Use when you need to know whether an address on Base, Ethereum, Arbitrum, Optimism or Polygon is a deployed smart contract, via a live eth_getCode call. Returns a boolean and the deployed bytecode size in bytes.
Last updated 2m ago
Overview Protocol x402
Facilitator —
Payment asset USD Coin
Network base
Category other
Source bazaar
Health Status Operational
Uptime (window) 100%
Success rate —
Confidence 6%
Quotes (14d) 3
Last checked 9/25/2026, 7:06:12 AM
Latest x402 transactions On-chain USDC settlements received on Base · 0xaD2294a042266A143234c374CD8985b9b5C1a9A6
Amount Date Payer Facilitator Tx No transactions indexed yet.
Trust score is global for the provider. Latency, price and uptime are measured per endpoint (last 24h). Click a column to sort.
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▸ GET /o/erc20-balanceN/A
Use when you need the current ERC20 token balance of a wallet on Base, Ethereum, Arbitrum, Optimism or Polygon, fetched live via balanceOf eth_call. Returns raw integer balance and a decimal-adjusted amount. $0.002 · 99 ms · Base ▸ GET /o/x402-probeN/A
Use before paying an unfamiliar x402 endpoint listed in the public Bazaar: one unpaid probe tells you if it is reachable, returns a valid HTTP 402 challenge, which networks and assets it accepts, the exact price, the pay-to address and the latency. Does not pay the target. $0.001 · 31 ms · Base ▸ GET /o/base-balanceN/A
Use when you need the live native ETH balance and USDC balance of any address on Base mainnet (chain 8453) in one call. Returns exact integer units and human decimals, plus the block it was read at. Read-only, public blockchain data. $0.002 · — · Base ▸ GET /o/base-txN/A
Use when you need to confirm whether a Base mainnet transaction hash succeeded, reverted, is pending or does not exist, with block, confirmations, sender, recipient, gas used and total fee in ETH (L2 plus L1 data fee). Read-only, public blockchain data. $0.002 · — · Base ▸ GET /o/contract-profileN/A
Use when you meet an unknown address on Base, Ethereum, Arbitrum, Optimism or Polygon and need to know what it is in one call: has code and its size, ERC-20 (name, symbol, decimals, supply), ERC-721 or ERC-1155 (via ERC-165 supportsInterface), and whether it is an EIP-1967 proxy and its implementation. $0.002 · — · Base ▸ GET /o/ens-resolveN/A
Use when you need to turn an ENS name (like vitalik.eth) into an Ethereum address, or an address into its primary ENS name. Reads the ENS registry and resolver on Ethereum mainnet live. Returns null when nothing is set. $0.002 · — · Base ▸ GET /o/erc721-tokens-of-ownerN/A
Use when you need which token ids of an ERC-721 collection an address owns on Base, Ethereum, Arbitrum, Optimism or Polygon. Works for enumerable collections (tokenOfOwnerByIndex); returns up to 50 ids per page with the total balance, and says when the collection is not enumerable. $0.002 · — · Base ▸ GET /o/event-logsN/A
Use when you need recent event logs of a contract on Base, Ethereum, Arbitrum, Optimism or Polygon: filter by contract, optional topic0 (event signature hash) and a block range of at most 200 blocks (defaults to the last 10). Returns up to 200 logs with topics and data. $0.002 · — · Base ▸ GET /o/tx-by-hashN/A
Use when you need the content of a transaction on Base, Ethereum, Arbitrum, Optimism or Polygon by its hash: sender, recipient, value, nonce, gas limit, gas price fields, input data size and function selector, and whether it is mined or pending. $0.002 · — · Base ▸ GET /o/tx-receiptN/A
Use when you need to confirm a transaction on Base, Ethereum, Arbitrum, Optimism or Polygon: success or revert, block, confirmations, sender, recipient, gas used, effective gas price, total fee and number of logs. Returns found=false for unknown hashes. $0.002 · — · Base ▸ GET /o/us-weatherN/A
Use when you need the official National Weather Service forecast for a latitude/longitude inside the United States: next periods with temperature, wind, chance of precipitation and a short summary, plus the nearest city. US government data. $0.002 · — · Base ▸ GET /o/us-weather-alertsN/A
Use when you need the active National Weather Service alerts for a US state (two-letter code) or for a coordinate: event type, severity, urgency, headline, affected areas and expiry. US government public-domain data. $0.002 · — · Base ▸ GET /o/usgs-earthquakesN/A
Use when you need recent earthquakes worldwide from the US Geological Survey: filter by minimum magnitude and a window of 1 to 72 hours, optionally near a coordinate within a radius in km. Returns time, magnitude, depth, place and coordinates of up to 100 events. US government public-domain data. $0.002 · — · Base ▸ GET /o/erc20-metadataN/A
Use when you need name, symbol, decimals and total supply of an ERC-20 token on Base, Ethereum, Arbitrum, Optimism or Polygon in one call, with the supply formatted by decimals. $0.0015 · — · Base ▸ GET /o/erc20-supplyN/A
Use when you need the current total supply of an ERC20 token on Base, Ethereum, Arbitrum, Optimism or Polygon, fetched live via totalSupply eth_call. Returns raw integer supply and a decimal-adjusted amount. $0.0015 · — · Base ▸ GET /o/erc721-ownerN/A
Use when you need the current owner of an ERC-721 token id on Base, Ethereum, Arbitrum, Optimism or Polygon via ownerOf, plus the collection's name and symbol. Returns exists=false if the id has no owner. $0.0015 · — · Base ▸ GET /o/estimate-gasN/A
Use when you need the gas a transaction would consume on Base, Ethereum, Arbitrum, Optimism or Polygon before signing it: pass from, to, optional calldata and value (wei). Returns the estimate and the cost at the current gas price. $0.0015 · — · Base ▸ GET /o/eth-callN/A
Use when you need to simulate a read-only call to any contract on Base, Ethereum, Arbitrum, Optimism or Polygon: pass the target and the ABI-encoded calldata (hex), get the raw return data. No transaction is sent. $0.0015 · — · Base ▸ GET /o/fee-historyN/A
Use when you need recent base fees and priority fee percentiles on Base, Ethereum, Arbitrum, Optimism or Polygon to pick a fee: returns the last N blocks (1 to 20) with base fee, gas used ratio and 25/50/75 percentile tips in gwei. $0.0015 · — · Base ▸ GET /o/proxy-implementationN/A
Use when you need to know if a contract on Base, Ethereum, Arbitrum, Optimism or Polygon is an upgradeable proxy: reads the EIP-1967, ZeppelinOS and EIP-1822 (UUPS) implementation and admin slots, names the standard, and tells whether the address has code. $0.0015 · — · Base ▸ GET /o/block-infoN/A
Use when you need a block header on Base, Ethereum, Arbitrum, Optimism or Polygon: pass a block number or 'latest'. Returns hash, parent, timestamp, transaction count, gas used and limit, base fee, miner and size. Read-only public data. $0.001 · — · Base ▸ GET /o/erc1155-balanceN/A
Use when you need how many copies of an ERC-1155 token id an address holds on Base, Ethereum, Arbitrum, Optimism or Polygon, via balanceOf(account, id). Read-only public data. $0.001 · — · Base ▸ GET /o/erc20-allowanceN/A
Use when you need how much of an ERC-20 token a spender is approved to move from an owner, on Base, Ethereum, Arbitrum, Optimism or Polygon, via allowance(owner, spender). Returns raw units and decimal value. $0.001 · — · Base ▸ GET /o/erc721-balanceN/A
Use when you need how many tokens of an ERC-721 collection an address holds on Base, Ethereum, Arbitrum, Optimism or Polygon, via balanceOf, with the collection name. $0.001 · — · Base ▸ GET /o/evm-statusN/A
Use when you need a live snapshot of an EVM chain: chain id, latest block number and its age in seconds, current gas price and base fee in gwei. Covers Base, Ethereum, Arbitrum, Optimism and Polygon in one batched read-only call to public RPC. $0.001 · — · Base 25 50 100
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