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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
| When | Result | HTTP | Time | Price |
|---|---|---|---|---|
| 2 h ago | Passed | 402 | 188 ms | $0.001 |
| 5 h ago | Passed | 402 | 192 ms | $0.001 |
| 8 h ago | Passed | 402 | 184 ms | $0.001 |
| 13 h ago | Passed | 402 | 180 ms | $0.001 |