US Economic Data (FRED)

Any FRED economic time series by id or alias: CPI, core PCE, unemployment, payrolls, GDP, fed funds, SOFR, Treasury yields, mortgage rates, M2, oil, VIX, jobless claims... Latest value, change, 1-year % change and history. Use for macro analysis and economic questions.

Explain a cron expression (5 fields, names like mon-fri, or @daily) in plain English and list its next run times in any UTC offset. Use to check schedules before deploying jobs.

Bitcoin network fee rates in sat/vB for next block, 30 minutes, 1 hour and economy, plus mempool size, block height and the cost of a typical payment. Use right before sending BTC.

Check up to 20 domain names at once, or one name across several TLDs (com, ai, io...), for registration via RDAP and DNS: available or taken, registrar and expiry. Use for brainstorming product names and finding free domains.

Current weather and a daily forecast (up to 9 days) for any city, address or coordinates: temperature, min/max, humidity, wind, clouds, pressure, sky and precipitation, from the Norwegian Meteorological Institute. Use for travel, events, logistics or energy planning.

Official ECB reference exchange rates for about 35 currencies (USD, EUR, GBP, JPY, CNY, INR, AED, SAR and more) for today or any date since 1999, from any base currency, with optional amount conversion. Use to convert prices, invoices or salaries between currencies.

Current EIP-1559 gas fees for Ethereum, Base, Arbitrum, Optimism or Polygon: next base fee, slow/standard/fast priority and max fee in gwei, block utilisation and the cost of a plain transfer (L2 L1-data fees excluded). Use right before sending a transaction or to compare chains.

Internet Archive Wayback Machine snapshots of a URL: the capture closest to a date, plus the first and latest captures, with direct archive links. Use to see how a page looked before or recover deleted content.

Encode or decode text: base64, base64url, hex, URL percent-encoding, HTML entities, ROT13, binary, Unicode escapes and punycode, or detect to try decoding unknown input.

Official National Weather Service forecast for a US location: 7-day day/night periods or hourly, with temperature, precipitation chance, wind and text forecast. US and territories only.

Lead summary of the Wikipedia article that best matches a topic, in any language edition: title, short description, summary paragraph, image, coordinates, Wikidata id and link. Use for quick factual background on a person, place, company or concept.

TLS certificate of a domain: whether it is valid, issuer, subject, valid-from and expiry dates, days left, all SAN hostnames, TLS version and cipher. Use for uptime/expiry monitoring or security checks.

US Treasury par yield curve from 1 month to 30 years (percent) for the latest day or any date since 1990, with 10y-2y and 10y-3m spreads, inversion flag and up to 60 days of history. Use for risk-free rates, discounting, macro analysis or answering where 10-year yields are.

User reviews of an iPhone/iPad app from Apple's public App Store reviews feed, by app id or store URL: rating, title, text, date, app version and helpful votes, plus average rating and rating counts. Up to 500 per country. Use for app feedback analysis, bug reports or competitor research.

Read any RSS or Atom feed (or a website that links one) and get clean JSON items: title, link, date, author, summary text, categories and image, plus feed title and language. Use to monitor blogs, news sites, podcasts or release notes without parsing XML.

Look up any EVM chain by chain ID or name (8453, base, arbitrum): chain ID in decimal and hex, native currency, public RPC URLs, block explorers and testnet flag. Use to configure wallets, RPCs or cross-chain apps.

Search open Polymarket prediction markets by keyword (election, bitcoin, fed, AI...) and get each event's markets with live outcome probabilities, best bid/ask, 24h and total volume, liquidity, end date and link. Use to answer what the market thinks will happen, or to find a market to trade.

Trending or newly launched DEX pools on Base, Solana, Ethereum, BSC and more: token, price, FDV, liquidity, 24h volume, price change and buy/sell counts. Use to spot new memecoins and momentum early.

Search the Apple App Store for a keyword through Apple's official iTunes Search API and get up to 50 apps in store rank order with full details: developer, rating, price, version and update date. Use for keyword/ASO research or finding competitors.

The Crypto Fear & Greed Index (0 extreme fear to 100 extreme greed) for today, with up to a year of daily history. Use as a market-sentiment signal for trading, newsletters or answering how the crypto market feels.

Public holidays of 150+ countries and their states/regions, or stock-market holidays (NYSE, ECB TARGET), for any year, and whether a given date is a holiday or business day with the next business day. Use for scheduling, delivery dates, payroll or market-open checks.

Top cryptocurrencies by market cap (up to 250) with price, 1h/24h/7d change, volume, all-time high and supply, optionally within a CoinGecko category (layer-1, meme-token, artificial-intelligence, real-world-assets). Use for market overviews and screeners.

Search Kalshi, the US-regulated prediction exchange, for open events (Fed decisions, CPI, elections, weather, crypto prices, sports) and get every market's yes bid/ask and last price as probabilities, volume and close time. Use for US economic and political event odds.

Most active open Polymarket events right now, ranked by 24h volume, total volume or liquidity, optionally by tag (crypto, politics, sports, economy, tech, ai). Each event lists its markets with live probabilities. Use to see what traders are betting on today.

Today's macro briefing in one call: US Treasury yield curve with 10y-2y and 10y-3m spreads, recession and rate-path signals read in plain words, Fed funds, mortgage rates, breakeven inflation, the dollar index, oil and other public FRED series with 1-day, 1-week and 1-month changes, and policy rates of 10 major central banks. Use for market commentary, newsletters or context before a trade.

This week's macroeconomic calendar: CPI, jobs, GDP, PMIs and central-bank decisions with time (UTC), currency, impact, forecast and previous value. Filter by impact (High, Medium, Low) and currency.

Balance of any ERC-20 token (contract address, or USDC/USDT/DAI by symbol) for a wallet or ENS name on Ethereum, Base, Arbitrum, Optimism or Polygon: raw and decimal-adjusted amount, symbol and decimals; up to 20 tokens per call. Use before transfers, swaps or payments.

Details of an iPhone/iPad app from Apple's official iTunes Lookup API, by app id or store URL: title, bundle id, developer and website, rating, rating count, price, genre, version, size, release and update dates. Use for app research or competitor tracking.

Business contact details of a company website: generic company emails (info@, sales@, support@), company phone numbers, company social pages (LinkedIn, Facebook, Instagram, X, YouTube and more), name and address, from the home, contact, about and imprint pages. Personal emails are left out. Use to find how to reach a business.

Read a raw storage slot of any contract (eth_getStorageAt), also decoded as uint and address. Use for proxy slots, packed variables and debugging.

Count a text's tokens and estimate the cost of one call on popular LLMs (or the models you list), input plus an expected number of output tokens, and whether it fits each context window.

AWS EC2 on-demand hourly and monthly prices in 21 regions: one instance type, or the cheapest types with at least N vCPUs and GB of memory in a family (GPU, m7i, Compute optimized...). Linux or Windows.

API prices of 400+ LLMs (OpenAI, Anthropic, Google, DeepSeek, Llama, Qwen...) per million input/output tokens with context length, searchable by name and sortable by price, context or newest.

Balance of a Bitcoin address (confirmed and pending), total received and sent, transaction count and its latest 10 transactions with net amount. Use to check a BTC payment or wallet.

Status of a Bitcoin transaction: confirmed or pending, confirmations, block, time, fee and fee rate, RBF flag, inputs and outputs. Use to confirm a BTC payment or decide whether to bump a fee.

OHLCV candles for a crypto pair from Coinbase Exchange at 1m, 5m, 15m, 1h, 6h or 1d, up to 300, oldest first. Use for charting, technical indicators (RSI, moving averages) and backtests.

Blockchains ranked by DeFi total value locked with share of the market, gas token and chain id. Use to compare ecosystems (Ethereum, Solana, Base, Arbitrum...) or track where capital is moving.

Convert an amount of any token (BTC, ETH, SOL, symbols or chain:address) into one or more fiat currencies (USD, EUR, GBP, AED, JPY, ~35 more), with the price per unit each way. Use for invoices, accounting or pricing in local currency.

Decentralized exchange volume: total market 24h/7d and the top DEXs (Uniswap, Aerodrome, Raydium...) with 24h, 7d, 30d volume and daily change, for all chains or one chain. Use to compare DEX activity or chain usage.

Resolve an ENS name (vitalik.eth) or Basename (jesse.base.eth) to its address and profile records (avatar, url, twitter, github, email, description), or an address to its verified primary name. Use before sending funds to a name or to show who owns a wallet.

Centralized crypto exchanges ranked by trust score or adjusted 24h volume: name, volume, markets, supported fiat currencies, website and notices such as hacks. Use to pick a venue or check one.

Crypto protocols ranked by fees paid by users or revenue kept (Tether, Circle, Uniswap, Hyperliquid, chains...) over 24h, 7d and 30d, for all chains or one chain. Use for fundamental analysis and protocol valuation.

Total crypto market capitalisation, 24h volume, Bitcoin dominance, 24h change and distance from the all-time high, in one call. Use for a market summary or risk-on/risk-off context.

Current USD price and 24h change for up to 20 crypto tokens per call, by symbol (BTC, ETH, SOL, PEPE), CoinGecko id or chain:contract address (base:0x833589..., ethereum:0x...). Covers thousands of coins and on-chain tokens. Use for portfolio valuation, trading decisions or answering what a token costs now.

Stablecoins ranked by circulating supply (USDT, USDC, USDe, DAI...) with 1-day, 7-day and 30-day supply change, peg price, mechanism and main chains, plus total USD stablecoin supply. Use to track liquidity flowing into crypto.

Live spot price of a crypto pair on Coinbase and Kraken: bid, ask, last, 24h open/high/low and volume, and the price gap between the two exchanges. Use for an exact executable price or a quick arbitrage check.

Facts about an ERC-20 contract read from the chain (Ethereum, Base, Arbitrum, Optimism, Polygon): name, symbol, decimals, total supply, USD price and fully diluted value. Use to verify a token address before trading or integrating it.

Coins trending on CoinGecko right now (most searched in 24h) with price, 24h change, market cap and volume, plus trending categories. Use to spot what retail is looking at or find narratives gaining attention.

Status of an EVM transaction by hash: pending, success or failed, block, confirmations, timestamp, from/to, value, gas used, fee (plus L1 fee on Base/Optimism) and ERC-20 token transfers. Searches Ethereum, Base, Arbitrum, Optimism and Polygon if no chain is given. Use to confirm a payment settled.

A Rust crate on crates.io: latest stable version, description, license, total and 90-day downloads, repository, docs, minimum Rust version and dates. Use to choose or audit a Rust dependency.