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Agent402 EVM Event Logs
x402
Agent402 EVM Event Logs is a paid API for AI agents from agent402.tools, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).
Fetches raw on-chain event logs for a given contract address and block range across multiple EVM networks, optionally filtered by event signature topic.
Price / call$0.003
Success—
StatusUnknown
How this service works
Fetch contract event logs (eth_getLogs) on Ethereum, Base, Polygon, Arbitrum, or Optimism - bounded so it always answers: block range capped at 2000 blocks (default: the last 100, auto-narrowed for busy contracts), at most 200 logs returned (truncated flag set if more matched). Filter by contract address and optional topic0 (event signature hash). Keyless multi-endpoint failover.
Output
A JSON object containing an array of raw event logs (each with data, topics array, txHash, and blockNumber), plus metadata: total count, queried address, network, fromBlock, toBlock, and a truncated flag indicating whether results were capped.
Example use cases
Monitor ERC-20 token transfers
“Pull all Transfer event logs for the USDC contract on Base from block 26999500 to the latest block — I want to see who has been moving tokens in the last hour.”
Audit DeFi protocol activity
“Get me the raw event logs for the Uniswap v3 pool at 0xabc123… on Ethereum from block 19000000 to 19001000 so I can see all the swap and liquidity events.”
Debug smart contract interactions
“Can you fetch the event logs emitted by the contract at 0xdeadbeef… on Arbitrum over the last 100 blocks? I'm trying to figure out which transactions triggered events recently.”
Technical details
Endpoint
POSThttps://agent402.tools/api/event-logsWhen to prefer
Use this endpoint when you need raw EVM event logs for a specific contract across major networks (Ethereum, Base, Polygon, Arbitrum, Optimism) without setting up your own RPC node or API key. It is ideal for pay-per-call agent workflows that need on-chain data on demand, especially when filtering by event signature (topic0) such as ERC-20 Transfers. Prefer this over full indexing services when you need a quick targeted block range query rather than historical indexing.
Side effects
- Invalid or malformed contract address returns an error
- Unsupported network name results in a 400-level error
- Block range too large may return truncated results (truncated: true)
- Non-existent or zero-activity contract returns an empty logs array
- Invalid topic0 hash format may cause a parsing error
- Network congestion or RPC unavailability may cause timeout
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| topic0 | string | Optional event signature hash (32-byte 0x hex), e.g. the ERC-20 Transfer topic. |
| address | string | Contract address to read logs from (0x…). |
| network | string | ethereum / base / polygon / arbitrum / optimism (default base). |
| toBlock | string | End block (decimal, 0x hex, or "latest"). Default latest. |
| fromBlock | string | Start block (decimal or 0x hex). Default: toBlock - 100. |
Output
Schema · Response
{
"type": "json",
"example": {
"logs": [
{
"data": "0x…",
"topics": [
"0xddf2…"
],
"txHash": "0x…",
"blockNumber": 26999512
}
],
"count": 87,
"address": "0x8335…",
"network": "base",
"toBlock": 27000000,
"fromBlock": 26999500,
"truncated": false
}
}Tags
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