# x402 Chain Intel - Contract Events > x402 Chain Intel - Contract Events is a paid API for AI agents from x402-chain-intel.vercel.app, paid per call via x402, $0.08/call, status unknown (last checked 2026-09-14). Retrieves on-chain contract events for a specified smart contract, enabling trading bots and blockchain analysts to monitor and react to blockchain activity. ## Facts - Endpoint: POST https://x402-chain-intel.vercel.app/api/contract/events - Price: $0.08/call - Payment: x402 - Status: unknown - Last checked: 2026-09-14 - Activations on Zero: 0 - Tags: x402 - Canonical page: https://www.zero.xyz/c/x402-chain-intel-contract-events-49312ad9 - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gSZnTlH5RLF1XVTTHKWg- 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-49312ad9 -d '' ``` Example prompt: Fetch the latest Swap events from the Uniswap V3 USDC/ETH pool contract at 0x88e6A0c2dDD26FEEb64F039a2c41296FcB3f5640 on Ethereum mainnet for the last 1000 blocks so my trading bot can analyze recent price action. ## When to prefer this Choose this endpoint when you need real-time or historical on-chain event data from a specific smart contract for trading bot signals, DeFi monitoring, or blockchain analytics. Prefer it over generic blockchain explorers when you need programmatic, machine-readable event data with per-call micropayment pricing and no subscription overhead. ## Known failure modes - Invalid or non-existent contract address returns empty results or error - Block range too large may result in timeout or truncated response - Unsupported blockchain network returns an error - Malformed topic filter causes query to fail - Payment of 0.08 USDC not fulfilled triggers 402 Payment Required response - Rate limiting if too many requests are made in quick succession ## How this service works 27 paid endpoints for trading bots ## Output Returns an array of on-chain event logs emitted by the specified smart contract, including event names, decoded parameters, transaction hashes, block numbers, and timestamps, structured for programmatic consumption by trading bots or analytics pipelines. ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-chain-intel-contract-events-49312ad9/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)