Base L2 mainnet current gas price (gwei) via LlamaRPC eth_gasPrice. Use no params. Built for AI agents pricing Base swaps, x402 settlements, and L2 deploy costs.

Bitcoin address balance and stats via blockstream.info (no key). Returns confirmed/unconfirmed sats and BTC, tx count. Use ?address=bc1... or 1.../3.... Built for AI agents tracking BTC wallets and treasury balances.

Bitcoin recommended fee rates (sat/vB) for fast/half-hour/hour/economy/minimum via mempool.space. Use no params. Built for AI agents constructing BTC transactions, fee estimation UIs.

Ethereum mainnet native ETH balance for an address via LlamaRPC (no API key). Returns wei, eth, and optional USD value. Use ?address=0x...&with_usd=true. Built for AI agents doing portfolio reporting, fraud screening, and wallet onboarding.

Ethereum mainnet current gas price (gwei) via LlamaRPC eth_gasPrice plus latest block base fee. Use no params. Built for AI agents timing on-chain ops, contract deployment cost estimation.

Ethereum transaction details and receipt by hash via LlamaRPC. Returns from, to, value, gas, status, block, logs count, contract address (if created). Use ?hash=0x.... Built for AI agents auditing payments, debugging contract calls, monitoring on-chain activity.

Uniswap V2 and Aerodrome LP position math on Base: underlying token amounts, pool share, current value, and impermanent loss versus holding. Give a pool address plus your LP amount or wallet. Search terms: LP position value, impermanent loss calculator, liquidity pool share, Aerodrome, Uniswap V2, AMM math.

Token holder concentration on Base: top holder percentages, top 10 share, holder count, and which top holders are contracts like pools or bridges versus real wallets. Useful for rug risk and distribution analysis. Search terms: token holders, concentration, top holders, whale analysis, supply distribution, rug risk.

Decode EVM calldata or a Base tx hash into a readable function call: signature, selector, and decoded typed arguments. Search terms: calldata decoder, ABI decode, function selector 4byte, transaction decoder, EVM tx decode.

Look up arXiv preprint metadata. Returns title, authors, abstract, publish/update dates, categories, PDF URL, DOI, comments, journal ref. Use ?id=1706.03762 (with or without version). Built for AI agents doing ML/physics/math literature review.

Convert any DOI to BibTeX format via doi.org content negotiation. Returns ready-to-paste BibTeX entry. Use ?doi=10.1038/nature12373. Built for AI agents preparing manuscripts and reference managers.

Look up scholarly metadata for any DOI via CrossRef. Returns title, authors, journal, publication date, abstract, citation count, references, license, URL. Use ?doi=10.1038/nature12373. Built for AI research agents doing literature review and citation graph traversal.

Format any DOI into a styled citation (apa, mla, chicago, ieee, harvard, vancouver). Returns plain-text bibliography string. Use ?doi=10.1038/nature12373&style=apa. Built for AI agents producing draft references.

WCAG contrast ratio calculator / accessibility checker / color contrast / a11y / WCAG 2.1 AA AAA / text contrast / color blindness / readable text color. Calculate WCAG 2.1 contrast ratio between two colors and return pass/fail for AA/AAA at normal/large text sizes.

Hex to HSL converter / hue saturation lightness / HSL color picker / hex to hsl / RGB to HSL / color space conversion / CSS hsl() / color theory. Convert hex color into HSL (Hue, Saturation, Lightness) and return both RGB intermediate and CSS hsl() string.

Hex to RGB converter / color converter / hex color parser / #FF0000 to rgb / 3-digit hex / 6-digit hex / web color decode. Convert hex color codes (#FF0000, FF0000, #F00) into RGB integer values and CSS rgb() string.

Random color generator, random hex, random RGB, random HSL, color picker, batch colors, pleasant random color, vibrant colors. Generate one or more random colors with optional saturation and lightness constraints.

CSV to JSON / JSON to CSV / csv parser / csv to json converter / json to csv array / tabular data converter / spreadsheet to json / comma separated values parser / data transform. Bidirectional convert between CSV and JSON. CSV first row used as headers.

JSON to YAML / YAML to JSON / yaml parser / json to yaml converter / config file converter / yaml config / json string to yaml / convert yaml to json / yml json. Bidirectional convert between JSON and YAML with pretty-print.

Markdown to HTML / HTML to Markdown / MD to HTML / markdown renderer / GFM markdown parser / convert md to html / convert html to markdown / markdown converter / html parser. Bidirectional convert between Markdown and HTML. Direction by 'from' param.

Timestamp converter / unix timestamp to date / ISO 8601 converter / epoch to date / date string to unix / time format converter / utc to local time / unix time / epoch milliseconds / human readable date. Convert between unix epoch (sec or ms), ISO 8601, and human-readable date strings. Auto-detect input format.

AES decryption, AES-256-GCM decrypt, symmetric decryption, authenticated decryption, decrypt cipher, decode encrypted. Decrypt AES-256-GCM ciphertext given the key, IV, and authentication tag.

AES encryption / AES-256-GCM / symmetric encryption / authenticated encryption / data encryption / secure encryption / cipher / encrypt string. Encrypt plaintext using AES-256-GCM with a 32-byte key. Returns IV, ciphertext, and authentication tag.

HMAC calculator / HMAC-SHA256 SHA512 SHA1 MD5 / message authentication code / hash with secret / signed hash / API request signing / webhook signature / JWT signature. Compute HMAC of a message with a secret key using any standard hash algorithm.

PBKDF2 key derivation / password hashing / KDF / scrypt alternative / stretch password / derive encryption key / password-based key derivation / iterations / salt. Derive a cryptographic key from a password using PBKDF2 with configurable iterations, salt, and hash algorithm.

Random bytes generator / cryptographic random / CSPRNG / secure random / random token / nonce generator / session key / API secret generator / random hex base64. Generate cryptographically secure random bytes in hex or base64 encoding.

base64 encode / base64 decode / Base64 encoder / Base64 decoder / encode base64 / decode base64 / base64 encode online / base64url / URL-safe Base64 / RFC 4648 encode / encode text to base64 / decode base64 string / JWT prep / data URI encode / binary base64 encoding. Standard or URL-safe Base64 encoding/decoding of any text. For AI agents, JWT manipulation, API token handling, data URI generation.

cron parser / cron expression parser / parse cron expression / cron parser online / cron schedule parser / crontab parser / cron syntax parser / cron decoder / cron validator / next run calculator / cron to human readable / crontab inspector / cron job parser. Parse 5-field cron expressions and compute next N execution times. Returns human description + upcoming timestamps. For AI agents, schedule debug, automation pipelines.

hash sha256 generator, SHA256 hash generator, SHA-256 hash, generate SHA256 hash, SHA-1 SHA-256 SHA-384 SHA-512 hash, MD5 hash generator, cryptographic hash, hex digest, checksum, message digest generator, file integrity hash, content fingerprint. Compute hash of any text using MD5, SHA-1, SHA-256, SHA-384, or SHA-512. Returns hex digest. For AI agents, integrity checks, deduplication, content addressing.

JWT decoder / JSON Web Token parser / JWT inspector / claims extractor / OAuth token decoder / JWT header parser / JWT payload reader / jwt.io alternative / API token introspection. Decode JWT header and payload (signature NOT verified). For AI agents, OAuth flow debug, API token inspection, auth analysis.

regex test / test regex / regex tester / test regular expression / regex test online / regex pattern test / regular expression test / pattern matcher / JavaScript regex test / find regex matches / regex validator / regex debugger / regex 101 alternative. Test any regex pattern against text. Returns all matches with capture groups and indices. For AI agents, pattern extraction, text validation, log parsing.

UUID generator API / UUID generator / UUIDv4 generator / UUIDv7 generator / random UUID generator / unique ID generator / batch UUID generator / GUID generator / RFC 4122 UUID generator / online UUID generator / database UUID generator. Generate cryptographically random UUID v4 or time-sortable UUID v7, single or batch up to 100. For AI agents, distributed systems, database row IDs, request tracking, correlation IDs, idempotency keys.

Comprehensive domain reputation report combining RDAP (modern WHOIS), DNS records, email security (SPF/DKIM/DMARC), SSL certificate inspection, and domain age. Returns risk_summary (low/medium/high) and specific risk_reasons. Use ?domain=example.com. Built for fraud detection, marketing list verification, KYA workflows, and security agents.

DNS records for a domain: A, AAAA, MX, NS, TXT, SOA, CAA. Use ?domain=example.com. Built for DNS audit and email infrastructure verification.

Email security posture: SPF/DKIM/DMARC presence and parsed policy. Detects missing or misconfigured email authentication. Use ?domain=example.com. Built for email deliverability and phishing prevention.

SSL/TLS certificate inspection: issuer, subject, valid_from, valid_to, days_remaining, SAN list, fingerprint, signature algorithm. Detects expired and expiring certificates. Use ?domain=example.com&port=443.

Modern WHOIS via RDAP protocol (RFC 7480): registrant, registrar, registration date, expiry, nameservers, status flags. Use ?domain=example.com.

Base32 encoder/decoder / RFC 4648 / Crockford / case-insensitive / DNS / TOTP secret / 2FA key encoding / human-readable base32. Encode binary or text to/from Base32.

Base58 encoder/decoder / Bitcoin / Solana / IPFS CID / Flickr / no ambiguous chars / address encoding / wallet address format. Used by BTC, Solana, IPFS.

HTML entity encoder/decoder / XSS prevention / named entities / numeric entities / & < > / character escape. Escape user input for safe HTML.

Morse code encoder/decoder / international Morse / dot-dash / amateur radio / SOS / signal encoding / accessibility / fun text conversion.

URL encoder/decoder / percent encoding / RFC 3986 / query string escape / form data / encodeURIComponent / decodeURIComponent. Safely escape URLs for HTTP.

discover rss feed / find rss feed / rss autodiscovery / find atom feed / discover feeds from URL / rss feed finder / detect rss feed / rss feed discovery / atom feed discovery / website rss feeds / extract feed URLs / find subscribe URL. Discover RSS/Atom feed URLs declared by a website HTML link rel=alternate tags. Returns array of {url, type, title}. Use ?url=https://www.theverge.com. For AI agents subscribing to sites programmatically.

rss feed parser / rss parser / parse rss feed / rss feed parse / parse rss / rss to json / atom feed parser / parse atom feed / RSS 2.0 parser / Atom 1.0 parser / xml feed parser / feed parser API / rss feed reader / feed aggregator. Parse any RSS 2.0 or Atom feed URL. Returns channel/feed metadata (title, link, description, language) and items array. Use ?url=https://hnrss.org/frontpage&limit=20. For AI agents monitoring news, blogs, content feeds.

podcast rss parser / podcast feed parser / parse podcast feed / podcast rss / iTunes podcast feed / podcast feed parse / podcast metadata API / podcast episode extractor / podcast rss feed reader / podcast audio URL extractor / podcast transcript pipeline. Parse podcast RSS feed with iTunes namespace. Returns podcast metadata (author, image, category) plus episodes with audio_url, audio_type, duration, episode/season. Use ?url=https://feeds.simplecast.com/.... For AI agents indexing podcasts.

Convert an amount between currencies at current ECB rate. Returns input amount, target amount, rate, date. Use ?amount=100 and from=USD and to=EUR. Built for AI agents quoting prices in multiple currencies.

Current crypto prices via CoinGecko (free tier). Returns price in vs_currency, 24h change, market cap, volume, last update. Use ?id=bitcoin and vs=usd or ?id=bitcoin,ethereum,solana and vs=usd,eur. Built for AI agents for portfolio tracking and on-chain context.

Crypto price history over a window (CoinGecko free). Returns daily price series (open/close per day), market cap, volume. Use ?id=bitcoin and vs=usd and days=30 (max 365 on free tier). Built for AI agents doing TA and back-testing.

Real-time forex rates from European Central Bank (via Frankfurter). Returns base currency, rates against one or more targets, last update date. Use ?from=USD&to=EUR,GBP,JPY,CNY (comma-separated targets). Built for AI agents pricing cross-border ops, treasury, and travel.

Historical forex rate for a specific date (ECB data via Frankfurter). Returns rates for the requested date, going back to 1999. Use ?date=2024-01-15&from=USD&to=EUR. Built for AI agents doing back-testing, audit, accounting reconciliation.