Convert an image at a URL to another format, with an optional quality or lossless encoding. JPEG output gets a white background where the image was transparent.

Crypto strategy backtesting API. Backtest a rule-based strategy (sma_cross, ema_cross, rsi_reversion, breakout, macd_cross) on up to 2000 closed candles of any crypto asset: signals on close, next-open fills, fees per side, long-only or long/short. Not financial advice. Past performance does not guarantee future results. Search intents: crypto backtest api, backtest trading strategy, sma crossover backtest, rsi strategy test, trading strategy api, quant backtesting.

Token due diligence API for Base (deep honeypot and liquidity analysis). Deep Base ERC-20 token due diligence: everything in the quick report plus buy-transfer-sell simulations on up to 2 pools (different venues), a table of up to 10 pools (DexScreener plus on-chain Uniswap v2/v3/v4, Aerodrome and PancakeSwap lookups) with liquidity, the contract creation block and a GeckoTerminal cross-check (gt_score, honeypot flag, developer holding).

Resize an image at a URL to a width, a height or both, keeping the aspect ratio inside the box by default (cover, contain, inside, outside or fill), optionally converting it. Returns a signed URL of the result, valid for an hour.

Holidays of a country (and optionally a state or region) in a year, with date, name and type (public, bank, school, optional, observance), from the date-holidays data for about 200 countries.

x402 site audit API for one origin. x402 site audit for one origin: finds your paid routes from /.well-known/x402 and /openapi.json (up to 8), checks each one unpaid (402 on GET and HEAD, v2 + v1 terms, accepts, Bazaar declaration) and flags drift between the discovery documents. Grade per route and for the site, with the top fixes. Search intents: x402 site audit, x402 discovery check, well-known x402 validator, openapi x402 drift, x402 route grades, paid api audit.

The current time, or a given time, in one or more IANA time zones, with UTC offset, abbreviation, whether daylight saving time is in effect, and the weekday. Give a local time with from_tz to convert it, handling DST correctly.

Add or subtract an ISO 8601 duration (P1M, P2W, PT36H) to a date, months clamped to the month's end; or count the days, weeks, calendar months, years, seconds and business days (Monday to Friday, less a country's public holidays) between two dates. Also the weekday, ISO week and day of year.

Explain a cron expression in plain English and list its next run times in a time zone (5 or 6 fields, with ranges, steps, L, W and #).

Convert a value between units of length, mass, volume, temperature, speed, area, energy, power, pressure, data size, time and more (mathjs units), such as mi to km, degF to degC, GB to MiB, kWh to J.

Evaluate an arithmetic expression with 64 significant digits (no floating point surprises): operators, parentheses, powers, roots, logs, trigonometry, percentages, constants, units (5 inch to cm) and simple statistics.

Check whether a phone number is valid and possible, find its country and type (mobile, fixed line, toll free and others), and format it as E.164, international and national (libphonenumber metadata).

Full crypto counterparty due diligence API. Full counterparty due diligence before an agent pays or interacts: quick plus age (first transaction or creation block), recent activity and direct exposure to sanctioned or scam-listed addresses, recent token approvals to the address (drainer pattern) and TokenVerdict for Base tokens; Solana adds history depth. Verdict ok / caution / block with reasons, confidence and missing_data.

What a page shows while an image loads: its BlurHash, a tiny blurred WebP preview as a data URL, its average color and its dimensions.

Draw a line of text over an image at a corner, an edge or the center, with a size relative to the image width, a color and an opacity.

Generate random IDs from a cryptographic source: UUID v4, UUID v7 (time ordered), ULID or nanoid, up to 100 at a time.

Validate a JSON value against a JSON Schema (draft-07 and 2019-09 keywords, formats such as email, uri, date-time) and list every error with its path. Patterns run on RE2, so a schema cannot stall the check.

Decode a JSON Web Token's header and claims, and say when it was issued, when it expires, whether it has expired and in how many seconds it will. The signature is not verified.

Compare two texts by lines, words or characters: what was added and removed, and a unified diff for lines.

Use when an agent, x402 test or CI job needs Base Sepolia gas now: one x402 call, no faucet login or mainnet history. Input: to (recipient address); sends 0.1 ETH (1 ETH: /v1/testnet/base-sepolia-eth/1). Output: JSON txHash (confirmed before settling), explorerUrl, amountEth, from, to. Daily limits (UTC): 5 ETH per address (both sizes), 20 overall; checked before payment. Test ETH has no monetary value. Example: ?to=0x000000000000000000000000000000000000dEaD