other

Decode a base64 byte buffer from one character set and re-encode it into another (utf-8, utf-16le, utf-16be, latin1, ascii). Characters that the target set cannot represent, or bytes invalid for the source set, are clean 400s.

Convert between integers (1–3999) and Roman numerals in either direction — a digit string is encoded to Roman, a Roman numeral is decoded to an integer. Non-canonical numerals (IIII, IC) are rejected.

Convert a UTM coordinate (zone, hemisphere, easting, northing) back to decimal lat/lon on WGS84.

Check whether a specific date is a public holiday in a country (optionally by state/region).

Return both the fully-expanded (eight 4-hex groups) and canonical compressed (RFC 5952) forms of an address. IPv4 is returned unchanged in both fields.

Decode HTML entities (named, decimal and hex numeric references) back into plain text.

Add/subtract business days to a date, or count business days between two dates — skipping weekends and optional holidays.

Return the plural form of an English word (handles irregulars — person → people, mouse → mice).

Report whether two tokens sound alike under a chosen algorithm (soundex, metaphone or double-metaphone; default double-metaphone). Returns each token's codes and a boolean match.

Diff two texts. The default `unified` mode returns a unified-diff patch string; `lines`, `words`, and `chars` modes return a structured array of added/removed/unchanged parts.

Encode a UTF-8 string into base64, base64url, hex, base32, or URL percent-encoding.

One AML/KYC-style verdict for a counterparty from a single call: wallet sanctions + on-chain risk, name sanctions screening, GLEIF company identity and technical counterparty risk, merged into clear | review | blocked with an itemized findings list. $0.02.

Freeze Event Monitor analyses only the evidence supplied by the caller. It does not claim to query a chain, identify a legal status or replace an independent audit. Missing signals lower confidence and are listed explicitly; every classification includes the exact thresholds used.

BTC and ETH market-cap dominance (% of total crypto market cap), plus total market cap and active-coin count, refreshed every ~5 min. Use to gauge whether capital sits in majors vs alts. For the alt-rotation read specifically, use /alt-season.

Signed plug-in solar legality record for one US state. Free preview: GET /solar-legality/preview A missing or unknown state returns 400 or 404; you are never charged for an error.

Convert latitude/longitude coordinates into the nearest structured address. Optionally set the preferred result language.

Atomic canonical resolution for the registered Robbie George Biography Plate™ identifier. x402 payment grants one endpoint-level retrieval only. It does not grant training, embedding, bulk ingestion, redistribution, resale, synchronization, private-dataset construction, derivative-dataset creation, or Robbie's Razor framework implementation rights.

Barker's historical APY trend for stablecoins vs. US Treasury benchmark over a lookback window (7–180 days). Use for 'DeFi vs treasury', 'is stablecoin APY going up', 'crypto yield trend', '稳定币利率走势'.

Deterministic 8-bit SFX synthesis from a preset + seed — base64 WAV plus the reproducible SFXR parameter block

Mutate a known-good seed's sound (classic sfxr mutate) — nearby variations by parameter perturbation

Top DeFi yield-farming pools by APY across ~15,800 tracked pools, live from DeFiLlama: TVL, base/reward APY split, 7d APY change, impermanent-loss risk, and exposure type, with a $1M TVL floor to filter out illiquid noise. Optionally filter to one chain or stablecoin-only pools. Not ticker-specific. Supports optional limit (default 10, max 25). $0.01/call.

FOMC meeting dates and major US economic release dates (CPI, non-farm payrolls, GDP, PCE, retail sales) in one call, each with a days-until countdown, between 'from' and 'to' -- the market-wide catalysts that move every ticker at once. FOMC dates from the Fed's official calendar; release dates live from FRED, and a temporarily-unavailable release is reported explicitly, not silently dropped. Not ticker-specific. $0.01/call.

Total value locked (USD) for a DeFi protocol (e.g. "aave") or a whole chain (e.g. "Ethereum"). Provide exactly one of `protocol` or `chain`.

Top DeFi yield pools ranked by APY, with optional filters (chain, project, stablecoin-only, minimum TVL). Dust pools below `minTvlUsd` (default $10k) are excluded so reported APYs are meaningful.