# Services from basebrief-x402.savannah-5966.chatgpt.site on Zero

> basebrief-x402.savannah-5966.chatgpt.site serves 4 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/basebrief-x402.savannah-5966.chatgpt.site
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/basebrief-x402.savannah-5966.chatgpt.site/health.json

## Services

- [BaseBrief x402 – ERC-20 Token Allowance Lookup](https://www.zero.xyz/c/basebrief-x402-erc-20-token-allowance-lookup-db79512b/llms.txt): $0.004/call via x402. Returns the current ERC-20 token allowance granted by an owner address to a spender address on Base mainnet, charged at $0.004 USDC per call via x402.
- [BaseBrief x402 — Base Address State (Gas, Balances, Tokens, Allowances)](https://www.zero.xyz/c/basebrief-x402-base-address-state-gas-balances-tokens-allowances-0bb7a93d/llms.txt): $0.004/call via x402. Returns point-in-time on-chain state for a Base mainnet address: ETH/token balances, gas data, token metadata, and ERC-20 allowances.
- [BaseBrief x402 – Base Chain Token State Lookup](https://www.zero.xyz/c/basebrief-x402-base-chain-token-state-lookup-60773250/llms.txt): $0.004/call via x402. Returns gas prices, token balances, token metadata, and allowances for a given Base mainnet address, charged at $0.004 per call via x402.
- [BaseBrief x402 – Base Chain Gas Oracle](https://www.zero.xyz/c/basebrief-x402-base-chain-gas-oracle-beca6f99/llms.txt): $0.004/call via x402. Returns real-time gas prices, wallet balances, token metadata, and ERC-20 allowances from the Base mainnet blockchain for $0.004 per call.

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)