Watch one field on a web page for 30 days, e.g. a price, stock status or version number: it is read again every 15 to 1440 minutes and an alert goes to your webhook, Slack, Discord or Telegram when it changes, goes below or above a number, contains a text, or disappears. Returns the current value now; check status or stop it for free with the watch secret.

Base Latest Block: current Base mainnet block number, timestamp, base fee and gas used. $0.001 per call.

Official euro foreign exchange reference rates from the European Central Bank, published each working day around 16:00 CET for about 30 currencies. Use it to convert amounts between EUR and USD, GBP, JPY, CHF and others at the official daily rate. Optional base currency (cross rates are computed from the EUR rates) and a comma-separated list of symbols. Note: free of charge at ecb.europa.eu; you pay for access, not for the data.

Validate an EVM address, return EIP-55 checksum, optionally compute CREATE/CREATE2 contract address. Query: address, [deployer, nonce | deployer, salt, init_code_hash].

Pay Radar: pre-payment readings for an XRPL x402 endpoint (GET /v1/paycheck?url={endpoint}; alias /v1/payradar). Reads its 402 without paying and lists raw readings first: x402 shape, network, asset (RLUSD by issuer), the payTo account on the XRP Ledger (exists, activated, balance, trust line, age)…

Validate and format a Chilean RUT (tax ID) including check digit (modulo 11). Use when a Chilean RUT is entered in a form or file and you must catch typos before saving.

Base Wallet Balance: ETH and ERC-20 balances (USDC by default, up to 10 tokens) of any address on Base mainnet. $0.001 per call.

Fetch a URL and extract every hyperlink on the page, each resolved to an absolute URL and classified as internal vs external (by registrable host), with its anchor text, rel attributes (nofollow, sponsored, ugc) and whether it opens in a new tab. Returns internal/external/nofollow counts. For SEO link audits, internal-linking analysis and outbound-link/nofollow compliance checks.

Detect whether a webpage changed. Website change detection and recurring webpage monitoring for price changes, inventory changes, availability changes, documentation updates, policy updates and competitor monitoring. Compare current content with previous_hash or previous_text and return current_hash plus deterministic change status and diffs.

Current weather at a place: temperature (°C), humidity (%), pressure (hPa) and wind (m/s) from the nearest live Open-Meteo relay within 75 km, with a signed receipt. Send latitude and longitude, or a city.

Currency exchange rates and FX conversion, official ECB reference rates for USD, EUR, GBP, JPY and 25 more. Use to convert an amount between currencies with an official, citable rate: the European Central Bank's reference rates for about 30 currencies (USD, GBP, JPY, CHF, CNY...), cross rates computed from the euro rates, today or for a past date such as an invoice date. Input: base (default EUR), symbols, amount, optional date.

WARDEN verdict on an MCP server's tools/list: allow or block, a 0-1 score and every finding with the matched text (prompt injection, secret requests, exfiltration, hidden Unicode). Deterministic published rules, no network.

Extract webpage metadata, OpenGraph and JSON-LD. Returns title, description, canonical URL, robots directives, headings, Open Graph, Twitter cards and structured data for one public URL per paid request.

Use when the user asks when a Dutch car's APK (MOT) expires or whether it is still valid: expiry date, days left and a status band (expired, due within 30 or 90 days, ok), with insurance and open-recall flags. Cheap enough to run daily for a fleet. Input: Dutch licence plate. Source: RDW.

Fetch a site's robots.txt and evaluate crawl permissions: given a URL (plus optional extra paths) and a user-agent, return whether each path is allowed or disallowed, the rule that matched, the user-agent group, the crawl-delay and any declared sitemaps. Implements the Robots Exclusion Protocol (RFC 9309) with longest-match-wins, Allow-over-Disallow tie-breaking and * / $ wildcards.

Official monthly inflation (HICP, annual rate of change, all items) for EU countries, the euro area and the EU from Eurostat. Give a country code (NL, DE, FR, EA20, EU27_2020) and the number of recent months. Use it for price indexation, wage or rent adjustment and economic context. Eurostat data, CC BY 4.0; values unchanged.

Find cities and towns worldwide (all places with 15,000+ inhabitants, about 30,000) by name, optionally within a country: coordinates, country, region code, population, time zone and GeoNames id, largest first. Use it for geocoding place names, disambiguation and to get a time zone or coordinates for a city. GeoNames data, CC BY 4.0, refreshed nightly.

Use when you need to check an IBAN before a payout or invoice: length per country, mod-97 checksum (catches typos), SEPA membership, and for Dutch IBANs the bank (ING, ABN AMRO, Rabobank, bunq...). Does not confirm the account holder.

Validate an IBAN (international bank account number): ISO 13616 mod-97 check digits and per-country length registry for 88 countries. Returns formatted IBAN and BBAN. Use when someone enters a bank account (IBAN) and you must catch typos before a transfer.

Extract webpage metadata, OpenGraph and JSON-LD for one public URL. Scalar single-URL contract for MCP and autonomous buyer runtimes.