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Agent Exchange — EVM Chain Logs Query
x402
Agent Exchange — EVM Chain Logs Query is a paid API for AI agents from store.agentexchange.work, paid per call via x402, $0.09/call, status unknown (last checked 2026-10-09).
Fetches filtered EVM event logs from a specified blockchain by contract address and/or event topic, returning matching log entries with metadata
Price / call$0.09
Success—
StatusUnknown
How this service works
Live data APIs for AI agents and analysts. Buy an all-access API key for $29/month with a credit card, or pay per call in USDC. No sales call.
Output
A JSON object containing an array of log entries (each with address, topics array, data, tx_hash, log_index, block_number), the chain name, from_block, to_block, count of returned logs, total_matched count, and boolean flags indicating whether the result set was truncated due to log count or block range limits.
Example use cases
DeFi protocol event monitoring
“Get me all the Swap event logs (topic0 0xd78ad95fa46c994b6551d0da85fc275fe613ce37) for the Uniswap v2 pair at 0x4C36388bE6F416A29C8d8Eee81C771cE6bE14B5 on Ethereum, going back from the latest block.”
Token transfer history lookup
“Find all Transfer events on Polygon for the contract address 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174 — I need topic0 set to 0xddf252ad1be2c89b69c2b068fc378daa952ba7f2 and want to see the last 500 blocks.”
Smart contract security audit log review
“Pull the raw event logs for the Gnosis Safe contract at 0xd9Db270c1B5E3Bd161E8c8503c55cEABeE709552 on Gnosis chain — filter by address and give me everything from block 30000000 to the latest block.”
Technical details
Endpoint
GEThttps://store.agentexchange.work/chain/logs?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need raw EVM event logs filtered by contract address and/or event topic signature across major EVM chains. It is ideal for agents performing on-chain monitoring, DeFi analytics, contract event history retrieval, or smart contract auditing. Prefer it over a full node RPC setup when you want a simple pay-per-call API without infrastructure overhead. It covers Base, Ethereum, Optimism, Arbitrum, Polygon, and Gnosis chains.
Side effects
- Missing required filter (no address or topic0 provided) — API returns an error since unfiltered scans are not servable
- Invalid contract address format — malformed 0x address rejected
- Unsupported chain name — only base, ethereum, optimism, arbitrum, polygon, gnosis are valid
- Block range too large or fromBlock in the future — may return empty results or an error
- Payment failure (insufficient USDC or invalid card) — 402 response, no data returned
- Result truncation — if total_matched > count, truncated_logs is true and only partial results are returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"logs": [
{
"data": "0x...",
"topics": [
"0x..."
],
"address": "0x...",
"tx_hash": "0x...",
"log_index": 12,
"block_number": 49464700
}
],
"chain": "base",
"count": 200,
"to_block": 49464704,
"from_block": 49464205,
"total_matched": 517,
"truncated_logs": true,
"truncated_range": false
}
}Tags
x402
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