# Services from x402-research-iota.vercel.app on Zero

> x402-research-iota.vercel.app serves 8 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/x402-research-iota.vercel.app
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/x402-research-iota.vercel.app/health.json

## Services

- [Base Address Risk Snapshot](https://www.zero.xyz/c/base-address-risk-snapshot-57fd9f61/llms.txt): $0.03/call via x402. Returns a public-data red-flag snapshot for a Base (chain 8453) address, including contract type, proxy status, source verification, age, activity, ETH/USDC balances, and a risk level rating.
- [x402 Crypto Research API – BTC Signal](https://www.zero.xyz/c/x402-crypto-research-api-btc-signal-fe011f48/llms.txt): $0.003/call via x402. Returns a pay-per-call Bitcoin market brief including current price, RSI-14, a directional score, and a bull/bear signal
- [x402 Crypto Research API – BTC Brief](https://www.zero.xyz/c/x402-crypto-research-api-btc-brief-73aecc39/llms.txt): $0.03/call via x402. Returns a pay-per-call Bitcoin market brief including price, RSI, moving averages, trend signal, and sentiment data
- [x402 Invoice Decode & Validator](https://www.zero.xyz/c/x402-invoice-decode-validator-e0bcb7b9/llms.txt): $0.02/call via x402. Decodes and validates a base64-encoded x402 PAYMENT-REQUIRED header, returning a structured analysis of payment requirements including asset, network, amount, scheme, and overall verdict.
- [x402 Settlement Status Checker](https://www.zero.xyz/c/x402-settlement-status-checker-512a805f/llms.txt): $0.02/call via x402. Verifies an x402 payment settlement transaction on Base (chain 8453) by checking existence, success, USDC transfer events, and confirmation count.
- [x402 Crypto Signal Batch API](https://www.zero.xyz/c/x402-crypto-signal-batch-api-c3448b56/llms.txt): $0.02/call via x402. Returns live trend signals (bullish/neutral/bearish), RSI-14, price, and composite score for up to 10 crypto assets in a single pay-per-call request
- [ERC-20 Approval Enumerator for Base (Chain 8453)](https://www.zero.xyz/c/erc-20-approval-enumerator-for-base-chain-8453-195c9e86/llms.txt): $0.03/call via x402. Lists all live ERC-20 token approvals for a given Base network address, returning token, spender, current allowance, and whether the approval is unlimited.
- [x402 Base Address Preflight Risk Check](https://www.zero.xyz/c/x402-base-address-preflight-risk-check-ea2645ab/llms.txt): $0.05/call via x402. Performs a one-call risk preflight on a Base (chain 8453) address: risk snapshot, live ERC-20 approvals, OFAC SDN sanctions screen, and optional x402 invoice validation, returning a verdict of proceed/review/stop.

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)