# Services from api402x.com on Zero

> api402x.com serves 12 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/api402x.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/api402x.com/health.json

## Services

- [Aave V3 wstETH Depeg Liquidation Exposure Analyzer](https://www.zero.xyz/c/aave-v3-wsteth-depeg-liquidation-exposure-analyzer-9a4d5f9e/llms.txt): $0.005/call via x402. Computes the stETH secondary-market depeg percentage at which an Aave V3 borrower position becomes liquidatable — a risk Aave's own health factor does not surface.
- [Gnosis Safe Spending Authority Drift Detector](https://www.zero.xyz/c/gnosis-safe-spending-authority-drift-detector-8cb9b25a/llms.txt): $0.005/call via x402. Reads a Gnosis Safe's current owner set, threshold, modules, and guard from chain, then compares against its state at an earlier block to detect and pinpoint any changes in spending authority.
- [APIX402 Insider Early Sale Check](https://www.zero.xyz/c/apix402-insider-early-sale-check-b1166841/llms.txt): $0.05/call via x402. Detects early token sales by scanning a vesting plan beneficiary's full on-chain transfer history and flagging any outgoing transfers that occurred before the cliff date
- [APIX402 Vesting Plan On-Chain Status Reader](https://www.zero.xyz/c/apix402-vesting-plan-on-chain-status-reader-45bbc667/llms.txt): $0.003/call via x402. Reads live vesting plan or stream data directly from Hedgey or Sablier contracts on Base, returning total, claimable, and unvested balances with on-chain verification.
- [APIX402 Oracle Staleness Checker (Base)](https://www.zero.xyz/c/apix402-oracle-staleness-checker-base-ac8ea3c4/llms.txt): $0.003/call via x402. Reports the real-time staleness of Chainlink and Pyth oracle prices on Base, with per-feed staleness bounds and a Chainlink-vs-Pyth spread contextualized against Pyth's own confidence interval.
- [Safe Authority Fingerprint Check](https://www.zero.xyz/c/safe-authority-fingerprint-check-bb3c986e/llms.txt): $0.002/call via x402. Cheaply polls whether the spending authority of a Gnosis Safe has changed by comparing a stored fingerprint against the current on-chain state.
- [Hedgey Vesting Plan Control Change Detector](https://www.zero.xyz/c/hedgey-vesting-plan-control-change-detector-75996c40/llms.txt): $0.002/call via x402. Polls a Hedgey vesting plan on Base for changes to vesting admin, adminTransferOBO flag, and NFT ownership, distinguishing real authority changes from normal plan-closed events.
- [x402 Listing Drift Checker](https://www.zero.xyz/c/x402-listing-drift-checker-57b6e295/llms.txt): $0.002/call via x402. Checks whether a catalogued x402 resource's live payment terms (price, network, payTo) match the advertised listing, and detects dead origins or oversized response headers that would prevent payment.
- [DAO Proposal State Change Checker](https://www.zero.xyz/c/dao-proposal-state-change-checker-2f174bac/llms.txt): $0.002/call via x402. Cheaply polls whether a DAO governance proposal's on-chain state has changed since the last check, and tells you when it's safe to stop polling.
- [DAO Governance Proposals Feed](https://www.zero.xyz/c/dao-governance-proposals-feed-d781a954/llms.txt): $0.005/call via x402. Returns active and recent governance proposals across major DAOs with onchain and Snapshot voting data, vote counts, and status.
- [DAO Proposal Execution Status Tracker](https://www.zero.xyz/c/dao-proposal-execution-status-tracker-377d02ac/llms.txt): $0.003/call via x402. Returns the post-vote execution fate of a single DAO governance proposal — whether it has been executed, queued in Timelock, expired, or cancelled — for ENS, Arbitrum, Uniswap, or Compound.
- [api402x Echo – Connectivity Test Endpoint](https://www.zero.xyz/c/api402x-echo-connectivity-test-endpoint-eac39383/llms.txt): $0.001/call via x402. Returns a simple liveness ping (ok: true + timestamp) to verify the api402x service is reachable and the x402 payment flow is working correctly.

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)