address and receive JSON with risk score, risk label, ASN, ISP, organization, geolocation, reverse DNS, hosting/proxy/VPN/Tor signals, verified bot detection, scanner/honeypot indicators, and AI-powered subnet behavior analysis via x402 v2 on Base.

Citation lookup and reference list for a paper. Given a DOI, arXiv id, OpenAlex id, or PMID, returns its references (the works it cites) and its cited-by list (recent works that cite it), plus full metadata and citation count — for bibliography building and citation lookup. Keyless via OpenAlex and Semantic Scholar.

Historical weekly price series for a Stock Trends symbol.

Diff two web pages or compare a URL against a stored snapshot — change detection and web monitoring with structured diff output for AI agents

Cross-provider arbitrage analytics for hosted inference. Per-model: cheapest_paid, most_expensive_paid, spread_usd, savings_pct, median_paid_blended, fastest_tps, cheapest_with_tps, free_tier_offers. Plus provider_rollup (cheapest_count, top_tps_count, value_score 0-100) and top_arbitrage models sorted by savings_pct desc. Pairs with the free /api/inference-providers matrix. The "where to migrate workloads" call.

List of recently flagged Solana tokens (DANGEROUS or RISKY safety level) with reasons.

x402-preflight: confirm your wallet can transact, and see your balance, in one certified call. Pay $0.01 USDC on Base, get a signed on-chain-anchored receipt. The safe first transaction before you ship real volume.

Check if a domain name is available for registration by querying RDAP and DNS — pass a bare name (e.g. mybrand) to sweep it across 10 popular TLDs simultaneously, or a full domain (e.g. mybrand.com) to check that single domain — returns registration status, expiry date if registered, and available/taken TLD lists so agents can find the best domain for a brand or project.

Current top DeFi yield opportunities filtered by chain and minimum TVL. Returns pool, project, chain, APY (base + reward), TVL, and stablecoin flag, sorted by APY. Sourced live from DefiLlama with attribution. For agents scanning yield opportunities.

Live network gas prices (slow / average / fast, in gwei) for any chain — the pre-transaction read every trading, sniping, and settlement agent makes before sending a tx to size the fee. Across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. Free upstream (Blockscout); one paid call instead of running your own RPC.

Need verified company data? One $0.95 dossier for AI agents: firmographics + SEC + domain trust + per-field source trail. KYC/KYB due diligence by domain. Ed25519-attested, degrades per-section when sources missing. Base USDC x402. Matches: verified company file, KYB, corporate registry intel.

Crypto price, market cap, 24h volume, and % change (1h/24h/7d) for any coin. 1,000+ coins supported. $0.002 USDC per call.

Web search powered by Exa

Google Maps Place Details (Full)

BTC Volatility Risk Premium — DVOL minus Parkinson realized vol (72h). Positive = sell-vol opportunity, negative = buy-vol. Response includes regime classification (LOW/MID/HIGH), raw inputs for audit (DVOL, RV_72h, RV_6h, spot), timestamp, and open methodology URL.

Stratalize — attested finance, legal, healthcare, and compliance intelligence. Signed, independently verifiable receipt on every call (trust.stratalize.com/verify). Use when a macro agent or portfolio manager needs current commodity price levels and inflation pressure signal. Returns WTI crude, natural gas, gold, copper, wheat, soybeans with weekly and monthly changes. Example: live WTI and grain levels with inflation-pressure label. Source: EIA + FRED daily

Tavily search-lite — one x402 POST proxies Tavily Search API. $0.042 USDC per request. Entry SKU. Agent search: search lite, serp, tavily, web search, semantic search.

Scan public crypto communities and feeds for keywords and compute real-time sentiment scores.

Instant website SEO audit. On-page SEO, performance, and accessibility snapshot for any URL — title, meta tags, headings, links, image alt, load time, and an issues list with score.