Explore APIs

Wax and fragrance oil weights for container candles from jar size, fill level, wax density and fragrance load.

Fewest land border crossings between two countries, with the countries passed through, or NO_LAND_ROUTE.

Best text color (black or white) for a background hex color, with contrast ratios and WCAG AA/AAA results for both.

Render a FEN position as an 8x8 ASCII board (White at the bottom) plus a piece-by-square list.

Airport weather now and ahead in one call: current flight category, worst forecast category, wind and trend.

Convert an airport code between IATA (3 letters) and ICAO (4 letters) and validate the format; reports unknown codes.

Current space-weather conditions — normalized NOAA SWPC Kp, solar wind, magnetic field, and X-ray flux used for solar-flare monitoring, with observation times and freshness.

Percent-encode or decode text as URL component, path, query or form data (UTF-8), with byte counts.

US federal regulations in the pipeline — documents on public inspection at the Federal Register, filed by agencies and scheduled to publish, with type, agencies, filing time and the scheduled date. Use to see tomorrow's rules, notices and executive orders before they are published.

Convert text to camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, Title Case, sentence case and a URL slug.

Aquarium volume in US gallons and litres from inside dimensions, usable water after substrate, and the water's weight.

Adjust p-values for multiple testing (Bonferroni, Sidak, Holm, Benjamini-Hochberg) and see which tests survive.

Top up $0.1 USDC and get $0.11 of agentsvc.io credit (10% bonus), valid 180 days. Returns a bearer token: send "Authorization: Bearer <token>" with any /api/v1/proxy/{slug} call or MCP request instead of an x402 payment. Calls are then paid from the balance without an on-chain step (a few milliseconds). Failed calls are refunded. To add to an existing token, send it in the Authorization header wit

Latest NDBC buoy observation: wind, gust, waves, swell, pressure and water temperature, with a Beaufort and sea-state screen.

Air changes per hour (ACH) from airflow and room volume, or the CFM needed for a target ACH.

Use when an agent needs any web page as clean LLM-ready markdown (no ads, nav, or scripts) for RAG, research, or summarizing. Example input: GET /x402/v1/web-extract?url=https://example.com/article. Example output: {"url":"https://example.com/article","title":"…","markdown":"# Title\n\nBody text…","wordCount":812}

FuelScout cheapest-fuel query (station-level where open data exists, regional averages otherwise)

Great-circle (haversine) distance between two coordinates in km, miles and nautical miles, with bearing and midpoint.

Rank up to 6 countries on one indicator (GDP, growth, inflation, unemployment...) with the year of each value.

Country profile from Wikidata: capital, population, area, languages, currency, leaders, ISO codes, borders, with property ids.

Recent earthquakes worldwide above a magnitude, newest or largest first, optional bounding box, with a match count.

Caffeine remaining after hours, and the time until it drops below a threshold, from a half-life you can set (default 5 hours).

Global news article search by GDELT — normalized fulltext search across worldwide media (query syntax: phrases, OR, sourcecountry, theme, tone) returned as a clean snake_case envelope.

BlackForge crypto market data from the major spot exchanges: every column, 1-minute to daily buckets, 90-day lookback. Covers 100 billable rows; finer buckets and premium columns count as more than one row each.

SSL/TLS certificate check: expiry, issuer, SANs, chain validity, hostname match, negotiated protocol/cipher, and weak-algo warnings for a public HTTPS host. Clean JSON.

Exact age in years, months and days from a birth date as of a date, plus next birthday and days until it.

Published fact-checked episodes, newest first, with optional filters by category slug, show id or speaker slug. Paged.

Compute or verify the GS1 mod-10 check digit for EAN-8, UPC-A, EAN-13, ITF-14 (GTIN-14) and SSCC numbers.

Recent earthquakes — search newest-first USGS seismic events by rolling time window and minimum magnitude, with revision, freshness, and provenance.

EPSS exploit-probability score and percentile for up to 10 CVEs, ranked, with a high/elevated/low verdict.