the402 x402 endpoint directory

Single-fact: timestamp + age of the most recent Zcash block, plus hash, difficulty, and size.

Single-fact: current Zcash chain height + verification progress + best block hash. Sourced from a live operator-run ze

Single-fact: number of pending transactions in the Monero mempool right now.

Single-fact: timestamp + age of the most recent Monero block, plus hash, difficulty, and size.

Single-fact: current Monero chain height + sync status. Sourced from a live operator-run monerod node.

Single-fact: which builder has the largest slot share in the named window (24h|7d|30d)? Returns {builder, share_pct, s

Single-fact: what did the proposer of the latest block ACTUALLY get paid (priority fees + direct coinbase transfers —

Single-fact: how many borrowers have HF < max_hf and debt >= min_debt_usd right now? Returns {count, total_debt_usd}.

BTC or LTC halving countdown: blocks remaining and the estimated date of the next halving. Use for cycle-timing narrat

BTC and ETH market-cap dominance (% of total crypto market cap), plus total market cap and active-coin count, refreshe

Is it a weekend / low-liquidity window right now? Returns the current session and a 0-100 liquidity score. Use to wide

Current trading session (Asia / London / NY / Off) plus historical volatility for that session. Use to time entries ar

Graph schema definition — entry point for agents to discover available data

Maximum-safe LTV for collateralized agent loans. Computed from (cv + λ·j²)-derived variance over loan horizon + 6-mode

ETH Volatility Risk Premium — DVOL minus Parkinson realized vol (72h). Positive = sell-vol opportunity, negative = buy

UK Stamp Duty Land Tax (SDLT) calculator with first-time buyer relief and surcharges.

UK Energy Performance Certificate (EPC) ratings by postcode.

MUR exchange rates — all currency pairs from Bank of Mauritius

Deterministic phonetic rhyme (perfect + scored slant), pronunciation, syllables, scansion, homophones — from CMUdict.

ShieldAPI - x402 security preflight before agents accept or store credential material

Compare two names and return a similarity score (0-1) plus whether they share a phonetic similarity key. For deduplica

Single-fact: how many on-chain liquidations have we observed in the last `since_min` minutes, with what aggregate debt

Deterministic phonetic rhyme (perfect + scored slant), pronunciation, syllables, scansion, homophones — from CMUdict.

Deterministic unit conversion reproducing NIST SP 811 exact factors (length, mass, volume, energy, power, pressure, fo

Polymarket markets resolving soon — active prediction markets ending within N hours, sorted by volume.

Contract-code check for a Base mainnet address (is_contract + code size).

Transaction receipt (status, gas used, logs count) by hash on Base mainnet.

Spot token prices from DefiLlama — pass comma-separated CoinGecko ids, get price/symbol/confidence/timestamp.

Cross-venue perp funding rates from Hyperliquid — top coins by 24h notional volume, hourly + annualized funding, mark/

Check whether a given date is a Japanese public holiday, a weekend, or a business day. Returns the official holiday na

Returns trending tokens across the entire blockchain for a specified activity window and optional category. The size o

Paid hosted deterministic explanation for EVM/RPC/wallet/UserOperation/x402 errors. Send raw pasted error JSON, text,

Sentinel AML Intelligence: screen blockchain wallet address against 12,997+ sanctioned/blacklisted crypto addresses (O

Random fortune — fixed price, x402 exact

Real-time cryptocurrency prices for any coin in any fiat currency

Generic baseline decision procedure for an agent handling an x402 payment: ordered checks for offer validity, quote ac

Pick random items without replacement for $0.001 USDC.

JSON-RPC for Base, Ethereum, Arbitrum, Optimism and Polygon through one endpoint, no account or API key. Automatic fai

Real-world-asset (RWA) perpetual coverage across HIP-3 DEXes — which stocks, metals, forex pairs, commodities and pre-

24-hour rolling USD volume for one crypto perpetual on one venue — liquidity and activity ranking across tracked CEX a

Open interest per venue for one crypto perpetual, with mark_price alongside — positioning and crowding across tracked

Cross-venue funding-rate spread for one crypto perpetual — the highest- and lowest-paying venues and the spread in bps

Echoes back the JSON body you send, with a server timestamp. Useful for verifying your x402 client integration end to

Validate an IBAN structurally before you pay or store it: ISO 7064 mod-97 check digits plus the official per-country l

Detect the language of a text with franc (pure-JS trigram model, 61 languages + CJK/Indic scripts). Returns the ISO 63

Bank of England base rate history with current rate and time series.

Convert between wei, gwei and ether (or arbitrary-decimal ERC20 amounts) with big-integer precision; optional USD valu

Convert between wei, gwei and ether (or arbitrary-decimal ERC20 amounts) with big-integer precision; optional USD valu

Crypto Fear & Greed index — the market sentiment gauge (0 = extreme fear, 100 = extreme greed) with today's value, cla

Deterministic IBAN check before a SEPA/international transfer: format regex, per-country length (public SWIFT registry