ToolVet
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X402 Chain Reads V1 Base Eth Getlogs

by Base in Onchain & crypto

x402 APIPassing, checked 2 h ago

Base on-chain read: a contract's event logs, filtered by topic and block range. 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_getLogs entries.

GET
https://api.arysphere.com/v1/ventures/x402_chain_reads_v1/base_eth_getlogs
Price
$0.003
per call in USDC
Uptime
100%
last 30 days
Response time
309 ms
851 ms slowest 5%
Last check
Passed
2 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed · Watch with other listings

How to call it

GET https://api.arysphere.com/v1/ventures/x402_chain_reads_v1/base_eth_getlogs

Each call costs $0.003 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

GET https://api.arysphere.com/v1/ventures/x402_chain_reads_v1/base_eth_getlogs?address=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&blocks=10&topic0=0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef

Parameters

ParameterTypeRequiredDescription
addressstringNocontract, 0x + 40 hex
blocksstringNooptional, last N blocks, 1-100 (default 10)
topic0stringNooptional event signature hash, 0x + 64 hex

Example response

The provider's example. We can't check it without paying.

Example response, 47 lines
{
  "chain": "base",
  "method": "eth_getLogs",
  "ok": true,
  "result": {
    "count": 205,
    "from_block": 52384927,
    "logs": [
      {
        "address": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
        "blockHash": "0x070a9affe2a28d7cf48692cf3b39420a699e6e2c5549fcd351143931a329400f",
        "blockNumber": "0x31f549f",
        "blockTimestamp": "0x6ac90621",
        "data": "0x000000000000000000000000000000000000000000000000000000046059f24b",
        "logIndex": "0x0",
        "removed": false,
        "topics": [
          "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
          "0x000000000000000000000000b2cc224c1c9fee385f8ad6a55b4d94e92359dc59",
          ""
        ],
        "transactionHash": "0xd6acc3445213c7bb13fafe113c818965d71567c3a8d0defdba730577e0f4c85d",
        "transactionIndex": "0x1"
      },
      {
        "address": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
        "blockHash": "0x070a9affe2a28d7cf48692cf3b39420a699e6e2c5549fcd351143931a329400f",
        "blockNumber": "0x31f549f",
        "blockTimestamp": "0x6ac90621",
        "data": "0x00000000000000000000000000000000000000000000000000000001b91d1bf1",
        "logIndex": "0x3",
        "removed": false,
        "topics": [
          "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
          "0x000000000000000000000000160d7e9d948b16c163332a277b393c288408eb12",
          ""
        ],
        "transactionHash": "0x871c536d6987ca7ac859231108c11b5604874b55a50b9ed063bc55d1add86142",
        "transactionIndex": "0x3"
      },
      ""
    ],
    "to_block": 52384927,
    "truncated": true
  },
  "service": "x402_chain_reads_v1.base_eth_getlogs"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.003.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.arysphere.com/v1/ventures/x402_chain_reads_v1/base_eth_getlogs?address=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&blocks=10&topic0=0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://api.arysphere.com/v1/ventures/x402_chain_reads_v1/base_eth_getlogs?address=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&blocks=10&topic0=0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.003 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.003" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.003 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.arysphere.com%2Fv1%2Fventures%2Fx402_chain_reads_v1%2Fbase_eth_getlogs
const res = await pay("https://api.arysphere.com/v1/ventures/x402_chain_reads_v1/base_eth_getlogs?address=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&blocks=10&topic0=0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef");
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.003 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.003"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://api.arysphere.com/v1/ventures/x402_chain_reads_v1/base_eth_getlogs?address=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&blocks=10&topic0=0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef")
    print(res.status_code, res.text)

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
2 h agoPassed402851 ms$0.003
7 h agoPassed402309 ms$0.003
12 h agoPassed402308 ms$0.003