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Base ETH Logs
x402
Base ETH Logs is a paid API for AI agents from ari001.tailb4ac3a.ts.net, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-10).
Fetches Ethereum event logs (eth_getLogs) for a contract address on the Base network, with optional event topic and block range filtering.
Price / call$0.005
Success—
StatusUnknown
How this service works
Event logs on Base: takes address (contract, 0x + 40 hex), optional topic0 (event signature hash, 0x + 64 hex) and optional blocks (last N blocks, 1-100, default 10), and returns the matching eth_get…
Output
Returns an array of matching eth_getLogs entries from Base, each containing the contract address, transaction hash, block number, log index, topics array, and hex-encoded data payload — mirroring the standard Ethereum JSON-RPC eth_getLogs response structure.
Example use cases
Monitor DeFi pool swap events
“Get me the last 50 blocks of Swap event logs from the Uniswap V3 pool at 0x4C36388bE6F416A29C8d8Eee81C771cE6bE14B18 on Base — filter by topic0 0xc42079f94a6350d7e6235f29174924f928cc2ac818eb64fed8004e115fbcca67.”
Audit ERC-20 transfers for a token
“Fetch the last 10 blocks of Transfer event logs for the USDC contract on Base at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, using topic0 0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef.”
Debug recent contract activity
“Show me all the on-chain event logs emitted by the contract at 0x68b3465833fb72A70ecDF485E0e4C7bD8665Fc45 on Base for the last 5 blocks so I can see what functions were triggered recently.”
Technical details
Endpoint
GEThttps://ari001.tailb4ac3a.ts.net/v1/ventures/x402_chain_reads_v1/base_eth_getlogs?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need raw on-chain event logs from Base L2 contracts and can filter by event signature (topic0). It is ideal for monitoring DeFi activity, auditing ERC-20 transfers, debugging contract events, or building reactive agents that act on on-chain state changes. Prefer this over transaction receipt lookups when you want bulk event scanning across a block range rather than a single transaction's logs.
Side effects
- Invalid contract address format (not 0x + 40 hex) returns validation error
- Invalid topic0 format (not 0x + 64 hex) returns validation error
- blocks value outside 1-100 range rejected
- Contract address has no logs in the requested block range — returns empty array
- RPC node unavailability or Base network issues cause 5xx errors
- Payment of $0.005 USDC not provided or invalid causes 402 payment required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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