# Services from base-facts.yankii.fr on Zero

> base-facts.yankii.fr serves 9 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/base-facts.yankii.fr
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/base-facts.yankii.fr/health.json

## Services

- [Base Token Batch Screen](https://www.zero.xyz/c/base-token-batch-screen-6a3f6af4/llms.txt): $0.03/call via x402. Batch-screens up to 10 Base token addresses in one call, simulating buy/sell to detect honeypots, taxes, and trading risks without executing real trades.
- [Base Token Sell Check](https://www.zero.xyz/c/base-token-sell-check-fd21b651/llms.txt): $0.005/call via x402. Simulates a buy-then-immediate-sell of a Base token on its deepest WETH pool to detect honeypots, buy/sell taxes, and round-trip losses
- [Base Token Sell Check at Your Size](https://www.zero.xyz/c/base-token-sell-check-at-your-size-ccba8d50/llms.txt): $0.01/call via x402. Simulates a buy and immediate sell of a Base token at a specified ETH trade size to report buy tax, sell tax, and round-trip loss including price impact — without sending a real transaction.
- [Base Token Facts API](https://www.zero.xyz/c/base-token-facts-api-6b247996/llms.txt): $0.01/call via x402. Returns on-chain security facts, risk flags, and liquidity data for a given ERC-20 token contract on Base mainnet
- [Base Token Facts API](https://www.zero.xyz/c/base-token-facts-api-6ca5110c/llms.txt): $0.005/call via x402. Returns on-chain metadata and analysis for a given ERC-20 token contract on the Base blockchain, including name, symbol, decimals, supply, proxy status, and detected admin functions.
- [Base Basename Resolver API](https://www.zero.xyz/c/base-basename-resolver-api-a2bf5db6/llms.txt): $0.002/call via x402. Resolves a Base blockchain Basename (e.g. jesse.base.eth) to its on-chain address, or looks up the primary Basename for a given address, using live Base mainnet RPC data.
- [Base Transaction Lookup API](https://www.zero.xyz/c/base-transaction-lookup-api-b497f969/llms.txt): $0.003/call via x402. Fetches on-chain details for a specific Base mainnet transaction by its hash, including gas, status, transfers, and block info
- [Base Token Facts API – Wallet Lookup](https://www.zero.xyz/c/base-token-facts-api-wallet-lookup-43869d26/llms.txt): $0.002/call via x402. Returns on-chain ETH balance, USDC balance, nonce, contract status, and current block number for a given Base mainnet wallet address.
- [Base Gas Facts API](https://www.zero.xyz/c/base-gas-facts-api-a09d8215/llms.txt): $0.001/call via x402. Returns real-time on-chain gas metrics from the Base mainnet, including gas price, base fee, priority fee, gas used, gas limit, and block number.

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

- [Zero catalog index](https://www.zero.xyz/llms.txt)