Resolve a US stock ticker (e.g. AAPL) to its SEC CIK number, the primitive every other EDGAR call needs. Returns CIK in both zero-padded (0000320193) and integer form, plus the registered company name. Backed by SEC's company_tickers.json (public ...

Latest US Treasury daily constant-maturity yields (1mo, 3mo, 6mo, 1y, 2y, 3y, 5y, 7y, 10y, 20y, 30y) as clean JSON. Source: FRED DGS* series (St. Louis Fed), public domain, no key. No params — always returns the most recent published curve.

Validate, pretty-print, or minify JSON. Returns parse errors with position when invalid.

HMAC signature of a message with a shared key. Algorithms: sha256 (default), sha512, sha1. Returns hex and base64.

Convert a color between hex, RGB, and HSL. Accepts "#1a2b3c", "rgb(26,43,60)", or "hsl(210,40%,17%)".

Early bird buyer analysis with bot detection and entry timing.

Extract a value from JSON by dot/bracket path, e.g. "items[2].name".

Hex encode or decode text. mode: encode (default) or decode.

Count BPE tokens in a text with tiktoken (o200k_base = GPT-4o default, or cl100k_base). An agent can check content fits an LLM context window before paying for an expensive call. Returns token count, char count and encoding. Honest scope: an OpenAI-style estimate — no open-source Claude tokenizer exists (exact Claude counts need the Anthropic API), Gemini differs too. Provided text only; nothing is fetched. Max 1 MB.

Percent-encode or decode a string for URLs. mode: encode (default) or decode. component: true (default) uses encodeURIComponent semantics.

Classify an email address by its domain: company vs. known free provider (Gmail/Outlook/…) vs. disposable domain. List-based heuristic, not a live DNS/MX check.

Validate an IBAN: country code, length, and the ISO 13616 mod-97 checksum.

Detect MEV activity: sandwich attacks, front-running, toxic flow analysis.

AI-generated answer to a natural-language question, grounded in live web search results with source citations. Returns clean prose plus a structured citations array (URL, snippet, favicon) — backed by an independent search index, not the model's t...

Decode a JWT without verification: header, payload, expiry status, and time remaining. (Decoding only — signatures are NOT verified.)

Base64 encode or decode text. mode: encode (default) or decode. Handles URL-safe base64 on decode.

Turn any text into a URL-safe slug (lowercase, hyphenated, diacritics stripped).

I Ching random hexagram, Book of Changes random draw, random divination cast, 周易, 易经, 卦象随机, Yijing oracle, random 64 hexagrams, Chinese divination quick draw, casual Yi Jing reading. Generate a random I Ching hexagram (1 of 64) with its lines, judgment, image, and meaning.

Parse a semantic version, or compare two (a vs b → -1/0/1, with greater/lesser flags).

Run a regular expression against text. Returns up to 100 matches with index and capture groups. Pattern ≤ 200 chars, text ≤ 10KB.