Base transaction details - status, from/to, value, gas used, fee, event count and method selector

Current UTC Time (paid x402 time endpoint). Current UTC time from the server: unix seconds, ISO 8601, weekday, and local wall-clock time for any IANA time zone via ?tz=. A paid x402 time endpoint for agents that need a trusted clock.

Xynaptic Crypto Whales — live large Bitcoin transfers straight from the network: biggest mempool transactions and recent block flows, sorted by value (BTC + USD). Spot accumulation/distribution in real-time. GET ?min_btc=10 (&limit=10).

Base read-only contract call (eth_call) - return data, with reverts reported cleanly

Xynaptic Battery Metals Brief — the EV-transition metals reading in one call: lithium, copper, platinum, palladium prices with daily moves, plus aluminum and silver — the battery and catalyst chain — and a composite tension verdict for EV supply chains. GET no params (optional ?assets=lithium,copper).

Random UUID v4 Generator (paid x402 endpoint). Random UUID v4 generator: 1 to 20 UUIDs per call from the server's cryptographic random source. A paid x402 utility endpoint for agents and integration tests.

Math expression evaluator - arithmetic, powers, percent, factorial and functions like sqrt, log and sin

Hyperliquid perp market for any coin - mark and oracle price, open interest, volume and funding vs Binance and Bybit

Ethereum account nonce - confirmed and pending transaction count for any address

Ethereum ERC-20 allowance - how much a spender can move from an owner, with unlimited-approval flag

Base account nonce - confirmed and pending transaction count for any address

Polygon account nonce - confirmed and pending transaction count for any address

Ethereum read-only contract call (eth_call) - return data, with reverts reported cleanly

BNB Chain transaction details - status, from/to, value, gas used, fee, event count and method selector

BNB Chain BEP-20 allowance - how much a spender can move from an owner, with unlimited-approval flag

Optimism transaction details - status, from/to, value, gas used, fee, event count and method selector

Optimism contract event logs - raw logs for a contract, filterable by event topic, newest first

Arbitrum ERC-20 allowance - how much a spender can move from an owner, with unlimited-approval flag

BNB Chain wallet balance - native BNB plus up to 20 BEP-20 token balances in one call

NFTs a wallet holds in a collection (ERC-721 Enumerable) - balance and token ids, on 5 EVM chains