# Services from onchaincheck.dev on Zero

> onchaincheck.dev serves 68 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/onchaincheck.dev
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/onchaincheck.dev/health.json

## Services

- [Arbitrum One ERC-20 Token Risk & Market Snapshot](https://www.zero.xyz/c/arbitrum-one-erc-20-token-risk-market-snapshot-65949502/llms.txt): $0.01/call via x402. Returns a 0-100 risk score with reasons, on-chain metadata, ownership/proxy analysis, privileged function flags, and Uniswap v3 market data for any ERC-20 token on Arbitrum One.
- [Arbitrum One Wallet Profile](https://www.zero.xyz/c/arbitrum-one-wallet-profile-4f244cfb/llms.txt): $0.01/call via x402. Returns a comprehensive onchain profile for an Arbitrum One address, including wallet age, first funder, ETH balance, nonce, recent transfers (native/ERC-20/NFT), top counterparties, and large USD transfers.
- [Arbitrum One ERC-20 Large-Trade & Whale Tracker](https://www.zero.xyz/c/arbitrum-one-erc-20-large-trade-whale-tracker-4b213b52/llms.txt): $0.02/call via x402. Returns whale and large-trade data for an ERC-20 token on Arbitrum One, including individual trades, buy/sell volumes, net flow, and top buyer/seller wallets over a configurable time window.
- [Base Onchain Data – ERC-20 Token Rug Check & Due Diligence](https://www.zero.xyz/c/base-onchain-data-erc-20-token-rug-check-due-diligence-57729ef1/llms.txt): $0.01/call via x402. Returns a 0-100 risk score with reasons, ownership/proxy/mint/pause/blacklist flags, and live DEX price, liquidity, and FDV for any ERC-20 token contract on Base.
- [Base Onchain Data - Address Inspector](https://www.zero.xyz/c/base-onchain-data-address-inspector-eb534bf8/llms.txt): $0.005/call via x402. Identifies what lives at a Base blockchain address: EOA wallet, smart contract type, token standard (ERC-20/721/1155), name, symbol, proxy info, bytecode size, nonce, and ETH balance.
- [Base Onchain Wallet Profile](https://www.zero.xyz/c/base-onchain-wallet-profile-8547c842/llms.txt): $0.01/call via x402. Returns a comprehensive onchain profile for a Base network address including wallet age, first funder, contract type, ETH balance, recent transfers, top counterparties, and large USD transfers.
- [Base Transaction Lookup](https://www.zero.xyz/c/base-transaction-lookup-fa888025/llms.txt): $0.005/call via x402. Returns a human-readable summary of a Base blockchain transaction including status, block info, sender/recipient, ETH value, gas fees, method selector, and decoded ERC-20 token transfers.
- [Base Onchain Data – ERC-20 Whale & Large-Trade Tracker](https://www.zero.xyz/c/base-onchain-data-erc-20-whale-large-trade-tracker-72bceaf2/llms.txt): $0.02/call via x402. Returns all buys and sells for an ERC-20 token on Base over the last N minutes, including USD size, side, wallet, transaction hash, buy/sell volume, net flow, and top buying/selling wallets.
- [Ethereum Transaction Decoder](https://www.zero.xyz/c/ethereum-transaction-decoder-f677bec4/llms.txt): $0.005/call via x402. Returns a human-readable summary of an Ethereum transaction including status, block, sender/recipient, ETH value, gas details, method selector, and decoded ERC-20 token transfers with symbols and amounts.
- [Ethereum ERC-20 Token Rug Check & Due Diligence](https://www.zero.xyz/c/ethereum-erc-20-token-rug-check-due-diligence-3992b385/llms.txt): $0.01/call via x402. Returns a 0-100 risk score with reasons, token metadata, ownership/proxy flags, privileged bytecode functions, and Uniswap v3 market data for any ERC-20 token on Ethereum.
- [Ethereum Address Type & Token Standard Inspector](https://www.zero.xyz/c/ethereum-address-type-token-standard-inspector-3547f727/llms.txt): $0.005/call via x402. Identifies whether an Ethereum address is a wallet or contract, detects token standards (ERC-20/721/1155), retrieves name/symbol/decimals, and surfaces proxy/upgrade details, bytecode size, nonce, and ETH balance.
- [Ethereum Onchain Data – Wallet Profile](https://www.zero.xyz/c/ethereum-onchain-data-wallet-profile-7ad91fde/llms.txt): $0.01/call via x402. Returns a comprehensive onchain profile for an Ethereum address: wallet age, first funder, EOA/contract type, ETH balance, recent transfers (native/ERC-20/NFT), top counterparties, and large USD transfers.
- [OP Mainnet ERC-20 Token Rug Check & Due Diligence](https://www.zero.xyz/c/op-mainnet-erc-20-token-rug-check-due-diligence-25bf2078/llms.txt): $0.01/call via x402. Returns a 0-100 risk score with reasons, token metadata, ownership status, privileged-function flags, and Uniswap v3/Velodrome market data for any ERC-20 token on OP Mainnet.
- [OP Mainnet Wallet Profile](https://www.zero.xyz/c/op-mainnet-wallet-profile-a931c30d/llms.txt): $0.01/call via x402. Returns a comprehensive onchain profile for an OP Mainnet address: wallet age, first funder, EOA vs contract, ETH balance, nonce, recent transfers, top counterparties, and large USD transfers.
- [OP Mainnet ERC-20 Whale & Large-Trade Tracker](https://www.zero.xyz/c/op-mainnet-erc-20-whale-large-trade-tracker-c12666ba/llms.txt): $0.02/call via x402. Returns buy/sell trade history, volume summary, net flow, and top whale wallets for an ERC-20 token on OP Mainnet over a configurable time window, sourced from its deepest WETH/USDC pools on Uniswap v3 or Velodrome.
- [Polygon PoS ERC-20 Large-Trade & Whale Tracker](https://www.zero.xyz/c/polygon-pos-erc-20-large-trade-whale-tracker-ffb33613/llms.txt): $0.02/call via x402. Returns buy/sell trades, volume summary, net flow, and top whale wallets for an ERC-20 token on Polygon PoS over the last N minutes, sourced from Uniswap v3 WPOL/USDC pools.
- [Polygon PoS Address Inspector](https://www.zero.xyz/c/polygon-pos-address-inspector-eb88428b/llms.txt): $0.005/call via x402. Identifies what lives at a Polygon PoS address: EOA vs contract, token standard (ERC-20/721/1155), name, symbol, proxy details, bytecode size, nonce, and POL balance.
- [Polygon PoS ERC-20 Token Risk & Due-Diligence Snapshot](https://www.zero.xyz/c/polygon-pos-erc-20-token-risk-due-diligence-snapshot-5351f24d/llms.txt): $0.01/call via x402. Returns a 0-100 risk score with reasons, token metadata, ownership/proxy info, privileged function flags, and live Uniswap v3 price/liquidity for any ERC-20 token on Polygon PoS.
- [Solana Token Rug Check & Due Diligence](https://www.zero.xyz/c/solana-token-rug-check-due-diligence-6341453c/llms.txt): $0.01/call via x402. Returns a 0-100 risk score with reasons, token metadata, Token-2022 controls, holder concentration, and live market data (price, liquidity, volume) for any Solana SPL or Token-2022 token by mint address.
- [Solana Wallet Portfolio & Activity](https://www.zero.xyz/c/solana-wallet-portfolio-activity-3ee3885f/llms.txt): $0.005/call via x402. Returns a Solana wallet's full token portfolio (SOL + SPL + Token-2022 balances with USD values) and recent transaction activity summary including 24h transaction count and history depth flag.
- [Token Risk Check](https://www.zero.xyz/c/token-risk-check-347714ec/llms.txt): $0.01/call via x402. Returns a 0-100 risk score with plain-language reasons, flags, and market data for any ERC-20 or SPL token on Base, Ethereum, Arbitrum, Optimism, Polygon, or Solana.
- [Wallet Safety Checks](https://www.zero.xyz/c/wallet-safety-checks-076baad5/llms.txt): $0.02/call via x402. Screens a crypto wallet address for OFAC SDN sanctions, age, type, activity, and optionally token risk before sending or accepting payment
- [OnchainCheck Wallet Safety Lite Check](https://www.zero.xyz/c/onchaincheck-wallet-safety-lite-check-5732a6af/llms.txt): $0.01/call via x402. Screens a crypto wallet address for OFAC sanctions, wallet age, account type, first funder, and recent large transfers across EVM chains and Solana, returning ok/caution/block with plain-English reasons
- [Wallet Safety Checks – OFAC SDN Sanctions Screener](https://www.zero.xyz/c/wallet-safety-checks-ofac-sdn-sanctions-screener-01d1bb7a/llms.txt): $0.005/call via x402. Screens a crypto address against the US Treasury OFAC SDN list and identifies whether it is a wallet or contract on EVM chains or Solana
- [Arbitrum One Gas Conditions](https://www.zero.xyz/c/arbitrum-one-gas-conditions-0ac69bca/llms.txt): $0.005/call via x402. Returns current Arbitrum One gas metrics including block number, base fee, gas price, priority fee in gwei, and estimated ETH and USD costs for native and ERC-20 transfers.
- [Arbitrum One ERC-20 Allowance Checker](https://www.zero.xyz/c/arbitrum-one-erc-20-allowance-checker-9c4db0b1/llms.txt): $0.005/call via x402. Returns the ERC-20 allowance a spender has on an owner's tokens on Arbitrum One, including whether it's unlimited, the owner's balance, and the actual spendable amount right now.
- [Arbitrum One Wallet Balance Checker](https://www.zero.xyz/c/arbitrum-one-wallet-balance-checker-14c6ed52/llms.txt): $0.005/call via x402. Returns the native ETH balance and up to 20 ERC-20 token balances for a given Arbitrum One wallet address, with symbols and decimal-adjusted amounts.
- [Arbitrum One Transaction Lookup](https://www.zero.xyz/c/arbitrum-one-transaction-lookup-038649b7/llms.txt): $0.005/call via x402. Returns a human-readable summary of an Arbitrum One transaction including status, block, sender/recipient, ETH value, gas fee, method selector, and decoded ERC-20 token transfers.
- [Arbitrum One Address Inspector](https://www.zero.xyz/c/arbitrum-one-address-inspector-1d6cea7d/llms.txt): $0.005/call via x402. Identifies the type and metadata of any Arbitrum One address: EOA wallet, ERC-20/721/1155 contract, proxy details, token name/symbol, bytecode size, nonce, and ETH balance.
- [Arbitrum One New Trading Pools](https://www.zero.xyz/c/arbitrum-one-new-trading-pools-ff573945/llms.txt): $0.01/call via x402. Returns newly created Uniswap v3/v4 trading pools on Arbitrum One within a configurable look-back window, with token metadata, fee tiers, liquidity, and ETH/USDC pairing flags.
- [Arbitrum One NFT Token Metadata](https://www.zero.xyz/c/arbitrum-one-nft-token-metadata-da264005/llms.txt): $0.008/call via x402. Fetches ERC-721/ERC-1155 token metadata on Arbitrum One including collection name, owner, token URI, traits, and a browser-loadable image URL resolved from IPFS, Arweave, HTTPS, or inline data URIs.
- [Base Onchain Balance Checker](https://www.zero.xyz/c/base-onchain-balance-checker-60523845/llms.txt): $0.005/call via x402. Returns the native ETH balance and up to 20 ERC-20 token balances for a given Base wallet address, formatted with symbols and decimals.
- [Base Basename Resolver](https://www.zero.xyz/c/base-basename-resolver-24f80988/llms.txt): $0.005/call via x402. Resolves a Basename (e.g. jesse.base.eth) to its Base wallet address and on-chain profile records including avatar, description, URL, Twitter, and GitHub.
- [Base Gas Conditions Snapshot](https://www.zero.xyz/c/base-gas-conditions-snapshot-29ab9da6/llms.txt): $0.005/call via x402. Returns real-time Base network gas metrics including block number, base fee, gas price, priority fee in gwei, and estimated ETH and USD costs for native and ERC-20 transfers.
- [Base New Trading Pools](https://www.zero.xyz/c/base-new-trading-pools-ac860ff9/llms.txt): $0.01/call via x402. Returns newly created trading pools on Base (Uniswap v3, v4, Aerodrome) from the last N minutes, with token metadata, fee tiers, hooks, and liquidity info.
- [Base NFT Token Metadata Lookup](https://www.zero.xyz/c/base-nft-token-metadata-lookup-778492f5/llms.txt): $0.008/call via x402. Fetches on-chain and off-chain metadata for an ERC-721 or ERC-1155 token on Base, including collection name, owner, token URI, and decoded metadata JSON with a browser-loadable image URL.
- [Canadian Tax & Business Days — Sales Tax Calculator](https://www.zero.xyz/c/canadian-tax-business-days-sales-tax-calculator-81de2939/llms.txt): $0.005/call via x402. Calculates a full Canadian sales tax breakdown (GST, HST, PST, RST, QST) for a given pre-tax CAD amount and province/territory, with rates and amounts current as of a specified date.
- [Canadian Tax & Business Days Calculator](https://www.zero.xyz/c/canadian-tax-business-days-calculator-2d1d95e6/llms.txt): $0.005/call via x402. Calculates the number of business days between two dates for a specified Canadian province or territory, excluding weekends and provincial statutory holidays with observed-day adjustments, and lists all holidays skipped.
- [ECB Currency Rates Converter](https://www.zero.xyz/c/ecb-currency-rates-converter-ae6de72f/llms.txt): $0.005/call via x402. Converts an amount between two currencies using the European Central Bank daily reference rate, returning the rate, converted amount, and rate date.
- [Ethereum NFT Metadata Lookup](https://www.zero.xyz/c/ethereum-nft-metadata-lookup-52ea27ca/llms.txt): $0.008/call via x402. Fetches on-chain and off-chain metadata for an ERC-721 or ERC-1155 NFT on Ethereum, including collection name, owner, token URI, decoded metadata JSON, and a browser-loadable image URL.
- [Ethereum ERC-20 Allowance Checker](https://www.zero.xyz/c/ethereum-erc-20-allowance-checker-4a09d60a/llms.txt): $0.005/call via x402. Returns the ERC-20 token allowance a spender has on Ethereum, including whether it's unlimited, the owner's balance, and the net spendable amount right now.
- [Ethereum Wallet Balance Checker (ETH + ERC-20)](https://www.zero.xyz/c/ethereum-wallet-balance-checker-eth-erc-20-34369207/llms.txt): $0.005/call via x402. Returns the native ETH balance and balances of up to 20 specified ERC-20 tokens for an Ethereum wallet address, read live from the chain.
- [Ethereum Gas Conditions Snapshot](https://www.zero.xyz/c/ethereum-gas-conditions-snapshot-997358ef/llms.txt): $0.005/call via x402. Returns current Ethereum network gas metrics including block number, base fee, gas price, priority fee in gwei, and estimated ETH and USD costs for native and ERC-20 transfers.
- [Ethereum New Trading Pools (Uniswap v3/v4)](https://www.zero.xyz/c/ethereum-new-trading-pools-uniswap-v3-v4-fd0aad4f/llms.txt): $0.01/call via x402. Returns the most recently created Uniswap v3 and v4 trading pools on Ethereum, including token metadata, fee tiers, hooks, ETH/USDC pairing, and quote liquidity.
- [Ethereum ERC-20 Whale & Large-Trade Tracker](https://www.zero.xyz/c/ethereum-erc-20-whale-large-trade-tracker-4ef9c96b/llms.txt): $0.02/call via x402. Returns buy/sell trades, volume, net flow, and top whale wallets for an ERC-20 token on Ethereum Uniswap v3 WETH/USDC pools over a configurable look-back window.
- [ENS Name & Address Resolver (Ethereum)](https://www.zero.xyz/c/ens-name-address-resolver-ethereum-a78f3095/llms.txt): $0.005/call via x402. Resolves an ENS name (e.g. vitalik.eth) to its Ethereum address and profile records, or reverse-resolves an Ethereum address to its primary ENS name and profile.
- [OP Mainnet Onchain Data – Address Inspector](https://www.zero.xyz/c/op-mainnet-onchain-data-address-inspector-03a1e994/llms.txt): $0.005/call via x402. Returns the full onchain profile of any OP Mainnet address: EOA vs contract, token standard, name/symbol, proxy implementation, bytecode size, nonce, and ETH balance.
- [OP Mainnet Transaction Lookup](https://www.zero.xyz/c/op-mainnet-transaction-lookup-ed0645ba/llms.txt): $0.005/call via x402. Returns a human-readable summary of an OP Mainnet transaction including status, block, sender/recipient, ETH value, gas, method selector, and decoded ERC-20 token transfers.
- [OP Mainnet NFT Metadata Lookup](https://www.zero.xyz/c/op-mainnet-nft-metadata-lookup-7aeba6ba/llms.txt): $0.008/call via x402. Fetches full metadata for an ERC-721 or ERC-1155 token on OP Mainnet, including collection name, owner, token URI, and decoded metadata with a browser-loadable image URL.
- [OP Mainnet ERC-20 Allowance Checker](https://www.zero.xyz/c/op-mainnet-erc-20-allowance-check

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