the402 x402 endpoint directory

Is this API safe to pay? Audit any x402 merchant or paid endpoint BEFORE you send money. Answers whether a service is

Validate JSON data against a bounded JSON Schema Draft 2020-12 contract for nested objects, arrays, required propertie

Get the most up-to-date market data for all traded stock symbols. Note: Snapshot data is cleared at 3:30am EST and get

SYNTHORA stablecoin-supply: circulating USD supply, price and peg deviation in basis points for the top stablecoins (U

Only what changed since your last call: pass the cursor you got back and receive just the new whale events, never the

Where whale positions get liquidated and how far price must move to trigger it: levels per market with notional at ris

Where notional is entering or leaving each market over 1h/4h/24h, plus stealth accumulation: open interest climbing wh

Long or short bias per market with a score and the reasons behind it: funding, open interest and whale positioning com

Which side the profitable leaderboard traders are on, per market: aggregated long vs short notional. The crowd-versus-

Recent news headlines for any company, topic or query: deduplicated titles with source, link and publish date from a b

Use when an agent needs agentcore route. Returns AgentCore-compatible Oblique seller router: paid ranked top-three sho

Use when an agent needs purchase web extraction sample. Returns Purchase a machine-readable extraction sample from one

Use when an agent needs base wallet profile. Returns Accountless Base mainnet wallet profile with native and ERC-20 ba

Use when an agent needs listing triage. Returns Listing history triage: persistence, price changes, duplicate variants

Use when an agent needs endpoint task evaluation. Returns One bounded x402 endpoint request and payment-flow evaluatio

Use when an agent needs bazaar listing lint. Returns Quality-score an x402 Bazaar listing (0-100): live SSRF-guarded p

Use when an agent needs gleif resolve. Returns Resolve a legal entity against the public GLEIF registry by LEI, legal

Use when an agent needs b402 preflight. Returns Validate BNB/B402 payment intent freshness, recipient, amount, deadlin

Use when an agent needs settlement verify. Returns Real on-chain x402 settlement verification on Base mainnet: fetches

Use when an agent needs mpp route. Returns MPP-native catalog-first task router: paid top-three shortlist with prices,

Compact BTC funding regime state from a four-venue normalized surface: regime label, surface median, 30d z-score, same

Register a standing watch over a set of URLs and pre-buy pull credits. POST {"urls":[...],"credits":10}; we keep those

Verify whether a supplied public source page currently supports one atomic factual claim. Returns supported, contradic

Base USDC lending APY. Live USDC lending yield on Base, read on-chain: Aave V3 USDC vs Morpho Gauntlet USDC Prime. Siz

Compares two semantic version strings and reports which is greater, lesser, or equal, using the standard semver compar

Decodes (does not verify) a JWT by base64url-decoding its header and payload segments. Signature validity is never che

Generates a QR code for the given text, returned as a base64-encoded PNG data URL, computed entirely locally with no e

Converts a color between hex, rgb, and hsl representations using exact arithmetic.

Computes the next N run times for a standard 5-field cron expression, avoiding the mental cron-schedule simulation an

Line-based diff between two strings using the Myers diff algorithm (via the diff/jsdiff library), returning a list of

Validates a JSON document against a JSON Schema using the industry-standard ajv validator, returning whether it is val

Tests a regular expression pattern against a string, guarded against catastrophic backtracking (ReDoS) by running the

Scientific unit conversion for pressure, energy, and molarity using exact conversion factors.

Periodic table element lookup by symbol or atomic number, returning name, atomic mass, and category. Covers the most c

Lookup of standard physical constants (speed of light, gravitational constant, Planck constant, elementary charge, Avo

Sunrise, sunset, solar noon, day length, and moon phase for a given latitude/longitude/date, computed via the suncalc

Descriptive statistics summary (mean, median, variance, standard deviation, and 25th/75th/90th percentiles via linear

Deterministic primality test using the Miller-Rabin algorithm with a witness set proven deterministic for all integers

Prime factorization of an integer via trial division, returning the full list of prime factors (with repetition).

Solves a system of linear equations (Ax = b) using the ml-matrix library's LU decomposition (LuDecomposition), with a

Unit conversion for length, mass, volume, and temperature using exact conversion factors (temperature uses the correct

Matrix operations: multiply, transpose, determinant, and invert, for matrices up to 20x20. Uses the ml-matrix library'

Arbitrary-precision integer arithmetic (add, subtract, multiply, power) beyond IEEE-754 float precision, using native

Safe arithmetic expression evaluator. Parses and evaluates expressions with +, -, *, /, ^, and parentheses using a bou

Tesla savings calculator. Compares annual electricity cost for a Tesla against annual gas cost for a comparable gas ve

Electric car savings calculator. Compares annual electricity cost against annual gas cost for a comparable gas vehicle

Hybrid vs gas savings calculator. Compares annual fuel cost between a hybrid and a conventional gas vehicle based on m

Gas mileage savings calculator. Compares annual fuel cost between two gas-powered vehicles based on miles driven, gas

Alcohol spending and opportunity-cost calculator. Sums home and going-out drinking costs plus associated rideshare cos

Upwork freelancer fee calculator. Applies a documented tiered marginal service-fee schedule (20%/10%/5% at $500/$10,00