# Services from ca-tax-api-mainnet.lxtap.workers.dev on Zero

> ca-tax-api-mainnet.lxtap.workers.dev serves 54 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/ca-tax-api-mainnet.lxtap.workers.dev
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/ca-tax-api-mainnet.lxtap.workers.dev/health.json

## Services

- [Ethereum ERC-20 Token Due-Diligence Snapshot](https://www.zero.xyz/c/ethereum-erc-20-token-due-diligence-snapshot-8e8f5d8a/llms.txt): $0.01/call via x402. Returns a comprehensive due-diligence snapshot of an Ethereum ERC-20 token including metadata, ownership status, proxy/upgradeability detection, dangerous owner-only functions, and Uniswap v3 price/liquidity data.
- [Solana Onchain Token Due-Diligence Snapshot](https://www.zero.xyz/c/solana-onchain-token-due-diligence-snapshot-1f6133d5/llms.txt): $0.01/call via x402. Returns a comprehensive due-diligence snapshot of a Solana SPL or Token-2022 token including metadata, supply, authorities, Token-2022 controls, holder concentration, and market data from Jupiter and DexScreener.
- [Arbitrum One Address Inspector](https://www.zero.xyz/c/arbitrum-one-address-inspector-ebc281e0/llms.txt): $0.005/call via x402. Identifies and classifies any Arbitrum One address, returning account type, token standard, name/symbol, proxy details, bytecode size, nonce, and ETH balance.
- [Arbitrum One ERC-20 Token Due-Diligence Snapshot](https://www.zero.xyz/c/arbitrum-one-erc-20-token-due-diligence-snapshot-3ee90677/llms.txt): $0.01/call via x402. Returns a due-diligence snapshot of an ERC-20 token on Arbitrum One, including metadata, ownership, upgrade/proxy risk flags, dangerous owner-only functions, and Uniswap v3 price/liquidity data.
- [Arbitrum One Wallet Balance Checker](https://www.zero.xyz/c/arbitrum-one-wallet-balance-checker-7f7ef26c/llms.txt): $0.005/call via x402. Returns the native ETH balance of an Arbitrum One wallet address plus the balances of up to 20 specified ERC-20 tokens, formatted with each token's symbol and decimals.
- [Arbitrum One NFT Token Metadata](https://www.zero.xyz/c/arbitrum-one-nft-token-metadata-fffe14f6/llms.txt): $0.008/call via x402. Fetches on-chain and off-chain metadata for an ERC-721 or ERC-1155 NFT on Arbitrum One, including collection name, owner, token URI, and decoded metadata JSON with a browser-loadable image URL.
- [Arbitrum One ERC-20 Allowance Checker](https://www.zero.xyz/c/arbitrum-one-erc-20-allowance-checker-a4063d85/llms.txt): $0.005/call via x402. Returns the ERC-20 token allowance on Arbitrum One: how much a spender may transfer from an owner, whether the approval is unlimited, the owner's current balance, and the actual transferable amount.
- [Arbitrum One Gas Conditions](https://www.zero.xyz/c/arbitrum-one-gas-conditions-2863a47c/llms.txt): $0.005/call via x402. Returns current Arbitrum One gas metrics (block number, base fee, gas price, priority fee) plus estimated ETH and USD cost for a native transfer and an ERC-20 transfer.
- [Arbitrum One Transaction Lookup](https://www.zero.xyz/c/arbitrum-one-transaction-lookup-3658dadf/llms.txt): $0.005/call via x402. Returns a human-readable summary of an Arbitrum One transaction including status, block, time, sender, recipient, ETH value, gas details, method selector, and decoded ERC-20 transfers.
- [Arbitrum One ERC-20 Whale & Large-Trade Tracker](https://www.zero.xyz/c/arbitrum-one-erc-20-whale-large-trade-tracker-722188ea/llms.txt): $0.02/call via x402. Returns recent large buys and sells of an ERC-20 token on Arbitrum One's deepest Uniswap v3 WETH/USDC pools, with USD size, side, wallet, transaction, buy/sell volume, net flow, and top traders.
- [Base Mainnet Wallet Balance Checker](https://www.zero.xyz/c/base-mainnet-wallet-balance-checker-2ed76e1b/llms.txt): $0.005/call via x402. Returns the native ETH balance and up to 20 ERC-20 token balances for a given wallet address on Base mainnet, formatted with each token's symbol and decimals.
- [Base Gas Conditions](https://www.zero.xyz/c/base-gas-conditions-e8bcff6e/llms.txt): $0.005/call via x402. Returns current Base network gas conditions including block number, base fee, gas price, priority fee in gwei, and estimated ETH and USD costs for ETH and ERC-20 transfers.
- [Base Transaction Lookup](https://www.zero.xyz/c/base-transaction-lookup-2860e1ea/llms.txt): $0.005/call via x402. Returns a human-readable summary of a Base blockchain transaction including status, block, time, sender, recipient, ETH value, gas usage, fee, method selector, and decoded ERC-20 transfers.
- [Base Basename Resolver](https://www.zero.xyz/c/base-basename-resolver-94a922b6/llms.txt): $0.005/call via x402. Resolves a Basename (e.g. jesse.base.eth) to its Base wallet address and associated profile records including avatar, description, URL, Twitter, and GitHub.
- [Base Onchain Data – Address Type & Contract Metadata](https://www.zero.xyz/c/base-onchain-data-address-type-contract-metadata-4a35ed3b/llms.txt): $0.005/call via x402. Identifies whether a Base address is a wallet (EOA) or contract, and returns token standard, name, symbol, proxy details, bytecode size, nonce, and ETH balance.
- [Base NFT Token Metadata Lookup](https://www.zero.xyz/c/base-nft-token-metadata-lookup-26897633/llms.txt): $0.008/call via x402. Fetches full metadata for an ERC-721 or ERC-1155 token on Base: collection name, owner, token URI, and decoded metadata JSON (including a browser-loadable image URL) from IPFS, Arweave, HTTPS, or inline data URIs.
- [Base Token Due-Diligence Snapshot](https://www.zero.xyz/c/base-token-due-diligence-snapshot-b5bdebcb/llms.txt): $0.01/call via x402. Returns a due-diligence snapshot of an ERC-20 token on Base: contract metadata, ownership/upgradeability risk flags, owner-only function detection, and DEX price/liquidity/FDV data.
- [Base Onchain Data – ERC-20 Whale & Large Trade Tracker](https://www.zero.xyz/c/base-onchain-data-erc-20-whale-large-trade-tracker-43531fb2/llms.txt): $0.02/call via x402. Returns all large buys and sells for an ERC-20 token on Base in the last N minutes, with USD size, side, wallet, net flow, and top whale wallets from the deepest WETH/USDC pools.
- [Canadian Sales Tax Calculator](https://www.zero.xyz/c/canadian-sales-tax-calculator-8897617b/llms.txt): $0.005/call via x402. Returns a province-specific Canadian sales tax breakdown (GST, HST, PST, RST, or QST) for a given CAD amount and date, with each component's rate and rounded cent amount plus the total.
- [Canadian Statutory Holidays by Province](https://www.zero.xyz/c/canadian-statutory-holidays-by-province-ed833ac9/llms.txt): $0.01/call via x402. Returns the list of statutory (public) holidays for a specified Canadian province or territory in a given year, including local names, exact dates, and observed weekday adjustments for weekend-falling holidays.
- [Canadian Tax & Business Days Calculator](https://www.zero.xyz/c/canadian-tax-business-days-calculator-0dd2f671/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.
- [ECB Currency Rates Converter](https://www.zero.xyz/c/ecb-currency-rates-converter-acf60916/llms.txt): $0.005/call via x402. Converts a currency amount between two ISO 4217 currencies using the European Central Bank daily reference rate, returning the rate used, converted result, and effective rate date.
- [ECB Currency Rates](https://www.zero.xyz/c/ecb-currency-rates-b1c010bc/llms.txt): $0.005/call via x402. Returns European Central Bank daily foreign exchange reference rates for ~30 major currencies, from any base currency, for the latest available date or a specific past date.
- [Ethereum Onchain Data – Address Type & Contract Metadata](https://www.zero.xyz/c/ethereum-onchain-data-address-type-contract-metadata-725bd07f/llms.txt): $0.005/call via x402. Identifies what lives at an Ethereum address: EOA wallet, EIP-7702 delegation, or contract, including token standard, name/symbol, proxy info, bytecode size, nonce, and ETH balance.
- [ENS Name & Address Resolver](https://www.zero.xyz/c/ens-name-address-resolver-f955f886/llms.txt): $0.005/call via x402. Resolves an ENS name (e.g. vitalik.eth) to its Ethereum address and profile records, or performs a reverse lookup from an address to its primary ENS name.
- [Ethereum Transaction Decoder](https://www.zero.xyz/c/ethereum-transaction-decoder-69270f11/llms.txt): $0.005/call via x402. Returns a human-readable summary of an Ethereum transaction including status, block, timestamp, sender/recipient, ETH value, gas usage, fee, method selector, and decoded ERC-20 token transfers.
- [Ethereum Gas Price & Transfer Cost Estimator](https://www.zero.xyz/c/ethereum-gas-price-transfer-cost-estimator-405d6997/llms.txt): $0.005/call via x402. Returns current Ethereum network gas conditions including block number, base fee, gas price, priority fee in gwei, and estimated ETH and USD costs for native ETH and ERC-20 transfers using Chainlink ETH/USD pricing.
- [Ethereum ERC-20 Allowance Checker](https://www.zero.xyz/c/ethereum-erc-20-allowance-checker-509099ee/llms.txt): $0.005/call via x402. Returns the ERC-20 token allowance a spender has from an owner on Ethereum mainnet, including whether it is effectively unlimited, the owner's balance, and the transferable amount.
- [Ethereum Onchain Large-Trade & Whale Tracker](https://www.zero.xyz/c/ethereum-onchain-large-trade-whale-tracker-7afe7e16/llms.txt): $0.02/call via x402. Fetches recent large buys and sells of an ERC-20 token on Ethereum's deepest Uniswap v3 WETH/USDC pools, with USD size, trade side, wallet addresses, net flow, and top whale wallets.
- [Ethereum NFT Token Metadata](https://www.zero.xyz/c/ethereum-nft-token-metadata-75e48c66/llms.txt): $0.008/call via x402. Fetches on-chain and off-chain metadata for an ERC-721 or ERC-1155 token on Ethereum mainnet, including collection name, owner, token URI, and fully resolved metadata JSON with a browser-loadable image URL.
- [Ethereum Onchain Balance Checker](https://www.zero.xyz/c/ethereum-onchain-balance-checker-a1ef866f/llms.txt): $0.005/call via x402. Returns the native ETH balance of an Ethereum wallet plus balances of up to 20 specified ERC-20 tokens, formatted with each token's symbol and decimals, read live from Ethereum mainnet.
- [OP Mainnet ERC-20 Token Due-Diligence Snapshot](https://www.zero.xyz/c/op-mainnet-erc-20-token-due-diligence-snapshot-839ebbe7/llms.txt): $0.01/call via x402. Returns a security and market due-diligence snapshot for any ERC-20 token on Optimism (OP Mainnet), including metadata, ownership status, proxy/upgradeability detection, dangerous owner-only functions, and live price/liquidity data.
- [OP Mainnet Transaction Lookup](https://www.zero.xyz/c/op-mainnet-transaction-lookup-341e3915/llms.txt): $0.005/call via x402. Returns a human-readable summary of an OP Mainnet transaction including status, block, time, sender, recipient, ETH value, gas, fee, method selector, and decoded ERC-20 transfers.
- [OP Mainnet Wallet Balance Lookup](https://www.zero.xyz/c/op-mainnet-wallet-balance-lookup-9d826080/llms.txt): $0.005/call via x402. Returns the native ETH balance and up to 20 ERC-20 token balances for a given OP Mainnet wallet address, formatted with each token's symbol and decimals.
- [OP Mainnet ERC-20 Whale & Large-Trade Tracker](https://www.zero.xyz/c/op-mainnet-erc-20-whale-large-trade-tracker-bfcab401/llms.txt): $0.02/call via x402. Returns every significant buy and sell of an ERC-20 token on OP Mainnet's deepest WETH/USDC pools over a configurable look-back window, with USD size, wallet, transaction, volume totals, net flow, and top buyers/sellers.
- [OP Mainnet ERC-20 Allowance Lookup](https://www.zero.xyz/c/op-mainnet-erc-20-allowance-lookup-a3f9f1cd/llms.txt): $0.005/call via x402. Returns the ERC-20 token allowance on OP Mainnet, including how much a spender may transfer from an owner, whether the approval is unlimited, the owner's current balance, and the transferable amount.
- [OP Mainnet NFT Metadata Lookup](https://www.zero.xyz/c/op-mainnet-nft-metadata-lookup-e15078ed/llms.txt): $0.008/call via x402. Fetches on-chain and off-chain metadata for an ERC-721 or ERC-1155 NFT on OP Mainnet, including collection name, owner, token URI, decoded metadata JSON, and a browser-loadable image URL.
- [OP Mainnet Onchain Data – Address Inspector](https://www.zero.xyz/c/op-mainnet-onchain-data-address-inspector-5421429b/llms.txt): $0.005/call via x402. Inspects any OP Mainnet address to classify it as a wallet or contract and returns token standard, name, symbol, proxy details, bytecode size, nonce, and ETH balance.
- [OP Mainnet Gas Conditions](https://www.zero.xyz/c/op-mainnet-gas-conditions-01f7c7c9/llms.txt): $0.005/call via x402. Returns current Optimism Mainnet gas metrics including block number, base fee, gas price, priority fee in gwei, and estimated ETH/USD cost of native and ERC-20 transfers.
- [Polygon PoS Onchain Data](https://www.zero.xyz/c/polygon-pos-onchain-data-b39835d8/llms.txt): $0.005/call via x402. Identifies and classifies any Polygon PoS address — returning whether it is a wallet or contract, token standard, name/symbol, proxy details, bytecode size, nonce, and POL balance.
- [Polygon PoS NFT Metadata Lookup](https://www.zero.xyz/c/polygon-pos-nft-metadata-lookup-b4538943/llms.txt): $0.008/call via x402. Fetches full metadata for an ERC-721 or ERC-1155 NFT on Polygon PoS, including collection name, owner, token URI, and decoded metadata JSON with a browser-loadable image URL.
- [Polygon PoS Large-Trade & Whale Tracker](https://www.zero.xyz/c/polygon-pos-large-trade-whale-tracker-05c1f2d5/llms.txt): $0.02/call via x402. Returns all large buys and sells of an ERC-20 token on Polygon PoS over a configurable look-back window, with USD size, wallet, transaction, volume aggregates, and top whale wallets.
- [Polygon PoS Transaction Lookup](https://www.zero.xyz/c/polygon-pos-transaction-lookup-d5209bf1/llms.txt): $0.005/call via x402. Returns a human-readable summary of a Polygon PoS transaction including status, block, time, sender, recipient, POL value, gas details, method selector, and decoded ERC-20 transfers.
- [Polygon PoS ERC-20 Token Due-Diligence Snapshot](https://www.zero.xyz/c/polygon-pos-erc-20-token-due-diligence-snapshot-a543f08b/llms.txt): $0.01/call via x402. Returns a comprehensive due-diligence snapshot of an ERC-20 token on Polygon PoS, including metadata, ownership, proxy/upgradeability status, risky owner-only functions, and live USD price/liquidity/FDV from Uniswap v3.
- [Polygon PoS Wallet Balance Checker](https://www.zero.xyz/c/polygon-pos-wallet-balance-checker-0ae9e15e/llms.txt): $0.005/call via x402. Returns the native POL balance and up to 20 ERC-20 token balances for a given Polygon PoS wallet address, with symbols and decimals applied.
- [Arbitrum One New Trading Pools](https://www.zero.xyz/c/arbitrum-one-new-trading-pools-05ad70cc/llms.txt): $0.01/call via x402. Returns newly created Uniswap v3/v4 trading pools on Arbitrum One within a configurable look-back window, including token metadata, fee tiers, hook addresses, and liquidity details.
- [Base ERC-20 Allowance Checker](https://www.zero.xyz/c/base-erc-20-allowance-checker-c71fbbf3/llms.txt): $0.005/call via x402. Returns the ERC-20 token allowance a spender has from an owner on Base, including whether it is effectively unlimited, the owner's current balance, and the spendable amount right now.
- [Polygon PoS Gas Conditions API](https://www.zero.xyz/c/polygon-pos-gas-conditions-api-2f8c5781/llms.txt): $0.005/call via x402. Returns current Polygon PoS network gas conditions including block number, base fee, gas price, priority fee in gwei, and estimated transfer costs in POL and USD.
- [Base New Trading Pools](https://www.zero.xyz/c/base-new-trading-pools-ba81486f/llms.txt): $0.01/call via x402. Returns newly created trading pools on Base (Uniswap v4, Uniswap v3, Aerodrome) within a configurable

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