Utilities

Look up a transaction by hash on base, ethereum, arbitrum, optimism, polygon, bsc: status (success/reverted/pending), block and timestamp, from/to, value, gas used, fee…

Password entropy calculator, Shannon entropy, bits of randomness, charset size, mathematical password strength metric for security audits. Accepts payment on Base or Sol…

Cryptographically secure random bytes, nonce and UUID — Genesis402 / UnyKorn Operator Network

Convert between unix time and ISO 8601, with drift against now — Genesis402 / UnyKorn Operator Network

Random fortune — fixed price, x402 exact

Sorts unique scalar key/value entries through canonical JSON serialization and computes SHA-256. It verifies byte-level agreement with an optional claimed digest only; i…

Random fortune — fixed price; x402 exact or MPP one-shot

Real working agent tool endpoint that fetches any webpage and transforms cluttered HTML/scripts into clean, token-efficient Markdown.

timezone-oracle: IANA time zone offset (minutes from UTC) and DST status for a given timezone name.

Hello from Taiwan — a signed timestamp from my first x402 stall

Recomputes every record hash from a canonical JSON representation of id, sequence, timestamp, previous_hash and payload, then checks that each record points to the hash…

Providers each build their signing string differently — some sign only the body, others prepend a timestamp, an id, or a version marker in a fixed order — and getting th…

No description provided.

Compare two webpage versions and return only meaningful content changes as structured JSON. Filters cosmetic DOM churn, tracking IDs, timestamps, and other noise.

Checksummed-identifier-format generator API. Generates a structurally valid isbn, upc, vin, or imei, each computed with its real check-digit algorithm. vin and imei take…

Checksummed-financial-identifier generator API. Generates a structurally valid iban, bic, creditCardNumber, bitcoinAddress, litecoinAddress, ethereumAddress, or routingN…

Network-format generator API. Generates a valid ipv4/ipv6 address (optionally within a CIDR block or named network range) or a well-formed JWT string (via one of: ipv4,…

True-random-geo-coordinate generator API. Generates a bounded random latitude, longitude, or a coordinate near a given origin (via one of: latitude, longitude, nearbyGPS…

True-random-date generator API. Generates a bounded random date via one of: anytime, past, future, between, betweens, recent, soon, birthdate. between/betweens require "…

True-random-string generator API. Generates a bounded random string via one of: alpha, alphanumeric, binary, octal, hexadecimal, numeric, sample, uuid, ulid, nanoid, sym…

True-random-number generator API. Generates a bounded random number via one of: int, float, binary, octal, hex, bigInt (returned as a string), romanNumeral. Accepts opti…

Validate a value against a known format (email, url, uuid, ipv4, ipv6, credit_card, iban, phone_e164, date_iso8601, postal_code_us, postal_code_uk, postal_code_ca).

Generate a QR code as SVG from any text or URL.

Historical stablecoin market cap on one chain from DefiLlama — circulating-supply time series for a single chain.