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Compute a SHA-256, SHA-384, or SHA-512 digest of UTF-8 text; returns hexadecimal output (default SHA-256).

Send email notification for payment confirmations, alerts, receipts.

One HTTP request per host, matched against an in-house signature set. Every hit carries a confidence value from 0 to 100 and the evidence it rests on: response header, asset path, cookie name, meta generator, DNS or ASN record. Results are cached for 24 hours per host, so a repeat lookup of the same domain answers from cache.

Convert an ISO datetime into another timezone, with offset, weekday and Unix time.

Format a non-negative integer as an ordinal — both the suffixed form (21st) and the ordinal words (twenty-first).

Convert a byte count to a human-readable size (B/KB/MB/GB/TB/PB, 1024 steps, 2 decimals). Input: bytes.

Import report: count rejection reasons independently of DNS latency. Reuses the existing email-list-clean motor. No SMTP probes or mailbox existence/catch-all proof. Local part case, plus and dots are never folded. Up to500 source rows;65s engine bound,70s article bound; one inflight native mail process. Price0.001 USDC plus existing motor quote, minimum0.004; supplied rows including rejected/dupl

Canonicalizes device_id, nonce and message, computes an HMAC-SHA256 tag with caller-supplied ephemeral key material, and optionally compares a claimed tag in constant time. It does not provision devices, store keys or replace asymmetric device identity; do not submit long-lived production secrets.

Curated Bitcoin coinbase scriptSig messages (printable ASCII only). Pool tags, BIP-comment campaigns, political statements. Window up to 7d.

Cheapest end-to-end x402 purchase test. Always returns a 402 challenge without payment and the current full NegPrice decision after a valid USDC payment.

Email and domain trust check. Give an email address or a domain, get one risk level (low, medium, high) with plain-language flags and the facts behind them: domain age, registrar, expiry and hold status (RDAP); MX, SPF and DMARC policy; the live TLS certificate; and for emails, syntax, disposable-provider and role-address checks. Judges the domain: does not verify that the mailbox exists and does

South African phone number formatting and classification: converts an SA number in any common format to international +27 (E.164) and local formats, and says whether it is mobile, landline (with area for major cities), toll-free, VoIP or premium-rate. Useful for cleaning contact lists, SMS and WhatsApp messaging, and form validation.

Weather forecast for a location (global, keyless): current conditions, an hourly series (up to 48h) and a daily summary (up to 10 days: min/max temp + condition), from met.no. Pass lat+lon, or a place name. For travel, logistics, events, energy. No API key.

Read-only public DNS lookup report

Reverse-DNS lookup for an IP: PTR record plus a best-effort list of other domains hosted on the same IP.

Deterministic daily book pick from the indexed corpus, date-seeded so every caller gets the same answer on the same day. Optional date override for backfill. Returns book_id and drill-down routes. No license, no API key required.

Historical PostgreSQL support-end evidence for a selected major release.

Summarise IPv4 or IPv6 CIDR blocks into the minimal set (merging adjacent and overlapping blocks) plus the covering supernet.

What is the sales tax rate at this US address, ZIP+4 or ZIP? The combined rate and each state, county, city and district rate in the 24 Streamlined Sales Tax states (WA, OH, MI, NJ, TN, …), computed by Distill from each state’s SST rate and boundary files. Updated quarterly. $0.005 per call (x402, USDC on Base); 3 free calls a day.

Recase a string into camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, dot.case, path/case, Sentence case, Capital Case, Train-Case, no case, Title Case, or plain UPPER/lower — the word boundaries are detected regardless of the input casing.

Audits word conflicts in public trademark indexes to verify name availability.

Domain registration and DNS in one call: RDAP registrar, created, updated, expires (days left), status codes, nameservers, DNSSEC, plus DNS A, AAAA, MX, NS, TXT and CAA records.

Verify a single email: syntax, MX records, SMTP RCPT probe, catch-all, disposable, role-based, free-provider, typo suggestion, 0-100 score, and verdict.

Aligns caller-labeled dimensions, computes cosine similarity and a normalized L1 difference, and flags drift against a supplied cosine threshold. It does not infer goals from behavior, decide which goal is correct or detect deception; results depend entirely on the supplied vector representation.

Public DNS records of a domain in one call: A, AAAA, MX, NS, TXT, CAA.

Parse a Cache-Control value, explain each directive, compute freshness and flag conflicts or leaks.

WCAG contrast ratio between two hex colors with AA and AAA pass/fail for normal and large text.

Computes the observed germination rate and a Wilson score interval from germinated and tested counts using a supplied normal critical value. It does not correct sampling bias, test vigor, identify disease or predict field emergence.

x402engine — Run code in isolated sandbox — Python, JavaScript, Bash, R (up to 5 min)

Incheon Airport (ICN) security and departure-hall wait times per gate, Terminal 1 and 2, updated every minute, shortest queue picked. Travel, airport, live. English, Japanese or Korean (lang=en|ja|ko)