Pay-per-call: HTTP Security Headers

Pay-per-call: IOConnex Search MCP

Pay-per-call: JSON Schema validator

Pay-per-call: Mythos Agent Toolkit

Pay-per-call: Bitcoin Network Stats — Live Block Data

Pay-per-call: Email Deliverability

Pay-per-call: IP Geolocation

Pay-per-call: DNS Lookup

Pay-per-call: Price Digest (public URL heuristic)

Pay-per-call: Raw HTTP header dump

Pay-per-call: OFAC SDN address screen

Pay-per-call: Signal Sprint Base Block

Pay-per-call: HTTP Security Headers

Pay-per-call: Base Address Reputation

Address intelligence on Base — EOA/contract/ERC-20 + nonce + ETH/USDC balance + keyless GoPlus security verdict (phishing/sanctioned/mixer/…). The loop input for triaging a counterparty. Pay-per-call via x402. An empty body is answered for the wallet that pays (the payment's signer); send {"address":"0x…"} for any other address.

Base latest block number + timestamp — a chain-head freshness probe. Pay-per-call via x402.

Resolve an ENS name or Basename to its address (vitalik.eth, jesse.base.eth), or an address to its primary name - verified to resolve back - with the profile records the owner published: url, X/Twitter, GitHub, description, avatar. Read from Ethereum mainnet through the ENS Universal Resolver; off-chain gateways go through our SSRF guard. ASCII names. Send {} for the published example. A name with no address is not charged. Pay-per-call via x402.

ETH balance of any address on Base (wei + ETH). Pay-per-call via x402. An empty body is answered for the wallet that pays (the payment's signer); send {"address":"0x…"} for any other address.

Base gas price — current wei/gwei. Cheap read-only chain primitive. Pay-per-call via x402.

What a Base address holds: the ETH balance read from the chain, every ERC-20 with its balance, market price and USD value, and a USD total - spam tokens imitating real ones are flagged and left out of the total, unpriced tokens listed but not counted. Send {} for the paying wallet. Pay-per-call via x402. An empty body is answered for the wallet that pays (the payment's signer); send {"address":"0x…"} for any other address.

ERC-20 token metadata on Base — name, symbol, decimals, total supply. Pay-per-call via x402. An empty body is answered for USDC on Base (the x402 settlement asset); send {"token":"0x…"} for any other token.

Token report — price + liquidity + full safety verdict for any ERC-20 in ONE call (DexScreener + GoPlus). One payment instead of chaining token_price + token_safety. Pay-per-call via x402. An empty body is answered for USDC on Base (the x402 settlement asset); send {"token":"0x…"} for any other token.

Transaction status on Base — success/failed, block, confirmations, gas, from/to. A pending/unknown tx returns 404 (not charged). Pay-per-call via x402. An empty body is answered for the latest transaction on Base (read live from the chain head); send {"txHash":"0x…"} for any other transaction.

USDC balance of any address on Base — the x402 settlement asset (atomic + USDC). Pay-per-call via x402. An empty body is answered for the wallet that pays (the payment's signer); send {"address":"0x…"} for any other address.

Where a token earns the most: DefiLlama's yield pools filtered by chain (default Base), token symbol (USDC, ETH…), stablecoin-only and minimum TVL (default $1M), sorted by APY or TVL - with base vs reward APY, the 30-day mean, IL risk and a link per pool. Outliers are excluded unless asked. Pay-per-call via x402.

Everything about a domain in one call: registrar, creation and expiry dates and age from the registry's own RDAP, live DNS (A/AAAA/MX/NS), email authentication (SPF, DMARC policy) and the TLS certificate it serves (issuer, validity, days left, whether it covers the name). Pay-per-call via x402. An empty body is answered for the published example domain (example.com); send {"domain":"…"} for any other domain.

Is this email address worth sending to? Syntax, domain DNS (MX, then A/AAAA), disposable/role/free-provider lists, a typo suggestion (gmial.com -> gmail.com), a normalized form and a risk verdict with reasons. No SMTP probe: it vouches for the domain, never the mailbox. An invalid address is a paid verdict; a DNS failure is 502, not charged. Pay-per-call via x402. An empty body is answered for the published example address (name@example.com); send {"email":"…"} for any other address.

Live exchange rates and a conversion for ~170 currencies and the major crypto assets, with the European Central Bank reference rate beside each live one and the deviation between them - an independent check in the same answer. {from, to, amount}; send {} for USD against eight majors. Pay-per-call via x402.

The latest Sentinel-2 satellite images of any point on Earth - date, cloud cover, tile, a JPEG preview link and the full true-colour image (10 m per pixel, Cloud-Optimized GeoTIFF) - newest first, under a cloud limit (default 30%) within a look-back window (default 60 days). Copernicus open data via Earth Search; the required attribution is included. Send {} for the published example point. No scene is not charged. Pay-per-call via x402.

Hyperliquid perpetuals in one call: mark/oracle/mid price, 24h change, funding rate and its annualised APR, open interest in coins and USD, 24h volume, max leverage - plus the same coin's next funding on Binance and Bybit for cross-venue comparison. Name a coin (BTC, ETH, SOL, HYPE…) or send {} for the most-traded markets. Pay-per-call via x402.

Live Polymarket markets: each outcome's price (the market's implied probability), 24h and total volume, liquidity, closing date and link. Search by topic (bitcoin, fed rates, election…) or send {} for the markets with the most 24h volume. A search with no open market is 404 and not charged. Pay-per-call via x402.

The latest crypto headlines from nine newsrooms (CoinDesk, Cointelegraph, Decrypt, The Block, Blockworks and more) in one call, newest first, duplicates merged - each with its link, source, time and a short summary. Filter by keyword and time window. No match is 404 and not charged. Pay-per-call via x402.

Find academic papers in any field - title, authors, year, venue, DOI, citation count, open-access link and abstract - from OpenAlex (~250M works incl. arXiv and PubMed; Crossref answers if OpenAlex is down). Filter by year range and open access; sort by relevance, citations or date. Send {} to search the published example query. A search with no result is not charged. Pay-per-call via x402.

A US-listed company's latest SEC filings by ticker or CIK - 10-K, 10-Q, 8-K with its item codes, insider Form 4, proxy statements - each with its date and a direct link to the document on sec.gov, plus the company's CIK, exchanges and industry. Filter by form type. Pay-per-call via x402. An empty body is answered for the published example ticker (AAPL); send {"ticker":"…"} for any other company.

Stablecoin intelligence — circulating supply, $1.00 peg deviation and per-chain breakdown (incl. Base) for USDC and other stablecoins (DefiLlama). Pay-per-call via x402.

Who holds an ERC-20: the top 10 holders with their share of supply and whether each is a contract, locked or a burn address, the LP holders and how much LP is locked, the creator's and owner's share, holder count, and concentration with burned/locked supply excluded. Base, Ethereum and five more chains. Send {} for USDC on Base. Pay-per-call via x402. An empty body is answered for USDC on Base (the x402 settlement asset); send {"token":"0x…"} for any other token.

Token safety & rug check — on-chain honeypot/tax/owner-privilege/holder-concentration risk verdict for any EVM token (GoPlus + DexScreener). Pay-per-call via x402. An empty body is answered for USDC on Base (the x402 settlement asset); send {"token":"0x…"} for any other token.

Tokens that just appeared or are being promoted right now - DexScreener's new token profiles, community takeovers and paid boosts - each with price, liquidity, 1h/24h volume, buys/sells, price change, market cap and pair age from its most liquid pair. Filter by chain (default every chain), list and minimum liquidity ($10k default); sort by volume, liquidity, change or newest. Send {} for every chain. A boost is paid promotion. Pay-per-call via x402.

How to reach the organisation behind a website: its social profiles (X, LinkedIn company, GitHub, YouTube, Telegram, Discord and more), its published role addresses (info@, sales@, support@…), phone numbers from tel: links and its contact page - read from the homepage and the linked contact page. Personal addresses are never returned. Pay-per-call via x402. An empty body is answered for the published example page (https://example.com/); send {"url":"https://…"} for any other page.

Read any public web page as clean text: title, description, canonical URL, the readable body with scripts, styles and navigation stripped, the first 50 links resolved to absolute URLs, and a word count. One URL in, up to 100,000 characters out; redirects are not followed, and a page with no readable text (JavaScript-only) is 422 and not charged. Pay-per-call via x402. An empty body is answered for the published example page (https://example.com/); send {"url":"https://…"} for any other page.

Technical SEO audit of a public page as a crawler first sees it: indexability, robots.txt, title and description length, canonical, viewport, headings, alt text, links, Open Graph, JSON-LD, mixed content, redirects, speed and the sitemap - each finding with a severity, plus a 0-100 score. JavaScript is not run. Pay-per-call via x402. An empty body is answered for the published example page (https://example.com/); send {"url":"https://…"} for any other page.

The x402 market by seller over the last 30 days: estimated revenue, paid calls, paying wallets, calls per payer, median price, networks and each seller's top resource - from Coinbase's public x402 discovery index, read hourly. Rank by revenue, calls or payers; filter by keyword and network; a payer floor (default 3) drops lone testers. Send {} for the top 20 by revenue. Pay-per-call via x402.