Hojun Lee

Monitor SSL certificates for expiry, chain validity, and cipher suites. Discover subdomains via Certificate Transparency logs (crt.sh). Alerts for certificates expiring within N days. No API key required.

Track the full stablecoin ecosystem: supply, cross-chain distribution, peg health, market share, and inflow/outflow trends. Covers 400+ stablecoins via DefiLlama. No API key required. Monitor USDT/USDC dominance, spot emerging stablecoins, and detect depeg risks.

Track 400+ stablecoins: circulating supply, 24h/7d supply changes (minting/burning signals), peg price deviation in basis points, and mechanism breakdown (fiat/crypto/algorithmic). DefiLlama API, no auth required. $0.002/stablecoin.

Live circulating supply for every stablecoin broken down by chain (USDT, USDC, DAI, FDUSD, USDe, sUSD…) with 1d/7d/30d deltas. Detects large mint/burn events. Macro liquidity leading indicator. DefiLlama data, no API key.

Track trending questions, tag activity, and keyword search across Stack Overflow and 170+ Stack Exchange sites. Filter by tags, sort by votes/activity/hot/week/month, and optionally include top answers. Ideal for developer trend analysis and tech popularity tracking.

Track Stack Overflow questions by tag, keyword, or user. Returns question title, score, view count, answer count, accepted answer, tags, author, and creation date. Filter by date range, minimum score, or answered status. No API key required.

Track Steam game metrics: concurrent players, all-time peak, review score, price, discount, release date, developer, publisher, genres, and tags. Fetch by game ID or search keyword using Steam's public API and store page. Monitor player trends and pricing for gaming market research.

Screen stocks using FinViz filters. Filter by market cap, sector, P/E ratio, RSI, volume, country, EPS growth, dividend yield, and 50+ other criteria. Returns fundamentals, technical indicators, and performance data. No API key required.

Fetch posts from any Substack publication: title, author, subtitle, publication date, word count, estimated reading time, tags, and post URL. Supports multiple newsletters, keyword filtering, and date range. Uses Substack's public API. No auth needed.

Aggregate tech news from TechCrunch, The Verge, Ars Technica, Wired, Engadget, and Hacker News in one place. Supports keyword and category filtering, date range, and deduplication. Returns title, source, author, URL, published date, and summary.

Fetch bilateral trade data (exports/imports) from UN Comtrade's free Preview API. Query by reporter country, partner country, HS commodity code, and year. Ideal for tariff analysis, supply chain research, and geopolitical trade intelligence. No API key required.

Track US congressional legislation: bills, resolutions, and amendments from Congress.gov. Filter by chamber, sponsor, committee, status, topic, and date range. Returns sponsor, cosponsors, status, committee, summary, and vote data. Uses Congress.gov API.

Track AI agents on Virtuals Protocol (BASE chain). Monitor volume, price changes, mindshare, holder count, and tokenomics for 80,000+ AI agents. Filter by category, volume, and holders. No API key required.

Given an EVM address, returns public identifiers: ENS reverse name, Etherscan public nametag (CEX deposit, MEV bot, DAO multisig, etc), contract verification + name, first-tx timestamp / account age, native balance. Pre-send safety check. $0.01 per address.

Search and retrieve archived snapshots of any URL from Internet Archive's Wayback Machine. Supports date range filtering, deduplication, status code filtering, and optional HTML content fetching via CDX API. Ideal for web archive research, deleted content recovery, and SEO history analysis.

Track active severe weather alerts from NOAA National Weather Service: tornado warnings, hurricane watches, flood advisories, winter storms, and more. Filter by US state, county, event type, or severity. Uses NWS public API. No API key required.

Fetch current conditions, 7-day forecasts, and historical weather data for any location worldwide. Returns temperature, precipitation, humidity, wind speed, UV index, and air quality using the Open-Meteo free API. No API key required. Supports bulk location queries.

Pass a URL + JSON schema (or natural-language goal). Claude reads the page and returns a strict JSON object matching your schema. Product / news / hotel / real-estate / job-board extraction. BYO Anthropic API key. $0.01 per page.

Convert any URL to clean Markdown plus structured metadata (title, author, date, lang, image, tags). Uses trafilatura — the same library Common Crawl uses. LLM-ready output. Batch up to 500 URLs. $0.005 per URL.

Collect country-level public health statistics from the WHO Global Health Observatory (GHO) — life expectancy, infant mortality, HIV prevalence, obesity, PM2.5 exposure, alcohol consumption, and 2,000+ more indicators. Filter by country, year range, and indicator. No API key required.

Query Wikidata's SPARQL endpoint to retrieve structured knowledge data. Use preset queries for tech companies, world leaders, Nobel laureates, unicorn startups, or top universities. Supports custom SPARQL. PPE $0.002/record.

Scrape Wikipedia articles via public MediaWiki API — no proxy, no auth. Modes: summary (extract + thumbnail), full_text, search, random, category. Supports 250+ language editions.

Fetch time-series economic data from the World Bank Open Data API. No API key required. Supports GDP, population, inflation, and 20,000+ indicators across 200+ countries. Filter by country, indicator, and year range.

Compares APY and TVL across yield-bearing stablecoins: sUSDe (Ethena), sUSDS (Sky), sDAI, sGHO, sfrxUSD vs benchmark USDC lending rates. Includes USDe peg health and spread-vs-USDC in basis points. No API key. $0.01/run.