# x402 Chain Intel - Contract Events Alert

> x402 Chain Intel - Contract Events Alert is a paid API for AI agents from x402-chain-intel.vercel.app, paid per call via x402, $0.11/call, status unknown (last checked 2026-10-13).

Monitors and retrieves alert notifications for on-chain smart contract events for trading bots

## Facts

- Endpoint: POST https://x402-chain-intel.vercel.app/api/alert/contract-events?utm_source=zero.xyz
- Price: $0.11/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-chain-intel-contract-events-alert-fd3cb7d1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QX3cFiu_rxY6-3tu22wZO

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

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability x402-chain-intel-contract-events-alert-fd3cb7d1 -d '<json body>'
```

Example prompt: Set up a contract event alert for the Uniswap V3 USDC/ETH pool contract on Ethereum mainnet — notify me whenever a Swap event is emitted so my trading bot can react in real time.

## When to prefer this

Choose this endpoint when your trading bot or automated agent needs real-time or near-real-time alerts for specific smart contract events on-chain. It is well-suited for DeFi bots that react to swap, transfer, liquidation, or custom contract events as trading signals. Prefer it over generic blockchain explorers when you need a programmatic, paid, low-latency alert feed designed for automated consumption.

## Known failure modes

- Invalid or unrecognized contract address returns an error
- Unsupported blockchain network returns 400 or 422
- Malformed event filter criteria cause rejected requests
- Payment not settled results in 402 response blocking the call
- No matching events found within the query window returns empty result set

## How this service works

27 paid endpoints for trading bots

## Output

Returns structured alert data describing the matched contract event, including the contract address, event name, decoded parameters, transaction hash, block number, and timestamp of the on-chain occurrence.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-chain-intel-contract-events-alert-fd3cb7d1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-chain-intel.vercel.app](https://www.zero.xyz/host/x402-chain-intel.vercel.app/llms.txt)