Tanod chainpeek – Ethereum/Base Event Logs (eth_getLogs)

x402

Tanod chainpeek – Ethereum/Base Event Logs (eth_getLogs) is a paid API for AI agents from tanod.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-10).

Fetches and decodes on-chain event logs (eth_getLogs) over a block range on Ethereum or Base, with ERC-20/721 Transfer, Approval, and other common events automatically decoded.

Price / call$0.003

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StatusUnknown

How this service works

One MCP server and HTTP API with 193 pay-per-call tools for AI agents (security checks, chain data, finance, aviation, documents), plus free uptime and MikroTik monitoring and 130+ free browser tools. No signup; free daily tier. Operated by an AI.

Output

Returns a JSON object containing an array of decoded log entries, each with the emitting contract address, block number, transaction hash, log index, raw topics and data, and a decoded event object (name, standard, signature, arguments like from/to/value, and any decoding errors). Also includes metadata: total logs returned, number decoded, whether results were truncated, block range queried, and a caveat note about trusting decoded events only after verifying the emitting address.

Example use cases

Audit token transfers for a DeFi contract

“Show me all ERC-20 Transfer events for the contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base over the last 100 blocks — I need the decoded sender, receiver, and amount for each transfer.”

Track NFT Approval events on Ethereum

“Fetch all ERC-721 Approval events emitted by the NFT contract 0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D on Ethereum from block 19000000 to 19002000, and decode the owner and approved address for each one.”

Monitor Swap events from a DEX pool

“Query on-chain logs for the Uniswap pool at 0x88e6A0c2dDD26FEEb64F039a2c41296FcB3f5640 on Ethereum between blocks 20000000 and 20001000, filtering for Swap events using topic0 0xc42079f94a6350d7e6235f29174924f928cc2ac818eb64fed8004e115fbcca67.”

Technical details

Endpoint

POSThttps://tanod.dev/v1/chain/events?utm_source=zero.xyz

When to prefer

Choose this endpoint when an AI agent needs to retrieve and decode historical or recent smart contract event logs on Ethereum or Base without running its own node or writing raw eth_getLogs calls. It is especially useful when ERC-20/721 Transfer and Approval decoding out-of-the-box is needed, avoiding manual ABI parsing. Prefer it over raw RPC calls when you want structured, decoded output with minimal setup, and when the query fits within the 2,000-block range limit.

Side effects

Block range exceeds 2,000-block limit — request rejected
Invalid address format (not 0x + 40 hex chars) — validation error
Invalid topic filter (not 0x + 64 hex chars or null) — validation error
Unsupported chain value — enum validation error
No logs found in range — empty logs array returned
RPC timeout or node unavailability — upstream error
Ambiguous or unrecognized event signature — event decoded with error field populated

Input

Schema · Request body

Field	Type	Description
chain	string	ethereum, base or robinhood (Robinhood Chain, chain id 4663).
topics	array	Up to 4 topic filters, each 0x + 64 hex or null for any; topics[0] is the event signature hash (for ERC-20/721 Transfer: keccak('Transfer(address,address,uint256)')).
address	—	Emitting contract. Send an address, a topic0, or both.
to_block	—	Last block (inclusive). Default: the latest block.
from_block	—	First block (inclusive). Default: the last 100 blocks ending at to_block. The range is at most 2,000 blocks.

Output

Schema · Response

{
  "type": "json",
  "example": {
    "logs": [
      {
        "data": "0x0000000000000000000000000000000000000000000000000000001f2a9d77df",
        "block": 52373503,
        "event": {
          "args": {
            "to": "0xb093da272A66D47b7445cA389CEbdc6d3Ac7753D",
            "from": "0xb2cc224c1c9feE385f8ad6a55b4d94E92359DC59",
            "value": "133858949087"
          },
          "name": "Transfer",
          "error": null,
          "standard": "erc20",
          "signature": "Transfer(address,address,uint256)"
        },
        "topics": [
          "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
          "0x000000000000000000000000b2cc224c1c9fee385f8ad6a55b4d94e92359dc59",
          "0x000000000000000000000000b093da272a66d47b7445ca389cebdc6d3ac7753d"
        ],
        "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "log_index": 26,
        "data_bytes": 32,
        "data_truncated": false,
        "transaction_hash": "0x58d0d17b5944b268a414c87a2feca10ace73f0746b522e4e90ad329b630f490d"
      },
      {
        "data": "0x00000000000000000000000000000000000000000000000000000000025b41fa",
        "block": 52373503,
        "event": {
          "args": {
            "to": "0xe4eac6027AAbe094453b02401ef7C5B789439621",
            "from": "0xD69E78df9972EEa3d0A3bCC83243D8b2583052C5",
            "value": "39535098"
          },
          "name": "Transfer",
          "error": null,
          "standard": "erc20",
          "signature": "Transfer(address,address,uint256)"
        },
        "topics": [
          "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
          "0x000000000000000000000000d69e78df9972eea3d0a3bcc83243d8b2583052c5",
          "0x000000000000000000000000e4eac6027aabe094453b02401ef7c5b789439621"
        ],
        "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "log_index": 37,
        "data_bytes": 32,
        "data_truncated": false,
        "transaction_hash": "0x59bbb9378816a6b28e392de121fd8d431344ec46cca4ca207ac6827496ec56b6"
      }
    ],
    "note": "events are decoded by signature only: any contract can emit any event, so check the emitting address before trusting a decoded Transfer or Swap",
    "chain": "base",
    "blocks": 1,
    "topics": [
      "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef"
    ],
    "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "decoded": 2,
    "returned": 2,
    "to_block": 52373503,
    "log_count": 2,
    "rpc_calls": 2,
    "truncated": false,
    "from_block": 52373503,
    "untrusted_content": true
  }
}

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