Arbitrum One recent event logs

$0.003 per call · failed calls are never charged · no account or API key needed

List recent event logs a contract emitted on Arbitrum One over the last N blocks (1-1,000, default 50), optionally filtered by topic0 (the 0x 32-byte event signature hash). Returns up to 100 logs with block, transaction hash and topics. Use to watch transfers or contract events; for one transaction's outcome use arb_receipt.

Run it free (25 free calls) Buy credits by card (from $5) Example result (JSON)

Inputs

NameTypeDescription
address (required)string0x contract address
blocksintegerHow many recent blocks to scan (1-1000, default 50)
topic0stringOptional 0x event signature hash to filter by

Request

Over HTTP, with a card key from /credits:

curl -H "Authorization: Bearer adt_…" "https://agent-data-tools.revmesh2074.workers.dev/arb/logs?address=0xaf88d065e77c8cC2239327C5EDb3A432268e5831"

Or one of your 25 free calls, no key:

curl "https://agent-data-tools.revmesh2074.workers.dev/arb/logs?address=0xaf88d065e77c8cC2239327C5EDb3A432268e5831&trial=1"

Without a key, the same URL answers 402 Payment Required with x402 and MPP terms, so an agent with a wallet pays per call in USDC (Base, Polygon, Arbitrum, Monad, World Chain or Tempo) and retries.

Example result

{
  "chain": "Arbitrum One",
  "chainId": 42161,
  "address": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
  "fromBlock": 123456739,
  "toBlock": 123456789,
  "count": 2,
  "truncated": false,
  "logs": [
    {
      "block": 123456780,
      "tx": "0x…",
      "logIndex": 3,
      "topics": [
        "0xddf2…"
      ],
      "data": "0x…"
    }
  ]
}

From an AI agent (MCP)

Add the MCP server to Claude, Cursor or any MCP client. This tool is arb_logs, and the first 25 successful calls are free:

https://agent-data-tools.revmesh2074.workers.dev/mcp

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