# Services from biosfera.46-62-215-147.sslip.io on Zero

> biosfera.46-62-215-147.sslip.io serves 32 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/biosfera.46-62-215-147.sslip.io
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/biosfera.46-62-215-147.sslip.io/health.json

## Services

- [x402 Endpoint Probe](https://www.zero.xyz/c/x402-endpoint-probe-17b6a80f/llms.txt): $0.001/call via x402. Probes an x402-protected HTTP endpoint to check reachability, validate its 402 payment challenge, and retrieve accepted networks, assets, price, and pay-to address — without making any payment.
- [Native Coin Balance Lookup (ETH/POL) via eth_getBalance](https://www.zero.xyz/c/native-coin-balance-lookup-eth-pol-via-eth-getbalance-abffba6b/llms.txt): $0.001/call via x402. Returns the exact native coin balance (ETH or POL) of a wallet address on Base, Ethereum, Arbitrum, Optimism, or Polygon, in both raw wei and decimal form with the block number at which it was read.
- [ENS Name Resolver](https://www.zero.xyz/c/ens-name-resolver-3d740ec2/llms.txt): $0.002/call via x402. Resolves ENS names to Ethereum addresses and Ethereum addresses to their primary ENS names by reading the live ENS registry on Ethereum mainnet.
- [Blockchain Transaction Nonce Lookup](https://www.zero.xyz/c/blockchain-transaction-nonce-lookup-6f6fa156/llms.txt): $0.001/call via x402. Returns the confirmed (latest) and pending transaction nonce for a wallet address on Base, Ethereum, Arbitrum, Optimism, or Polygon.
- [ERC-20 Token Allowance Lookup](https://www.zero.xyz/c/erc-20-token-allowance-lookup-ffc86172/llms.txt): $0.001/call via x402. Returns the amount of an ERC-20 token a spender is approved to transfer on behalf of an owner, in both raw units and decimal value, across major EVM chains.
- [Biosfera Storage Slot Reader](https://www.zero.xyz/c/biosfera-storage-slot-reader-580cc76d/llms.txt): $0.001/call via x402. Returns the raw 32-byte value stored at a specific storage slot of a smart contract on Base, Ethereum, Arbitrum, Optimism, or Polygon using eth_getStorageAt
- [ERC-721 Balance Checker (Multi-Chain)](https://www.zero.xyz/c/erc-721-balance-checker-multi-chain-3928ada3/llms.txt): $0.001/call via x402. Returns the number of ERC-721 NFTs a wallet address holds in a given collection on Base, Ethereum, Arbitrum, Optimism, or Polygon.
- [Base Mainnet Transaction Status Checker](https://www.zero.xyz/c/base-mainnet-transaction-status-checker-64b7517c/llms.txt): $0.002/call via x402. Looks up the status, block details, gas usage, and total fee (L2 + L1) for a Base mainnet transaction hash
- [ERC20 Token Balance Lookup](https://www.zero.xyz/c/erc20-token-balance-lookup-766b6350/llms.txt): $0.002/call via x402. Fetches the live ERC20 token balance of a wallet address on Base, Ethereum, Arbitrum, Optimism, or Polygon, returning both raw integer and decimal-adjusted amounts.
- [Base Mainnet ETH & USDC Dual Balance Lookup](https://www.zero.xyz/c/base-mainnet-eth-usdc-dual-balance-lookup-083e0a20/llms.txt): $0.002/call via x402. Returns the live native ETH balance and USDC balance of any EVM address on Base mainnet (chain 8453) in a single call, with exact integer units, human-readable decimals, and the block number at which the data was read.
- [ERC20 Token Total Supply Lookup](https://www.zero.xyz/c/erc20-token-total-supply-lookup-10655c94/llms.txt): $0.0015/call via x402. Fetches the current total supply of any ERC20 token on Base, Ethereum, Arbitrum, Optimism, or Polygon via a live eth_call to the contract's totalSupply function, returning both raw integer and decimal-adjusted amounts.
- [EVM Chain Status (Multi-Network)](https://www.zero.xyz/c/evm-chain-status-multi-network-1d31aad4/llms.txt): $0.001/call via x402. Returns a live snapshot of an EVM chain including chain ID, latest block number, block age in seconds, current gas price, and base fee in gwei for one of five supported networks.
- [ERC-20 Token Metadata Lookup](https://www.zero.xyz/c/erc-20-token-metadata-lookup-c530f2bf/llms.txt): $0.0015/call via x402. Returns name, symbol, decimals, and human-formatted total supply for any ERC-20 token on Base, Ethereum, Arbitrum, Optimism, or Polygon in a single call.
- [Blockchain Event Logs Query](https://www.zero.xyz/c/blockchain-event-logs-query-03a946f4/llms.txt): $0.002/call via x402. Fetches recent on-chain event logs for a smart contract across Base, Ethereum, Arbitrum, Optimism, or Polygon, with optional event signature and block range filtering
- [Biosfera Gas Now — EVM Chain Gas Price Oracle](https://www.zero.xyz/c/biosfera-gas-now-evm-chain-gas-price-oracle-2eb6406f/llms.txt): $0.001/call via x402. Returns current gas prices (legacy price, base fee, priority fee) in gwei for Base, Ethereum, Arbitrum, Optimism, or Polygon, along with the reference block number.
- [Blockchain Gas Estimation API](https://www.zero.xyz/c/blockchain-gas-estimation-api-3499d369/llms.txt): $0.0015/call via x402. Estimates the gas a transaction would consume and its cost at the current gas price on Base, Ethereum, Arbitrum, Optimism, or Polygon.
- [Proxy Implementation Slot Reader](https://www.zero.xyz/c/proxy-implementation-slot-reader-2eddcdcc/llms.txt): $0.0015/call via x402. Reads EIP-1967, ZeppelinOS, and EIP-1822 (UUPS) proxy implementation and admin storage slots on Base, Ethereum, Arbitrum, Optimism, or Polygon to identify upgrade patterns and implementation addresses.
- [ECB Daily Foreign Exchange Rate Lookup](https://www.zero.xyz/c/ecb-daily-foreign-exchange-rate-lookup-f5539e89/llms.txt): $0.001/call via x402. Returns the official European Central Bank daily reference exchange rate between two of 30 major currencies, optionally converting a specific amount.
- [Is-Contract Checker (Multi-Chain EVM)](https://www.zero.xyz/c/is-contract-checker-multi-chain-evm-f79306fb/llms.txt): $0.001/call via x402. Checks whether an EVM address is a deployed smart contract on Base, Ethereum, Arbitrum, Optimism, or Polygon, returning a boolean and bytecode size.
- [US National Weather Service Forecast by Coordinates](https://www.zero.xyz/c/us-national-weather-service-forecast-by-coordinates-3e40d9e1/llms.txt): $0.002/call via x402. Returns the official NWS multi-period weather forecast (temperature, wind, precipitation chance, summary) for any US latitude/longitude coordinate pair.
- [Public Holidays by Country and Year](https://www.zero.xyz/c/public-holidays-by-country-and-year-8697efa2/llms.txt): $0.001/call via x402. Returns official public holidays for a given country and year, including dates, local and English names, nationwide vs regional scope, and whether today is a holiday.
- [Biosfera ETH Call – Read-Only Smart Contract Call](https://www.zero.xyz/c/biosfera-eth-call-read-only-smart-contract-call-d0a30491/llms.txt): $0.0015/call via x402. Executes a read-only eth_call on a specified smart contract across Base, Ethereum, Arbitrum, Optimism, or Polygon, returning raw ABI-encoded return data without sending a transaction.
- [Multi-Chain Transaction Receipt Lookup](https://www.zero.xyz/c/multi-chain-transaction-receipt-lookup-a89c2034/llms.txt): $0.002/call via x402. Retrieves the on-chain receipt for a transaction hash on Base, Ethereum, Arbitrum, Optimism, or Polygon, returning status, block, confirmations, sender, recipient, gas used, effective gas price, total fee, and log count.
- [ERC-721 Tokens Of Owner Lookup](https://www.zero.xyz/c/erc-721-tokens-of-owner-lookup-ab906324/llms.txt): $0.002/call via x402. Returns the token IDs of an ERC-721 NFT collection owned by a specific wallet address on Base, Ethereum, Arbitrum, Optimism, or Polygon, with pagination and total balance.
- [Blockchain Contract Profile Lookup](https://www.zero.xyz/c/blockchain-contract-profile-lookup-9f6713cf/llms.txt): $0.002/call via x402. Returns a comprehensive profile of any smart contract address on major EVM chains, including code size, ERC-20 metadata, NFT standard detection, and proxy implementation details.
- [Blockchain Fee History API](https://www.zero.xyz/c/blockchain-fee-history-api-359f1de4/llms.txt): $0.0015/call via x402. Returns recent base fees, gas used ratios, and 25/50/75 percentile priority fee tips (in gwei) for the last N blocks on Base, Ethereum, Arbitrum, Optimism, or Polygon.
- [ERC-721 Token Owner Lookup](https://www.zero.xyz/c/erc-721-token-owner-lookup-1de5fd25/llms.txt): $0.0015/call via x402. Returns the current owner address of a specific ERC-721 NFT token ID, along with the collection's name and symbol, across Base, Ethereum, Arbitrum, Optimism, and Polygon.
- [USGS Earthquake Feed](https://www.zero.xyz/c/usgs-earthquake-feed-9032ce9e/llms.txt): $0.002/call via x402. Fetches recent worldwide earthquakes from the US Geological Survey, filterable by minimum magnitude, time window, and optional geographic proximity.
- [Blockchain Transaction Lookup by Hash](https://www.zero.xyz/c/blockchain-transaction-lookup-by-hash-731b0a94/llms.txt): $0.002/call via x402. Fetches full transaction details (sender, recipient, value, gas, input data, status) for a given transaction hash on Base, Ethereum, Arbitrum, Optimism, or Polygon.
- [NWS Active Weather Alerts by State or Coordinate](https://www.zero.xyz/c/nws-active-weather-alerts-by-state-or-coordinate-b20be47b/llms.txt): $0.002/call via x402. Returns active National Weather Service alerts (event type, severity, urgency, headline, affected areas, expiry) for a US state code or lat/lon coordinate.
- [Block Header Info — Base, Ethereum, Arbitrum, Optimism, Polygon](https://www.zero.xyz/c/block-header-info-base-ethereum-arbitrum-optimism-polygon-c16ff607/llms.txt): $0.001/call via x402. Returns block header details (hash, parent hash, timestamp, transaction count, gas used/limit, base fee, miner, size) for a given block number or 'latest' on five EVM chains.
- [ERC-1155 Token Balance Query](https://www.zero.xyz/c/erc-1155-token-balance-query-c39b1761/llms.txt): $0.001/call via x402. Returns the number of copies of a specific ERC-1155 token ID held by a given address on Base, Ethereum, Arbitrum, Optimism, or Polygon.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

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