eip155:43114
616 resources accept payment on this network.
Score an OpenAPI 3
Score an OpenAPI 3.x or Swagger 2.x spec on agent-readiness - i.e. does an LLM-driven caller have what it needs to call the API correctly without guessing. Returns a 0..100 score, severity counts, and a structured list of violations with stable rule codes. Checks: documented title/servers/paths, per-operation summary/description/operationId/tags, documented 2xx + error responses, param descriptions/schemas/examples, response descriptions, JSON response schemas.
Validate a JSON document against a JSON Schema (draft-07 subset) and g
Validate a JSON document against a JSON Schema (draft-07 subset) and get the list of violations. Supports type, required, properties, items, enum, const, min/max, length, pattern, format, anyOf/allOf/oneOf/not, additionalProperties. Deterministic - check an agent's structured output before you trust it.
Parse an IPv4 CIDR block: network address, broadcast, first/last host,
Parse an IPv4 CIDR block: network address, broadcast, first/last host, netmask, and host count. Optionally test if an IP is inside it.
Convert CSV into a GitHub-flavored Markdown table (first row is the he
Convert CSV into a GitHub-flavored Markdown table (first row is the header).
Verify an HS256/384/512 JWT signature against a secret and check expir
Verify an HS256/384/512 JWT signature against a secret and check expiry. Returns valid + decoded payload. (HMAC algorithms only.)
Parse a 5-field cron expression and return the next N run times (UTC)
Parse a 5-field cron expression and return the next N run times (UTC).
Parse CSV (quoted fields supported) into a JSON array of objects, usin
Parse CSV (quoted fields supported) into a JSON array of objects, using the first row as headers (header=false for arrays).
Get the day number within the year (1-366) for any date, plus days rem
Get the day number within the year (1-366) for any date, plus days remaining, leap-year status, percent of year complete, and a simple (Sunday-start) week number.
Get the ISO 8601 week number, ISO day-of-week, quarter, and day-of-yea
Get the ISO 8601 week number, ISO day-of-week, quarter, and day-of-year for any date. Useful for fiscal/reporting calendars, weekly aggregations, and sprint planning.
Parse a datetime from any format (ISO 8601, Unix timestamp in seconds
Parse a datetime from any format (ISO 8601, Unix timestamp in seconds or milliseconds, RFC 2822, or natural date string) and return it in every common format: ISO 8601, Unix (seconds), Unix (ms), RFC 2822, date-only, time-only, day of week, and human-relative (e.g. '3 days ago'). ?datetime=1719100800.
Convert a nominal annual rate (APR) compounded m times per year into t
Convert a nominal annual rate (APR) compounded m times per year into the effective annual rate (EAR / APY): (1 + apr/m)^m - 1. Set continuous:true for e^apr - 1.
Compound annual growth rate between a beginning and ending value over
Compound annual growth rate between a beginning and ending value over N years: (end/begin)^(1/years) - 1. Also returns total growth over the whole period.
Build the full per-period amortization schedule for a fully-amortizing
Build the full per-period amortization schedule for a fully-amortizing loan. Each row reports the period number, payment, the principal vs. interest split for that payment, and the remaining balance after that payment. Use this when the user wants to see how interest tapers over the life of the loan, or to model an extra-payment scenario by reading the balance at any period.
Holt's linear trend method - level + trend (no seasonality)
Holt's linear trend method - level + trend (no seasonality). Two smoothing parameters: alpha (level) and beta (trend). Forecast extrapolates as a straight line from the last fitted level along the last fitted trend, so it grows or shrinks linearly with horizon. Use this when your series has a persistent up/down trend but no seasonal cycle (e.g. a SaaS MRR climb, a deflating cohort retention curve).
Compute simple (SMA) and exponential (EMA) moving averages over a nume
Compute simple (SMA) and exponential (EMA) moving averages over a numeric series. Returns one value per input position - the first (window-1) SMA values are null since there isn't enough history. EMA uses the standard alpha = 2/(window+1) smoothing factor used in technical analysis.
Run the same input through gzip, brotli, and raw deflate at max settin
Run the same input through gzip, brotli, and raw deflate at max settings and report each one's output size and ratio. Use this to decide which algorithm to actually use - the answer depends on your content (binary often resists compression entirely; English prose squeezes well with brotli; JSON sits in between).
Compress a string with gzip (RFC 1952) and return it as base64
Compress a string with gzip (RFC 1952) and return it as base64. Reports input bytes, output bytes, and the compression ratio so you can decide if it was worth doing. Input can be plain text (utf8) or already-binary content (base64 or hex).
Extract a <table> from an HTML string as JSON rows (header-keyed) or C
Extract a <table> from an HTML string as JSON rows (header-keyed) or CSV. Useful for prices, schedules, sports stats, or anything an agent has already fetched as HTML. If multiple tables match, the first is used.
Great-circle distance between two latitude/longitude points using the
Great-circle distance between two latitude/longitude points using the haversine formula. Returns kilometers and miles. Deterministic.
Multi-period weather forecast for a US location from api
Multi-period weather forecast for a US location from api.weather.gov (NWS, public domain). Give latitude and longitude; returns the place plus upcoming forecast periods (temp, wind, conditions). US coverage only. ?lat=40.71&lon=-74.01
Search autocomplete: query suggestions for a partial input as a flat J
Search autocomplete: query suggestions for a partial input as a flat JSON array. Useful for query expansion, did-you-mean refinement, and topic exploration. Returns up to 20 suggestions.
Validate an ISBN-10 or ISBN-13 checksum (hyphens/spaces ignored) and r
Validate an ISBN-10 or ISBN-13 checksum (hyphens/spaces ignored) and report which format it is.
Count business days (Mon–Fri) between two dates, inclusive of the star
Count business days (Mon–Fri) between two dates, inclusive of the start, exclusive of the end. Optional list of holiday dates to skip.
Descriptive statistics for an array of numbers: count, sum, mean, medi
Descriptive statistics for an array of numbers: count, sum, mean, median, mode, min, max, range, variance, stddev, and percentiles.