chain.openverbs.com – eth_getLogs Contract Event Logs

x402

chain.openverbs.com – eth_getLogs Contract Event Logs is a paid API for AI agents from chain.openverbs.com, paid per call via x402, $0.006/call, status unknown (last checked 2026-10-29).

Fetches raw and auto-decoded event logs for a specific contract address over a bounded block range on EVM chains, with optional topic filtering.

Price / call$0.006

Seller volume →—

Success—

StatusUnknown

Output

Returns an array of log objects, each containing: topics array (raw 32-byte hex), data field, block number, transaction hash, log index, and contract address. ERC-20/721 Transfer logs are automatically decoded into a structured {from, to, value} object alongside the raw data. Results are capped by the limit parameter and block span is clamped to a maximum window.

Example use cases

Track ERC-20 token transfers

“Get me the last 1000 Transfer events from the USDT contract at 0xdAC17F958D2ee523a2206206994597C13D831ec7 on Ethereum, from block 19000000 to latest, so I can see who's been moving tokens around.”

Monitor NFT mints on Base

“Fetch the event logs for the NFT contract 0x1234567890abcdef1234567890abcdef12345678 on Base from block 12500000 to 12505000, filtering by the Transfer topic to catch any mints or transfers.”

Audit contract activity on Arbitrum

“Pull up to 2000 raw event logs for the Uniswap V3 pool contract 0xC31E54c7a869B9FcBEcc14363CF510d1c41fa443 on Arbitrum between blocks 150000000 and 150005000 so I can audit recent swap and liquidity events.”

Technical details

Endpoint

POSThttps://chain.openverbs.com/v1/logs?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need to retrieve historical or recent on-chain event logs for a specific contract on EVM chains (Ethereum, Base, Arbitrum, Optimism, Polygon), especially when you want automatic decoding of ERC-20/721 Transfer events. Prefer this over general blockchain APIs when you need topic-filtered, bounded log queries with automatic endpoint fallback and a simple REST interface rather than a full RPC node.

Side effects

Invalid or missing contract address returns a validation error
Block range exceeding the cap is clamped silently — results may not cover the full requested range
No logs found in range returns an empty array
Invalid topic hex format (not 0x + 64 hex chars) causes a schema validation error
Unsupported chain name causes an enumeration error
Very high limit values are capped at 5000
RPC endpoint failures trigger automatic fallback but may cause latency spikes

Input

Schema · Request body

Field	Type	Description
chain	string	EVM chain to query. One of: ethereum, base, arbitrum, optimism, polygon. Default "ethereum".
limit	integer	Max logs to return (default 1000).
topics	array	Optional topic filters (topic0 = event signature hash). Up to 4; null matches any.
address	string	Contract address to query logs for (required — bounds the query).
toBlock	—	End block (decimal or 0x-hex) or "latest" (default). Max 5000-block span.
fromBlock	—	Start block (decimal or 0x-hex; not a tag).

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