# Services from api.x402risk.com on Zero

> api.x402risk.com serves 6 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/api.x402risk.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/api.x402risk.com/health.json

## Services

- [Base Pre-Trade Sellability Check](https://www.zero.xyz/c/base-pre-trade-sellability-check-d96307af/llms.txt): $0.02/call via x402. Simulates a buy, transfer, and sell of a Base ERC-20 token on live chain state to detect honeypots, hidden taxes, and sell restrictions before a real trade.
- [Base Pay-To Address Screen](https://www.zero.xyz/c/base-pay-to-address-screen-72d74a6d/llms.txt): $0.005/call via x402. Screens a Base (EVM) address against OFAC SDN sanctions, detects address-poisoning lookalikes, checks contract vs EOA status, and returns a block/caution/ok verdict with labels and risk reasons.
- [Base Token Risk Check](https://www.zero.xyz/c/base-token-risk-check-35f6245d/llms.txt): $0.01/call via x402. Analyzes a Base chain ERC-20 token contract address and returns deterministic on-chain risk flags, liquidity data, holder concentration, and a rule-based risk level for $0.01 USDC per call.
- [Base Pre-Trade Sellability Check Batch](https://www.zero.xyz/c/base-pre-trade-sellability-check-batch-f9ba0f17/llms.txt): $0.15/call via x402. Batch-simulates buy, transfer, and sell transactions for up to 10 Base ERC-20 tokens to detect honeypots, high tax traps, and liquidity issues before trading.
- [Base Token Risk Check Batch (x402)](https://www.zero.xyz/c/base-token-risk-check-batch-x402-3eb81fbe/llms.txt): $0.08/call via x402. Checks up to 10 Base ERC-20 token contract addresses at once for on-chain risk flags and returns a deterministic rule-based risk level for each.
- [Base Batch Address Screen (x402)](https://www.zero.xyz/c/base-batch-address-screen-x402-aa5fc224/llms.txt): $0.08/call via x402. Screens up to 25 Base EVM addresses in a single call against the OFAC SDN list and flags lookalike/address-poisoning matches, returning a verdict per address.

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)