36 Services from fastx402.tools

Computes HMAC-SHA256 or HMAC-SHA512 of a message with a secret key, and optionally verifies it against a provided signature

Adds or subtracts years, months, weeks, days, hours, minutes, and seconds to a date using calendar-correct rules, returning the ISO result and its weekday.

Computes SHA-1, SHA-256, SHA-384, or SHA-512 cryptographic digest of UTF-8 text, returning the result as hex or Base64

Validates a string against one of 33 named formats (email, URL, UUID, IP addresses, IBAN, JWT, crypto addresses, ISO dates, and more) using validator.js rules

Validates email address syntax and returns its normalized form (lowercase, Gmail dots and +tags stripped), local part, and domain — without contacting any mail server.

Converts two ISO 8601 dates into a human-friendly relative time string (e.g. 'about 3 hours ago') in English, Turkish, German, French, or Spanish, along with the exact difference in seconds.

Parses an absolute URL using the WHATWG URL standard and returns its normalized form, ASCII and Unicode hostname, port, path, decoded query parameters, and fragment.

Extracts a single value from a JSON document using an RFC 6901 JSON Pointer path expression.

Returns the start and end timestamps of the day, week, month, quarter, or year that contains a given date, with a configurable week start day.

Decodes ERC-20 transfer, approve, and transferFrom calldata hex into human-readable function name, checksummed addresses, and token amounts

Returns the EIP-55 checksummed form of an Ethereum/EVM address and validates whether the given casing is a correct checksum

Returns calendar facts for a given ISO 8601 date: weekday, ISO week number, week-year, day of year, quarter, days in month, leap year flag, weekend flag, and Unix timestamp.

Decodes a JWT's header and payload, reporting algorithm, issue/expiry times, expiration status, and seconds until expiry — without verifying the signature.

Converts any text title or phrase into a clean URL slug, with correct handling of Turkish and other accented/Unicode characters

Computes the 4-byte function selector and 32-byte event topic hash from a Solidity function or event signature string.

Performs a DNS lookup for a given domain name and returns structured DNS record data including answers, TTL, and status.

Returns WHOIS registration data for a given domain name, including registrar, creation/expiry dates, nameservers, and status flags.

Formats an ISO 8601 date using a date-fns/Unicode pattern in one of five locales (English, Turkish, German, French, Spanish)

Converts RFC 4180-compliant CSV text into structured JSON rows, supporting optional headers and multiple delimiters (comma, semicolon, tab, pipe).

Returns current Bitcoin network fee rates (sat/vbyte) and mempool statistics for main, testnet3, or testnet4

Given a list of semantic versions and a semver range constraint, returns which versions satisfy the constraint along with the highest matching version and match count.

Normalizes an RFC 3339 / ISO-8601 timestamp into UTC and returns structured date/time components including Unix epoch values and UTC offset

Calculates network details for an IPv4 CIDR block (netmask, broadcast, host range, usable hosts) and optionally tests whether a given IP address falls within that block.

Encodes UTF-8 text to standard Base64 or Base64url, or decodes Base64/Base64url back to UTF-8 text, returning exact results safe for HTTP headers, data URLs, and API payloads.

Converts internationalized domain names between Unicode (münchen.de) and ASCII Punycode (xn--...) forms for use in DNS lookups, certificate checks, and domain comparisons.

Parses a human-readable byte size string (e.g. '1.5 MiB', '800 KB') and returns its canonical SI and IEC representations along with the exact byte count.

Fetches a web page by URL and returns it as a base64-encoded PDF, with optional paper size selection.

Captures a screenshot of any public web page (by URL) and returns a base64-encoded PNG image, with configurable viewport width and full-page support.

Computes the Keccak-256 (Ethereum-native SHA-3) hash of a UTF-8 string or hex-encoded bytes, returning the hex digest and input byte count.

Transcribes an audio file (mp3, m4a, wav, ogg, webm, flac) at a given URL into text with timestamps and language detection, paid per-call in USDC via x402.

Fetches and extracts the visible text content, title, and description from any public web page URL via a pay-per-call HTTP GET request

Fetches a PDF from a given URL and extracts its full text content along with metadata like page count, title, and author

Decodes a base64-encoded x402 PAYMENT-REQUIRED header into human-readable payment details including network, token, amount, recipient address, and timeout.

Checks whether a specific date is a public holiday in a given country, returning holiday name, type, and metadata.

Converts a token amount between its human-readable decimal form and its on-chain atomic (integer) unit representation given a token's decimal precision.

Extracts text from a publicly accessible image URL using OCR, supporting English and Turkish languages