Guides

Practical problems, each solved with one call.

• DOI lookup API: paper metadata and citation counts
  Resolve a DOI or a citation string to title, authors, journal, year, publisher, citation count and licence links with one call. Pay per lookup.
• ENS resolver API: ENS name to address and address to name
  Resolve an ENS name to its Ethereum address, or look up the primary name of an address, read from the ENS registry on Ethereum mainnet. Pay per call.
• Wikipedia summary API: lead-section extract by title
  Get the lead-section summary of a Wikipedia article by title and language: plain-text extract, short description, canonical URL and last-edit time. Pay per call.
• SSL certificate and domain expiry check API for many domains
  Check SSL certificate and domain registration expiry for one domain or a whole list in one call, with a warning window you choose. Pay per domain.
• Link preview and Open Graph metadata API
  Get title, description, canonical URL, Open Graph and Twitter card fields, favicon, language, feeds and JSON-LD types for any public URL. Pay per page.
• Sitemap and robots.txt audit API
  Audit a website robots.txt and XML sitemaps in one call: blocked paths, sitemap health, URL counts, duplicates, off-host URLs and a ranked list of issues. Pay per audit.
• RSS and Atom feed to JSON API
  Turn any RSS, Atom or JSON Feed into one clean JSON schema, or give a normal web page and let the feed be discovered. Pay per feed.
• Danish electricity prices as an API
  Hourly and 15-minute day-ahead spot prices for Denmark and neighbouring areas, plus the CO2 intensity of the grid, from one HTTP call.
• Company registry lookup API for AI agents and KYB
  Resolve a company name, domain, registry number, LEI or VAT number to its official legal entity, with status, address, industry codes and LEI. Pay per lookup, no subscription.
• Validate an IBAN from code
  Check an IBAN's checksum, country length and format with one call. No account needed, nothing is sent to a bank.
• EU VAT number validation API
  Check whether an EU VAT number is valid and active, and get the registered name and address where the member state publishes them.
• Company lookup APIs: LEI and the Nordic registers
  Find companies by LEI or name, and look up Norwegian and Finnish company registrations by number. Company-level data only.
• EU tender alerts by country and CPV code
  Search recent EU public procurement notices by buyer country, CPV code and keyword, and run it on a schedule to get new tenders.
• Exchange rates and central bank rates as an API
  Euro reference exchange rates for any date since 1999, the ECB key interest rates and US Treasury average rates in one place.
• Check disposable emails and email DNS from code
  Detect temporary-mail domains, role addresses and typos, and inspect MX, SPF and DMARC records, without sending any email.
• Wallet balances and transaction lookups for Solana and Base
  SOL and token holdings with USD values on Solana, ETH and major tokens on Base, and decoded transaction receipts on both.
• Solana swap tool for AI agents and bots (MCP and HTTP)
  Quote and build non-custodial Solana swaps from an agent or bot: unsigned transactions only, your wallet signs, one fixed fee shown in every quote.
• Turn a web page into clean Markdown for an LLM
  Fetch a public page and get its main text as Markdown with headings, lists, tables and absolute links. Respects robots.txt.
• Check an npm or PyPI package for known vulnerabilities
  Look up advisories for an exact package version and see the first fixed version and the latest release.
• Domain registration date, age and expiry from code
  Registration, last-change and expiry dates, status, nameservers and registrar for a domain. No personal contact details.