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Chain Pending

by Pending block in Onchain & crypto

x402 APIPassing, checked 2 h ago

The chain's pending block: how many transactions are queued for the next block, the base fee they will pay, and the gas already used against the limit. This is the node's own view of what is about to be mined, so it answers "is the chain congested right now" without an indexer. Transaction hashes are included when the node returns them. EVM chains: ethereum, base, polygon, arbitrum, optimism.

GET https://agent402.tools/api/chain/pending

Last 30 days

All checks passedSome failedAll failedNot checked
Uptime
100%
Response time
184 ms typical, 188 ms slowest 5%
Last check
2 h ago
Next check
any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X GET "https://agent402.tools/api/chain/pending?network=base"
import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fagent402.tools%2Fapi%2Fchain%2Fpending
const res = await pay("https://agent402.tools/api/chain/pending?network=base");
console.log(await res.json());

Example input

{
  "network": "base"
}

Example output

{
  "baseFeePerGas": "4218231",
  "baseFeePerGasGwei": "0.004218",
  "gasLimit": "150000000",
  "gasUsed": "12904331",
  "network": "base",
  "note": "A pending block is the node's own view and differs between nodes; it is not a consensus value.",
  "number": "34881204",
  "timestamp": "2026-09-12T21:30:11.000Z",
  "transactionCount": 61
}

Security scan

  • No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
2 h agoPassed402188 ms$0.001
5 h agoPassed402192 ms$0.001
8 h agoPassed402184 ms$0.001
13 h agoPassed402180 ms$0.001