x402AgentTools

⛓️Crypto & Web3

Gas calculators, unit converters, staking math and chain reference data for the web3 ecosystem.

Ξ Wei / Gwei / ETH Converter

Convert between wei, kwei, mwei, gwei, microether, milliether and ether with exact BigInt arithmetic. Decimal strings of any magnitude convert without floating-point error.

Use tool →|GET /api/v1/crypto/wei-eth-converterx402 $0.001/call

⛽ Gas Fee Calculator

Calculate a transaction's gas fee: gas units × gas price (gwei) gives the ETH cost, multiplied by the ETH price for USD. Exact BigInt math for the wei amounts.

Use tool →|GET /api/v1/crypto/gas-fee-calculatorx402 $0.001/call

🪙 Crypto Price (Live)

Live cryptocurrency prices from CoinGecko's public API: current price in USD/EUR/GBP/JPY plus 24-hour change for any coin by id or common ticker (btc, eth, sol…). Cached 60 seconds.

Use tool →|GET /api/v1/crypto/pricex402 $0.002/call

🎲 Secure Random Generator

Generate cryptographically secure randomness: passwords with charset rules, hex keys of any byte length, and uniform random integers (rejection sampling, no modulo bias). Never use Math.random for secrets.

Use tool →|GET /api/v1/crypto/random-generatorx402 $0.001/call